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Troubleshooting
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Summary of Contents for Campbell CS250DM
- Page 1 12/2020 Copyright © 2020 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 Siting 7.2 Installation in a radiation shield 7.3 Mount the shield 7.4 Wiring 7.5 Programming 7.5.1 RS-485 programming 7.6 Long cable lengths 7.7 Modbus register map 7.8 Device Configuration Utility 8. -
Page 3: Introduction
1. Introduction The CS250DM delivers extremely accurate and precise air temperature data necessary for IEC 61724 Class A solar monitoring applications and delta temperature (ΔT) calculations for temperature gradient and stability analysis. 2. Precautions READ AND UNDERSTAND the Safety section at the back of this manual. - Page 4 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 CS250DM. You can also locate the sensor in the Sensors > Temperature folder. Double click the sensor model. 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. CS250DM PT-1000 Class A, Precision Air Temperature Sensor...
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Page 6: Overview
5. Overview The CS250DM uses a precision PT-1000 class A platinum resistor thermometer (PRT) to provide the highest level of accuracy. The cable includes a Campbell Scientific precision analog-to- digital, smart-sensor module for making the measurements. The module design is optimized for the class A PRT that minimizes self-heating and lead-wire resistance. -
Page 7: Specifications
± (0.15 + 0.002t) °C Long-term stability: Maximum R drift = 0.04% after 1000 hours at 400 °C Measurement temperature range: –75 to +250 °C Time constant: 15 seconds in 5 m/s wind CS250DM PT-1000 Class A, Precision Air Temperature Sensor... - Page 8 Wire size and type: 24 AWG (7/32) tinned copper Insulation type: AWM 10012 1000V 105°C Filler: Fibrillated polypropylene as required for uniform round construction Drain: 24 AWG (7/32) tinned copper (cabled, touching foil) CS250DM PT-1000 Class A, Precision Air Temperature Sensor...
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Page 9: Installation
30 m (98.4 ft) from large, paved areas. Sensors should be protected from thermal radiation and adequately ventilated. Protect the filter at the top of the sensor from exposure to liquid water. CS250DM PT-1000 Class A, Precision Air Temperature Sensor... - Page 10 1.25 to 2.0 m (4.1 to 6.5 ft) (WMO) 2.0 m (6.5 ft) (EPA) When used in the field, the CS250DM must be housed in a radiation shield. Typically, the RAD06 6-plate radiation shield is used. The white color of these shields reflects solar radiation, and the louvered construction allows air to pass freely through, thereby keeping the sensor at or near ambient temperature.
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Page 11: Installation In A Radiation Shield
4. First tighten the nut on the gland by hand until the sensor is held firmly in place. Then use the large adjustable wrench to further tighten the gland by 1/2 to 1 turn. CS250DM PT-1000 Class A, Precision Air Temperature Sensor... -
Page 12: Mount The Shield
Shield 7.5 Programming Short Cut is the best source for up-to-date programming code for Campbell Scientific data loggers. If your data acquisition requirements are simple, you can probably create and maintain a data logger program exclusively with Short Cut. If your data acquisition needs are more complex,... -
Page 13: Rs-485 Programming
110 and 111, respectively. The default Modbus address and serial settings are printed on the cable. To collect all of the CS250DM 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 14: Long Cable Lengths
Follow these guidelines when using long cables: Use low capacitance, low resistance, screened cable (as supplied by Campbell Scientific) to reach distances of several hundred meters. Ensure that the power ground wire has low resistance and is connected to the same ground reference as the data logger control terminals. -
Page 15: Device Configuration Utility
Unsigned short data is a 16-bit positive integer. 7.8 Device Configuration Utility Device Configuration Utility is bundled in Campbell Scientific data logger support software and is available, at no cost, from www.campbellsci.com/downloads. Use Device Configuration Utility to change the CS250DM settings, view stored values, and update the CS250DM operating system (OS). - Page 16 3. Follow steps listed under Connecting to a CM250DM with a USB to RS-485 adapter. CS250DM PT-1000 Class A, Precision Air Temperature Sensor...
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Page 17: Maintenance And Troubleshooting
All factory repairs and recalibrations require a returned material authorization (RMA) and completion of the “Statement of Product Cleanliness and Decontamination” form. Refer to Assistance page at the end of this manual for more information. CS250DM PT-1000 Class A, Precision Air Temperature Sensor... -
Page 18: Maintenance
8.1 Maintenance The CS250DM requires minimal maintenance. Periodically check cabling for proper connections, signs of damage, and possible moisture intrusion. Check the radiation shield monthly to make sure it is free from dust and debris. To clean the shield, first remove the sensor. Dismount the shield. -
Page 19: 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 CS250DM PT-1000 Class A, Precision Air Temperature Sensor... - Page 20 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.
- Page 21 Campbell Scientific office serves your country. 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.
- Page 22 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 23 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...