Campbell Scientific TurfWeather Weather Station - Manual (Page 22)

TurfWeather Weather Station
FIGURE 5-1. Example of Ten Times the Height Rule
Another option when obstructions exist is to raise the weather station height
above the obstruction by using mast extensions.
a. If your weather station will be inside a fence to discourage
vandalism, the fence top must be lower than the wind sensors even
if the fence is chain-link.
b. Accurate wind measurements require your weather station to
be located at the highest point in a particular region.
c. The tripod/mast height cannot exceed 312 cm (10 ft).
5.3 Communications Considerations
5.3.1 Direct Communications
Short haul modems enable communication between the weather station and
computer over two twisted pairs of wires. This communication requires the
DCE/DTE switch on the modem to be in the DTE position at the weather
station, and in the DCE position at the computer.
5.3.1.1 Cable Lengths
The maximum distance between modems is determined by baud rate and wire
gage. At 9600 bps, the approximate range is 3.2 km (2 miles) using 24 AWG
wire.
5.3.1.2 Grounding Issues
Outdoor cables may be subject to induced currents due to lightning or other
environmental factors. Therefore, proper grounding is imperative to avoid
NOTE
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