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1.Shine a 60 W incandescent light from a distance of approx. 100 mm {3.9 in} directly onto the solar radiation sensor.

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2.Connect the positive (+) lead to terminal A and the negative (−) lead to terminal B of the solar radiation sensor, and verify that the voltages is approx. 0.45 V.

• If the voltage is not as specified, replace the solar radiation sensor.