Campbell Scientific RAWS-P Remote Automated Weather Station - Manual (Page 13)

RAWS-P Remote Automated Weather Station
19 Clockgood True or False: True after GPS fix and CR1000 clock has been set to match
TX320 clock
20 TimeToXmit Seconds until transmit time. Indicates CR1000 and TX320 are properly setup
and running
21 SWR Standing Wave Ratio (SWR), only after a transmission. Indicates condition of
antenna and cable. SWR should be less than 2.0
22 FwdPower Forward power in dBm, should be about 37
23 RefPower Reflected power in dBm, should be about 25 or less
24 RC_Data Only valid after first transmission. Anything other than zero is a problem
25 Setup_RC Indicates if CR1000 could setup TX320. Zero is success or has not run
3. Station Siting and Orientation
3.1 General Description
Selecting an appropriate site for the RAWS is critical in order to obtain
accurate meteorological data. In general, the site should be representative of
the general area of interest and away from the influence of obstructions such as
buildings and trees.
See Section 8, References, for siting references. NOTE
If any part of the weather station comes in contact with
power lines, you could be killed. Contact local utilities
for the location of buried utility lines before digging or
driving ground rods. WARNING
3.2 Air Temperature and Relative Humidity
A temperature and relative humidity (RH) sensor should be located over an
open level area at least 9 m in diameter (EPA). The surface should be covered
by short grass, or where grass does not grow, the natural earth surface. The
sensor must be housed inside a radiation shield and adequately ventilated.
Situations to avoid include:
• large industrial heat sources
• rooftops
• steep slopes
• sheltered hollow
• high vegetation
• shaded areas
• swamps
• areas where snow drifts occur
• low places holding standing water after rains
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