Campbell CS240 Product Manual
  1. Manuals
  2. Brands
  3. Campbell Manuals
  4. Control Unit
  5. CS240
  6. Product manual

Campbell CS240 Product Manual

Pt-1000 class a, back-of-module temperature sensors
Hide thumbs Also See for CS240:
Table of Contents

Advertisement

Quick Links

Download this manual
Revision: 05/2021
Copyright © 2017 – 2021
Campbell Scientific
CSL I.D - 1209

Advertisement

Table of Contents
loading

Related Manuals for Campbell CS240

Summary of Contents for Campbell CS240

  • Page 1 Revision: 05/2021 Copyright © 2017 – 2021 Campbell Scientific CSL I.D - 1209...
  • Page 2 Quotations for repairs can be given on request. It is the policy of Campbell Scientific to protect the health of its employees and provide a safe working environment, in support of this policy a “Declaration of Hazardous Material and Decontamination”...
  • Page 3 About this manual Please note that this manual was originally produced by Campbell Scientific Inc. primarily for the North American market. Some spellings, weights and measures may reflect this origin. Some useful conversion factors: Area: 1 in (square inch) = 645 mm Mass: 1 oz.
  • Page 4 • Periodically (at least yearly) check electrical ground connections. WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION, USE, OR MAINTENANCE OF TRIPODS, TOWERS, OR ATTACHMENTS TO TRIPODS AND TOWERS...

  • Page 5: Table Of Contents

    7.4.3 Strain relief of CS240DM analogue-to-digital module 8. Operation 8.1 Electrical noisy environments 8.2 Long cable lengths 8.2.1 CS240 cable resistance/long cable lengths 8.2.2 CS240DM long cable lengths 8.3 Modbus register map 8.4 CS240DM and Device Configuration Utility 9. Maintenance and troubleshooting 9.1 Maintenance...
  • Page 6 9.2 Troubleshooting Appendix A. Importing Short Cut code into CRBasic Editor Appendix B. Example programs B.1 CS240 two-wire configuration programs B.2 CS240 four-wire configuration programs B.3 CS240DM program Appendix C. Sensor material properties C.1 3M F9473PC adhesive Table of Contents - ii...

  • Page 7: Introduction

    (PV) module temperature but also can be used to measure the surface temperature of other devices. The CS240 can be measured with a 2-wire or 4-wire configuration and is compatible with most Campbell Scientific data loggers. The CS240DM has a digital RS-485 output that can be directly read by a MeteoPV, CR6, CR1000X, or Modbus RTU RS-485 network.

  • Page 8: Initial Inspection

    1. Open Short Cut and click Create New Program. 2. Double-click the data logger model. 3. In the Available Sensors and Devices box, type CS240. You can also locate the sensor in the Sensors > Temperature folder. Double click the sensor model. The surface temperature defaults to degree C.
  • Page 9  4. Click on the Wiring tab to see how the sensor is to be wired to the data logger. Click OK after wiring the sensor.  5. Repeat steps three and four for other sensors you want to measure. Click Next. CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     3...
  • Page 10  9. If the sensor is connected to the data logger, check the output of the sensor in the data logger support software data display in LoggerNet, RTDAQ, or PC400 to make sure it is making reasonable measurements. CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     4...

  • Page 11: Overview

    5. Overview The CS240 and CS240DM are surface mountable platinum resistive thermometers (PRT) that measure back-of-module temperature for solar energy applications. They use a precision PT-1000 Class A PRT to provide the highest level of accuracy. To withstand the harsh treatment...

  • Page 12: Specifications

    Rugged design holds up in harsh conditions and conduit installations Self-adhesive backing for easy mounting lasts decades CS240 has 2-wire or 4-wire configurations to satisfy accuracy even at long cable lengths CS240 compatible with Campbell Scientific CRBasic data loggers: CR6, CR3000, CR1000X,...
  • Page 13 Industrial Design (IEC Class 4) (according to IEC 751) Cable Black semi-gloss PVC, UL VW-1 sunlight resistant for Jacket material: outdoor use 24 AWG (7/32) tinned copper Wire size and type: 0.61 mm (0.024 in) Nominal wire diameter: CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     7...

  • Page 14: Installation

    7.4 Mounting/cable strain relief 7.1 Wiring FIGURE 7-1 (p. 9) provides the circuit diagram for the CS240 2-wire configuration. FIGURE 7-2 9) provides the circuit diagram for the CS240DM or the CS240 4-wire configuration. CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     8...

  • Page 15: Cs240-To-Data-Logger Wiring

    The 4-wire configuration eliminates resistance due to cable length and is the most accurate way to measure this sensor. The CS240 is shipped ready for the 2-wire configuration. The wires used only for the 4-wire configuration are taped to the side of the cable.

  • Page 16: Cs240Dm Wiring

    Table 7-1: Wire colour, function, and data logger connection for the CS240 2-wire configuration Wire colour Wire function Data logger connection terminals Voltage excitation U configured for voltage excitation Black input EX, VX (voltage excitation) U configured for single-ended analogue input...

  • Page 17: Data Logger Programming

    Complete program examples for select CRBasic data loggers can be found in Example programs (p. 23) If applicable, please read Electrical noisy environments (p. 16) and Long cable lengths (p. 16) prior to programming your data logger. CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     11...

  • Page 18: Cs240 Programming

    7.2.1 CS240 programming The CS240 program needs to measure the resistance of the CS240 then convert that resistance measurement to temperature. 7.2.1.1 Resistance measurement CRBasic instructions used to measure resistance are the (4-wire configuration) or BrHalf4W (2-wire configuration). The instruction reduces cable errors, and the...

  • Page 19: Placement On A Photovoltaic (Pv) Module

    PV module. 7.4 Mounting/cable strain relief CAUTION: Before mounting, the installers need to wash their hands and then clean the back of the PV module or other device with ethyl alcohol. CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     13...

  • Page 20: Adhesive Mounting Strip

    5. Place the two other strips of tape on the ends of the sensor disk, perpendicular to the first piece of tape and parallel to the cable then rub the tape surface into the module surface. FIGURE 7-4 (p. 15). CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     14...
  • Page 21 FIGURE 7-3. Strain relief label on the cable FIGURE 7-4. Proper tape usage CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     15...

  • Page 22: Strain Relief Of Cs240Dm Analogue-To-Digital Module

    AC power lines, pumps, power inverters, and motors can be the source of electrical noise. If the CS240 sensor or data logger is located in an electrically noisy environment, the CS240 sensor should be measured with the 60 or 50 Hz rejection option.

  • Page 23: Cs240Dm Long Cable Lengths

    FIGURE 8-1. BrHalf (2-wire half bridge) measurement error as a function of cable length The heat shrink label on the CS240 cable provides the cable resistance (ohms). When using the 2-wire configuration, subtract this cable resistance from the measured resistance value. The value included on the label is calculated with the following equation: Cable resistance = 0.0274 ohm/feet x cable length (in feet)

  • Page 24: Modbus Register Map

    Follow these guidelines when using long cables: Use low capacitance, low resistance, screened cable (as fitted by Campbell Scientific) to reach distances of several hundred metres. Ensure that the power ground cable has low resistance and is connected to the same ground reference as the data logger control terminals.

  • Page 25: Cs240Dm And Device Configuration Utility

    Unsigned short data is a 16-bit positive integer. 8.4 CS240DM and Device Configuration Utility Device Configuration Utility i s bundled in Campbell Scientific data logger support software and can also be acquired, at no cost, from www.campbellsci.eu/downloads. Device Configuration Utility can be used to change the CS240DM settings, view stored values, and update the CS240DM operating system (OS).
  • Page 26 The settings are changed in the Holding Registers tab. Except for the Modbus Address, the default values are typical for most Modbus systems and therefore rarely need to be changed. The values stored are shown in the Input Registers tab. CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     20...

  • Page 27: Maintenance And Troubleshooting

    Symptom: Unstable Temperature Make sure the clear shield wire is connected to data logger ground, and the data logger is properly grounded. For the CS240, try using the 60 or 50 Hz integration options and/or increasing the settling time. CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature...

  • Page 28: Appendix A. Importing Short Cut Code Into Crbasic Editor

    Block. This adds an apostrophe (') to the beginning of each of the highlighted lines, which instructs the data logger compiler to ignore those lines when compiling. The Comment Block feature is demonstrated at about 5:10 in the CRBasic | Features video CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     22...

  • Page 29: Appendix B. Example Programs

    (p. 23) provides wiring for the CS240 four-wire configuration programs (p. 28), and Table B-3 (p. 24) provides wiring for the CS240DM program (p. 31). Table B-1: Wiring for CS240 2-wire configuration example programs CR1000X Wire colour Wire function CR300 terminals CR6 terminals terminals...

  • Page 30: Cs240 Two-Wire Configuration Programs

      Sample(1,CS240T_C,FP2) EndTable 'Main Program BeginProg  'Main Scan  Scan(5,Sec,1,0)  'CS240 (2-wire) Class A RTD Back of PV Module Temperature Sensor  'measurement 'CS240T_C'  BrHalf(CS240X,1,mV2500,1,Vx1,1,350,True,0,60,1,0)  'Convert ratio to ohms and remove cable resistance  CS240Rs=CS240X*(1000+0.274)/(1-CS240X)-0.274 CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     24...
  • Page 31 CRBasic Example 1: CR300 2-wire configuration for measuring the CS240     'Calculate temperature from resistance     PRTCalc(CS240T_C,1,CS240Rs/1000,1,1,0)       'Call Data Tables and Store Data     CallTable Hourly   NextScan EndProg CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     25...
  • Page 32   DataInterval(0,60,Min,10)   Sample(1,CS240T_C,FP2) EndTable   'Main Program BeginProg   'Main Scan   Scan(5,Sec,1,0)     'CS240 (2-wire) Class A RTD Back of PV Module Temperature Sensor     'measurement 'CS240T_C'     BrHalf(CS240X,1,mV200,U2,U1,1,350,True,0,60,1,0)       'Convert ratio to ohms and remove cable resistance     CS240Rs=CS240X*(1000+0.274)/(1-CS240X)-0.274       'Calculate temperature from resistance     PRTCalc(CS240T_C,1,CS240Rs/1000,1,1,0)  ...
  • Page 33   DataInterval(0,60,Min,10)   Sample(1,CS240T_C,FP2) EndTable   'Main Program BeginProg   'Main Scan   Scan(5,Sec,1,0)     'CS240 (2-wire) Class A RTD Back of PV Module Temperature Sensor     'measurement 'CS240T_C'     BrHalf(CS240X,1,mV200,1,Vx1,1,350,True,0,60,1,0)       'Convert ratio to ohms and remove cable resistance     CS240Rs=CS240X*(1000+0.274)/(1-CS240X)-0.274       'Calculate temperature from resistance     PRTCalc(CS240T_C,1,CS240Rs/1000,1,1,0)  ...

  • Page 34: Cs240 Four-Wire Configuration Programs

    'Define Data Tables DataTable(Hourly,True,-1)   DataInterval(0,60,Min,10)   Sample(1,CS240T_C,FP2) EndTable   'Main Program BeginProg   'Main Scan   Scan(5,Sec,1,0)     'CS240 (4-wire) Class A RTD Back of PV Module Temperature Sensor     'measurement 'CS240T_C'     BrHalf4W(CS240X,1,mV2500,mV2500,1,Vx1,1,350,True,True,0,60,1,0)       'Convert ratio to ohms     CS240Rs=CS240X*1000       'Calculate temperature from resistance     PRTCalc(CS240T_C,1,CS240Rs/1000,1,1,0)  ...
  • Page 35 'Define Data Tables DataTable(Hourly,True,-1)   DataInterval(0,60,Min,10)   Sample(1,CS240T_C,FP2) EndTable   'Main Program BeginProg   'Main Scan   Scan(5,Sec,1,0)     'CS240 (4-wire) Class A RTD Back of PV Module Temperature Sensor     'measurement 'CS240T_C'     BrHalf4W(CS240X,1,mV200,mV200,U3,U1,1,350,True,True,0,60,1,0)       'Convert ratio to ohms     CS240Rs=CS240X*1000       'Calculate temperature from resistance     PRTCalc(CS240T_C,1,CS240Rs/1000,1,1,0)  ...
  • Page 36 'Define Data Tables DataTable(Hourly,True,-1)   DataInterval(0,60,Min,10)   Sample(1,CS240T_C,FP2) EndTable   'Main Program BeginProg   'Main Scan   Scan(5,Sec,1,0)     'CS240 (4-wire) Class A RTD Back of PV Module Temperature Sensor     'measurement 'CS240T_C'     BrHalf4W(CS240X,1,mV200,mV200,1,Vx1,1,350,True,True,0,60,1,0)       'Convert ratio to ohms     CS240Rs=CS240X*1000       'Calculate temperature from resistance     PRTCalc(CS240T_C,1,CS240Rs/1000,1,1,0)  ...

  • Page 37: Cs240Dm Program

    CS240DM(16) = CS240DM_4_SN Alias CS240DM(17) = CS240DM_4_Temperature Alias CS240DM(18) = CS240DM_4_Counter Alias CS240DM(19) = CS240DM_4_SensorStatus Alias CS240DM(20) = CS240DM_4_RangeCheck   DataTable (Hourly,1,-1) DataInterval (0,60,min,10)   Sample (20,CS240DM(),IEEE4)   Sample (1,AvgTemp,IEEE4)   Sample (1,SD_Temp,IEEE4) EndTable   BeginProg CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     31...
  • Page 38 (ResultCode(4),ComC1,19200,4,4,CS240DM(16),1,5,3,100,2)       AveTemp(1) = CS240DM(2)     AveTemp(2) = CS240DM(7)     AveTemp(3) = CS240DM(12)     AveTemp(4) = CS240DM(17)       AvgTemp = (AveTemp(1) + AveTemp(2) + AveTemp(3) + AveTemp(4))/4     StdDevSpa (SD_Temp,4,AveTemp())       CallTable Hourly   NextScan EndProg CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     32...

  • Page 39: Appendix C. Sensor Material Properties

    If the products have been exposed to severe weather conditions, we suggest to precondition the products at the above storage conditions for at least 24 hours before using them. CS240 and CS240DM PT-1000 Class A, Back-of-Module Temperature Sensors     33...
  • Page 40 Campbell Scientific regional offices Australia France Thailand Garbutt, QLD Australia Vincennes, France Bangkok, Thailand Location: Location: Location: 61.7.4401.7700 0033.0.1.56.45.15.20 66.2.719.3399 Phone: Phone: Phone: info@campbellsci.com.au info@campbellsci.fr info@campbellsci.asia Email: Email: Email: www.campbellsci.com.au www.campbellsci.fr www.campbellsci.asia Website: Website: Website: Brazil Germany São Paulo, SP Brazil...

This manual is also suitable for:

Cs240dm

Table of Contents