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Troubleshooting
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Summary of Contents for Campbell CS241DM
- Page 1 08/2021 Copyright © 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 Wiring 7.2 Data logger programming 7.2.1 Programming 7.3 Placement on a photovoltaic (PV) module 7.4 Mounting/cable strain relief 7.4.1 Adhesive mounting strip 7.4.2 Cable strain relief 7.4.3 Extreme sealing tape 8. -
Page 3: Introduction
(PV) module temperature but also can be used to measure the surface temperature of other devices. The CS241DM has a digital RS-485 output that can be directly read by a MeteoPV, CR6, CR1000X, or Modbus RTU RS-485 network. Other Campbell Scientific data loggers can use an MD485 multidrop interface to read the RS-485 output. -
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 CS241DM. You can also locate the sensor in the Sensors > Temperature folder. Double click CS204DM/CS241DM. Type the RS-485 address;... - 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. CS241DM PT-1000 Class A, Back-of-Module Temperature Sensor 3...
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Page 6: Overview
5. Overview The CS241DM 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 The CS241DM provides PV stakeholders with highly accurate back-of-module temperature, even at long cable lengths, in power performance modeling and simulation of solar energy applications. Back-of-module temperature is critical for any evaluation of effective irradiance and power conversion. FIGURE 5-1. CS241DM temperature sensor Benefits and features: ...
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Page 8: Specifications
Modbus RTU (over RS-485) Format: 8 data bits, 1 stop bit, even parity as default (user configurable) Baud rate: 19200 bps as default (user-configurable) Modbus ID: Last two digits of serial number as default (user- configurable) CS241DM PT-1000 Class A, Back-of-Module Temperature Sensor 6... - Page 9 7.37 mm nominal ± 0.13 mm (0.29 inch nominal ± 0.005 in) Conductor material: 22 AWG 19/0.0058 stranded tinned copper Cable type: 4 twisted pairs twisted together and wrapped with clear polyester tape to form a cable core CS241DM PT-1000 Class A, Back-of-Module Temperature Sensor 7...
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Page 10: Installation
The following table provides sensor wiring and cable pin-out. Detailed information about the cables are provided in the Specifications (p. 6). Sensor wiring is also available in the Device Configuration Utility and the MeteoPV User Interface. CS241DM PT-1000 Class A, Back-of-Module Temperature Sensor 8... -
Page 11: Data Logger Programming
7.2.1 Programming NOTE: Programming basics for the CR6 and CR1000X data loggers are provided in this section. Contact Campbell Scientific if using a data logger that requires an MD485 interface. CS241DM PT-1000 Class A, Back-of-Module Temperature Sensor 9... -
Page 12: Placement On A Photovoltaic (Pv) Module
Modbus addresses of 110 and 111, respectively. To collect all of the CS241DM values, the Start parameter needs to be 1 and the Length parameter needs to be 5. ModbusOption is an optional parameter described in the CRBasic Editor Help. -
Page 13: Adhesive Mounting Strip
The cable must be properly strain relieved after mounting the sensor to the measurement surface. To accomplish this, the CS241DM comes with three cable ties and three edge clips. 1. Fasten the edge clips at the top of the PV module in the following locations: a. -
Page 14: Extreme Sealing Tape
2. Use the cable ties to secure the cable to the edge clips. 7.4.3 Extreme sealing tape The CS241DM was designed to minimize surface area and mass. This design minimizes the effects of installation on bifacial modules and also increases the adhesion properties of the CS241DM PT-1000 Class A, Back-of-Module Temperature Sensor 12... - Page 15 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. See the following figure. FIGURE 7-1. Proper tape usage CS241DM PT-1000 Class A, Back-of-Module Temperature Sensor 13...
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Page 16: Operation
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 meters. ... - Page 17 1 = 1 stop bit Unsigned short 40004 Stop bit 2 = 2 stop bits Termination 0 = off/disable Unsigned short 40005 resistor 1 = on/enable Unsigned short data is a 16-bit positive integer. CS241DM PT-1000 Class A, Back-of-Module Temperature Sensor 15...
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Page 18: Device Configuration Utility
Utility can be used to change the CS241DM settings, view stored values, and update the CS241DM operating system (OS). It also provides wiring information. To use Device Configuration Utility, the CS241DM must be connected to a computer and 12 VDC power source. A USB-to-RS-485 adapter is required to connect the CS241DM to the computer. -
Page 19: Maintenance And Troubleshooting
Refer to the Assistance page at the back of this manual for more information. 9.1 Maintenance The CS241DM sensor requires minimal maintenance. Periodically check cabling for proper connections, signs of damage, and possible moisture intrusion. CS241DM PT-1000 Class A, Back-of-Module Temperature Sensor 17... -
Page 20: Troubleshooting
Check the cable for signs of damage and possible moisture intrusion. Symptom: Unstable Temperature Make sure the clear shield wire is connected to data logger ground, and the data logger is properly grounded. CS241DM PT-1000 Class A, Back-of-Module Temperature Sensor 18... -
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 CS241DM 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. CS241DM 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...