Campbell CS705, Instruction Manual

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CS705 Snowfall Adapter
4
6. Installation
6.1 Siting
Choose a site that is easily accessible throughout the winter.
The CS705 Snowfall Adapter and associated rain gage 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 gage should be natural
vegetation or gravel. Avoid mounting the gage over concrete or paved
surfaces.
The under catch of winter precipitation by antifreeze-based gages is directly
related to wind speed. Errors due to wind can be minimized by properly siting
the gage. The preferred gage 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 center of the gage orifice to the surrounding obstructions should be
maintained. FIGURE 6-1 illustrates the proper siting of a gage.
Gages sited improperly and subjected to high winds will under catch winter
precipitation generating erroneous data. An improperly sited gage subjected to
high winds can be damaged by the wind.
FIGURE 6-1. Proper gage siting
6.2 Mounting Pole
A user-supplied mounting pole or Campbell Scientific CM300-series stainless-
steel mounting pole can be used to mount the CS705 away from the tripod or
tower.
CM300-series poles can be embedded directly into a concrete foundation
(FIGURE 6-2 ) or used with a pedestal kit. Campbell Scientific offers a j-bolt
pedestal kit, a short-leg (23 in) pedestal kit, and a long-leg (39 in) pedestal kit
(see FIGURE 6-3 ).