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Summary of Contents for Campbell CS241
- Page 1 Revision: 05/2021 Copyright © 2020 – 2021 Campbell Scientific, Inc.
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Page 2: Table Of Contents
Table of contents 1. Introduction 2. Precautions 3. Initial inspection 4. QuickStart 5. Overview 6. Specifications 7. Installation 7.1 Circuit diagrams 7.2 Wiring 7.3 Data logger programming 7.3.1 Resistance measurement and conversion to temperature 7.4 Placement on a photovoltaic (PV) module 7.5 Mounting/cable strain relief 7.5.1 Adhesive mounting strip 7.5.2 Cable strain relief... -
Page 3: Introduction
(PRT) to measure temperature. It is designed for measuring the back-of- photovoltaic (PV) module temperature but also can be used to measure the surface temperature of other devices. The CS241 can be measured with a 2-wire or 4-wire configuration and is compatible with most Campbell Scientific data loggers. -
Page 4: Quickstart
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 CS241. You can also locate the sensor in the Sensors > Temperature folder. Double click the sensor model. The surface temperature defaults to degree C. - Page 5 5. Repeat steps three and four for other sensors you want to measure. Click Next. 6. In Output Setup, type the scan rate, a meaningful table name, and the Data Output Storage Interval. CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 3...
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Page 6: Overview
5. Overview The CS241 is a surface mountable platinum resistive thermometer (PRT) that measures back-of- module temperature for solar energy applications. It uses a precision PT-1000 Class A PRT to provide the highest level of accuracy. To withstand the harsh treatment that commonly occurs... - Page 7 User-selectable and standard cable lengths offered 2-wire or 4-wire configurations to satisfy accuracy even at long cable lengths Compatible with Campbell Scientific CRBasic data loggers: CR6, CR3000, CR1000X, CR800 series, CR300 series, CR1000 CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 5...
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Page 8: Specifications
EMC compliance: Conforms with Electromagnetic Compatibility Directive (EMC) RoHS2: Conforms with Restriction of Hazardous Substances Directive (RoHS2) POE compliance: POE compliant (802.3af) to 100 meters when installed per recommendations in TIA TSB-184 CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 6... -
Page 9: Installation
This section discusses the following: 7.1 Circuit diagrams 7.2 Wiring 7.3 Data logger programming 7.4 Placement on a photovoltaic (PV) module 7.5 Mounting/cable strain relief 7.6 Cable resistance/long cable lengths 7.7 Electrical noisy environments CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 7... -
Page 10: Circuit Diagrams
FIGURE 7-1 (p. 8) provides the circuit diagram for the 2-wire configuration. FIGURE 7-2 (p. 8) provides the circuit diagram for the 4-wire configuration. FIGURE 7-1. 2-Wire Circuit Diagram FIGURE 7-2. 4-Wire Circuit Diagram CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 8... -
Page 11: Wiring
7.2 Wiring The CS241 sensor head includes a short, white cable with a circular plastic M12 type male 8-pin connector. A second cable with a mating circular plastic M12 type female 8-pin connector is used to attach the sensor to the data logger (see FIGURE 7-3 (p. - Page 12 FIGURE 7-4. Resistor in M12 male connector. Right image shows pin numbers. The data logger can measure the CS241 using either a 2-wire or 4-wire configuration. The 2-wire configuration accuracy decreases, relative to the 4-wire, as a function of the cable length. The 4-wire configuration eliminates resistance due to cable length and is the most accurate way to measure this sensor.
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Page 13: Data Logger Programming
Downloadable program example is available at www.campbellsci.com/downloads/cs241-program-example If applicable, please read Electrical noisy environments (p. 17) and Cable resistance/long cable lengths (p. 16) prior to programming your data logger. CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 11... -
Page 14: Resistance Measurement And Conversion To Temperature
7.3.1 Resistance measurement and conversion to temperature The CS241 program needs to measure the resistance of the CS241 then convert that resistance measurement to temperature. Accurate resistance measurements require a high-precision fixed resistor with low thermal coefficient. The CS241 includes a 1000 Ohm metal film resistor with 0.01% accuracy and 2 ppm thermal coefficient in the connector on the sensor side. -
Page 15: Placement On A Photovoltaic (Pv) Module
The cable must be properly strain relieved after mounting the sensor to the measurement surface. To accomplish this, the CS241 comes with three cable ties and three edge clips. CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 13... - Page 16 1. Fasten the edge clips at the top of the PV module in the following locations: a. Above the sensor b. Next to the cable connector CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 14...
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Page 17: Extreme Sealing Tape
2. Use the cable ties to secure the cable to the edge clips. 7.5.3 Extreme sealing tape The CS241 was designed with principles to minimize surface area and mass. This design minimizes the effects of installation on bifacial modules and also increases the adhesion properties of the sensor to the module surface. -
Page 18: Cable Resistance/Long Cable Lengths
Cable resistance can cause significant error (FIGURE 7-6 (p. 17)). The 4-wire half bridge configuration is the best configuration for long cable lengths. CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 16... -
Page 19: Electrical Noisy Environments
AC power lines, pumps, power inverters, and motors can be the source of electrical noise. If the sensor or data logger is located in an electrically noisy environment, the sensor should be measured with the 60 or 50 Hz rejection option. CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 17... -
Page 20: Maintenance And Troubleshooting
8.1 Maintenance The CS241 sensor requires minimal maintenance. Periodically check cabling for proper connections, signs of damage, and possible moisture intrusion. 8.2 Troubleshooting Symptom: Temperature is NAN, –INF, –9999, –273 Verify wiring of sensor to the data logger;... -
Page 21: 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 CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 19... -
Page 22: Appendix B. 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. CS241 PT-1000 Class A, Back-of-Module Temperature Sensor 20... - Page 23 See Product Details on the Ordering Information pages at www.campbellsci.com . Other manufacturer's products, that are resold by Campbell Scientific, are warranted only to the limits extended by the original manufacturer. Refer to www.campbellsci.com/terms#warranty for more information.
- Page 24 To obtain a Returned Materials Authorization or Repair Reference number, contact your CAMPBELL SCIENTIFIC regional office. Please write the issued number clearly on the outside of the shipping container and ship as directed. For all returns, the customer must provide a “Statement of Product Cleanliness and Decontamination”...
- Page 25 Do not recharge, disassemble, heat above 100 °C (212 °F), solder directly to the cell, incinerate, or expose contents to water. Dispose of spent batteries properly. 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...
- Page 26 Campbell Scientific regional offices Australia France Thailand Location: Garbutt, QLD Australia Location: Vincennes, France Location: Bangkok, Thailand Phone: 61.7.4401.7700 Phone: 0033.0.1.56.45.15.20 Phone: 66.2.719.3399 Email: info@campbellsci.com.au Email: info@campbellsci.fr Email: info@campbellsci.asia Website: www.campbellsci.com.au Website: www.campbellsci.fr Website: www.campbellsci.asia Brazil Germany Location: São Paulo, SP Brazil...
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