Campbell CS320 Product Manual
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Campbell CS320 Product Manual

Digital thermopile pyranometer
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Revision: 01/2020
Copyright ©
1994 – 2020
Campbell Scientific, Inc.

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Summary of Contents for Campbell CS320

  • Page 1 Revision: 01/2020 Copyright © 1994 – 2020 Campbell Scientific, Inc.
  • Page 2 Limited warranty “Products manufactured by CSI are warranted by CSI to be free from defects in materials and workmanship under normal use and service for twelve months from the date of shipment unless otherwise specified in the corresponding product manual. (Product manuals are available for review online at www.campbellsci.com.) Products not manufactured by CSI, but that are resold by CSI, are warranted only to the limits extended by the original manufacturer.
  • Page 3 Campbell Scientific reserves the right to refuse service on products that were exposed to contaminants that may cause health or safety concerns for our employees.
  • 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...

  • Page 5: 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 Mounting procedure 7.3 Wiring 7.4 Programming 7.4.1 SDI-12 programming 7.4.2 Total flux density 8. Operation 8.1 SDI-12 measurements 8.2 Measurements at fast scan rates 8.3 Heater control 8.4 Long cables 9.
  • Page 6 C.9 Stopping a measurement command C.10 Send data command (aD0! … aD9!) C.11 Extended commands C.12 SDI-12 transparent mode C.12.1 Changing an SDI-12 address C.12.2 Changing an SDI-12 address — CR200(X) Series Campbell Scientific regional offices Table of Contents - v...

  • Page 7: Introduction

    385 to 2105 nm. The CS320 provides onboard storage of digital calibration data and has a digital SDI-12 output that can be read by most Campbell Scientific data loggers. A detachable cable allows easier field servicing.
  • Page 8 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 CS320 or find the sensor in the Sensors > Meteorological > Solar Radiation folder, and double-click CS320 Digital Thermopile Pyranometer.
  • Page 9 5. Repeat steps three and four for other sensors you want to measure. Click Next. 6. In Output Setup, type the scan rate, a Table Name, and Data Output Storage Interval. Click Next. NOTE: Because of the delays using SDI-12, Campbell Scientific recommends measurement scans of 10 seconds or more. CS320 Digital Thermopile Pyranometer...

  • Page 10: Overview

    Ideally, the X, Y, and Z measurements should be zero. Tilt in any direction changes the Z-axis measurement. If the Z-axis measurement is greater than 1.0 or less than -1.0, the CS320 needs to be leveled. With the appropriate data logger CS320 Digital Thermopile Pyranometer...

  • Page 11: Specifications

    CS320 is no longer level, which can affect the accuracy of the global radiation measurements. The CS320 has an SDI-12 output, where shortwave radiation is returned in digital format.

  • Page 12: Installation

    (p. 1), for a Short Cut tutorial. 7.1 Siting The CS320 should be mounted such that no shadows or reflections are cast on it by the tripod/tower or other sensors. Mounting the CS320 on a crossarm can help avoid reflections from the tripod or tower mast.

  • Page 13: Mounting Procedure

    NOTE: You can also use a CM225 or 015ARM to mount the CS320 to a tripod or tower. However, a leveling base is required. The installation procedure for using the CM225 and 015ARM mounts is available in an older manual at www.campbellsci.com/old-manuals.
  • Page 14 6. Route the sensor cable along the underside of the crossarm to the tripod/tower, and to the instrument enclosure. 7. Secure the cable to the crossarm and mast using cable ties. 8. Remove the green cap after installing the sensor. Save this cap for shipping or storing the sensor. CS320 Digital Thermopile Pyranometer...

  • Page 15: Wiring

    For the CR6 and CR1000X data loggers, triggering conflicts may occur when a companion terminal is used for a triggering instruction such as TimerInput(), PulseCount(), or WaitDigTrig(). For example, if the CS320 is connected to C3 on a CR1000X, C4 cannot be used in the TimerInput(), PulseCount(), or WaitDigTrig() instructions.

  • Page 16: Sdi-12 Programming

    (p. 16) for more information. 8. Operation The CS320 is a thermopile pyranometer.Thermopile pyranometers use a series of thermoelectric junctions to provide a signal of several μV/W/m proportional to the temperature difference between a black absorbing surface and a reference. The reference may be either a white reflective surface or the internal portion of the sensor base.

  • Page 17: Sdi-12 Measurements

    CS320 thermopile uniformly absorbs solar radiation across the shortwave solar spectrum from 385 to 2105 nm. 8.1 SDI-12 measurements The CS320 responds to the M!, M1!, M2!, M3!, M4!, C!, C1!, C2!, C3!, C4!, and ?! SDI-12 commands. CS320 SDI-12 commands (p.

  • Page 18: Measurements At Fast Scan Rates

    Use the XHON! SDI-12 command to turn the heater on and the XHOFF! SDI-12 command to turn the heater off. Campbell Scientific recommends only powering the heater when frost or condensation is likely to occur. The most convenient method for doing this is to have the data logger program turn the heater on and off based on air temperature measurements and dewpoint calculations.

  • Page 19: Long Cables

    ±4% in all climates and locations around the world. For best accuracy, the sky must be completely clear, as reflected radiation from clouds causes incoming radiation to increase above the value predicted by the clear sky calculator. CS320 Digital Thermopile Pyranometer...

  • Page 20: Troubleshooting

    (by more than 6%), the sensor should be cleaned and re-leveled. If measurements are still different after a second test, contact Campbell Scientific to discuss test results and possible return of sensor(s). Refer to the Assistance (p.

  • 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 CS320 Digital Thermopile Pyranometer...

  • Page 22: Appendix B. Example Programs

    The HygroVUE™10 Air Temperature and Relative Humidity Probe provides the measurements used in the dewpoint calculation. Table B-1: Wiring for example programs Wire CR1000X Wire color function connections connections CS320 Solar Radiation Sensor White SDI-12 signal Clear Shield ⏚ ⏚ Power Black...
  • Page 23 CRBasic Example 1: CR1000X program using the CS320 M4! command 'Program scan rate, in seconds, can be changed here and changes 'will automatically roll into the multiplier for megajoules. 'Must be defined as a constant. Const SCANRATE = 10 'Declare Variables and Units...
  • Page 24 CRBasic Example 1: CR1000X program using the CS320 M4! command SlrMJ SlrRad_W SCANRATE 1E-6 CallTable Hourly CallTable Daily NextScan EndProg CRBasic Example 2: CR6 program controlling the CS320 heater 'Program scan rate, in seconds, can be changed here and changes 'will automatically roll into the multiplier for megajoules.
  • Page 25 CRBasic Example 2: CR6 program controlling the CS320 heater Average (1,SlrW,FP2,False) EndTable DataTable (Daily,True,-1) DataInterval (0,1440,Min,10) Minimum (1,AirTempC,FP2,False,True) Maximum (1,AirTempC,FP2,False,True) Minimum (1,RH,FP2,False,True) Maximum (1,RH,FP2,False,True) Minimum (1,DewPtC,FP2,False,True) Maximum (1,DewPtC,FP2,False,True) Totalize (1,SlrMJ,IEEE4,False) 'IEEE4 to not overrun on sunny days Histogram (HtrCntrl * -1,FP2,False,2,000,1,0,1) FieldNames "FracHtrTimeOff,FracHtrTimeOn"...
  • Page 26 >= Then HtrCntrl = False EndIf Else 'Shut heater off if battery voltage is less than 11.7 VDC HtrCntrl False EndIf 'CS320 heater is SDI-12 controlled by the Boolean variable HtrCntrl. HtrCntrl True Then SDI12Recorder (Htr,C3,0, "XHON!" ,1.0,0) HtrCntrl False...

  • Page 27: Appendix C. Sdi-12 Sensor Support

    SDI-12, Serial Data Interface at 1200 baud, is a protocol developed to simplify sensor and data logger compatibility. Only three wires are necessary — serial data, ground, and 12 V. With unique addresses, multiple SDI-12 sensors can connect to a single SDI-12 terminal on a Campbell Scientific data logger.

  • Page 28: Acknowledge Active Command (A!)

    Table C-1: Campbell Scientific sensor SDI-12 command and response set Response Name Command aAb! Change Address b<CR><LF> Start Measurement atttn<CR><LF> aM1!...aM9! aMC! Start Measurement atttn <CR><LF> aMC1!...aMC9! and Request CRC Start Concurrent Measurement atttnn<CR><LF> aC1!...aC9! aCC! Start Concurrent Measurement atttnn<CR><LF> aCC1!...aCC9! and Request CRC a<values><CR><LF>...

  • Page 29: Start Verification Command (Av!)

    For example, to change an address from 0 to 2, the command is 0A2!. The sensor responds with the new address b, which in this case is 2. NOTE: Only one sensor should be connected to a particular terminal at a time when changing addresses. CS320 Digital Thermopile Pyranometer...

  • Page 30: Start Measurement Commands (Am!)

    To use this command, the scan interval should be 10 seconds or less. The response to each command has the form atttn<CR><LF>, where CS320 Digital Thermopile Pyranometer...
  • Page 31 Z+1+2+3+4+5+6+7+8+9+10<CR><LF> address and the 10 values. 10 seconds later, after a total of 30 seconds have passed, the data logger starts the process of XD0! collecting data from sensor X by issuing the first D command. CS320 Digital Thermopile Pyranometer...

  • Page 32: Stopping A Measurement Command

    75 characters of data in response to a D command that follows a C! or CC! command. Data values are separated by plus or minus signs. Command: aD0! (aD1! … aD9!) Response: a<values><CR><LF> or a<values><CRC><CR><LF> where: a = the sensor address CS320 Digital Thermopile Pyranometer...

  • Page 33: Extended Commands

    Transparent mode is entered while the computer is communicating with the data logger through a terminal emulator program. It is accessed through Campbell Scientific data logger support software or other terminal emulator programs. Data logger keyboards and displays cannot be used.

  • Page 34: Changing An Sdi-12 Address

    10. To change the SDI-12 address, type aAb!, where a is the current address from the previous step and b is the new address (see FIGURE C-1 (p. 29). Press Enter. The sensor changes its address and responds with the new address. 11. To exit SDI-12 transparent mode, click Close Terminal. CS320 Digital Thermopile Pyranometer...

  • Page 35: Changing An Sdi-12 Address - Cr200(X) Series

    5. Select All Caps Mode. 6. Press Enter until the data logger responds with the CR2XX> prompt. 7. Type SDI12 and press Enter. 8. The response SDI12> indicates that the sensor is ready to accept SDI-12 commands. CS320 Digital Thermopile Pyranometer...
  • Page 36 11. To exit SDI-12 transparent mode, click Close Terminal. FIGURE C-2. CR200(X) example of using the SDI-12 transparent mode to change the SDI- 12 address from 0 to 1 CS320 Digital Thermopile Pyranometer...

  • Page 37: Campbell Scientific Regional Offices

    INFO Global Sales & Support Network A worldwide network to help meet your needs Australia France Thailand Garbutt, QLD Australia Vincennes, France Bangkok, Thailand Location: Location: Location: Phone: 61.7.4401.7700 Phone: 0033.0.1.56.45.15.20 Phone: 66.2.719.3399 info@campbellsci.com.au info@campbellsci.fr info@campbellsci.asia Email: Email: Email: www.campbellsci.com.au www.campbellsci.fr www.campbellsci.asia Website:...

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