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Singel-channel meter of signal from thermo- resistive sensors CL 371

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Singel-channel meter of signal from thermo- resistive sensors CL 371 Powered By Docstoc
					Singel-channel meter of signal from thermo-
resistive sensors CL 371

•   Singel-channel temperature measurement
•   Co-operation with one temperature sensor
•   Several additional functions
•   Possible communication with computer


The CL 371 meter has been designed for temperature measurement using thermo-resistors. It can be
attached directly one temperature sensor (e.g. Pt 100, Ni 100) to the meter.

The CL 371 has an integrated primary control program. The user can modify its parameters, which are
stored in an EE-PROM memory. The trip-out of voltage doesn’t result in loosing data. The program allows
to take cyclic measurement of signal on meter’s input and its presentation on the display.

The conversion parameters defined by User for measured signal allow to indicate the real values of
physical quantities.
The program allows to find minimum and maximum values and can signalize exceeding of eight
comparison thresholds. The device can be optionally equipped with two in series connections RS 485 /
RS 232 to transfer measurement results to other devices or computer systems.

Additional functions:
- averaging
- minimum and maximum measurement
- tare
- comparation
- correction of nonlinearity in transducers characteristic (up to 23 points)


Specifications:
Number of measuring channels                       1
Resolution of a/d converter                        min. 50000 graduations + sign
Nonlinearity of a/d converter                      < 0,0015 %
Measurement time for one channel                   0,1 ÷ 0,5s
Compression of range                               0,001 ÷ 1,5
Type of averaging                                 arithmetic mean from 1 ÷ 50 measurements
Additional functions                              minimum and maximum measurement,
                                                  tare, comparation,
                                                  correction of nonlinearity (up to 23 points)
Tare                                               0 ÷ 100 % of nominal value
Bias                                               automatic
LED Display                                        6 digits + 2 digits for number of function,
                                                   4 information leds, 4 illumination leds
Maximal indicated value                            ± 99999
Meter CL 371 ________________________________________________

Digits hight                                  10 mm (measurement result),
                                              7 mm (number of function)
Digits colour                                 yellow
Analog inputs
— voltage                                     ± 0,01 V up to ± 20 V*
Insulation voltage for analog inputs          > 500 V
Communication outputs (optionally)            2 independent (one to other devices and second
                                              to PC or PLC)*
— standard                                    RS485 (or RS232 for PC)*
— parameters of transmission                  4800 / 9600 bps, 8 data bits, 2 stop bits without parity
Insulation voltage for connectors             > 500 V
Number of comparation treshholds              8 (optionaly dedicated to channels and relays)
Output for comparation systems (optionally)       4 pcs — relay C-NO (50 V / 0,5 A)
Analog current output (optionally)
Output current range                          from 0 up to 24 mA (0…20 mA, 4…20 mA)
Loading resistance                            < 500 Ω
Maximal error                                 < 0,015 % of range
Output impedance                              25 MΩ
Assignation to the measuring channel          programmable by User
Resolver of measurements into current         programmable by User
Current output updating                       after each measurement
Number of timers                              from 0 up to 3 (programmable by User)
Timers’ resolution                            1s
Maximal indicated time                        99h 59min 59s
Start / stop / timer erasing                  manually from keyboard
Additionally TTL inputs (option)              4 pcs. (pulling up resistor 22 kΩ to +5 V)
Supply
— voltage                                     12 V or 24 Vdc (±10 %)
— current                                     < 200 mA (for version 24V)
                                              < 400 mA (for version 12V)
Operating temperature range                   0 ÷ 50ºC (273 ÷ 323 K)
Relative humidity                             20 ÷ 80 %
Dimensions                                    96 × 48 × 190 mm




Manufacturer_________________________________________________________________
Zakład Elektroniki Pomiarowej Wielkości Nieelektrycznych, Poland, 05-270 Marki, ul. Kołłątaja 8
Tel./fax: (004822) 7812169, 7712411, e-mail: zepwn@zepwn.com.pl, http://www.zepwn.com.pl

				
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posted:8/24/2011
language:English
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