Campbell Scientific RAWS-F Remote Automated Weather Station for Fire Weather - Manual (Page 17)

RAWS-F Remote Automated Weather Station for Fire Weather
4.2.2 Wiring
The HC2S3 attaches to the connector labeled TEMP/RH, which is color coded
orange. This sensor is internally wired from the RAWS connector panel to the
CR1000.
TABLE 4-1. TEMP/RH Connector (color coded orange)
Connector Pin Description CR1000 Terminal
A Temperature H 1L
B Sensor Excitation VX1
C Sensor Signal L/
D Power Ground G
E RH Signal 1H
F Switched 12 V SW_12V
4.2.3 Maintenance
The temp/RH sensor requires minimal maintenance. Check monthly to make
sure the radiation shield is free from debris. The filter at the end of the sensor
should also be checked for contaminates. When installed in close proximity to
the ocean or other bodies of salt water, a coating of salt may build up on the
radiation shield, sensor, filter and even the RH chip. A buildup of salt on the
filter or RH chip will delay or destroy the response to atmospheric humidity.
The filter can be rinsed gently in distilled water. If necessary, the chip can be
removed and rinsed as well. Do not scratch the RH chip while cleaning.
4.2.4 Calibration
Recalibrate the temp/RH sensor annually. Obtain an RMA number before
returning this sensor to Campbell Scientific for recalibration.
4.2.5 Troubleshooting
If a problem is suspected, check the sensor cable. Disconnect the connector
and look for damaged pins. Verify that the sensor body is connected to the
sensor head. Under the filter assembly, verify the sensors are connected but
not touching. Try connecting a substitute sensor. Obtain an RMA number
before returning this sensor to Campbell Scientific for repair.
4.3 Rain Gage
4.3.1 General Description
The Texas Electronics Rain Gage (pn TE525-QD) shown in FIGURE 4-2 is an
adaptation of a Weather Bureau tipping bucket rain gage. The rain gage has a
6 inch collector. The rain gage sensor output has a switch closure for each
bucket tip. Level the rain gage by adjusting the rain gage leveling screw. A
post level and compass (pn 16670) ship with the station.
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