Capacitive Limit Switch Food NCS

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					1                                                              Product	Information	NCS-L-11	/	NCS-L-1


Capacitive	Limit	Switch	Food	NCS-L
                      	
	 Application	/	Specified	Usage	         	 	                   	 	                   	 	 Authorizations	 	
                                                                                                       	                   	 	

· Limit detection of media with low or no water content
  like sirup, fruit concentrates, alcohol and oils.
·

	 Application	Examples	 	 	              	 	                   	 	                   	
                                                                                         	 NCS-L-11/50	and	NCS-L-11/150	
· Limit detection in vessels or tanks with installation from top
· Empty detection in vessels or tanks with installation from bottom,
  insensitive to foam and even extreme product adherences.
· Pump / dry running protection


	 Hygienic	Design	/	Process	Connection	                        	 	

·   Flow optimized, hygienic and easy sterilizable installation by sleeve EMZ-132
·   CIP- / SIP-cleaning up to 150 °C / max. 60 minutes
·   Product contacting materials compliant to FDA
·   Sensor made of stainless steel, sensor tip made of PEEK / stainless steel
·   Additional process connections:
    TriClamp, dairy flange (DIN 11851), DRD, Varivent, APV, BioControl


	 Features	         	 	       	 	        	 	                   	 	

·   Capacitive measuring principle
·   Independent of the conductivity
·   Insensitive to foam and adherence
·   Reliable function at pasty media
·   Very short response time (< 1 s)
·   Defined position of the cable gland
·   Reversible output (full / empty active)
·   Heated electronic to avoid condensation                                                             	
                                                                                         	 Option	KF	and	M1-plug	 	
·   Simulation of sensor status possible


	 Options	/	Accessories	 	 	             	 	                   	 	

·   LED state indicator with inspection window lid
·   NPN output (open collector)
·   M12 plug and matching cable assembly
·   Heating element switched off for temperature range extension


	 Measuring	Principle	        	 	        	 	                   	 	
                                                                                         	 Measuring	principle	            	 	
The capacity of a capacitor is affected by 3 factors: Distance and size	of	the	
electrodes as well as the kind	of	medium between the electrodes. Using the
capacitive sensors only the kind of medium is of interest.

The electrode of the sensor and surface of tank can be seen as capacitor,
the medium as dielectric fluid. Caused by the higher Dk-value of the medium
compared to air the capacity increases if the sensor is covered with the me-             Vessel- /
dium. The change of capacity is evaluated by electronics and converted into              pipe wall
a corresponding switching order. This functional principle requires that the
sensor tip is covered with medium. That way the sensor is insensitive to foam            Medium
and adherences.
                                                                                                     Electric flux lines




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	 Specification                                                                                                                                       

	 Specification	 	 	                              	 	        	 	             	 	                                         	 	        	 	   	 	         	

    Process	Connection	                           	 thread                     G1/2" CLEANadapt combined with Negele weld-in
                                                                               sleeves, build-in systems, adapter sleeves
                                                    tightening torque          max. 5...10 Nm

    Materials                                       connection head            stainless steel 1.4305 (303)
                                                    connection piece           stainless steel 1.4305 (303)
                                                    coupling piece             PEEK
                                                    sensor tip                 stainless steel 1.4404 (316L)

    Weight                                                                     ca. 500 g

    Operating	Pressure                                                         max. 10 bar

    Protection	Class                                                           IP69K (with electrical connection M12-plug)

    Electrical	Connection                           cable gland                M16 x 1,5 (PG)
                                                    cable connection           M12-plug 1.4305 (303)

    Supply                                                                     16...32 V DC (see graphic)

    Output                                                                     PNP (active 50 mA, short-circuit-proof)
                                                    optional                   NPN (active 50 mA, short-circuit-proof)

    Switching	Function                              adjustable by polarity     high active (sensor wetted: ‘high’)
                                                    of supply                  low active (sensor free: ‘high’)

    Status	Display                                                             LED

    Transmission	Power                              measuring signal           < 1 mW

    Measuring	Range	                              	 standard NCS-L-11          Dk ≥ 20
                                                    enhanced NCS-L-12          Dk ≥ 2

    Switching	Accuracy	                           	 at watery media and        maximum required insertion depth 5 mm
                                                    switch setting 2

    Switching	Threshold                             standard NCS-L-11          threshold stepwise adjustable Dk = 20 ... Dk = 70
                                                    enhanced NCS-L-12          threshold stepwise adjustable Dk = 2 ... Dk = 20
                                                                               external switchable to Dk = 50 fixed


	 Temperature	Range	                              	 	        	 	               	 Supply	/	Power	Input	                              	 	   	 	
                                   160
                                                                                                               250
         Medium	temperature	[°C]




                                                                                         Supply	current	[mA]




                                   140
                                                                                                               200


                                   120

                                                                                                               150

                                   100


                                                                                                               100
                                    80


                                                                                                                50
                                    60



                                    40                                                                           0
                                         0   20         40     60       80                                           0         40          80   120


                   Ambient	temperature	[°C]                                                                     Time	[s]
	   	                	 	      	 	       	 	                                    	   	                	 	        	 	       	 	
	   	         Continuous	temperature	limit	with heater                         	   	       U
                                                                                           	 b	=	4	V,	Tu	=	0	°C
	   	         Temperature	excursion	(60	min) with heater                       	   	       	 b	=	33	V,	Tu	=	-15	°C
                                                                                           U
	   	         Continuous	temperature	limit without heater	 	                   	   	
	   	         Temperature	excursion	(60	min) without heater                                Ub: Supply voltage
                                                                                           Tu: Ambient temperature




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3                                                                                           Dimensioned	Drawings

	 NCS-L-11/X	with	EMZ-13	 	                             	 	      	 NCS-L-1/50	with	EMZ-13	              	 	
    Insertion length: see order informations on page 8




                                                                  	 Belated	Shortage	of	Sensor	Rod	 	 	

                                                                    Sensor length can be shortened by up to 50 mm.
                                                                    Immersion length can vary slightly after cut down.

                                                                    In order to comply with the specified switching accura-
                                                                    cy we recommend to order factory calibrated sensors
                                                                    with the required length.




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	 Installation                                                                                                                  4


	 Conventional	Usage	         	 	        	 	                   	 	                   	 	        	 	        	 	                  	

 · Not suitable for applications in explosive areas.

 · Not suitable for applications in security-relevant equipments (SIL).



	 Mechanical	Connection	/	Installation	                        	 	                   	 	        	 	        	 	                  	

 · Use Negele CLEANadapt system for safe operation of measuring point!

 · Attention: The maximum tightening torque for mounting is 10 Nm!

 · Use a welding mandril for correct installation of CLEANadapt weld-in fittings. Please pay attention to the weld-in
   and installation details in the CLEANadapt product information (chapter one).

 · Do not use non-conducting sealants such as PTFE (Teflon) or similar.




	 Electrical	Connection	 	 	             	 	                   	 	                   	 	        	 	        	 	                  	

NCS-L-11	high	active	      	                                      NCS-L-1	high	active
Switch the sensor to low active by reversing the polarity         Switch the sensor to low active by reversing the polarity
of power supply.                                                  of power supply.

		                 	 	        	 Config.	strip	terminal                                             Config.	strip	terminal
	
                                 1: + 24 V DC                                                      1: Control input
                                 2: 0 V                                                            2: + 24 V DC
                                 3: Output                                                         3: 0 V
                                                                                                   4: Output


		                 	 	        	 Config.	M1-plug	                 		                 	 	        	 Config.	M1-plug

                                 1: + 24 V DC                                                      1: + 24 V DC
                                 3: 0 V                                                            2: Control input
                                 4: Output                                                         3: 0 V
                                                                                                   4: Output



	 Notes	           	 	        	 	        	 	                   	 	                   	 	        	 	        	 	                  	




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5                                                                                                              Installation


	 Handling	/	Operation	        	 	       	 	                    	 	                     	 Electronics	NCS-L-1

 With the control input, the threshold of the limit switches with enhan-
 ced measurement range can be switched to threshold of Dk = 50 while
 operating.

 This could be useful to avoid false alarm at process steps with increasing
 frothing, CIP-cycles or similar.




               Control input                              Threshold
           0 V or not connected                 like setting with rotaty switch
                                                                                            LEDs               Rotary switch
                 + 24 V DC                                Dk = 50 fix



    LED status display                                                                  Showcase of media and specific
                                                                                        Dk-value:
                                                NCS-L-1	           NCS-L-1	           (the exemplarily Dk-values can vary
     Sensor	Tip          NCS-L-11
                                               normal mode        switched mode         acc. to different outside influences
                                                                                        like temperature, fabrication, source
                                                                                        etc.)
       covered
                                                                                                   Medium            Dk-value
     not	covered                                                                         water                           81
                                                                                         methanol                        33

Adjustment	of	threshold	with	rotary	switch                                               water
                                                                                                                         29
                                                                                         (demineralized)
At NCS-L-11                                 At NCS-L-12
                                                                                         ethanol                         25
    Switch setting        Dk-value             Switch setting           Dk-value         honey, ketchup,
                                                                                                                         24
          0              Output off                   0               Output off         mustard

          1              Output on                    1               Output on          acetone                         21
          2                    20                     2                    2             skin cream                      19
          3                    25                     3                    3             toothpaste                      18
          4                    30                     4                    4             draff (residual mois-
                                                                                                                         7
          5                    35                     5                    5             ture 20 %)

          6                    40                     6                   10             butter                          6
          7                    50                     7                   12             milkfat                         4
          8                    60                     8                   15             chocolate                       3
          9                    70                     9                   20             vegetable oil                   2

Example

At switch setting 5 (Dk = 35) the NCS-L-11 will detect media with a dielectric
constant of Dk ≥ 35.




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	 Important	Information                                                                                                         6


	 Cleaning	/	Maintenance		 	             	 	                      	 Transport	/	Storage	        	 	        	 	

 · In case of using pressure washers, dont‘t point nozzle            ·   No outdoor storage
   directly to electrical connections!                               ·   Dry and dust free
                                                                     ·   Not exposed to corrosive media
                                                                     ·   Protected against solar radiation
                                                                     ·   Avoiding mechanical shock and vibration
                                                                     ·   Storage temperature 0...40 °C
	 Reshipment	      	 	        	 	        	 	                         ·   Relative humidity max. 80 %

 · Sensors shall be clean and must not be contaminated
   with dangerous media!
 · Use suitable transport packaging only to avoid                 	 Standards	and	Guidelines	 	            	 	
   damage of the equipment!
                                                                     · You have to comply with applicable regulations and
                                                                       directives.


	 Advice	to	Conformity	       	 	        	 	
                                                                  	 Disposal	         	 	       	 	        	 	
 · Applicable guidelines:
   Electromagnetic compatibility 2004/108/EG                         · This instrument is not subject to the WEEE directive
 · The accordance with applicable EU-guidelines is                     2002/96/EG and the respective national laws.
   confirmed with CE-labeling of the device.                         · Pass the instrument directly on to a specialised
 · You have to guarantee the compliance of all guidelines              recycling company and do not use the municipal
   applicable for the entire equipement.                               collecting points.




	 Build-In	Schema	 	          	 	        	 	                   	 	                    	 	       	 	        	 	                  	




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7                                                                                    Process	Connections	G1/"


    Overview	of	further	possible	process	connections (adapter must be ordered separately!)
    The complete overview of all available adapters you will find at product information CLEANadapt in chapter 1.

    NCS-L




       Process	            Negele               Negele                Negele
                                                                                         Collar	sleeve        Dummy	fl	ange
      connection        weld-in	sleeve       weld-in	sleeve        weld-in	sleeve

         DN15              EMZ-13              EMS-13               EMZ-131               EMK-13               BST-130
         DN5
         DN40
         DN50             suitable for         suitable for       suitable for     suitable for               to close existing
                         installation in      installation in pipes and vessels thick-walled ves-              measurement
         DN65               vessels          pulled-out pipes with leackage hole       sels                         points
         DN0
        DN100



    Overview	of	further	possible	process	connections (adapter must be ordered separately!)

    NCS-L                                                                                                                  




       Process	                                                     Dairy	fl	ange       Vibration	switch	 Vibration	switch	
                         Weld-in	ball           TriClamp
      connection                                                      (DIN 11851)          adapter           adapter

         DN15              KEM-13           AMC-13/DN15                  -                AMG-13           AMG-13/3/4"
         DN5                                AMC-13/DN5         AMK-13/DN5
         DN40                                AMC-13/DN5         AMK-13/DN40
                          suitable for
         DN50                                AMC-13/DN50         AMK-13/DN50               adapter              adapter
                         installation in
                                                                                           G1" to G1/2"        G3/4" to G1/2"
         DN65            bent tubes or               -            AMK-13/DN65              hygienic             hygienic
                            vessels
         DN0                                        -                     -
        DN100                                        -                     -


Notice
Further adapters on request: SMS, RJT, IDF, flanges according to DIN and ISO.




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	 Product	Information	NCS-L-11	/	NCS-L-1                                                                                                        


	 Order	Code	              	 	           	 	         	 	                 	 	                	 	        	 	            	 	                        	

	 NCS-L-11                        (process connection CLEANadapt G1/2" hygienic;
                                  version with standard measurement range for watery media with Dk ≥ 20)
  NCS-L-1	                       (process connection CLEANadapt G1/2" hygienic;
                                  version with enhanced measurement range for critical media with Dk ≥ 2 (e.g. Oil, Fat, …))
		             	                  Attention:	Only	for	buil-in	length	50	mm	available!

                                  Insertion	Length (only selectable at NCS-L-11)
                                  50	       (insertion length 50 mm)
                                  100       (insertion length 100 mm)
                                  150	      (insertion length 150 mm)
		             	                  00	      (insertion length 200 mm)
		             	                  50	      (insertion length 250 mm)
                                  xxx       special length (only between 60...250 mm selectable!)
		             	                  	         Please	pay	attention	to	the	advices	for	belated	shortening	the	rods	on	page	3!

                                            Output
                                            PNP	       (standard, active 24 V DC)
                                            NPN        (NPN)

                                                       Temperature	Version	(see diagram on page 2)
                                                       X	 (standard, for process temperatures up to 100 °C, CIP/SIP 150 °C / 60 min)
                                                       D (heater deactivated at higher ambient temperature)

		                         	 	           	 	         	 	   Status-LED
                                                           X	 (without)
                                                           KF (window in the lid, LED visible from outside)

		             	                  	         	          	         Electrical	Connection
                                                                 X	         (cable gland M16x1,5)
                                                                 M1	       (M12-plug)



	 NCS-L-11							/		 150			/	               PNP				/	 X		/		KF	/		M1	     	         	         	           	              	              	       	



	 Notes	                   	 	           	 	         	 	                 	 	                	 	        	 	            	 	                        	




05.10.09 / 1.3 / Gie / at-ac.de                                                                      All data subject to change and errors excluded.




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