Campbell CS705, Product Manual

Page: 9 / 27

6. Installation
6.1 Siting
Choose a site that is easily accessible throughout the winter.
The CS705 Snowfall Adapter and associated rain ga
u
ge should be mounted in a relatively level
spot that is representative of the surrounding area. The lip of the funnel needs to be horizontal
and 76 cm (30 in) above the ground or higher to prevent burial by snow. The ground cover
around the ga
u
ge should be natural vegetation or gravel. Avoid mounting the ga
u
ge over
concrete or paved surfaces.
The under catch of winter precipitation by antifreeze-based ga
u
ges is directly related to wind
speed. Errors due to wind can be minimized by properly siting the ga
u
ge. The preferred ga
u
ge
site is in a natural well protected location. To ensure proper catch, an angle of 30° to 45° from a
vertical line drawn through the cent
re
of the ga
u
ge orifice to the surrounding obstructions
should be maintained. FIGURE 6-1 (p. 4) illustrates the proper siting of a ga
u
ge.
Ga
u
ges sited improperly and subjected to high winds will under catch winter precipitation
generating erroneous data. An improperly sited ga
u
ge subjected to high winds can be damaged
by the wind.
FIGURE 6-1. Proper ga
u
ge siting
CS705 Snowfall Adapter 4