Campbell Scientific RAWS-F Remote Automated Weather Station for Fire Weather - Manual (Page 19)

RAWS-F Remote Automated Weather Station for Fire Weather
4.3.5 Troubleshooting .3.5 Troubleshooting
If a problem is suspected, check the sensor cable. Disconnect the connector
and use a digital volt meter (DVM) to check the resistance between Pin A
(sensor signal) and Pin C (sensor ground). The resistance should read as an
open circuit until you move the rain gage tipping mechanism where the magnet
swings past the reed relay. Try connecting a substitute sensor. Obtain an
RMA number before returning this sensor to Campbell Scientific for repair. If a problem is suspected, check the sensor cable. Disconnect the connector
and use a digital volt meter (DVM) to check the resistance between Pin A
(sensor signal) and Pin C (sensor ground). The resistance should read as an
open circuit until you move the rain gage tipping mechanism where the magnet
swings past the reed relay. Try connecting a substitute sensor. Obtain an
RMA number before returning this sensor to Campbell Scientific for repair.
4.4 Solar Radiation 4.4 Solar Radiation
4.4.1 General Description 4.4.1 General Description
The Apogee Pyranometer (pn CS300-QD) shown in FIGURE 4-3 measures
incoming solar radiation with a silicon photovoltaic detector mounted in a
cosine-corrected head. The detector outputs current; a shunt resistor in the
sensor converts the signal from current to voltage. During the night, the
CS300-QD may read slightly negative incoming solar radiation. The negative
signal is caused by RF noise. The Apogee Pyranometer (pn CS300-QD) shown in FIGURE 4-3 measures
incoming solar radiation with a silicon photovoltaic detector mounted in a
cosine-corrected head. The detector outputs current; a shunt resistor in the
sensor converts the signal from current to voltage. During the night, the
CS300-QD may read slightly negative incoming solar radiation. The negative
signal is caused by RF noise.
FIGURE 4-3. Pyranometer
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