Campbell SR20-D2 Product Manual
  1. Manuals
  2. Brands
  3. Campbell Manuals
  4. Measuring Instruments
  5. SR20-D2
  6. Product manual

Campbell SR20-D2 Product Manual

Digital secondary standard pyranometer
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Revision: 04/2020
Copyright © 2018 – 2020
Campbell Scientific, Inc.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the SR20-D2 and is the answer not in the manual?

Questions and answers

Related Manuals for Campbell SR20-D2

Summary of Contents for Campbell SR20-D2

  • Page 1 Revision: 04/2020 Copyright © 2018 – 2020 Campbell Scientific, Inc.

  • Page 2: Table Of Contents

    Table of contents 1. SR20-D2 introduction 2. Siting 3. Mounting procedure 4. SR20-D2 wiring 4. RS-485 default configuration 5. SR20-D2 register map 6. RS-485 programming 7. SR20-D2 example program 8. Maintenance and troubleshooting Table of Contents - i...

  • Page 3: Sr20-D2 Introduction

    1. SR20-D2 introduction The SR20-D2, manufactured by Hukseflux Thermal Sensors, is an ISO 9060 digital spectrally flat Class A (secondary standard) pyranometer that measures solar short-wave radiation in a full hemisphere of the sky. It has a built-in case-temperature sensor and embedded heater for removing dew and light rain.
  • Page 4 4. Secure the mounting bracket to the crossarm or vertical pole using the hardware included with the mounting bracket. The CM255 uses one U-bolt, nuts, flat washers, and lock washers to mount the bracket, as shown in the following figure. SR20-D2 ISO Spectrally Flat Class A (Secondary Standard) Pyranometer...

  • Page 5: Sr20-D2 Wiring

    A-, C (odd) White RS-485B B+, C (even) Power in (12 V) 12V Black Power ground G Clear Shield ⏚ (analog ground) Assumes the sensor directly connects to the data logger. SR20-D2 ISO Spectrally Flat Class A (Secondary Standard) Pyranometer...

  • Page 6: Rs-485 Default Configuration

    Signed 32 bit integer Sensor voltage output Signed 16 bit integer Serial number Float µV/W/m Sensor sensitivity Signed 32 bit integer Calibration date Signed 16 bit integer x 0.01 % Humidity SR20-D2 ISO Spectrally Flat Class A (Secondary Standard) Pyranometer...

  • Page 7: Rs-485 Programming

    6. RS-485 programming The RS-485 output can be directly read by a MeteoPV, CR6-series, CR1000X-series, or Modbus RTU RS-485 network. Other Campbell Scientific data loggers can use an MD485 multidrop interface to read the RS-485 output (refer to the MD485 manual).
  • Page 8 CRBasic Example 1: CR1000X program for measuring the SR20-D2 'CR1000X Series Datalogger 'Hukseflux SR20-D2 Pyranometer 'SR20 is a ISO 9060 Secondary Standard digital pyranometer 'D2 uses Modbus RS-485 protocol 'PN 34088 SR20-D2CBL-L (CSI's SR20D2 Cable) As Long SR20D2(15) Public 'Temperature compensated x 0.01 W/M^2...
  • Page 9 CRBasic Example 1: CR1000X program for measuring the SR20-D2 EndTable DataTable (SR20D2_SensorID,1,100) Sample (1,SR20D2_SerialNumber,FP2) Sample (1,SR20D2_CalDate,Long) Sample (1,SR20D2_ScaleFactor_IRR,FP2) Sample (1,SR20D2_ScaleFactor_BodyTemp,FP2) EndTable BeginProg SerialOpen (ComC5,19200,2,0,50,4) ModbusMaster (ModbusResult_SN,ComC5,19200,53,4,SR20D2(1),41,1,1,100,3) 'Serial Number SR20D2_SerialNumber = SR20D2(1) ModbusMaster (ModbusResult_CalDate,ComC5,19200,53,4,SR20D2(2),47,1,1,100,2) 'Cal Date SR20D2_CalDate = SR20D2(2) ModbusMaster (ModbusResult_SFIRR,ComC5,19200,53,4,SR20D2(3),9,1,1,100,3)
  • Page 10 CRBasic Example 1: CR1000X program for measuring the SR20-D2 'Electrical Resistance SR20D2_ElecResistance = SR20D2(10)/10 ModbusMaster (ModbusResult_VoltOut,ComC5,19200,53,4,SR20D2(11), _ 11,2,1,100,2) 'Voltage output SR20D2_VoltageOut = SR20D2(11) ModbusMaster (ModbusResult_Humidity,ComC5,19200,53,4,SR20D2(13), _ 99,1,1,100,3) 'Humidity SR20D2_Humidity = SR20D2(13)/100 CallTable SR20D2_MetaData NextScan SlowSequence Scan (1,Sec,0,1) SR20D2_SerialNumber = 0...

  • Page 11: Maintenance And Troubleshooting

    8. Maintenance and troubleshooting The SR20-D2 has no service items requiring scheduled replacement. There is no accessible desiccant cartridge to maintain. Use pure alcohol or distilled water and a lint-free cloth to clean the dome, removing smears and deposits. Local conditions and application dictate cleaning interval.
  • Page 12 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 13 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 14 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 15 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...

Table of Contents