English
Measuring solar radiation can be done by the S-SI-01I module, which should be connected to the analogue inputs of the modules C-HM-0308M, C(R)-HM-1113M or C(R)-HM-1121M.
The solar radiation sensor uses for its own measurement of intensity a monocrystalline silicon solar cell with an integrated temperature sensor; it is used for a temperature compensation of the solar cell.
The level of intensity (W/m2) is calculated using the function in the programming environment, where you need to enter the specific sensor calibration constant; it is written on the label on the internal side of the cap, and it should be copied before the sensor is mounted.
Fig. 1 Connecting the solar radiation sensor S-SI-01I to the C-HM-0308M module
Notes:
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The intensity sensor output is connected to the AI1 input, the NTC 12k temperature sensor (used for the temperature correction of the measurement) is connected to the AI2 input. - N.B: It cannot be used for measuring the outdoor temperature!
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In the example the temperature sensor is connected to the AI3 input (e.g. an outdoor temperature sensor).
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Input AI1 must be set to a measurement range of 100 mV
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The sensor outlets (terminated in the underside of the cap S-SI-01I) can be extended with a cable; a shielded cable is recommended, with the minimum diameter of the wire 0.5mm and a maximum length approx. 10-20 meters (it can be even be longer, but then it is necessary to use a correctly connected shielded cable and avoid parallel layout with power lines).