1. Introduction
The CS325DM, manufactured by Atonometrics as the RC18, is a silicon solar irradiation sensor
commonly used as a reference cell in solar PV monitoring applications. The sensor element was
designed to correspond to that of a photovoltaic (PV) module, including spectral selectivity and
incident angle modifier. The data signals are Modbus RTU RS-485 or analog.
2. Precautions
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READ AND UNDERSTAND the
section at the back of this manual.
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Do not remove the screws on the top cover of the CS325DM, as this may compromise the
weather-proof seal.
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To minimize the potential for water entry to the sealed housing, mount the CS325DM with
the cable facing down or to the side.
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When opening the shipping package, do not damage or cut the cable jacket. If damage to
the cable is suspected, consult with a Campbell Scientific support engineer.
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Although rugged, the CS325DM should be handled as a precision scientific instrument.
3. Initial inspection
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Upon receipt of the CS325DM, inspect the packaging and contents for damage. File
damage claims with the shipping company.
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The model number and cable length are printed on a label at the connection end of the
cable. Check this information against the shipping documents to ensure the expected
product and cable length were received.
CS325DM Silicon Irradiance Reference Sensor
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