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Related Manuals for Campbell CS325DM
Summary of Contents for Campbell CS325DM
- Page 1 Revision: 07/2020 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. Overview 5. Specifications 6. Siting 7. Mounting 8. Wiring 9. Programming 9.1 RS-485 programming 9.1.1 Register map 9.2 Analog programming 10. Maintenance and troubleshooting Appendix A. Example programs Table of Contents - i... -
Page 3: Introduction
Safety section at the back of this manual. Do not remove the screws on the top cover of the CS325DM, as this may compromise the weather-proof seal. To minimize the potential for water entry to the sealed housing, mount the CS325DM with the cable facing down or to the side. -
Page 4: Overview
SCADA systems when installing a new unit. The CS325DM measures irradiance using a crystalline silicon PV cell. The PV cell short-circuit current is measured with a precision shunt resistor and PV cell temperature is measured with a back-of-cell resistance temperature device (RTD). - Page 5 Analog output options: 0 to 1.5 V; 0 to 10 V; 4 to 20 mA Output signals: Irradiance, cell temperature, short-circuit current Output impedance: 2 kohm (0 to 1.5 V or 0 to 10 V mode) Internal voltage drop: Allow 3.5 V minimum (4 to 20 mA mode) CS325DM Silicon Irradiance Reference Sensor...
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Page 6: Siting
6. Siting A CS325DM used for monitoring PV installations must be installed with the same alignment and inclination as the PV generator. The mounting location should be free of shading. To facilitate maintenance and cleaning, mount the CS325DM in an easily accessible location such as near windows or skylights. - Page 7 Power and stripe signal ground Orange ⏚ (analog ground) Green ⏚ (analog ground) Clear Shield ⏚ (analog ground) The white/blue striped and blue wires are not used. U terminals are automatically configured by the measurement instruction. CS325DM Silicon Irradiance Reference Sensor...
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Page 8: 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 for information about using the MD485. -
Page 9: Analog Programming
Rejection for North America and areas using 60 Hz AC voltage. Select 50 Hz Noise Rejection for most of the Eastern Hemisphere and areas that operate at 50 Hz. The multiplier converts the millivolt reading to engineering units. CS325DM Silicon Irradiance Reference Sensor... -
Page 10: Maintenance And Troubleshooting
G167, ISO 9846, ASTM E824 or ASTM G207 by an accredited lab. The recommended recalibration interval is 2 years. The most common reason for communication failure for the CS325DM is because the sensor is not configured properly. Ensure that the sensor has a unique Modbus address and proper RS-485 settings. -
Page 11: Appendix A. Example Programs
⏚ Ground Clear ⏚ Shield The white/orange and white/green wires are not used for Modbus RS-485 programming. CRBasic Example 1: CR1000X program that measures the CS325DM using Modbus 'CR1000X Series Data Logger 'CS325DM-L RC18 Reference Cell Public Units PTemp : PTemp = °C... - Page 12 CRBasic Example 1: CR1000X program that measures the CS325DM using Modbus 'the following data points are useful but not always necessary Average (1,CS325DM_Isc,IEEE4,CS325DM_Isc = NAN) StdDev (1,CS325DM_Isc,IEEE4,CS325DM_Isc = NAN) Average (1,CS325DM_PVTemp,IEEE4,CS325DM_PVTemp = NAN) StdDev (1,CS325DM_PVTemp,IEEE4,CS325DM_PVTemp = NAN) EndTable Function MBDecode (Code)
- Page 13 CRBasic Example 1: CR1000X program that measures the CS325DM using Modbus SerialClose (ComC7) SerialOpen (ComC7,19200,2,0,10000,4) SerialFlush (ComC7) Scan (1,Sec,0,0) PanelTemp (PTemp,15000) Battery (Batt_volt) 'CS325DM ModbusMaster (ModbusResult,ComC7,19200,18,3,Modbus_CS325DM,2,3,1,100,2) CS325DM_ModbusResult = MBDecode(ModbusResult) ModbusResult = 0 Then CS325DM_Irradiance = Modbus_CS325DM(1) CS325DM_Isc = Modbus_CS325DM(2) 'Short-Circuit Current...
- Page 14 CRBasic Example 2: CR1000X program that measures the CS325DM analog outputs 'CR1000X Series Data Logger 'CS325DM-L RC18 Reference Cell Analog program Public Units PTemp : PTemp = °C Public Units Batt_volt : Batt_volt = VDC 'RC18 Analog 1 configured as Irradiance w 0 to 1.5V output, 0 to 1500 W/m²...
- Page 15 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 16 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 17 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...
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