Campbell Scientific CS300 Silicon Pyranometer - Manual (Page 12)

CS300 Pyranometer
7. Select any other sensors you have, then finish the remaining Short Cut
steps to complete the program. The remaining steps are outlined in Short
Cut Help, which is accessed by clicking on Help | Contents |
Programming Steps.
8. If LoggerNet, PC400, RTDAQ, or PC200W is running on your PC, and the
PC to datalogger connection is active, you can click Finish in Short Cut
and you will be prompted to send the program just created to the
datalogger.
9. If the sensor is connected to the datalogger, as shown in the wiring
diagram in step 6, check the output of the sensor in the datalogger support
software data display to make sure it is making reasonable measurements.
5. Overview
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 (360 to 1120 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.
6. Specifications
Features:
• Designed for continuous, long term, unattended operation in adverse
conditions
• Dome-shaped head prevents water from accumulating on the sensor
head
• Compatible with the CWS900-series interfaces, allowing it to be used
in a wireless sensor network
• Compatible with Campbell Scientific CRBasic dataloggers:
CR200(X) series, CR800 series, CR1000, CR3000, CR5000, and
CR9000(X). Also compatible with Edlog dataloggers: CR500,
CR510, CR10(X), CR23X, CR7, and 21X
Power requirements: none, self-powered
Sensitivity: 5 W m –2 mV –1 (0.2 mV W –1 m –2 )
Absolute accuracy: ±5% for daily total radiation
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