Campbell Scientific CS300 CS300 Silicon Pyranometer - Page 5
CS300 Pyranometer, 1. General Description, 2. Specifications
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CS300 Pyranometer 1. General Description The CS300 measures incoming solar radiation with a silicon photovoltaic detector mounted in a cosine-corrected head. Output from the detector is a current, which is converted to voltage by a potentiometer potted in the sensor head. The resistance of the potentiometer is adjusted when the sensor is calibrated so that all sensors have the same output sensitivity. The CS300 is calibrated against a Kipp and Zonen CM21 under natural sunlight to accurately measure sun plus sky radiation (300 to 1100 nm). The CS300 should not be used under vegetation or artificial lights. During the night the CS300 may read slightly negative incoming solar radiation. This negative signal is caused by RF noise passing through the photo-diode. Negative values may be set to zero in the datalogger program. For more theoretical information on the silicon photovoltaic detector see Kerr, J. P., G. W. Thurtell, and C. B. Tanner: An integrating pyranometer for climatological observer stations and mesoscale networks. J. Appl. Meteor., 6, 688-694. 2. Specifications Power requirements: none, self-powered Absolute accuracy: ±5% for daily total radiation Cosine response: ±4% at 75° zenith angle ±1% at 45° zenith angle Temperature response:
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