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SBE 37-IM MicroCAT

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					SBE 37-IM MicroCAT
Conductivity and Temperature Recorder with Inductive Modem




User’s Manual
Sea-Bird Electronics, Inc.
         th
1808 136 Place NE
Bellevue, Washington 98005 USA
Tel: 425/643-9866                Manual Version #006, 09/21/00
Fax:425/643-9954                 Firmware Version 2.1
             Limited Liability Statement
Extreme care should be exercised when using or servicing this equipment. It should be used or serviced
only by personnel with knowledge of and training in the use and maintenance of oceanographic
electronic equipment.

SEA-BIRD ELECTRONICS, INC. disclaims all product liability risks arising from the use or servicing
of this system. SEA-BIRD ELECTRONICS, INC. has no way of controlling the use of this equipment
or of choosing the personnel to operate it, and therefore cannot take steps to comply with laws
pertaining to product liability, including laws which impose a duty to warn the user of any dangers
involved in operating this equipment. Therefore, acceptance of this system by the customer shall be
conclusively deemed to include a covenant by the customer to defend, indemnify, and hold SEA-BIRD
ELECTRONICS, INC. harmless from all product liability claims arising from the use or servicing of
this system.




                                            2
                              Table of Contents




Table of Contents
               Section 1: Introduction ................................................................................... 5
               About this Manual............................................................................................. 5
               How to Contact Sea-Bird .................................................................................. 5
               Quick Start ........................................................................................................ 5
               Unpacking the MicroCAT................................................................................. 6
               Shipping Precautions......................................................................................... 7
               Section 2: Description of the MicroCAT ....................................................... 8
               System Description ........................................................................................... 8
               SBE 37-IM MicroCAT Specifications ............................................................ 10
               SBE 37-IM MicroCAT Dimensions in millimeters (inches)........................... 11
               Sample Timing ................................................................................................ 12
               Battery Endurance ........................................................................................... 12
               Surface Inductive Modem (SIM)..................................................................... 12
               Mooring Cable and Wiring Requirements....................................................... 13
               Section 3: Preparing the MicroCAT for Deployment ............................... 14
               Battery Installation .......................................................................................... 14
                   Description of Batteries and Battery Pack................................................ 14
                   Installing Batteries ................................................................................... 14
               Anti-Foul Material Check ............................................................................... 16
               Power and Communications Test and Setting MicroCAT IDs....................... 17
                   Test Set-Up .............................................................................................. 17
                   Test and Set MicroCAT ID ...................................................................... 18
               Section 4: Deploying and Operating the MicroCAT ................................. 22
               Set-Up for Deployment ................................................................................... 22
               Attaching the MicroCAT to the Mooring Cable ............................................. 23
               System Installation and Wiring ....................................................................... 24
                   Installing the Optional Inductive Cable Coupler (ICC)............................ 24
               Operation Description ..................................................................................... 25
                   Timeout Descriptions ............................................................................... 25
               Sampling Modes.............................................................................................. 26
                   Polled Sampling (Operating commands) ................................................. 26
                   Autonomous Sampling (Logging commands).......................................... 27
                   Combo Sampling...................................................................................... 28
                   Averaging Sampling................................................................................. 29
               Command Descriptions ................................................................................... 30
                   SIM Commands ....................................................................................... 31
                   MicroCAT Communication Microcontroller Commands ........................ 32
                   MicroCAT Acquisition Microcontroller Commands ............................... 33
               Data Output Formats ....................................................................................... 39
                   Data Output after Sending Get Data (DATAii) Command ...................... 39
                   Data Output after Sending Operating Commands (#iiTS, #iiSL, #iiSLT,
                   #iiTSSTX)................................................................................................ 39
                   Data Output after Sending Data Upload Command (#iiDDb,e, Upload
                   button on Toolbar, or Upload Data in Data menu)................................... 39
               Recovery ......................................................................................................... 40
                   Physical Handling .................................................................................... 40
                   Uploading Data ........................................................................................ 41




                                    3
               Table of Contents

Section 5: Routine Maintenance and Calibration ..................................... 45
Corrosion Precautions ..................................................................................... 45
Conductivity Cell Maintenance....................................................................... 45
    Routine Rinsing after Recovery ............................................................... 45
    Cleaning ................................................................................................... 45
Sensor Calibration ........................................................................................... 47
    Conductivity Sensor Calibration .............................................................. 47
    Temperature Sensor Calibration............................................................... 47
    Pressure Sensor (optional) Calibration..................................................... 47
Replacing Batteries ......................................................................................... 48
Replacing Anti-Foul Cylinders ....................................................................... 49
Glossary.......................................................................................................... 50

Appendix I: Functional Description ............................................................ 51
Sensors ............................................................................................................ 51
Sensor Interface............................................................................................... 51
Real-Time Clock ............................................................................................. 51
Appendix II: Electronics Disassembly/Reassembly.................................... 52
Disassembly .................................................................................................... 52
Reassembly...................................................................................................... 52
Appendix III: Command Summary............................................................. 53

Appendix IV: SIM Hook-up and Configuration ....................................... 57
Power Connection ........................................................................................... 57
Interface Option Connection (J1, J2, and J4) .................................................. 58
I/O Connector Wiring (JP2) ............................................................................ 58
Inductive Mooring Cable Connection (JP4).................................................... 58
Normal Deployed Operation (J5) .................................................................... 58
Appendix V: Replacement Parts.................................................................. 59

Index ............................................................................................................... 60

Warranty Policy
Service Information
Calibration Certificates
Pressure Test Certificate
Application Notes
Schematics




                     4
                                  Section 1: Introduction




Section 1: Introduction
                          This section includes contact information, Quick Start procedure, photos of a
                          standard MicroCAT shipment, and shipping precautions.



About this Manual
                          This manual is to be used with the SBE 37-IM MicroCAT Conductivity and
                          Temperature Recorder (pressure optional) with Inductive Modem.

                          It is organized to guide the user from installation through operation and data
                          collection. We’ve included detailed specifications, command descriptions,
                          maintenance and calibration information, and helpful notes throughout
                          the manual.

                          Sea-Bird welcomes suggestions for new features and enhancements of our
                          products and/or documentation. Please e-mail any comments or suggestions to
                          seabird@seabird.com.



How to Contact Sea-Bird
                          Sea-Bird Electronics, Inc.
                          1808 136th Place Northeast
                          Bellevue, Washington 98005 USA

                          Telephone:         425-643-9866
                          Fax:               425-643-9954
                          E-mail:            seabird@seabird.com
                          Website:           http://www.seabird.com

                          Business hours:
                          Monday-Friday, 0800 to 1800 Pacific Standard Time
                                   (1600 to 0200 Universal Time)
                          Except from April to October, when we are on ‘summer time’
                                   (1500 to 0100 Universal Time)



Quick Start
                          Follow these steps to get a Quick Start using the MicroCAT.
                          The manual provides step-by-step details for performing each task:
                          1. Perform pre-check (Section 3: Preparing the MicroCAT for Deployment):
                              A. Install batteries.
                              B. Test power and communications, and set MicroCAT ID.
                          2. Deploy the MicroCAT (Section 4: Deploying and Operating
                              the MicroCAT):
                              A. Install new batteries if necessary.
                              B. Ensure all data has been uploaded, and then set #iiSAMPLENUM=0
                                  to make entire memory available for recording if desired.
                              C. Set time and date.
                              D. Establish setup and logging parameters.
                              E. Deploying multiple MicroCATs: verify MicroCAT set to Prompt ID.
                              F. Set MicroCAT to start logging now or in the future.
                              G. Remove protective plugs from anti-foul cups, and verify anti-foul
                                  cylinders are installed. Leave protective plugs off for deployment.
                              H. Install MicroCAT on the mooring cable.
                              I. Install Inductive Cable Coupler (optional) on the mooring cable.
                              J. Wire system.


                                         5
                                    Section 1: Introduction


Unpacking the MicroCAT
                           Shown below is a typical MicroCAT shipment.




                                        SBE 37-IM MicroCAT                                  Batteries




                                                                                       Software
                                 User and SEASOFT Manuals




                         Cell cleaning solution                      Spare parts kit
                                (Triton-X)




                                 Surface Inductive Modem (SIM) PCB
                                      (one per mooring, optional)
                                                                          Inductive Cable Coupler (ICC)
                                                                          (optional with SIM, one per mooring)




                                          I/O Cable                         9-pin adapter
                                  (only included with SIM)            (only included with SIM)




                                           6
                                               Section 1: Introduction


Shipping Precautions
                                       The MicroCAT was shipped from the factory with the batteries packaged
                                       separately within the shipping box (not inside the MicroCAT). Before
                                       attempting to communicate with the MicroCAT, the batteries must be installed
                                       following the instructions in Section 3: Preparing the MicroCAT
           Assembled                   for Deployment.
           battery pack
                                       IMPORTANT NOTE:
                                       Depending on their classification, the shipment of lithium batteries is subject
                                       to safety regulation concerning Dangerous Goods or Hazardous Material
                                       imposed by the U.S. Department of Transportation (DOT) and the
                                       International Air Transportation Association (IATA). Other countries may also
                                       have their own regulations. The MicroCAT uses a lithium battery pack
 WARNING!                              comprised of six parallel 9-volt batteries. Each of the three cells in the 9-volt
 Do not ship assembled battery         battery contains less than 2 grams of lithium. In this form, the batteries are not
 pack by commercial aircraft.          considered Dangerous/Hazardous Goods, and may be shipped without
                                       restriction if they are NOT connected together and they are packaged to
                                       prevent accidental shorting of the battery contacts.

                                       When two or more 9-volt battery sticks are assembled into the instrument’s
                                       battery pack (either inside or outside the instrument housing), they are
                                       connected in parallel and ARE classified as Dangerous/Hazardous Goods.
                                       The assembled battery pack does not comply with DOT and IATA regulations
                                       requiring battery packaging test documentation and therefore MUST NOT BE
                                       SHIPPED VIA COMMERCIAL AIRCRAFT (those governed by DOT or
                                       IATA), INCLUDING PASSENGER AIRLINES, OR CARGO
                                       CARRIERS SUCH AS FEDEX, DHL, UPS, ETC.



                 Batteries packed      If you will re-ship the MicroCAT by commercial aircraft after you have
                 for shipment
                 by commercial         finished testing:
                 aircraft
                                       1.   Remove the battery pack assembly from the MicroCAT.

                                       2.   Remove the batteries from the battery pack assembly.

 Note:                                 3.   Pack the batteries separately to prevent accidental shorting of the
 All data and setup information is          battery contacts.
 preserved when the batteries are
 removed. However, the real-time
 clock does not run. Accordingly,
 time and date must be reset after
 final assembly and before
 deployment. See Section 4:
 Deploying and Operating
 the MicroCAT.


 Note:
 Batteries must be removed before
 returning the instrument to
 Sea-Bird. Do not return used
 batteries to Sea-Bird when shipping
 the MicroCAT for recalibration
 or repair.




                                                      7
                     Section 2: Description of the MicroCAT




Section 2: Description of the MicroCAT
                     This section describes the functions and features of the SBE 37-IM
                     MicroCAT, including specifications, dimensions, and mooring requirements.



System Description
                     The SBE 37-IM MicroCAT is a high-accuracy conductivity and temperature
                     recorder (pressure optional) with internal battery and non-volatile memory.
                     It uses an Inductive Modem (IM) to transmit data and receive commands over
                     a plastic-jacketed steel mooring cable (or other insulated conductor), using
                     differential-phase-shift-keyed (DPSK) telemetry. No electrical cables or
                     connectors are required. The MicroCAT’s built-in inductive coupler (split
                     toroid) and cable clamp provide easy and secure attachment to the mooring
                     cable. Designed for moorings and other long-duration, fixed-site deployments,
                     MicroCATs have non-corroding titanium housings rated for operation to
                     7000 meters (23,000 feet) or pressure sensor full-scale range.

                     Communicating with one or more MicroCATs requires the use of a Sea-Bird
                     Surface Inductive Modem (SIM). The SIM provides a standard serial interface
                     between the user’s computer or other controlling device and up to
                     100 MicroCATs (or other IM-compatible sensors), coupled to a single cable.
                     The user can communicate with the SIM via full-duplex RS-232C or half-
                     duplex RS-485. Commands and data are transmitted half-duplex between the
                     SIM and the MicroCAT.

                     Over 50 different commands can be sent to the MicroCAT to provide status
                     display, data acquisition setup, data retrieval, and diagnostic tests. User-
                     selectable operating modes include:
                     • Polled sampling – On command, the MicroCAT takes one sample and
                          transmits data.
                     • Autonomous sampling – At pre-programmed intervals, the MicroCAT
                          wakes up, samples, stores data in its FLASH memory, and powers off.
                     • Combo sampling – The last Autonomous sampling data is transmitted.
                     • Averaging sampling – The average of the Autonomous sampling data
                          since the last request is calculated and transmitted.

                     Calibration coefficients stored in EEPROM allow the MicroCAT to transmit
                     data in engineering units. The MicroCAT retains the temperature and
                     conductivity sensors used in the SBE 16 SEACAT C-T Recorder, but has
                     improved acquisition electronics that increase accuracy and resolution, and
                     lower power consumption. The MicroCAT’s aged and pressure-protected
                     thermistor has a long history of exceptional accuracy and stability (typical drift
                     is less than 0.002 °C per year).

                     The MicroCAT’s internal-field conductivity cell is unaffected by external
                     fouling, and uses expendable anti-fouling devices to inhibit internal fouling.
                     A plastic cup with threaded cover at each end of the cell retains the
                     anti-foul material. The toxin quantity is typically sufficient for at least
                     two year’s deployment.

                     The MicroCAT's optional pressure sensor, developed by Druck, Inc., has a
                     superior new design that is entirely different from conventional 'silicon' types
                     in which the deflection of a metallic diaphragm is detected by epoxy-bonded
                     silicon strain gauges. The Druck sensor employs a micro-machined silicon
                     diaphragm into which the strain elements are implanted using semiconductor
                     fabrication techniques. Unlike metal diaphragms, silicon's crystal structure is
                     perfectly elastic, so the sensor is essentially free of pressure hysteresis.
                     Compensation of the temperature influence on pressure offset and scale is
                     performed by the SBE MicroCAT's CPU.

                                   8
                                   Section 2: Description of the MicroCAT



                                   The MicroCAT is supplied with a powerful software package that includes:
Notes:                             • SEATERM – Win 95/98/NT terminal program for easy communication
1. Help files provide detailed
                                       and data retrieval.
   information on the use
   of SEATERM.                     • SEASOFT – DOS programs for calculation, display, and plotting of
2. A separate software manual          conductivity, temperature, pressure (optional), and derived variables such
   contains detailed information       as salinity and sound velocity. SEASOFT is designed to run on IBM
   on the setup and use of             compatible computers (XT/AT/386/486/Pentium). These programs
   SEASOFT.                            usually perform correctly when run under Windows.




                                                 9
                                 Section 2: Description of the MicroCAT


SBE 37-IM MicroCAT Specifications
                                                       Temperature        Conductivity         Optional
                                                       (°C)               (S/m)                Pressure
 Note:
 Pressure ranges are expressed   Measurement           -5 to +35          0 to 7               0 to full scale range
 in meters of deployment         Range                                    (0 to 70 mS/cm)
                                                                                               20/100/350/1000/
 depth capability.                                                                             3500/7000 meters
                                 Initial Accuracy      0.002              0.0003               0.15% of full scale
                                                                          (0.003 mS/cm)        range
                                 Typical Stability     0.0002             0.0003               0.0004% of full
                                 (per month)                              (0.003 mS/cm)        scale range
                                 Resolution            0.0001             0.00001              0.002% of full scale
                                                                          (0.0001 mS/cm)       range
                                 Sensor                +1 to +32          0 to 6; physical     Ambient pressure to
                                 Calibration                              calibration over     full scale range in
                                                                          the range 2.6 to     5 steps
                                                                          6 S/m, plus zero
                                                                          conductivity (air)
                                 Counter               Quartz TCXO, ±2 ppm per year aging;
                                 Time-Base             ±5 ppm vs. temperature (-5 to +30 °C)
                                 Memory                2048K byte non-volatile FLASH memory
                                 Data Storage          Converted temperature and conductivity: 5 bytes per
                                                       sample (2.5 bytes each). Time: 4 bytes per sample.
                                                       Pressure (optional): 2 bytes per sample.
                                                       Recorded                     Memory Space -
                                                       Parameters                   Total Number of Samples
                                                       C and T                           410,000
                                                       C, T, and P                       290,000
                                                       C, T, and time                    225,000
                                                       C, T, P, and time                 185,000
                                 Real-Time Clock       Watch-crystal type 32,768 Hz; corrrected for drift and
                                                       aging by comparison to MicroCAT counter time-base to
                                                       produce overall ± 5 ppm accuracy (±2.6 minutes/year)
                                 Standard              Nominal 6.0 Ampere-hour pack consisting of six 9-volt
                                 Internal              lithium batteries. When removed from MicroCAT and
                                 Batteries             battery pack, and batteries packed separately, batteries
                                                       can be shipped without hazardous material restrictions.
                                                       Quiescent Current: < 100 microamps
                                                       Operating Current:
                                                             Communicating - 3.1 milliamps
                                                             Sampling - 30.0 milliamps
                                 Power                 More than 100,000 samples
                                 Endurance
                                 Materials             Titanium pressure case rated at 7000 meters
                                                       (23,000 feet)
                                 Weight (without       In water: 2.4 kg (5.3 lbs)
                                 pressure sensor)      In air: 4.0 kg (8.8 lbs)




                                               10
                               Section 2: Description of the MicroCAT


SBE 37-IM MicroCAT Dimensions in millimeters (inches)



                                           139.7            Pressure
                                           (5.50)           port

                           67.3
                           (2.65)


                                       102.9
                                       (4.05)
                                                      62.2
                                                      (2.45)
                                                      Diameter




                          526.5
                          (20.73)




                                                11
                                 Section 2: Description of the MicroCAT


Sample Timing
                                 •   Power On Time for each sample while logging:
                                     With Pressure: 2.7 seconds
                                     Without Pressure: 2.2 seconds

                                 •   Take Sample Timing, which is the end of the Take Sample command
                                     (#iiTS or #iiTSR) to the beginning of the reply:
                                     With Pressure: 1.6 seconds
                                     Without Pressure: 1.2 seconds



Battery Endurance
                                 The battery pack has a nominal capacity of 6.0 AH. However, for planning
                                 purposes, Sea-Bird recommends using a conservative value of 5 AH.
 Notes:                          The quiescent current is less than 100 microamps (0.9 AH per year).
 1. If the MicroCAT is logging
    data and the battery         The number of ampere-hours per sample can be estimated by:
    voltage is less than
    6.15 volts for               0.030 A (Sampling current) * 3 sec (Sampling time)
    ten consecutive scans, the                                                          = 0.000025 AH
    MicroCAT halts logging and                      3600 sec/hour
    displays a low battery
    indication in the data.      To estimate the number of samples available during a deployment, subtract the
 2. See SBE 37-IM                quiescent current usage from the battery capacity, and then divide by the
    Specifications for data      ampere-hours per sample (0.000025 AH).
    storage limitations.
                                 Example: Estimate the number of samples available during a
                                 two-year deployment:

                                 5 AH (nominal capacity) – (2 years *0.9 AH/year)
                                                                                      = 128,000 samples
                                                    0.000025 AH/sample



Surface Inductive Modem (SIM)
                                 A Sea-Bird Surface Inductive Modem (SIM) PCB is required for
                                 communication with the MicroCAT. The SIM must be supplied with DC
                                 power in the range of 7 to 25 volts. The operating current is approximately
                                 60 milliamps when the modem is active.

                                 The user’s computer or buoy controller can be interfaced via RS-232
                                 (optional RS-485) serial port to the SIM. The standard interface protocol
                                 between the user’s computer/controller and the SIM is 9600 baud, 8 data bits,
                                 no parity, RS-232C, with echoing of characters.

                                 The SIM (a modem is a modulator/demodulator) impresses (modulates) the
                                 mooring cable with a DPSK signal that is encoded with the commands
                                 received from the user’s computer/controller. These encoded signals are
                                 demodulated by MicroCATs coupled to the mooring cable. Replies from
                                 MicroCATs are similarly coupled to the mooring cable and demodulated by
                                 the SIM.

                                 The DPSK communication link between the SIM and MicroCAT(s) is half-
                                 duplex, so talking and listening is sequential only. Although the data link
                                 between the SIM and the user’s computer/controller is established at
                                 9600 baud, the DPSK modem communication between SIM and MicroCATs
                                 operates at 1200 baud.



                                               12
                                       Section 2: Description of the MicroCAT


Mooring Cable and Wiring Requirements
                                      The MicroCAT can mechanically accommodate mooring cables up to 20 mm
 Note:
 See Appendix IV: SIM                 (0.78 inches) in diameter. Clamps for specific cable diameters are available, or
 Hook-Up and Configuration            can be supplied on a custom basis. Suitable mooring cables use steel wire rope
 for wiring details.                  with a polypropylene or polyethylene-insulating jacket. The SIM operates
                                      without data errors using up to 7000 meters (23,000 feet) of 3 mm
                                      (0.12 inches) or larger cable.

                                      The mooring cable must provide for connection to seawater ground below the
                                      deepest MicroCAT. Terminating the wire with a metallic eye or clevis readily
                                      provides this connection.

                                      The mooring cable must also provide for connection to the SIM. The SIM can
                                      be connected to the mooring cable by direct connection of the steel wire to the
                                      SIM (+) terminal, with seawater ground (typically the buoy hull) to SIM (-)
                                      terminal. Alternatively, with use of the optional Inductive Cable Coupler
                                      (ICC), the mooring cable goes through the ICC, and the ICC connects to
                                      the SIM.



      SMODEM-2
    Surface Inductive
    Modem (SIM) PCB                                                 SMODEM-1
                                                                    Surface Inductive               Buoy
                                                                    Modem (SIM)
                                                                    PCB


                                                                 Waterproof
                                                                 bulkhead
                                                                 connector


                                                                                                           Seawater ground
                                                                                Inductive Cable
          Seawater                                                              Coupler (ICC)
          ground
                                  SBE 37-IM
                                  MicroCAT
                                                                                                  SBE 37-IM
                                                                                                  MicroCAT
         Insulated mooring                                          Insulated mooring
         cable                                                      cable



       Seawater ground           Anchor                                                           Anchor
                                                                    Seawater ground

                  Direct Connection                                                    Connection with
                                                                                Inductive Cable Coupler (ICC)




                                                     13
                                      Section 3: Preparing the MicroCAT for Deployment




Section 3:
Preparing the MicroCAT for Deployment
                                          This section describes the pre-check procedure for preparing the MicroCAT
                                          for deployment. Installation of the battery pack, checking anti-foul material,
                                          and testing power and communications are discussed.



Battery Installation
 WARNING!                                 Description of Batteries and Battery Pack
 Do not air-ship the MicroCAT             Sea-Bird supplies six 9-volt (nominal 1 amp-hour) batteries, shipped with the
 with batteries installed.                MicroCAT in a separate bag. Since they use solid-cathode cells and contain a
 See Shipping Precautions in              total of less than 2 grams lithium metal, these batteries are not hazardous
 Section 1: Introduction.                 material as defined by IATA or the US DOT. They are free of shipping
                                          restrictions, but shipment of the assembled battery pack is governed by the
                                          Hazardous Material Regulations.

                                          In addition to the six 9-volt batteries, the assembled battery pack consists of:
                                          • a brass sleeve with lower printed circuit board (PCB) containing
                                               banana jacks
                                          • upper PCB containing banana plugs

                                          No soldering is required when assembling the battery pack because the
                                          batteries use the banana plugs and jacks as (+) and (-) terminals.

                                          Installing Batteries
                        Screws            1.   Remove the modem end cap:
                        securing               A. Wipe the outside of the modem end cap and housing dry, being
                        modem end
                        cap (screws               careful to remove any water at the seam between them.
                        shown                  B. Remove the two flat Phillips-head titanium machine screws. Do not
                        partially                 remove any other screws from the housing.
                        removed)               C. Remove the end cap by pulling firmly and steadily on the plastic
                                                  cable mounting bracket/inductive coupler. It may be necessary to
                                                  twist or rock the end cap back and forth or use a non-marring tool on
                      Cable                       the edge of the cap to loosen it.
                      mounting                 D. The end cap is electrically connected to the electronics with a 3-pin
                      bracket                     Molex connector. Holding the wire cluster near the connector, pull
                                                  gently to detach the female end of the connector from the pins.
                                               E. Remove any water from the O-ring mating surfaces inside the
                                                  housing with a lint-free cloth or tissue.
                                               F. Put the end cap aside, being careful to protect the O-rings from
                                                  damage or contamination.



             Molex connector




                                                         14
                                    Section 3: Preparing the MicroCAT for Deployment

                                        2.   Remove the battery pack assembly from the housing:
                                             A. Remove the large Phillips-head screw and lock washer from the
                                                upper PCB.
                                             B. Lift the battery pack assembly straight out of the housing, using
                                                the handle.




                               Handle




          Large screw


                                        3.   Remove the two small Phillips-head screws and lock washers from the
                                             upper PCB, and lift the upper PCB off the brass sleeve.
                  Small
                  screws


             Battery pack
             assembly



                                        4.   Insert each 9-volt battery onto the lower PCB, one at a time, banana plug
                                             end (+) first. Ensure each battery is fully inserted.



                          Battery




Upper   Brass
PCB     sleeve

                                        5.   Reinstall the upper PCB:
          Battery pack                       A. Press the upper PCB onto the battery pack assembly, aligning the
          assembly                               screw holes and mating banana plugs to the batteries. Ensure the
                                                 banana plugs are fully inserted into the batteries.
                 Small                       B. Re-fasten the upper PCB to the battery pack assembly with the two
                 screws                          small screws and lock washers.




                                                       15
                                           Section 3: Preparing the MicroCAT for Deployment

                                                 6.   Replace the battery pack assembly in the housing:
                                                      A. Align the D-shaped opening in the upper PCB with the D-shaped
                                                          notch on the shaft. Lower the assembly slowly into the housing, and
                                                          once aligned, push gently to mate the banana plugs on the battery
                                                          compartment bulkhead with the lower PCB. A post at the bottom of
                                                          the battery compartment mates with a hole in the battery pack’s lower
                                                          PCB to prevent improper alignment.
                                                      B. Secure the assembly to the shaft using the large Phillips-head screw
                                      D-shaped            and lock washer. Ensure the screw is tight to provide a reliable
                                      notch
                                                          electrical contact.




                                                 7.   Reinstall the modem end cap:
                                                      A. Remove any water from the O-rings and mating surfaces in the
                                                          housing with a lint-free cloth or tissue. Inspect the O-rings and
                                                          mating surfaces for dirt, nicks, and cuts. Clean as necessary.
                                                          Apply a light coat of O-ring lubricant (Parker Super O Lube) to
                                                          O-ring and mating surfaces.
                                                      B. Plug the female end of the 3-pin Molex connector onto the pins, with
  Molex connector
                                                          the flat portion of the female end against the flat portion of the ‘D’
                         O-rings
                                                          cutout. Verify the connector is properly aligned – a backward
                                                          connection will prevent communication with the computer.
                                                      C. Carefully fit the end cap into the housing until the O-rings are
                                                          fully seated.
                                                      D. Reinstall the flat Phillips-head titanium screws to secure the end cap.




Anti-Foul Material Check
                                                 New MicroCATs are shipped with anti-foul cylinders and protective plugs
                                                 pre-installed. Verify that the cylinders are in the anti-foul cups.
                                                 See Section 5: Routine Maintenance and Calibration for details on
             Anti-foul                           replacing the anti-foul cylinders.
             cylinder

                                                 The protective plugs must be removed prior to deployment or
                                                 pressurization. If the plugs are left in place during deployment, the sensor
                                                 will not register conductivity. If left in place during pressurization, the cell
                         Protective              may be destroyed.
                         plug




Plug




                                   Cup
Cap




                                                               16
                                       Section 3: Preparing the MicroCAT for Deployment


Power and Communications Test
and Setting MicroCAT IDs
                                           The power and communications test will verify that the system works,
                                           prior to deployment.

                                           Test Set-Up
 Note:                                     1.   If not already installed, install SEATERM and other Sea-Bird software
 It is possible to use the MicroCAT             programs on your computer using the supplied software CD:
 without SEATERM by sending                     A. Insert the CD in your CD drive.
 direct commands from a dumb                    B. Double click on Setup.exe.
 terminal or terminal emulator, such
                                                C. Follow the dialog box directions to install the software.
 as Windows HyperTerminal.
                                                The default location for the software is c:/Program Files/Sea-Bird. Within
                                                that folder is a sub-directory for each program.

                                           2.   For testing, loop a length of insulated wire through the MicroCAT’s
                                                modem coupling core to simulate a mooring cable. Connect the ends of
                                                this test wire to the mooring cable terminals on the SIM (JP4). Polarity of
                                                the connection when testing is not important. (See Appendix IV: SIM
                                                Hook-Up and Configuration for detailed information.)

                                           3.   On the SIM, remove the jumper on J5 (see Appendix IV). This will insert a
                                                1K resistor in series with the inductive loop and reduce signal amplitude,
 Note:                                          preventing MicroCATs that are near but not attached to the inductive loop
 Important! For Normal                          from responding to commands. (This is especially important when
 Deployed operation, reinstall                  sending the *ID= command.)
 the jumper across J5.
                                           4.   Connect the SIM to a lab power supply or other source between 10 and
                                                15 volts DC. Approximately 60 milliamperes are required. Do not turn
                                                on the power supply yet.

                                           5.   Connect the SIM to your computer’s serial port using the 9-25 pin cable
                                                supplied with the SIM. A 25-to-9 pin adapter is supplied for use if your
                                                computer has a 9-pin serial port.




                                                     MicroCAT



     To Computer
       Serial Port




    To Power
                                            Surface Inductive             Test wire to JP4
    Supply
                                            Modem (SIM) PCB




                                                          17
                                     Section 3: Preparing the MicroCAT for Deployment

                                         Test and Set MicroCAT ID
                                         Proceed as follows:
Note:
See SEATERM’s help files for             1.   Double click on SeaTerm.exe. If this is the first time the program is used,
detailed information on the use               the setup dialog box appears:
of the program.




                                              Select the instrument type (SBE 37) and the computer COM port for
                                              communication with the MicroCAT. Click OK.

                                         2.   The main screen looks like this:

                                                                                                   Menus



                                                                                                    Toolbar
                                                  Command/Data Echo Area

                                                                                                               Capture
                                                                          Status bar                            to file
                                                                                                               status –
                                                                                                               grayed
                                                               Computer                  Upload               out if not
Note:                                                          COM port
                                           Instrument                                   parameter             capturing
There is at least one way, and as
many as three ways, to enter
a command:
• Manually type a command in
  Command/Data Echo Area
• Use a menu to automatically                        Instrument            Baud rate, data bits,
  generate a command                               EPROM version           stop bits, and parity
• Use a Toolbar button to
  automatically generate                      •    Menus – Contains tasks and frequently executed instrument
  a command                                        commands.
                                              •    Toolbar – Contains buttons for frequently executed tasks and
                                                   instrument commands. All tasks and commands accessed through the
                                                   Toolbar are also available in the Menus. To display or hide the
Note:                                              Toolbar, select View Toolbar in the View menu. Grayed out Toolbar
Once the system is configured and                  buttons are not applicable.
connected (Steps 3 through 5                  •    Command/Data Echo Area – Echoes a command executed using a
below), to update the Status bar:                  Menu or Toolbar button, as well as the instrument’s response.
• on the Toolbar, click Status; or                 Additionally, a command can be manually typed in this area, from the
• from the Utilities menu, select                  available commands for the instrument. Note that the instrument must
  Instrument Status.                               be awake for it to respond to a command (use the Connect button on
SEATERM sends the status
                                                   the Toolbar to wake up the instrument).
command, which displays in the
Command/Data Echo Area, and                   •    Status bar – Provides status information. To display or hide the Status
updates the Status bar.                            bar, select View Status bar in the View menu.

                                                        18
Section 3: Preparing the MicroCAT for Deployment

    Following are the Toolbar buttons applicable to the MicroCAT:

      Toolbar           Description                                 Equivalent
      Buttons                                                       Command*
      Connect      Re-establish communications by sending           PWRON
                   wakeup tone to all MicroCATs. Computer
                   responds with S> prompt. MicroCATs go to
                   sleep after two minutes without
                   communication from computer have
                   elapsed.
      Status       Display instrument setup and status           #iiDS
                   (logging, number of samples in memory,
                   etc.).
      Coefficients Display calibration coefficients.             #iiDC
      Capture      Capture instrument responses on screen to —
                   file. File has .CAP extension. Press Capture
                   again to turn off capture. Capture status
                   displays in Status bar.
      Upload       Upload data stored in MicroCAT’s memory, #iiDDb,e
                   in format the Convert utility can use to      (use Upload
                   allow for post-processing in SEASOFT.         key if you
                   Uploaded data has .ASC extension.             will be post-
                   Before using Upload:                          processing
                   • Configure upload and header                 data with
                         parameters in Configure menu            SEASOFT)
                   • Send #iiSTOP command to stop logging
      Convert      Convert uploaded ASCII data to .CNV data, —
                   which can then be processed by SEASOFT
                   (post-processing software).
      Diagnostics Perform one or more diagnostic tests on        #iiDS,
                   MicroCAT. Diagnostic test(s) accessed in      #iiDC,
                   this manner are non-destructive –             #iiTS, and
                   they do not write over any existing           #iiTSR
                   instrument settings.
      Stop         Interrupt and end current activity, such as   —
                   logging, uploading, or diagnostic test.
      Disconnect Free computer COM port used to                  —
                   communicate with MicroCAT. COM port can
                   then be used by another program.
    *See Command Descriptions in Section 4: Deploying and Operating
    the MicroCAT.




                   19
                                       Section 3: Preparing the MicroCAT for Deployment

                                           3.   In the Configure menu, select SBE 37. The dialog box looks
                                                like this:




                       Computer COM                                                       Interface for communication
                       port, baud rate,                                                   between SIM and MicroCAT
                       data bits, and
                       parity for
                       communication                                                                  • Prompt ID when multiple
                       between computer                                                                 inductive modem
                       and SIM                                                                          instruments are on-line
                                                                                                        (for example, when
                                                                                                        deployed). If set to
                                                                                                        Prompt ID, the system
                                                                                                        requests the user to input
                                                                                                        the instrument ID every
                                                                                                        time a command is sent
                                                                                                        via a Toolbar button
                                                                                                        or menu.
                                                                                                      • Automatically get ID
                                                                                                        when only one inductive
                                                                                                        modem iinstrument is on-
                                                                                                        line (for example, when
                                                                                                        testing an instrument).




                                                Make the selections in the Configuration Options dialog box:
                                                • COMM Port: COM 1 through COM 10, as applicable
                                                • Baud Rate: 9600
Note:
When deploying on a mooring                     • Data Bits: 8
cable with multiple MicroCATs,                  • Parity: None
change Modem /RS485 ID to                       • Mode: Inductive Modem
Prompt ID after testing is complete.            • Modem/RS485 ID: Automatically get I.D.
                                                Click OK to overwrite an existing configuration file, or click Save As to
                                                save the configuration as a new filename.

                                           4.   Turn on the SIM power supply (if already on, turn it off and then on
                                                again). The display looks like this:
                                                     SBE 37 SURFACE MODEM V 2.2
                                                     S>
                                                     Sending wake up tone, wait 4 seconds
                                                     S>
                                                This shows that correct communications between the computer and the
                                                SIM has been established, and the SIM has sent the wake-up signal to the
                                                MicroCAT.
                                                If the system does not respond as shown above:
                                                • Click the Connect button on the Toolbar.
                                                • Verify the correct instrument was selected in the Configure menu and
                                                     the settings were entered correctly in the Configuration Options
                                                     dialog box. Note that the baud rate is documented on the front cover
                                                     of this manual.
                                                • Check cabling between the computer, the SIM, and the MicroCAT.

                                           5.   Click the Connect button on the Toolbar. This allows the system to use
                                                the Automatically get I.D. feature when using the Toolbar keys or menus.




                                                          20
                                       Section 3: Preparing the MicroCAT for Deployment

                                           6.   Confirm the MicroCAT has responded to the wake-up signal by typing
                                                ID? and pressing the Enter key. The display looks like this:
                                                     id=01
                                                where 01 is the number set at the factory or by the previous user. See the
                                                manual front cover for the factory-set identification (ID) number. Note
                                                that the ID is stored in the MicroCAT’s EEPROM and can be changed so
                                                that multiple MicroCATs on a single mooring each have a unique ID.
                                                Press the Enter key to get the S> prompt.
Note:
The SIM and MicroCAT have                  7.   Display MicroCAT status information by typing #iiDS (ii=MicroCAT ID
timeout algorithms designed to:                 number) and pressing the Enter key. The display looks like this:
• restore control to the computer if
    an illegal command is sent                  SBE 37-IM V 2.1 SERIAL NO. 0069 07-20-2000 11:55:19
• conserve battery energy if too                    logging not started
    much time elapses between                       sample interval = 20 seconds
    commands                                        samplenumber = 52, free = 127948
If the system does not appear to                    store time with each sample
respond, see Timeout Descriptions                   transmit sample number
in Section 4: Deploying and                         A/D cycles to average = 4
Operating the MicroCAT                              reference pressure = 0.0 db
for details.                                        temperature =19.48 deg C

                                           8.   Command the MicroCAT to take a sample by typing #iiTS
                                                (ii = MicroCAT ID number) and pressing the Enter key. The display
                                                looks like this:
                                                00069, 23.7658, 0.00019, 0.062, 20 Jul 2000, 11:55:45
                                                where         00069 = MicroCAT serial number 69 (37IM15956-0069)
                                                              23.7658 = temperature in degrees Celsius
                                                              0.00019 = conductivity in S/m
                                                              0.062 = pressure in dBars
                                                              20 Jul 2000 = date
                                                              11:55:45 = time
                                                These numbers should be reasonable; i.e., room temperature, zero
                                                conductivity, barometric pressure (gauge pressure), current date and time
                                                (Pacific Daylight or Standard Time).
                                                Press the Enter key to get the S> prompt.

                                           9.   Each MicroCAT on a mooring must have a unique ID for communicating
                                                with the SIM and computer:
                                                A. Set the MicroCAT ID by typing *ID=ii
                                                    (ii= user-assigned ID number) and pressing the Enter key.
                                                B. The computer responds by requesting verification, requiring you to
                                                    again type *ID=ii and press the Enter key.
                                                C. Record the ID for future reference.
                                                D. Press the Enter key to get the S> prompt.
                                                E. Click the Connect button on the Toolbar. This allows the system to
                                                    use the Automatically get I.D. feature when using the Toolbar keys or
                                                    menus.

                                           10. Command the MicroCAT to go to sleep (quiescent mode) by typing #iiQS
                                               (ii = MicroCAT ID number) and pressing the Enter key.


Note:                                      The MicroCAT is ready for deployment.
Important! When testing and
ID setting is complete for all
the MicroCATs, reinstall the
J5 jumper on the SIM PCB.
The jumper must be installed for
Normal Deployed operation.



                                                          21
                                         Section 4: Deploying and Operating the MicroCAT




Section 4: Deploying and Operating
the MicroCAT
 Note:                                        This section provides instructions for deploying the MicroCAT.
 A separate software manual contains          It also includes a discussion of system operation, example sets of operation
 detailed information on installation,        commands, and detailed command descriptions.
 setup, and use of SEASOFT.



Set-Up for Deployment
                                              1.   Install new batteries or ensure the existing battery pack has enough
                                                   capacity to cover the intended deployment. See Section 5: Routine
                                                   Maintenance and Calibration for details on installing new batteries.

                                              2.   Program the MicroCAT for the intended deployment (see Section 3:
                                                   Preparing the MicroCAT for Deployment for connection information; see
                                                   information in this section on commands and sampling modes):

                                                   A. Ensure all data has been uploaded, and then set #iiSAMPLENUM=0
                                                      to make the entire memory available for recording. If
                                                      #iiSAMPLENUM is not reset to zero, data will be stored after the
                                                      last recorded sample.

                                                   B. Set the date and time. Note that the date and time can be set
 Note:                                                individually for each MicroCAT (#iiMMDDYY= or #iiDDMMYY=
 1. If the battery pack has been
                                                      to set date; #iiHHMMSS= to set time), or globally for all
    removed, the date and time
    must be reset.                                    MicroCATs online (MMDDYY= or DDMMYY= to set date;
 2. It is always necessary to set                     HHMMSS= to set time). To synchronize autonomous sampling for a
    both date and time. If a new                      system with multiple MicroCATs on a mooring cable, set the date
    date is entered but not a                         and time globally, with all the MicroCATs online (see Autonomous
    new time, the new date will                       Sampling in this section for details on synchronization).
    not be saved.
                                                   C. Establish the setup and logging parameters.

                                                   D. If the system will have multiple MicroCATs on a mooring cable,
                                                      verify the MicroCAT is set to Prompt ID to allow use of the Toolbar
                                                      buttons and Menus:
                                                      1) In the Configure menu, select SBE 37.
                                                      2) Click on the COM Settings tab.
                                                      3) For Modem/RS485 ID, click on Prompt ID.
                                                      4) Click OK or Save As.

                                                   E. Use one of the following sequences to initiate logging:
                                                      • #iiSTARTNOW to start logging now, taking a sample every
                                                          #iiINTERVAL seconds.
                                                      • #iiSTARTMMDDYY=, #iiSTARTHHMMSS=, and
                                                          #iiSTARTLATER to start logging at the specified date and
                                                          time, taking a sample every #iiINTERVAL seconds.




                                                             22
                               Section 4: Deploying and Operating the MicroCAT


Attaching the MicroCAT to the Mooring Cable
                                      1.   Remove the protective plugs, if installed, from the anti-foul cups.
Remove                                     Verify that the two plastic cups contain anti-foul cylinders (see Section 5:
plugs (2)
                         Cups (2)
                                           Routine Maintenance and Calibration for anti-foul cylinder replacement).




                                      2.   Fix the mounting brackets to the insulated mooring cable:
                                           A. Open each mounting bracket by unthreading the large hex bolts.
                                           B. Place the insulated mooring cable inside the brackets’ grooves.
                Mounting brackets –        C. Reinstall each bracket half with the two large hex bolts
                loosen hardware to         D. Verify that the two halves of the modem coupling toroid have come
                separate bracket                together evenly.
                halves and mount on
                mooring cable




              Modem
              coupling
              toroid


                                      3.   Verify that the hardware and external fittings are secure.




                                                    23
                               Section 4: Deploying and Operating the MicroCAT


System Installation and Wiring
                                    For system installation and wiring details, refer to:
                                    • Mooring Cable and Wiring Requirements in Section 2: Description of
                                        the MicroCAT

                                    •    Appendix IV: SIM Hook-up and Configuration.

           Wiring to SIM PCB        Installing the Optional Inductive Cable Coupler (ICC)
                                    1.   Loosen the two titanium hex head bolts connecting the two halves of the
                                         ICC. Pull the halves apart.

                                    2.   Place the two halves of the ICC around the insulated mooring cable, with
                                         the cable inside the groove.

                                    3.   Re-tighten the two hex bolts, securing the insulated mooring cable
                                         in the ICC.




       Groove for insulated
       mooring cable




                                                   24
                             Section 4: Deploying and Operating the MicroCAT


Operation Description
                                  The MicroCAT’s internal functions are supervised by two internal
                                  microcontrollers. The acquisition microcontroller supervises measurement
                                  acquisition, and setup and sampling functions. The communication
                                  microcontroller supervises communication between the MicroCAT and SIM.
                                  These two microcontrollers allows for independent control of power usage by
                                  the communication and acquisition circuits. Acquisition consumes more
                                  power, but for shorter duration. Communication protocols take proportionately
                                  more time, but can be controlled separately and are operated at lower power,
                                  thus maximizing battery life. This also prevents communication protocols
                                  from interfering with measurement acquisition timing.

                                  Commands sent to the SIM can be directed to the SIM, the MicroCAT
                                  communication microcontroller, or the MicroCAT acquisition microcontroller.
                                  A command prefix (ID) is used to direct commands to a MicroCAT with the
                                  same ID. Global commands do not require a prefix and are recognized by all
                                  MicroCATs attached to the same inductive cable.

   Surface Inductive Modem             MicroCAT Communication                       MicroCAT Acquisition
             (SIM)                          Microcontroller                            Microcontroller
   • Power on/Power off               • Get Data                                •    Status
   • Display Firmware                 • Set MicroCAT ID                         •    Setup
      Version                         • Display Firmware version                •    Logging
   • Set Timeouts                     • Global commands to get                  •    Operating
   • Set Echo parameter                  data and set clock                     •    Data Upload
                                                                                •    Testing
                                                                                •    Calibration Coefficients


                                  Timeout Descriptions
                                  Both the SIM and the MicroCAT have timeout algorithms.

                                  SIM Timeouts
                                  SIM timeouts restore control to the computer if no reply is received from the
                                  MicroCAT (for example, upon sending an illegal command) within a specified
                                  length of time. This allows new commands to be sent. There are two user-
                                  programmable SIM timeouts:

                                  •     DATANNMAX – timeout that applies to the DATAii command only.
                                        Default is 1000 milliseconds.

                                  •     RELAYMAX – timeout that applies to all other commands. Default is
                                        20 seconds.

                                  When using RS-232 between the SIM and the computer, control of the SIM
                                  can be re-established sooner than the timeout by pressing the Esc key and then
                                  the Enter key. When the S> prompt is displayed, new commands can be sent.

                                  MicroCAT Timeout
                                  If the MicroCAT does not receive a command for two minutes, it powers
                                  down its communication circuits to prevent exhaustion of its batteries.
                                  To re-establish control, send the PWRON command or click the Connect
                                  button on the Toolbar.




                                                 25
                 Section 4: Deploying and Operating the MicroCAT


Sampling Modes
                      The MicroCAT has four basic sampling modes for obtaining data on
                      temperature, conductivity, and optional pressure:
                      • Polled Sampling
                      • Autonomous Sampling
                      • Combo Sampling
                      • Averaging Sampling

                      Sampling and logging commands can be used in various combinations and in
                      one or more sampling modes to provide a high degree of operating flexibility.
                      Review the operation of the four basic sampling modes and the commands
                      described in Command Descriptions before setting up your system.

                      Descriptions and examples of the sampling modes follow for a system with
                      three MicroCATs (IDs 01, 02, and 03) on a mooring cable. Note that the
                      MicroCAT’s response to each command is not shown in the examples.

                      Polled Sampling (Operating commands)
                      The MicroCAT takes one sample of data and sends the data to the SIM.
                      Storing of data in the MicroCAT’s FLASH memory is dependent on the
                      particular command used. Note that it is not possible to synchronize the data
                      samples from each MicroCAT in polled sampling.

                                  Example: Polled Sampling
                                  Send wakeup tone to all MicroCATs. Command each MicroCAT
                                  to take a sample, and send converted data to SIM. Send power-off
                                  command to all MicroCATs.
                                  (Click Connect on Toolbar to wake up all MicroCATs.)
                                  S>#01TS
                                  S>#02TS
                                  S>#03TS
                                  S>PWROFF




                                     26
                                     Section 4: Deploying and Operating the MicroCAT

                                          Autonomous Sampling (Logging commands)
                                          The MicroCAT wakes up, samples data at pre-programmed intervals, stores
                                          the data in its FLASH memory, and powers-off (enters quiescent mode). The
                                          MicroCAT does not transmit data to the SIM. Logging is started with
                                          #iiSTARTNOW or #iiSTARTLATER, and is stopped with #iiSTOP.

                                          To synchronize the data samples for each MicroCAT in Autonomous
                                          Sampling (see SBE 37-IM MicroCAT Specifications in Section 2: Description
                                          of the MicroCAT for the real-time clock specifications):
                                          • Send a global command to set the date and time for all the MicroCATs
                                          • Set the sampling interval for each MicroCAT to the same value
                                          • Set the start date and time for each MicroCAT to the same value

                                          The MicroCAT has a lockout feature to prevent unintended interference with
                                          sampling. If the MicroCAT is logging or is waiting to start logging (the
Note:                                     #iiSTARTLATER command has been sent, but logging hasn’t started yet),
Use the #iiSTOP command to:               only the following commands will be accepted:
• stop logging                            • All SIM commands,
• stop waiting to start logging
                                          • These MicroCAT Communication Microcontroller commands: GDATA,
  (after #iiSTARTLATER command
  has been sent)                              DATAii, ?ID, !iiDS
Once #iiSTOP is sent, the MicroCAT        • These MicroCAT Acquisition Microcontroller commands:
will accept all commands again.               #iiDS, #iiDC, #iiTS, #iiTSR, #iiSL, #iiSLT, #iiSLTR, #iiGA, #iiSACG,
                                              #iiSARG, #iiSAC, #iiSAR, #iiSS, #iiQS, and #iiSTOP.


                                                      Example: Autonomous Sampling
                                                      Send wakeup tone to all MicroCATs. Set the time and date, using
                                                      the global command. For each MicroCAT: set sample number to
                                                      zero to overwrite previous data in FLASH memory, take samples
                                                      every 10 seconds, store data in FLASH memory, store time and
                                                      date with samples, and start on 10 January 2001 at 12:00:00.
                                                      (Click Connect on Toolbar to wake up all MicroCATs.)
                                                      S>MMDDYY=010501
                                                      S>HHMMSS=120000
                                                      S>#01SAMPLENUM=0
                                                      S>#01INTERVAL=10
                                                      S>#01STORETIME=Y
                                                      S>#01STARTMMDDYY=011001
                                                      S>#01STARTHHMMSS=120000
                                                      S>#01STARTLATER
                                                      (repeat #iiSAMPLENUM through #iiSTARTLATER
                                                      commands for MicroCATs 02 and 03)
                                                      S>PWROFF

                                                      When ready to upload all data to computer, wake up all
                                                      MicroCATs, stop sampling, and upload data:
                                                      (Click Connect on Toolbar to wake up all MicroCATs.)
                                                      S>#01STOP
                                                      (Click Upload on Toolbar – program leads you through screens to
                                                      define data to be uploaded and where to store it)
                                                      (repeat commands for MicroCATs 02 and03)
                                                      S>PWROFF




                                                         27
Section 4: Deploying and Operating the MicroCAT

     Combo Sampling
     Combo Sampling combines Autonomous Sampling with the ability to retrieve
     the last stored data sample from each MicroCAT, to allow the user to look at
     some data without stopping the sampling. As in Autonomous Sampling, the
     MicroCAT wakes up, samples data at pre-programmed intervals, stores the
     data in its FLASH memory, and powers-off (enters quiescent mode).
     When desired, the user can request the last stored data sample from a
     particular MicroCAT.

                 Example: Combo Sampling
                 Send wakeup tone to all MicroCATs. Set the time and date, using
                 the global command. For each MicroCAT: set sample number to
                 zero to overwrite previous data in FLASH memory, take samples
                 every 10 seconds, store data in FLASH memory, store time and
                 date with samples, and start on 10 January 2001 at 12:00:00.
                 (Click Connect on Toolbar to wake up all MicroCATs.)
                 S>MMDDYY=010501
                 S>HHMMSS=120000
                 S>#01SAMPLENUM=0
                 S>#01INTERVAL=10
                 S>#01STORETIME=Y
                 S>#01STARTMMDDYY=011001
                 S>#01STARTHHMMSS=120000
                 S>#01STARTLATER
                 (repeat #iiSAMPLENUM through #iiSTARTLATER
                 commands for MicroCATs 02 and03)
                 S>PWROFF

                 After logging begins, look at data from last sample to
                 check results:
                 (Click Connect on Toolbar to wake up all MicroCATs.)
                 S>#01SL
                 S>#02SL
                 S>#03SL
                 S>PWROFF

                 When ready to upload all data to computer, wake up all
                 MicroCATs, stop sampling, and upload data:
                 (Click Connect on Toolbar to wake up all MicroCATs.)
                 S>#01STOP
                 (Click Upload on Toolbar – program leads you through screens to
                 define data to be uploaded and where to store it)
                 (repeat commands for MicroCATs 02 and03)
                 S>PWROFF




                    28
Section 4: Deploying and Operating the MicroCAT

     Averaging Sampling
     Averaging Sampling combines Autonomous Sampling with the ability to
     retrieve averaged data from each MicroCAT, to allow the user to look at
     averaged data without stopping sampling. As in Autonomous Sampling, the
     MicroCAT wakes up, samples data at pre-programmed intervals, stores the
     data in its FLASH memory, and powers-off (enters quiescent mode). As the
     MicroCAT is sampling, it automatically adds the data values (C, T, and
     optional P) for each sample to an averaging section in the FLASH memory,
     and keeps track of the number of samples since the last averaging request.
     When desired, the user can globally request the average of the data sampled
     since the last request. Each MicroCAT gets the data from the averaging
     section in FLASH, divides the sums by the number of samples, holds the
     averaged data (C, T, and optional P) in a buffer, and resets the averaging
     section to begin a new average. The user can then request the averaged data
     from a particular MicroCAT.


                 Example: Averaging Sampling
                 Send wakeup tone to all MicroCATs. Set the time and date, using
                 the global command. For each MicroCAT: set sample number to
                 zero to overwrite previous data in FLASH memory, take samples
                 every 10 seconds, store data in FLASH memory, store time and
                 date with samples, and start on 10 January 2001 at 12:00:00.
                 (Click Connect on Toolbar to wake up all MicroCATs.)
                 S>MMDDYY=010501
                 S>HHMMSS=120000
                 S>#01SAMPLENUM=0
                 S>#01INTERVAL=10
                 S>#01STORETIME=Y
                 S>#01STARTMMDDYY=011001
                 S>#01STARTHHMMSS=120000
                 S>#01STARTLATER
                 (repeat #iiSAMPLENUM through #iiSTARTLATER
                 commands for MicroCATs 02 and03)
                 S>PWROFF

                 After logging begins, send the global command to calculate
                 converted average data and start a new average for each
                 MicroCAT. Then send the command to each MicroCAT to
                 transmit the averaged data.
                 (Click Connect on Toolbar to wake up all MicroCATs.)
                 S>GDATA
                 S>DATA01
                 S>DATA02
                 S>DATA03
                 S>PWROFF

                 When ready to upload all data to computer, wake up all
                 MicroCATs, stop sampling, and upload data:
                 (Click Connect on Toolbar to wake up all MicroCATs.)
                 S>#01STOP
                 (Click Upload on Toolbar – program leads you through screens to
                 define data to be uploaded and where to store it)
                 (repeat commands for MicroCATs 02 and03)
                 S>PWROFF




                    29
                       Section 4: Deploying and Operating the MicroCAT


Command Descriptions
                            This section describes commands and provides sample outputs.
                            See Appendix III: Command Summary for a summarized command list.

                            When entering commands:

                            •    Input commands to the MicroCAT in upper or lower case letters and
                                 register commands by pressing the Enter key.

                            •    The MicroCAT sends ? CMD if an invalid command is entered.

                            •    If the system does not return an S> prompt after executing a command,
                                 press the Enter key to get the S> prompt.

                            •    If a new command is not received within two minutes after the completion
                                 of a command, the MicroCAT returns to the quiescent (sleep) mode.

                            •    If in quiescent mode, re-establish communications by clicking the
                                 Connect button on the Toolbar or entering the PWRON command to get
                                 an S> prompt.




                                           30
Section 4: Deploying and Operating the MicroCAT

     SIM Commands
     Power On/Power Off Commands
     PWRON                       Send wakeup tone to all MicroCATs.
                                 Equivalent to Connect button on Toolbar.

     PWROFF                                Send power-off command to all
                                           MicroCATs. Main power turned off and
                                           MicroCATs placed in quiescent (sleep)
                                           mode. Data logging and memory retention
                                           not affected.

     Firmware Version Command
     DS                                    Display SIM firmware version.

     Timeout Commands
     DATANNMAX=n                           Set timeout (0-32767 milliseconds) that
                                           applies to DATAii command only.
                                           Default 1000 milliseconds.

     RELAYMAX=n                            Set timeout (0 - 32767 seconds) that
                                           applies to all other commands.
                                           Default 20 seconds.

     Echo Commands
     ECHOON                                Echo characters received from computer
                                           (default) - computer monitor will show
                                           entered commands as you type.

     ECHOOFF                               Do not echo characters received from
                                           computer - computer monitor will not
                                           show entered commands as you type.




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                                    Section 4: Deploying and Operating the MicroCAT

                                         MicroCAT Communication Microcontroller Commands
                                         Global Commands
                                         GDATA                                 Command all MicroCAT communication
                                                                               microcontrollers to get average data from
                                                                               acquisition units and start next averaging
                                                                               cycle. MicroCAT communication
                                                                               microcontrollers hold averaged data in a
                                                                               buffer until receiving DATAii command.

Notes:                                   MMDDYY=mmddyy                         Set real-time clock month, day, and year
1. DDMMYY= and MMDDYY=                                                         for all MicroCATs. This command must
   commands are equivalent.                                                    be followed by HHMMSS= command to
   Either can be used to set
                                                                               set time.
   the date.
2. If the MicroCAT battery pack
   has been removed, the date and        DDMMYY=ddmmyy                         Set real-time clock day, month, and year
   time must be reset.                                                         for all MicroCATs. This command must
3. It is always necessary to set                                               be followed by HHMMSS= command to
   both date and time. If a new                                                set time.
   date is entered but not a new
   time, the new date will not           HHMMSS=hhmmss                         Set real-time clock hour, minute,
   be saved.                                                                   and second for all MicroCATs.

                                         Get Data Command
                                         DATAii                                Get averaged data obtained with GDATA
                                                                               command from MicroCAT with ID = ii.

                                         MicroCAT ID Command
                                         Only one MicroCAT can be on line when sending these commands.

                                         ID?                                   Get MicroCAT ID
                                                                               (ID = ii, where ii= 0-99).

                                         *ID=ii                                Set MicroCAT ID to ii, where ii= 0-99.
                                                                               This command must be sent twice,
                                                                               because the computer requests
                                                                               verification. . Note that if more than one
                                                                               MicroCAT is on-line when sending this
                                                                               command, all MicroCATs on-line will
                                                                               be set to same ID.

                                         MicroCAT Communication Microcontroller
                                         Firmware Version Command
                                         !iiDS                      Display MicroCAT communication
                                                                    microcontroller firmware version for
                                                                    MicroCAT with ID=ii.




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                                        Section 4: Deploying and Operating the MicroCAT

                                             MicroCAT Acquisition Microcontroller Commands
                                             All MicroCAT Acquisition Microcontroller commands are preceded
                                             by #ii (ii= MicroCAT ID).

                                             Status Command
                                             #iiDS                                 Display operating status:
Note:
If the battery voltage is below
                                                                                   • firmware version
6.15 volts, the following displays in                                              • serial number
response to the status command:                                                    • date
WARNING: LOW BATTERY                                                               • time
VOLTAGE!! Replace the batteries                                                    • logging status
before continuing.                                                                 • sample interval time
                                                                                   • number of samples in memory
                                                                                   • available sample space in memory
                                                                                   • whether time is stored with each
                                                                                       sample
                                                                                   • whether sample number is transmitted
                                                                                       when operating command is sent
                                                                                   • A/D cycles to average per sample
                                                                                   • reference pressure
                                                                                   • current temperature

                                                                                   Logging status can be:
                                                                                   • logging not started
                                                                                   • logging data
                                                                                   • not logging: waiting to start at…
                                                                                   • not logging:received stop command
                                                                                   • not logging: low battery
                                                                                   • unknown status

                                                                                   Equivalent to Status button on Toolbar.

                                                         Example: Display status for MicroCAT 01.
                                                         S>#01DS
                                                         SBE37-IM V 2.1 SERIAL NO. 001 0069 07-20-2000 11:55:19
                                                         logging data
                                                         sample interval = 30 seconds
                                                         samplenumber = 52, free = 127948
                                                         store time with each sample
                                                         transmit sample number
                                                         A/D cycles to average = 4
                                                         reference pressure = 0.0 db
                                                         temperature = 7.54 deg C




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                                    Section 4: Deploying and Operating the MicroCAT


                                         Setup Commands
                                         #iiMMDDYY=mmddyy                      Set real-time clock month, day, and year.
Notes:
                                                                               This command must be followed by
1. #iiDDMMYY= and
   #iiMMDDYY= commands are                                                     #iiHHMMSS= command to set time.
   equivalent. Either can be used
   to set the date.                      #iiDDMMYY=ddmmyy                      Set real-time clock day, month, and year.
2. If the MicroCAT battery pack                                                This command must be followed by
   has been removed, the date and                                              #iiHHMMSS= command to set time.
   time must be reset.
3. It is always necessary to set         #iiHHMMSS=hhmmss                      Set real-time clock hour, minute,
   both date and time. If a new                                                and second.
   date is entered but not a new
   time, the new date will not
   be saved.                                          Example: Set current date and time for MicroCAT 01 to
                                                      10 January 2001 12:00:00.
                                                      S>#01MMDDYY=011001
                                                      S>#01HHMMSS=120000

                                                        or

                                                      S>#01DDMMYY=100101
                                                      S>#01HHMMSS=120000


                                         #iiFORMAT=x                           x=1 (default)
                                                                               Output converted data:
                                                                               date format dd mmm yyyy,
Note:                                                                          conductivity =S/m,
See Data Output Formats after                                                  temperature precedes conductivity
these Command Descriptions for
more detail on data formats.                                                   x=2
                                                                               Output converted data:
                                                                               date format mm-dd-yyyy,
                                                                               conductivity=mS/cm,
                                                                               conductivity precedes temperature

                                         #iiREFPRESS=n                         Set reference pressure (gauge) to n
                                                                               decibars. MicroCATs without installed
                                                                               pressure sensors use this reference
                                                                               pressure in conductivity calculation.
Note:                                    #iiQS                                 Quit session and place MicroCAT in
When communicating with
                                                                               quiescent (sleep) mode. Main power is
multiple instruments, use the
                                                                               turned off. Data logging and memory
SIM command PWROFF to send
a power off command to all
                                                                               retention are not affected. Equivalent to
MicroCATs simultaneously. If the                                               PWROFF command, but applies to only
#iiQS command is sent                                                          the specified MicroCAT.
sequentially to each MicroCAT,
activity on the modem link may
wake up a quiescent MicroCAT.




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                                           Section 4: Deploying and Operating the MicroCAT

                                                Logging Commands
                                                Logging commands direct the MicroCAT to sample data at pre-programmed
Note:                                           intervals and store the data in its FLASH memory.
If the MicroCAT is logging data and
the battery voltage is less than                #iiINTERVAL=n                         Set interval between samples to n seconds
6.15 volts for ten consecutive
                                                                                      (10 to 32767). When commanded to start
scans, the MicroCAT halts logging
and sets the logging status to
                                                                                      sampling with #iiSTARTNOW or
low battery.                                                                          #iiSTARTLATER command, MicroCAT
                                                                                      takes a sample, stores data in FLASH
                                                                                      memory, and powers down at
                                                                                      n second intervals.
Note:
Do not send #iiSAMPLENUM=0
                                                #iiSAMPLENUM=n                        Set sample number for first sample when
until all data has been uploaded.
                                                                                      logging begins to n. After all previous data
#iiSAMPLENUM=0 does not delete
the data; it just resets the data                                                     has been uploaded from MicroCAT, set
pointer. If you accidentally send                                                     sample number to zero before starting to
this command before uploading,                                                        log to make entire memory available for
recover the data as follows:                                                          recording. If #iiSAMPLENUM is not
1. Set #iiSAMPLENUM=x, where x is                                                     reset to zero, data will be stored after last
   your estimate of number of samples                                                 recorded sample.
   in memory (estimate based on
   length of deployment and interval
   between samples).                            #iiSTORETIME=x                        x=Y: Store date and time with each
2. Upload data. If x is more than actual                                              sample. This adds four bytes per scan.
   number of samples in memory, data
   for non-existent samples will be bad,                                              x=N: Do not store date and time.
   random data. Review uploaded data
   file carefully and delete any bad            #iiSTARTNOW                           Start data logging now, as defined by
   data.
                                                                                      #iiINTERVAL. Data is stored in
3. If desired, increase x and upload
   data again, to see if there is                                                     FLASH memory.
   additional valid data in memory.
                                                #iiSTARTMMDDYY=mmddyy Set delayed start month, day, and year for
                                                                      data logging, as defined by
                                                                      #iiINTERVAL. This command must be
                                                                      followed by #iiSTARTHHMMSS=
Note:                                                                 command to set delayed start time.
#iiSTARTDDMMYY= and
#iiSTARTMMDDYY= commands                        #iiSTARTDDMMYY=ddmmyy Set delayed start day, month, and year for
are equivalent. Either can be used                                    data logging, as defined by
to set the delayed start time.
                                                                      #iiINTERVAL. This command must be
                                                                      followed by #iiSTARTHHMMSS=
                                                                      command to set delayed start time.

                                                #iiSTARTHHMMSS=hhmmss                 Set delayed start hour, minute, and second
                                                                                      for data logging, as defined by
                                                                                      #iiINTERVAL.

Notes:                                          #iiSTARTLATER                         Start data logging at time set with delayed
1. After receiving                                                                    start date and time commands, as defined
   #iiSTARTLATER, the                                                                 by #iiINTERVAL. Data is stored in
   MicroCAT displays not logging:                                                     FLASH memory.
   waiting to start in reply to the
   Display Status (#iiDS)                                    Example: Program MicroCAT 01 to start logging on
   command. Once logging has                                 20 January 2001 12:00:00.
   started, the #iiDS reply                                  S>#01STARTMMDDYY=012001
   indicates logging data.                                   S>#01STARTHHMMSS=120000
2. If the delayed start time has
                                                             S>#01STARTLATER
   already passed when
   #iiSTARTLATER is received,
   the MicroCAT executes                                       or
   #iiSTARTNOW.                                              S>#01STARTDDMMYY=200101
                                                             S>#01STARTHHMMSS=120000
                                                             S>#01STARTLATER

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                                      Section 4: Deploying and Operating the MicroCAT

                                           Logging Commands (continued)
                                           #iiSTOP                               Stop data logging (which was started with
                                                                                 #iiSTARTNOW or #iiSTARTLATER)
                                                                                 or stop waiting to start logging (if
                                                                                 #iiSTARTLATER was sent but logging
                                                                                 has not begun). Press Connect button on
                                                                                 Toolbar to get an S> prompt before
                                                                                 entering this command. This command
                                                                                 must be sent before uploading data using
                                                                                 Upload button on Toolbar, Upload Data in
                                                                                 Data menu, or #iiDDB,e.

                                           #iiGA                                 Start averaging data. First sample will be
Notes:                                                                           taken after delay of (#iiINTERVAL/2).
1. Averaged data obtained with
   #iiSACG, #iiSARG, #iiSAC, or            #iiSACG                               Output averaged data, converted.
   #iiSAR commands is not stored                                                 Start new average.
   in FLASH memory.
2. Logging commands related to
   averaging are typically used            #iiSARG                               Output averaged data, raw.
   only for customized acquisition.                                              Start new average.
   GDATA and DATAii commands
   more easily start averaging and         #iiSAC                                Output averaged data, converted.
   get averaged data. See                                                        Continue averaging.
   MicroCAT Communication
   Microcontroller Commands                #iiSAR                                Output averaged data, raw.
   for details.                                                                  Continue averaging.


                                           Operating Commands
                                           These commands are used by an external controller to request a sample from
                                           the MicroCAT.

                                           #iiTS                                 Take sample and output converted data.
                                                                                 Data is not stored in FLASH memory.

                                           #iiTSR                                Take sample and output raw data. Data is
                                                                                 not stored in FLASH memory.

                                           #iiSLT                                Output converted data from last sample,
                                                                                 and then take new sample. Data is not
                                                                                 stored in FLASH memory.

                                           #iiSLTR                               Output raw data from last sample, and then
                                                                                 take new sample. Data is not stored in
                                                                                 FLASH memory.

                                           #iiTSSTX                              Take sample, store in FLASH memory,
                                                                                 and transmit converted data. If MicroCAT
                                                                                 is logging or waiting to log when this
                                                                                 command is sent, MicroCAT executes
                                                                                 #iiTS command instead.

                                           #iiSL                                 Output converted data from last sample
                                                                                 taken with either Operating Command or
Note:
                                                                                 data logging (see Logging Commands).
#iiTXSAMPLE=Y could be used to
verify that logging is occurring at the
correct rate. While logging:               #iiTXSAMPLE=x                         x=Y: Output sample number with data
1. Send #iiSL command.                                                           from #iiTS, #iiSLT, #iiTSSTX, and
2. After some interval, send #iiSL                                               #iiSL. Format is: data followed by comma,
   command again. Compare change in                                              space, and six-character sample number.
   output sample numbers to expected
                                                                                 x=N: Do not output sample number.
   change based on #iiINTERVAL.
                                                          36
                                     Section 4: Deploying and Operating the MicroCAT

                                          Data Upload Command
Notes:                                    Send the #iiSTOP command before uploading data.
1. To save data to a file, click
   the Capture button on the              #iiDDb,e                              Upload data beginning with sample b,
   Toolbar before entering the                                                  ending with sample e. First sample is
   #iiDDb,e command.                                                            number one. Maximum of 250 samples
2. See Data Output Formats after                                                can be uploaded at one time with this
   these Command Descriptions.                                                  command. (When Upload button on
3. Use the Upload button on the                                                 Toolbar or Upload Data in Data menu are
   Toolbar or Upload Data in the
                                                                                used, samples numbering more than 250
   Data menu to upload data that
                                                                                are automatically received.)
   will be post-processed by
   SEASOFT. Manually entering                                                   As the data is uploaded, the screen first
   the data upload command does                                                 displays start time =, sample interval =,
   not produce data in the correct                                              and start sample number = .These are
   format for post-processing                                                   the start time, sample interval, and starting
   by SEASOFT.                                                                  sample number for the last set of logged
                                                                                data. This information can be useful in
                                                                                determining what data to review.

                                                      Example: Upload samples 1 through 200 for MicroCAT 01:
                                                      (Click Capture on Toolbar and enter the desired filename in the
                                                      dialog box.)
                                                      S>#01DD1,200



                                          Testing Commands
                                          Data obtained with these commands is not stored in FLASH memory.

                                          #iiSS                                 Output averaged raw data – average,
                                                                                maximum, minimum, and number
                                                                                of samples.

                                          #iiTT                                 Measure temperature for 30 samples,
                                                                                output converted data.

                                          #iiTC                                 Measure conductivity for 30 samples,
                                                                                output converted data.

                                          #iiTP                                 Measure pressure for 30 samples,
                                                                                output converted data.

                                          #iiTTR                                Measure temperature for 30 samples,
                                                                                output raw data.

                                          #iiTCR                                Measure conductivity for 30 samples,
                                                                                output raw data.

                                          #iiTPR                                Measure pressure for 30 samples, output
                                                                                raw data.

                                          #iiTR                                 Measure real-time clock frequency for
                                                                                30 samples, output data.




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                                      Section 4: Deploying and Operating the MicroCAT


                                           Coefficients Command
                                           #iiDC                                 Display calibration coefficients.
Notes:
1. Dates shown are when
                                                                                 Equivalent to Coefficients button
   calibrations were performed.                                                  on Toolbar.
   Calibration coefficients are
   initially factory-set and should
                                                       Example: Display coefficients for MicroCAT 01, which does not
   agree with Calibration                              have a pressure sensor.
   Certificates shipped with                           S>#01DC
   MicroCATs.                                          SBE37-IM V 2.1 0011
2. See individual Coefficient                          temperature:      08-apr-00
   Commands below for definitions                      TA0 = -9.420702e-05
   of the data in the example.                         TA1 = 2.937924e-04
                                                       TA2 = -3.739471e-06
                                                       TA3 = 1.909551e-07
                                                       conductivity:     09-apr-00
                                                       G=                -1.036689e+00
                                                       H=                 1.444342e-01
                                                       I=                -3.112137e-04
                                                       J=                 3.005941e-05
                                                       CPCOR =           -9.570001e-08
                                                       CTCOR =            3.250000e-06
                                                       WBOTC =            1.968100e-05
                                                       rtc:              11-apr-00
                                                       RTCA0 =            9.999782e-01
                                                       RTCA1 =            1.749351e-06
                                                       RTCA2 =            -3.497835e-08



                                           The individual Coefficient Commands listed below are used to modify a
                                           particular coefficient or date:

                                           #iiTCALDATE=S                         Temperature calibration date
Note:                                      #iiTA0=F                              Temperature A0
F = floating point number
                                           #iiTA1=F                               Temperature A1
S = string with no spaces
                                           #iiTA2=F                               Temperature A2
                                           #iiTA3=F                               Temperature A3
                                           #iiCALDATE=S                          Conductivity calibration date
                                           #iiCG=F                               Conductivity G
                                           #iiCH=F                               Conductivity H
                                           #iiCI=F                               Conductivity I
                                           #iiCJ=F                               Conductivity J
                                           #iiWBOTC=F                            Conductivity wbotc
                                           #iiCTCOR=F                            Conductivity ctcor
                                           #iiCPCOR=F                            Conductivity cpcor
                                           #iiPCALDATE=S                         Pressure calibration date
                                           #iiPA0=F                              Pressure A0
                                           #iiPA1=F                              Pressure A1
                                           #iiPA2=F                              Pressure A2
                                           #iiPTCA0=F                            Pressure ptca0
                                           #iiPTCA1=F                            Pressure ptca1
                                           #iiPTCA2=F                            Pressure ptca2
                                           #iiPTCB0=F                            Pressure ptcb0
                                           #iiPTCB1=F                            Pressure ptcb1
                                           #iiPTCB2=F                            Pressure ptcb2
                                           #iiPOFFSET=F                          Pressure offset
                                           #iiRCALDATE=S                         Real-time clock calibration date
                                           #iiRTCA0=F                            Real-time clock A0
                                           #iiRTCA1=F                            Real-time clock A1
                                           #iiRTCA2=F                            Real-time clock A2

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                                          Section 4: Deploying and Operating the MicroCAT


 Data Output Formats
                                               The exact format of the output varies, depending on the command sent and the
                                               user’s selection for the #iiFORMAT= command.

                                               Data Output after Sending Get Data (DATAii) Command
                                               •    #iiFORMAT=1 (default): Conductivity = S/m
Note:
i = MicroCAT ID                                         ii, sssss, ttt.tttt, cc.ccccc, pppp.ppp, dd mmm yyyy, hh:mm:ss, nn
s = MicroCAT serial number
t = temperature                                •    #iiFORMAT=2: Conductivity = mS/cm
    (degrees Celsius, ITS-90)                           ii, sssss, ccc.cccc, ttt.tttt, pppp.ppp, hh:mm:ss, mm-dd-yyyy, nn
c = conductivity
p = pressure (Decibars);
    data sent only if optional pressure        Data Output after Sending Operating Commands
    sensor is installed
hh:mm:ss = hour, minute, second;               (#iiTS, #iiSL, #iiSLT, #iiTSSTX)
    sent only if #iiSTORETIME=Y                •    #iiFORMAT=1 (default): Conductivity = S/m
dd mmm yyyy = day, month, year;                     Temperature, Conductivity, and Pressure
    sent only if #iiSTORETIME=Y                         sssss, ttt.tttt, cc.ccccc, pppp.ppp, sample
mm-dd-yyyy = month, day, year;                      Temperature, Conductivity, Pressure, and Time
    sent only if #iiSTORETIME=Y                         sssss, ttt.tttt, cc.ccccc, pppp.ppp, dd mmm yyyy, hh:mm:ss, sample
n = number of data samples contained
      in average                               •    #iiFORMAT=2: Conductivity = mS/cm
sample = six-digit sample number, sent
                                                    Conductivity, Temperature, and Pressure
      only if #iiTXSAMPLE=Y
                                                        sssss, ccc.cccc, ttt.tttt, pppp.ppp, sample
                                                    Conductivity, Temperature, Pressure, and Time
                                                        sssss, ccc.cccc, ttt.tttt, pppp.ppp, hh:mm:ss, mm-dd-yyyy, sample


                                               Data Output after Sending Data Upload Command
                                               (#iiDDb,e, Upload button on Toolbar, or Upload Data in Data
                                               menu)
                                               •    #iiFORMAT=1 (default): Conductivity = S/m
                                                    Temperature, Conductivity, and Pressure
                                                        ttt.tttt, cc.ccccc, pppp.ppp
                                                    Temperature, Conductivity, Pressure, and Time
                                                        ttt.tttt, cc.ccccc, pppp.ppp, dd mmm yyyy, hh:mm:ss

                                               •    #iiFORMAT=2: Conductivity = mS/cm
                                                    Conductivity, Temperature, and Pressure
                                                        ccc.cccc, ttt.tttt, pppp.ppp
                                                    Conductivity, Temperature, Pressure, and Time
                                                        ccc.cccc, ttt.tttt, pppp.ppp, hh:mm:ss, mm-dd-yyyy




                                                              39
                                       Section 4: Deploying and Operating the MicroCAT


Recovery
                                            Physical Handling
 WARNING!                                   1.   Rinse the conductivity cell with fresh water. (See Section 5: Routine
 Pressure housings may flood                     Maintenance and Calibration for cell cleaning and storage.)
 under pressure due to dirty or
 damaged o-rings, or other failed
                                            2.   Reinsert the protective plugs in the anti-foul cups.
 seals, causing highly compressed
 air to be trapped inside. If this
 happens, a potentially life-               3.   If the batteries are exhausted, new batteries must be installed before the
 threatening explosion can occur                 data can be extracted. Stored data will not be lost as a result of exhaustion
 when the instrument is brought to               or removal of batteries, but the current time and date will have to be re-
 the surface.                                    entered upon redeployment. (See Section 5: Routine Maintenance and
                                                 Calibration for replacement of batteries.)
 If the MicroCAT is unresponsive to
 commands or shows other signs              4.   If immediate redeployment is not required, it is best to leave the
 of flooding or damage, carefully                MicroCAT with batteries in place and in a quiescent state (#iiQS or
 secure the instrument in a location             PWROFF), so that date and time are retained. Because the quiescent
 away from people until it has been              current required is less than 100 microamps, the batteries can be left in
 determined that abnormal internal               place without significant loss of capacity (less than 20% loss
 pressure does not exist.
                                                 per year).
 Contact Sea-Bird for assistance
 with procedures for safely
 relieving internal pressure.




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                                        Section 4: Deploying and Operating the MicroCAT

Note:                                        Uploading Data
Data may be uploaded during                  1.   Double click on SeaTerm.exe. The display shows the main screen.
deployment or after recovery.
If uploading after recovery:
1. Wire the MicroCAT and SIM as
    described in Power and
    Communications Test and Setting
    MicroCAT IDs in Section 3:
    Preparing the MicroCAT for
    Deployment.
2. Set Modem/RS485 ID (on the
    COM Settings tab of the SBE 37
    Configuration Options dialog box)
    to Automatically get ID.
If uploading during deployment: Leave
Modem/RS485 ID on Prompt ID.
SEATERM will prompt you for the
MicroCAT ID when you use Toolbar or          2.   In the Configure menu, select SBE 37. Click on the Upload Settings tab.
menu shortcuts for commands.                      The dialog box looks like this:




             Baud rate for uploading data from
             MicroCAT to computer. For the
             MicroCAT, this is the same as the
             baud rate for general
             communication, which was set on
             the COM Settings tab.



             Defines data upload type when
             using Upload button on Toolbar or
             Upload Data in Data menu:
             • All as single file – All data
               uploaded into one file.
             • By scan number range –
               SEATERM prompts for beginning
               and ending scan (sample)
               numbers, and uploads all data
               within range into one file.



Note:
Set up Upload Settings, Header
Information, and/or Header Form
(Steps 2 through 4):
• The first time you upload data, and             Make the selection for Upload Settings.
• If you want to change upload or
  header parameters.




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                 Section 4: Deploying and Operating the MicroCAT


                       3.     Click on the Header Information tab. The dialog box looks like this:



Defines header
information included with
uploaded data:
• Prompt for header
   information – Each
   time data is uploaded,
   user is prompted to fill
   out user-defined
   header form.
• Include default header
   form in upload file –
   User-defined default
   header form included in
   upload file. User is not
   prompted to add any
   information when data
   is uploaded.
• Don’t include default
   header form in upload
   file – Header
   information not
   included in upload file.




                              Select the desired header information option. Click OK to overwrite an
                              existing configuration file, or click Save As to save the configuration as a
                              new filename.




                                       42
Section 4: Deploying and Operating the MicroCAT


     4.   In the Configure menu, select Header Form to customize the header.
          The dialog box looks like this (default prompts are shown):




          The entries are free form, 0 to 12 lines long. This dialog box establishes:
          • the header prompts that appear for the user to fill in when uploading
              data, if Prompt for header information was selected in the
              Configuration Options dialog box (Step 3)
          • the header included with the uploaded data, if Include default header
              form in upload file was selected in the Configuration Options dialog
              box (Step 3)
          Enter the desired header/header prompts. Click OK.


     5.   Click Connect on the Toolbar to begin communications with the
          MicroCAT. The display looks like this:
               SBE 37 SURFACE MODEM V 2.2
               S>
               Sending wake up tone, wait 4 seconds
               S>
          This shows that correct communications between the computer and the
          SIM has been established, and the SIM has sent the wake-up signal to the
          MicroCAT(s).
          If the system does not respond as shown above:
          • Click Connect again.
          • Check cabling between the computer, the SIM, and the MicroCAT(s).
          • Verify the correct instrument was selected and the COM settings
               were entered correctly in the Configure menu.

     6.   If you have not already done so, command the MicroCAT to stop data
          logging by typing #iiSTOP (ii=MicroCAT ID) and pressing the
          Enter key.




                    43
                                         Section 4: Deploying and Operating the MicroCAT

                                              7.   Display MicroCAT status information by clicking Status on the Toolbar.
                                                   The display looks like this:
                                                   SBE 37-IM V 2.1 SERIAL NO. 0069 07-20-2000 11:55:19
                                                       not logging: received stop command
                                                       sample interval = 20 seconds
                                                       samplenumber = 52, free = 127948
                                                       store time with each sample
                                                       transmit sample number
                                                       A/D cycles to average = 4
                                                       reference pressure = 0.0 db
                                                       temperature =19.48 deg C

                                              8.   Click the Upload button on the Toolbar to upload stored data. SEATERM
                                                   responds as follows:
                                                   A. SEATERM sends the status (#iiDS) command, displays the response,
                                                       and writes the command and response to the upload file. This
                                                       command provides you with information regarding the number of
                                                       samples in memory.
                                                   B. If you selected By scan number range in the Configuration
                                                       Options dialog box (Configure menu) – a dialog box requests the
                                                       range. Enter the desired value(s), and click OK.
                                                   C. SEATERM sends the calibration coefficients (#iiDC) command,
                                                       displays the response, and writes the command and response
                                                       to the upload file. This command displays the MicroCAT’s
                                                       calibration coefficients.
                                                   D. If you selected Prompt for header information in the
                                                       Configuration Options dialog box (Configure menu) – a dialog
                                                       box with the header form appears. Enter the desired header
Notes:                                                 information, and click OK.
To prepare for re-deployment:                      E. In the Open dialog box, enter the desired upload file name and
1. After all data has been                             click OK. The upload file has a .ASC extension.
    uploaded, send the                             F. SEATERM sends the data upload command (#iiDDb,e).
    #iiSAMPLENUM=0 command. If                     G. When the data has been uploaded, SEATERM shows the S> prompt.
    this command is not sent, new
    data will be stored after the last
                                              9.   Ensure all data has been uploaded from the MicroCAT by reviewing
    recorded sample, preventing use
    of the entire memory capacity.                 the data:
2. Do one of the following:                        A. SEATERM contains a utility to convert the .ASC file to a .CNV file
    • Send the #iiQS command to                         that can be used by SEASOFT. To convert the data:
       put the MicroCAT in quiescent                    1) In SEATERM, click the Convert button on the Toolbar.
       (sleep) mode until ready to                           The Convert dialog box appears.
       redeploy. Leaving the                            2) In the dialog box, enter the input (.ASC file) file name and the
       MicroCAT with the batteries in                        desired output (.CNV) file name. Date and time (if present in the
       place and in quiescent mode                           uploaded file) is converted to Julian Day with five significant
       retains the date and time.                            digits. As the default, Convert does not reset the Julian Day to 0
       The quiescent current is only
                                                             when rolling over from December 31 to January 1. Click Start
       10 microamps, so the
       batteries can be left in place
                                                             new year at Julian time 0 to reset the Julian Day to 0 on
       without significant loss                              January 1 if desired.
       of capacity.                                B. Use SEASOFT to process the .CNV data. See the SEASOFT manual
    • Use the #iiSTARTNOW                               for details.
       command to begin logging
       immediately.
    • Set a time and date for
       logging to start using the
       #iiSTARTDATE,
       #iiSTARTTIME, and
       #iiSTARTLATER commands.




                                                             44
                                          Section 5: Routine Maintenance and Calibration




Section 5: Routine Maintenance
and Calibration
                                              This section reviews corrosion precautions, cell storage, sensor calibration,
                                              replacement of batteries, and replacement of anti-foul cylinders. The accuracy
                                              of the MicroCAT is sustained by the care and calibration of the conductivity
                                              sensor and by establishing proper handling practices.



Corrosion Precautions
                                              All exposed metal is titanium; other materials are plastic. No corrosion
                                              precautions are required, but direct electrical connection of the MicroCAT
                                              housing to mooring or other dissimilar metal hardware should be avoided. The
                                              MicroCAT should be rinsed with fresh water after use and prior to storage.



Conductivity Cell Maintenance
                                              The MicroCAT’s conductivity cell is shipped dry to prevent freezing in
 CAUTION:                                     shipping and depletion of the anti-foul cylinders.
 Do not store the MicroCAT with
 water in the conductivity cell.
 Freezing temperatures (for example,
                                              Routine Rinsing after Recovery
 in Arctic environments or during air         After each recovery, rinse the cell with clean de-ionized water, drain and
 shipment) can break the conductivity         gently blow-dry, and re-insert the protective plugs in the anti-foul cups.
 cell if it is full of water.
                                              If the cell is not rinsed between usage, salt crystals may form on the platinized
                                              electrode surfaces. When the instrument is used next, sensor accuracy may be
                                              temporarily affected until these crystals dissolve.

                                              Cleaning
                                              Cell cleaning removes foreign material coating the inside of the cell, partially
 CAUTION:                                     restoring the cell to the original factory calibration. Decide whether to clean
 Do not put a brush or any object             the cell after a deployment based on the following:
 inside the conductivity cell to
 clean it. Putting an object inside the
                                              •    Do not clean the cell if you will be sending the MicroCAT to Sea-Bird
 cell can damage and break the cell.
                                                   for a post-cruise calibration to establish the drift during the cruise.

                                              •    Clean the cell if you will not be performing a post-cruise calibration to
                                                   establish the drift.

                                              Routine Cleaning (inside of cell not visibly dirty)
                                              1. Fill the cell with a 1% solution of Triton X-100 (included with shipment)
                                                 and let it soak for 30 minutes.

                                              2.   Drain and flush with warm, clean, de-ionized water for 1 minute. Then:
                                                   • Prepare for deployment, or
                                                   • If being stored – drain and gently blow-dry, and replace the protective
                                                       plugs in the anti-foul cups.




                                                             45
                                      Section 5: Routine Maintenance and Calibration

                                          Acid Cleaning (visible deposits or marine growth on inside of cell)
                                          Do not clean with acid more than once per week.

CAUTION:
                                          1.   Remove the MicroCAT guard:
Anti-foul cups are attached to the             A. Remove the two screws attaching each anti-foul cup to the guard.
guard and connected with tubing to             B. Remove the four Phillips-head screws attaching the guard to
the cell. Removing the guard                      the housing and sensor end cap.
without disconnecting the cups                 C. Gently lift the guard away.
from the guard will break the cell.
                                          2.   Prepare for cleaning:
                                               A. Remove the small section of Tygon tubing and anti-foul cup from one
                                                   end of the cell.
                                               B. Place a 0.6 m (2 ft) length of 7/16 inch ID, 9/16 inch OD Tygon tubing
                                                   over the end of the cell.
                                               C. Clamp the MicroCAT so that the cell is vertical, with the 0.6 m (2 ft)
                                                   Tygon tubing at the bottom end.
                                               D. Loop the Tygon tubing into a ‘U’ shape, and tape the open end of the
                                                   tubing in place at the same height as the top of the glass cell.

                                          3.   Clean the cell:
WARNING!                                       A. Pour muriatic acid (37% HCl) into the open end of the tubing until
Avoid breathing the acid fumes.                    the cell is nearly filled. Let it soak for 1 to 2 minutes only.
                                               B. Drain the acid from the cell and flush for 5 minutes with warm (not
                                                   hot), clean, de-ionized water.
                                               C. Rinse the exterior of the instrument to remove any spilled acid from
                                                   the surface.
                                               D. Fill the cell with a 1% solution of Triton X-100 (included with
                                                   shipment) and let it stand for 5 minutes.
                                               E. Drain and flush with warm, clean, de-ionized water for 1 minute.
                                               F. Carefully remove the 0.6 m (2 ft) length of Tygon tubing.

                                          4.   Reinstall the anti-foul cup and the guard:
                                               A. Carefully reinstall the small section of Tygon tubing and anti-foul cup
                                                   on the end of the glass cell.
                                               B. Carefully place the guard over the housing, aligning all holes.
                                               C. Reinstall the two screws attaching each anti-foul cup to the guard.
                                               D. Reinstall the four Phillips-head screws attaching the guard to the
                                                   housing and sensor end cap.

                                          5.   Prepare for deployment, or
                                               If being stored – gently blow-dry, and replace the protective plugs in the
                                               anti-foul cups.




                                                         46
                                        Section 5: Routine Maintenance and Calibration


Sensor Calibration
                                            Sea-Bird sensors are calibrated by subjecting them to known physical
                                            conditions and measuring the sensor responses. Coefficients are then
 Notes:                                     computed, which may be used with appropriate algorithms to obtain
 1. Batteries must be removed               engineering units. The conductivity and temperature sensors on the MicroCAT
    before returning the MicroCAT
                                            are supplied fully calibrated, with coefficients printed on their respective
    to Sea-Bird. Do not return used
    batteries to Sea-Bird when              Calibration Certificates (see back of manual). These coefficients have been
    shipping the MicroCAT for               stored in the MicroCAT’s EEPROM.
    recalibration or repair.
 2. Please remove anti-foul                 We recommend that MicroCATs be returned to Sea-Bird for calibration.
    cylinders from the anti-foul cups
    before returning the MicroCAT           Conductivity Sensor Calibration
    to Sea-Bird. Store them for             The conductivity sensor incorporates a fixed precision resistor in parallel with
    future use. See Replacing Anti-
                                            the cell. When the cell is dry and in air, the sensor’s electrical circuitry outputs
    Foul Cylinders for the cylinder
                                            a frequency representative of the fixed resistor. This frequency is recorded on
    removal procedure.
                                            the Calibration Certificate and should remain stable (within 1 Hz) over time.

                                            The primary mechanism for calibration drift in conductivity sensors is the
                                            fouling of the cell by chemical or biological deposits. Fouling changes the cell
                                            geometry, resulting in a shift in cell constant.

                                            Accordingly, the most important determinant of long-term sensor accuracy is
                                            the cleanliness of the cell. We recommend that the conductivity sensors be
                                            calibrated before and after deployment, but particularly when the cell has been
                                            exposed to contamination by oil slicks or biological material.

                                            Temperature Sensor Calibration
                                            The primary source of temperature sensor calibration drift is the aging of the
                                            thermistor element. Sensor drift will usually be a few thousandths of a degree
                                            during the first year, and less in subsequent intervals. Sensor drift is not
                                            substantially dependent upon the environmental conditions of use, and —
                                            unlike platinum or copper elements — the thermistor is insensitive
                                            to shock.

                                            Pressure Sensor (optional) Calibration
                                            The optional strain-gauge pressure sensor is a mechanical diaphragm type,
                                            with an initial static error band of 0.05%. Consequently, the sensor is capable
                                            of meeting MicroCAT’s 0.10% error specification with some allowance for
                                            aging and ambient-temperature induced drift.

                                            For demanding applications, or where the sensor’s air ambient pressure
                                            response has changed significantly, calibration using a dead-weight
                                            generator is recommended. The pressure sensor port uses a 7/16-20 straight
                                            thread for mechanical connection to the pressure source.
                                            (Refer to Application Note 12-1, found on Sea-Bird’s website, for the general
                                            calibration procedure. The pressure sensor port thread size in the Application
                                            Note is not applicable to the MicroCAT.)




                                                           47
                      Section 5: Routine Maintenance and Calibration


Replacing Batteries
                          1.   Remove the modem end cap and battery pack assembly, as described in
                               Installing Batteries in Section 3: Preparing the MicroCAT for
                               Deployment.

                          2.   Remove the upper PCB from the assembly as follows:
                               A. Remove the two small Phillips-head screws and lock washers from
                                  the upper PCB.
                               B. Carefully pry the upper PCB away from the batteries, gently going
                                  around the circle of batteries to avoid bending the banana plugs.

                          3.   Remove the existing batteries and replace with new batteries, banana plug
                               end (+) first. Ensure each battery is fully inserted.

                          4.   Reinstall the upper PCB, replace the battery pack assembly, and reinstall
                               the end cap as described in Installing Batteries in Section 3: Preparing the
                               MicroCAT for Deployment.




                                         48
                                        Section 5: Routine Maintenance and Calibration


Replacing Anti-Foul Cylinders
                                            The MicroCAT has an anti-foul cup and cap on each end of the cell.
 WARNING!
                                            New MicroCATs are shipped with an anti-foul cylinder and a protective
 1. Anti-foul cylinders contain tri-
    butyl tin oxide (TBTO). Handle          plug pre-installed in each cup.
    the cylinders with gloves. If the
    cylinders come in contact with          Anti-foul cylinders have a useful deployment life of approximately 2 years.
    skin, wash with soap and water          Sea-Bird recommends that you keep track of how long the cylinders have been
    immediately. Dispose of gloves          deployed, to allow you to purchase and replace the cylinders when needed.
    properly. Refer to the Material
    Safety Data Sheet, enclosed
    with the shipment, for details.
 2. Anti-foul cylinders are not
    classified by the U.S. DOT or the
    IATA as hazardous material, in
    the quantities used by Sea-Bird.



Cup

                           Cap              Handling the cylinders with gloves, follow this procedure to replace each
                                            anti-foul cylinder (two):

 Plug                                       1.   Remove the protective plug from the anti-foul cup.



                                 Cup        2.   Unscrew the cap with a 5/8-inch socket wrench.
  Cap



                                            3.   Remove the old anti-foul cylinder. If the old cylinder is difficult to
                                                 remove:
                                                 • Use needle-nose pliers and carefully break up material.
                                                 • If necessary, remove the guard to provide easier access.
 CAUTION:
 Anti-foul cups are attached to the
 guard and connected with tubing to the
 cell. Removing the guard without
 disconnecting the cups from the
 guard will break the cell. If the guard
 must be removed:
 1. Remove the two screws connecting
     each anti-foul cup to the guard.       4.   Place the new anti-foul cylinder in the cup.
 2. Remove the four Phillips-head
     screws connecting the guard to the     5.   Rethread the cap onto the cup. Do not over tighten.
     housing and sensor end cap.
 3. Gently lift the guard away.             6.   If the MicroCAT is to be stored, reinstall the protective plug. Note that
                                                 the plugs must be removed prior to deployment or pressurization.
                                                 If the plugs are left in place during deployment, the cell will not
                                                 register conductivity. If left in place during pressurization, the cell
                                                 may be destroyed
 Notes:
 1. Please remove anti-foul cylinders
    from the anti-foul cups before
    returning MicroCATs to Sea-Bird.
 2. Store removed anti-foul cylinders in
    a plastic bag, and keep them in a
    cool place.




                                                           49
                       Glossary




Glossary
           Anti-foul cylinders – Expendable devices saturated with a tri-butyl-tin
           based toxin placed inside the anti-foul cups, located at the ends of the
           conductivity cell.

           Battery pack – Six 9-volt (nominal 1 amp-hour) batteries, each containing
           lithium cells of the type commonly used in cameras. The battery pack also
           includes two small PCBs and a brass sleeve.

           Convert – Toolbar button in SEATERM to convert ASCII (.ASC) data
           uploaded with SEATERM to SEASOFT format (.CNV). When converted to
           .CNV format, the SEASOFT program modules can be used to analyze and
           display data.

           Fouling – Biological growth in the conductivity cell during deployment.

           ICC – Inductive Cable Coupler, which clamps to the insulated mooring cable
           and transfers the inductive signal on wire to the SIM PCB installed inside
           the buoy.

           MicroCAT – High-accuracy conductivity, temperature, and optional pressure
           recorder. Three models are available: SBE 37-IM (Inductive Modem with
           internal battery and memory), SBE 37-SM (Serial interface with internal
           battery and Memory), and SBE 37-SI (Serial Interface only).

           PCB – Printed Circuit Board.

           Scan – One data sample containing temperature, conductivity, and
           optional pressure, and optional date and time.

           SEASOFT – Sea-Bird’s Data Acquisition Software, which calculates and
           displays temperature, conductivity, and optional pressure, and derives
           variables such as salinity and sound velocity.

           SEATERM – Sea-Bird’s WIN 95/98/NT software used to communicate with
           the MicroCAT.

           SIM – Surface Inductive Modem PCB, necessary to interface between
           computer serial port and inductive modem MicroCATs or other
           compatible sensors.

           TCXO – Temperature Compensated Crystal Oscillator.

           Triton X100 – Concentrated liquid non-ionic detergent, used for cleaning the
           conductivity cell.




                        50
                                  Appendix I: Functional Description




Appendix I: Functional Description
Sensors
                                 The MicroCAT embodies the same sensor elements (3-electrode, 2-terminal,
                                 borosilicate glass cell, and pressure-protected thermistor) previously used in
                                 the modular SBE 3 and SBE 4 sensors and in Sea-Bird’s SEACAT family.

                                 The MicroCAT’s optional pressure sensor, developed by Druck, Inc., has a
 Note:
                                 superior new design that is entirely different from conventional ‘silicon’ types
 Pressure ranges are expressed
 in meters of deployment depth   in which the deflection of a metallic diaphragm is detected by epoxy-bonded
 capability.                     silicon strain gauges. The Druck sensor employs a micro-machined silicon
                                 diaphragm into which the strain elements are implanted using semiconductor
                                 fabrication techniques. Unlike metal diaphragms, silicon’s crystal structure is
                                 perfectly elastic, so the sensor is essentially free of pressure hysteresis.
                                 Compensation of the temperature influence on pressure offset and scale is
                                 performed by the MicroCAT’s CPU. The pressure sensor is available in the
                                 following pressure ranges: 20, 100, 350, 1000, 3500, and 7000 meters.

Sensor Interface
                                 Temperature is acquired by applying an AC excitation to a hermetically-sealed
                                 VISHAY reference resistor and an ultra-stable aged thermistor with a drift rate
                                 of less than 0.002°C per year. A 24-bit A/D converter digitizes the outputs of
                                 the reference resistor and thermistor (and optional pressure sensor).
                                 AC excitation and ratiometric comparison using a common processing channel
                                 avoids errors caused by parasitic thermocouples, offset voltages, leakage
                                 currents, and reference errors.

                                 Conductivity is acquired using an ultra-precision Wien Bridge oscillator to
                                 generate a frequency output in response to changes in conductivity. A high-
                                 stability TCXO reference crystal with a drift rate of less than 2 ppm/year is
                                 used to count the frequency from the oscillator.



Real-Time Clock
                                 To minimize battery current drain, a low power watch crystal is used as the
                                 real-time-clock frequency source. Initial error and ambient temperature-
                                 induced drift are compensated by measuring its actual frequency against the
                                 TCXO each time a reading of temperature and conductivity is made during
                                 calibration. The measured discrepancy (if any) is used to arithmetically correct
                                 the low power clock during normal operation.




                                               51
                                         Appendix II: Electronics Disassembly/Reassembly




Appendix II: Electronics
Disassembly/Reassembly
Disassembly
                                              1.   Remove the modem end cap and battery pack following instructions in
                                                   Section 3: Preparing the MicroCAT for Deployment. Do not remove the
                                                   titanium guard!

                                              2.   The electronics are on a sandwich of three rectangular PCBs. These PCBs
                                                   are assembled to a bulkhead that can be seen at the bottom of the battery
                                                   compartment. To remove the PCB assembly:
                                                   A. Use a long screwdriver (#1 screwdriver) to remove the Phillips-head
                                                        screw at the bottom of the battery compartment. The Phillips-head
                                                        screw is a 198mm (7.8 inch) threaded rod with Phillips-head.
                                                   B. Pull out the PCB assembly using the PVC pylon post (post with 3-pin
                                                        Molex connector). The assembly will pull away from the 10-position
                                                        edge connector used to connect to the sensors.



Reassembly
                                              1.   Sight down into the MicroCAT housing to find the hole into which the
                                                   Phillips-head screw threads. The hole is at the bottom of the housing, next
                                                   to the edge connector. The small-diameter brass sleeve between two of the
                                                   PCBs guides the screw into the hole. Align this sleeve with the hole.

                                              2.   Guide the PCB assembly into the housing and push the assembly until the
                                                   edge connector is fully inserted. A gentle resistance can be felt during the
                                                   last 3 mm (1/8 inch) of insertion as the PCB assembly mates to the
 Note:                                             edge connector.
 If the rod will not tighten, the PCBs
 have not fully mated or are mated
                                              3.   Drop the Phillips-head screw into the hole and tighten gently.
 in reverse.
                                              4.   If it is difficult to align the cards, obtain a 305mm (12 in.) length of
 Note:
                                                   6-32 threaded rod.
 Before delivery, desiccant packages               A. Thread the end of this rod into the hole at the bottom of the housing
 are attached to the PCBs with string,                   (next to the edge connector).
 and the electronics chamber is filled             B. Slide the PCB assembly’s small diameter brass sleeve down the rod.
 with dry Argon. These measures help                     The rod will help guide the assembly into the proper position.
 prevent condensation.                             C. Push the assembly until the edge connector is fully inserted.
 If the electronics are exposed to                       After the PCB assembly has been fully inserted, remove the rod.
 the atmosphere, dry gas backfill                  D. Drop the Phillips-head screw into the hole and tighten gently.
 with Argon. If the exposure is for
 more than 12 hours, also replace             5.   Reinstall the battery pack and modem end cap following instructions in
 the desiccant package.
                                                   Section 3: Preparing the MicroCAT for Deployment.
 Battery replacement does not affect
 desiccation of the electronics, as no
 significant gas exchange is possible
 unless the electronics PCBs are
 actually removed from the housing.




                                                            52
                        Appendix III: Command Summary




Appendix III: Command Summary
        FUNCTION       CATEGORY          COMMAND                 DESCRIPTION
        SIM Commands Power on/           PWRON                   Send wakeup tone to all MicroCATs.
                     Power off           PWROFF                  Send power off command to all
                                                                 MicroCATs. MicroCATs enter
                                                                 quiescent (sleep) mode. Main power
                                                                 turned off, but data logging and memory
                                                                 retention unaffected.
                       Firmware          DS                      Display SIM firmware version.
                       version
                       Timeout           DATANNMAX=n             Set timeout (0 - 32767 milliseconds)
                                                                 that applies to DATAii command only;
                                                                 default 1000 milliseconds.
                                         RELAYMAX=n              Set timeout (0 - 32767 seconds)
                                                                 that applies to all other commands;
                                                                 default 20 seconds.
                       Echo              ECHOON                  Echo characters received from computer
                                                                 (default).
                                         ECHOOFF                 Do not echo characters received from
                                                                 computer.
        MicroCAT        Global           GDATA              Command all MicroCAT
        Communication                                       communication microcontrollers to get
        Microcontroller                                     average data from acquisition units and
                                                            start next averaging cycle. MicroCAT
        Commands
                                                            communication microcontrollers hold
                                                            averaged data in a buffer until receiving
                                                            DATAii command.
                                         MMDDYY=mmddyy Set real-time clock month, day, year for
                                                            all MicroCATs. Follow with
                                                            HHMMSS= or it will not set date.
                                         DDMMYY=ddmmyy Set real-time clock day, month, year for
                                                            all MicroCATs. Follow with
                                                            HHMMSS= or it will not set date.
                                         HHMMSS=hhmmss Set real-time clock hour, minute, second
                                                            for all MicroCATs.
                       Get data          DATAii             Get averaged data obtained with
                                                            GDATA command from MicroCAT
                                                            with ID=ii.
                       MicroCAT ID       ID?                Get MicroCAT ID
                                                            (ID=ii, where ii=0 to 99)
                                         *ID=ii             Set MicroCAT ID to ii,
                                         (only one MicroCAT where ii=0 to 99.
                                         can be on line when
                                         setting ID or all       Command must be sent twice, because
                                                                 computer responds by requesting
                                         MicroCATs on line       verification.
                                         will have same ID)
                       MicroCAT          !iiDS                   Display firmware version.
                       communication
                       microcontroller
                       firmware
                       version




                                   53
                Appendix III: Command Summary



FUNCTION        CATEGORY         COMMAND                DESCRIPTION
MicroCAT        Status           #iiDS           Display status.
Acquisition     Setup            #iiMMDDYY=      Set real-time clock month, day, year.
Microcontroller                  mmddyy          Must follow with #iiHHMMSS=.
Commands                         #iiDDMMYY=      Set real-time clock day, month, year.
(ii = MicroCAT                   ddmmyy          Must follow with #iiHHMMSS=.
ID)                              #iiHHMMSS=      Set real-time clock hour, minute,
                                 hhmmss          second.
                                 #iiFORMAT=x     x=1: output converted data, date
                                                 dd mmm yyyy, conductivity=S/m,
                                                 temperature precedes conductivity.
                                                 x=2: output converted data, date mm-
                                                 dd-yyyy, conductivity=mS/cm,
                                                 conductivity precedes temperature.
                                 #iiREFPRESS=n   n= reference pressure (gauge) in
                                                 decibars (used for conductivity
                                                 computation for MicroCAT without
                                                 pressure sensor).
                                 #iiQS           Enter quiescent (sleep) mode. Main
                                                 power turned off, but data logging and
                                                 memory retention unaffected.
                Logging          #iiINTERVAL=n   Set interval between samples to n
                                                 seconds (10 - 32767). When
                                                 commanded to start sampling with
                                                 #iiSTARTNOW or
                                                 #iiSTARTLATER, MicroCAT takes
                                                 sample, stores data in FLASH memory,
                                                 and powers down at n second intervals.
                                 #iiSAMPLENUM=n Set sample number for first sample
                                                 when logging begins to n. After all
                                                 previous data has been uploaded, set to
                                                 zero before starting to log to make entire
                                                 memory available for recording. If not
                                                 reset to zero, data stored after last
                                                 sample.
                                 #iiSTORETIME=x  x=Y: store date and time with each
                                                 sample.
                                                 x=N: do not store date and time.
                                 #iiSTARTNOW     Start logging now, as defined by
                                                 #iiINTERVAL.
                                 #iiSTARTMMDDYY Delayed logging start:
                                 =mmddyy         month, day, year. Must follow with
                                                 #iiSTARTHHMMSS=.
                                 #iiSTARTDDMMYY Delayed logging start:
                                 =ddmmyy         day, month, year. Must follow with
                                                 #iiSTARTHHMMSS=.
                                 #iiSTARTHHMMSS= Delayed logging start:
                                 hhmmss          hour, minute, second.
                                 #iiSTARTLATER   Start logging at delayed logging start
                                                 time, as defined by #iiINTERVAL.
                                 #iiSTOP         Stop logging or stop waiting to start
                                                 logging. Press Connect on Toolbar to
                                                 get S> prompt before entering this
                                                 command. Must send #iiSTOP before
                                                 uploading data.
                                 #iiGA           Start averaging data; take first sample
                                                 after delay of (#iiINTERVAL/2).
                                 #iiSACG         Output averaged converted data.
                                                 Start new average.
                                 #iiSARG         Output averaged raw data.
                                                 Start new average.
                                 #iiSAC          Output averaged converted data.
                                                 Continue averaging.
                                 #iiSAR          Output averaged raw data.
                                                 Continue averaging.

                           54
                                         Appendix III: Command Summary



                       FUNCTION          CATEGORY         COMMAND         DESCRIPTION
                       Continued . . .   Operating        #iiTS           Take sample and output converted data.
                                                                          Data not stored in FLASH memory.
                       Acquisition                        #iiTSR          Take sample and output raw data. Data
                       Microcontroller                                    not stored in FLASH memory.
                                                          #iiSLT          Output converted data from last sample,
                       Commands
                                                                          and then take a new sample. Data not
                       (ii = MicroCAT                                     stored in FLASH memory.
                       ID)                                                Output raw data from last sample, and
                                                          #iiSLTR
                                                                          then take new sample. Data not stored in
                                                                          FLASH memory.
                                                          #iiTSSTX        Take sample, store data in FLASH
                                                                          memory, and output converted data.
                                                          #iiSL           Output converted data from last sample
                                                                          taken with either Operating Command
                                                                          or Logging Commands.
                                                          #iiTXSAMPLE=x   x=Y: Output sample number with data
                                                                          from #iiTS, #iiSLT, #iiTSSTX, and
                                                                          #iiSL. Format is: data followed by
                                                                          comma, space, and six-character
                                                                          sample number.
Note:                                                                     x=N: Do not output sample number.
Use Upload button                        Data Upload      #iiDDb,e        Upload data beginning with
on Toolbar or                                                             scan b, ending with scan e.
Upload Data in Data                                                       Send #iiSTOP before sending
menu to upload                                                            this command.
data that will be                        Testing          #iiSS           Send averaged raw data.
post-processed by                                         #iiTT           Measure temperature for
SEASOFT. Manually                                                         30 samples, output converted data.
entering data upload                                      #iiTC           Measure conductivity for
command does not                                                          30 samples, output converted data.
produce data in                                           #iiTP           Measure pressure for 30 samples, output
correct format for                                                        converted data.
post-processing by                                        #iiTTR          Measure temperature for 30 samples,
SEASOFT.                                                                  output raw data
                                                          #iiTCR          Measure conductivity for 30 samples,
                                                                          output raw data.
                                                          #iiTPR          Measure pressure for 30 samples, output
                                                                          raw data.
                                                          #iiTR           Measure real-time clock frequency for
                                                                          30 samples, output data.




                                                     55
                  Appendix III: Command Summary



FUNCTION          CATEGORY         COMMAND         DESCRIPTION
Continued . . . Coefficients       #iiDC           Display calibration coefficients; all
                (F=floating                        coefficients and dates listed below are
Acquisition     point number;                      included in display. Use individual
                                                   commands below to modify a particular
Microcontroller S=string with no
                                                   coefficient or date.
Commands        spaces)
                                   #iiTCALDATE=S   Temperature calibration date.
(ii = MicroCAT
                                   #iiTA0=F        Temperature A0.
ID)
                                   #iiTA1=F        Temperature A1.
                                   #iiTA2=F        Temperature A2.
                Dates shown        #iiTA3=F        Temperature A3.
                are when           #iiCCALDATE=S   Conductivity calibration date.
                calibrations       #iiCG=F         Conductivity G.
                were performed. #iiCH=F            Conductivity H.
                Calibration        #iiCI=F         Conductivity I.
                coefficients are #iiCJ=F           Conductivity J.
                initially factory- #iiWBOTC=F      Conductivity wbotc.
                set and should     #iiCTCOR=F      Conductivity ctcor.
                agree with         #iiCPCOR=F      Conductivity cpcor.
                Calibration        #iiPCALDATE=S   Pressure calibration date.
                Certificates       #iiPA0=F        Pressure A0.
                shipped with       #iiPA1=F        Pressure A1.
                MicroCATs.         #iiPA2=F        Pressure A2.
                                   #iiPTCA0=F      Pressure ptca0.
                                   #iiPTCA1=F      Pressure ptca1.
                                   #iiPTCA2=F      Pressure ptca2.
                                   #iiPTCB0=F      Pressure ptcb0.
                                   #iiPTCB1=F      Pressure ptcb1.
                                   #iiPTCB2=F      Pressure ptcb2.
                                   #iiPOFFSET=F    Pressure offset.
                                   #iiRCALDATE=S   Real-time clock calibration date.
                                   #iiRTCA0=F      Real-time clock A0.
                                   #iiRTCA1=F      Real-time clock A1.
                                   #iiRTCA2=F      Real-time clock A2.




                             56
                                   Appendix IV: SIM Hook-up and Configuration




Appendix IV:
SIM Hook-up and Configuration
                                                                                                    TR1
    J3


       Pins                                                                                                     JP4
        1
        2                                                                                                       J5
        3

                 JP1
                   J2
                   J1

                   JP2



                                                         J4
                                  Photo shows SIM (SMODEM-2) for use without Inductive Cable Coupler
                                  Standard SIM (SMODEM-1) for use with ICC is similar, but does not include TR1)
                                  Dimensions:
                                  PCB: 109 mm x 147.5 mm (4 1/4 x 5 3/4 inches)
                                  Mounting holes: 90.5 mm x 138.1 mm (3 9/16 x 5 7/16 inches)




Power Connection
                                      The SIM can be configured to power up in either of the following two modes:

                                      •   Normal Power Switching (factory setting) – The SIM runs when power
                                          is applied. Set up the SIM as follows:
                                          1. Connect Power Common to JP1 pin 1.
                                          2. Connect 7-25 VDC to JP1 pin 2.
                                          3. Verify there is no connection to JP1 pin 3.
                                          4. Verify jumper is across J3.

                                      •   Logic Level Controlled Power Switching – Power is always applied to
                                          JP1, pins 1 and 2. Voltage applied to JP1 pin 3 (VCNTL) switches power
 Note:
 If VCNTL < 1 volt, SIM is Off
                                          to the SIM. Set up the SIM as follows:
 (consuming < 100 microamps).             1. Connect Power Common to JP1 pin 1.
 If VCNTL > 2 volts, SIM is On.           2. Connect 7-25 VDC to JP1 pin 2.
                                          3. Remove jumper on J3.




                                                    57
                             Appendix IV: SIM Hook-up and Configuration


Interface Option Connection (J1, J2, and J4)
                                The SIM can be configured to accept RS-232 or RS-485:

  3        2   1                •   RS-232 (factory setting)
                   J2               1. Verify jumper is on J1 pins 2 and 3.
                                    2. Verify jumper is on J2 pins 2 and 3.
                                    3. Remove jumper on J4.

                   J1           •   RS-485
                                    1. Install jumper on J1 pins 1 and 2.
                                    2. Install jumper on J2 pins 1 and 2.
                                    3. Install jumper on J4.



I/O Connector Wiring (JP2)
                                Connect wires to JP2 as follows:

                                •   RS-232
                                    1. Pin 2 – RS-232 transmit from SIM to computer
                                    2. Pin 3 – RS-232 transmit from computer to SIM
                                    3. Pin 5 – Power Common

                                •   RS-485
   9                                1. Pin 4 – RS-485 ‘A’
       1                            2. Pin 5 – Power Common
                                    3. Pin 6 – RS-485 ‘B’




Inductive Mooring Cable Connection (JP4)
                                •   MicroCAT installed with Inductive Cable Coupler (ICC) -
                                    Connect wires from the ICC to JP4.
                                •   MicroCAT installed without Inductive Cable Coupler -
                                    Connect wires from the mooring cable and seawater ground to JP4.



Normal Deployed Operation (J5)
                                •   Normal Deployed Operation – Ensure jumper on J5 is installed.

                                •   Instrument Setup and Lab Testing - Remove jumper on J5.
                                    Removing the jumper on J5 inserts a 1K resistor in series with the
                                    inductive loop, reducing the signal amplitude. This prevents the
                                    MicroCATs in close proximity from responding to commands, which is
                                    especially important when sending the *ID= command.




                                              58
               Appendix V: Replacement Parts




Appendix V: Replacement Parts
              Part   Part                         Application Description         Quantity in
              Number                                                              MicroCAT
              24173     Anti-foul cylinder        Anti-foul poison tubes              2
                                                  inserted into anti-foul cups
              231070    Anti-foul cup             Holds anti-foul cylinder            2
              231505    Anti-foul cap             Secures anti-foul cylinder in       2
                                                  cup
              30984     Anti-foul plug            Seals end of anti-foul              2
                                                  assembly when not deployed
              30900     Machine screw, 1/4-20 x Secures mounting clamp                4
                        2” hex head, titanium
              30633     Washer, 1/4” split ring   For screw 30900 (secures            4
                        lock, titanium            mounting clamp)
              30634     Washer 1/4” flat,         For screw 30900 (secures            4
                        titanium                  mounting clamp)
              31019     O-ring 2-008 N674-70      For screw 30900 (retains            4
                                                  mounting clamp hardware)
              30859     Machine screw, 8-32 x     Secures housing to modem            2
                        3/8” FH, PH, titanium     end cap
              30857     Parker 2-033E515-80       Modem end cap and sensor            4
                        O-ring                    end cap O-ring
              30149     Machine screw, 6-32 x     Secures battery pack                1
                        5/8 PH, stainless steel   assembly to battery pylon
              30243     Washer, #6 split ring     For screw 30149 (secures            1
                        lock, stainless steel     battery pack assembly to
                                                  battery pylon)
              30357     Machine screw, 2-56 x     Secures battery pack’s upper        2
                        1/4 PH, stainless steel   PCB to brass sleeve
              30986     Washer, #2 split ring     For screw 30357 (secures            2
                        lock, stainless steel     battery pack’s upper PCB to
                                                  brass sleeve)
              50243     Battery set (6 sticks)    Power MicroCAT                      1
              50091     Triton X-100              Conductivity cell cleaning          1
                                                  solution
              80677     I/O cable                 From SIM to computer                1
              17130     25-pin to 9-pin adapter   Connects 80677 I/O cable to         1
                                                  9-pin COM port on computer
              60033     Spare hardware/           Assorted hardware and                -
                        O-ring kit                O-rings




                          59
                                                       Index




Index
A                                                              G
About Sea-Bird · 5                                             Glossary · 50
Anti-Foul                                                      Guard
  Cylinder Check · 16                                            Removing · 49
  Cylinder removal before shipping to Sea-Bird · 47
  Plugs · 16                                                   I
  Replacing Cylinders · 49                                     ICC · See Inductive Cable Coupler
Application Notes · See attachments at end of manual           ID
                                                                  Setting · 17
B                                                              Inductive Cable Coupler · 13, 24
Batteries · 10
  Description · 14                                             M
  Endurance · 12                                               Maintenance · 45
  Installing · 14                                              Memory · 10
  Replacing · 48                                               Modes · See Sampling Modes
  Shipping Precautions · 7                                     Mooring Cable · 13
C                                                              O
Calibration · 47                                               Operation Description · 25
  Certificates · See attachments at end of manual
Cleaning · 45                                                  P
Clock · 10
                                                               Parts
Command Summary · 53
                                                                 Replacement · 59
Commands
                                                               Pressure Test
  Coefficients · 38
                                                                 Certificate · See attachments at end of manual
  Data Upload · 37
  Descriptions · 30                                            Q
  Echo · 31
  Get Data · 32                                                Quick Start · 5
  Global · 32
  Logging · 35                                                 R
  MicroCAT Acquisition Microcontroller · 33                    Recovery
  MicroCAT Communication Microcontroller · 32                    Physical Handling · 40
  MicroCAT ID · 32                                               Uploading Data · 41
  Operating · 36                                               Replacement Parts · 59
  Output Format · 34
  Power On/Off · 31                                            S
  Setup · 34                                                   Sample Timing · 12
  SIM Firmware Version · 31                                    Sampling Modes · 26
  Status · 33                                                     Autonomous · 27
  Surface Inductive Modem · 31                                    Averaging · 29
  Testing · 37                                                    Combo · 28
  Timeout · 31                                                    Polled · 26
Communication Defaults · 20                                    Schematics · See attachments at end of manual
Convert .ASC to .CNV · 44                                      SEASOFT · 9, 44
Corrosion Precautions · 45                                     SEATERM · 9, 17, 18, 41
                                                                  Main Screen · 18
D                                                                 Toolbar Buttons · 19
Data Output Format · 34, 39                                    Sensors · 10
Deployment · 23                                                Service Information · See attachment at end of manual
  Preparing for · 14                                           Shipping Precautions · 7
  Setup · 22                                                   SIM · See Surface Inductive Modem
Description · 8                                                Software · 9
Dimensions · 11                                                Specifications · 10
                                                               Storage · 45
E                                                              Surface Inductive Modem
Electronics Disassembly/Reassembly · 52                           Description · 12
                                                                  Wiring · 57
F                                                              System Description · 8
Format
  Data Output · 39
Functional Description · 51

                                                       60
                            Index

T                                   W
Testing · 17                        Warranty · See attachment at end of manual
Timeout Descriptions · 25           Wiring · 24

U
Unpacking MicroCAT · 6
Uploading Data · 41




                            61

				
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