Campbell Scientific RAWS-H Remote Automated Weather Station - Manual (Page 10)

RAWS-H Remote Automated Weather Station
• areas where snow drifts occur
• low places holding standing water after rains
3.3 Precipitation
A rain gage should be located over an open level area covered by short grass,
or where grass does not grow, the natural earth surface. Level the rain gage.
3.4 Solar Radiation
A solar radiation sensor should be located to avoid shadows on the sensor at
any time. Orient the solar radiation sensor where the solar radiation sensor
faces the equator minimizing the chance of shading from other weather station
structures. Reflective surfaces and sources of artificial radiation should be
avoided. Level the solar radiation sensor.
3.5 Wind Speed and Direction
A wind sensor should be located over open level terrain and at a distance of at
least ten times (EPA) the height of any nearby building, tree, or other
obstruction.
3.6 Barometric Pressure
The CS100 barometric pressure sensor can be mounted to the back plate inside
the RAWS environmental enclosure.
3.7 Fuel Moisture and Fuel Temperature
The fuel moisture and fuel temperature sensor should be left outside at the field
site continually exposed to the same conditions as forest fuels. The fuel
moisture and fuel temperature dowel rods absorb and desorb moisture from its
surroundings. Install the probes horizontally on the mounting stake and face
the sensors towards the equator above a representative forest floor duff layer.
Place the sensor away from foot traffic areas.
4. Sensor Wiring
4.1 Air Temperature and Relative Humidity
The temperature/RH sensor attaches to the connector labeled TEMP/RH; this
connector is color coded orange. This sensor is internally wired from the
RAWS connector panel to the CR1000 datalogger.
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