Campbell CS705, Руководство по эксплуатации продукта

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3. Initial inspection
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Upon receipt of the CS705, inspect the packaging and contents for damage. File damage
claims with the shipping company.
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Immediately check package contents against the shipping documentation. Contact
Campbell Scientific about any discrepancies.
4. Overview
The CS705 is manufactured by Campbell Scientific and is based on the paper “Measuring Winter
Precipitation with an Antifreeze-Based Tipping Bucket System” presented at the 1996 Western
Snow Conference (McCaughey and Farnes, 1996). The design possesses inherent delays and is
not suitable for real time precipitation measurements. Three design factors contribute to
measurement delays:
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air/antifreeze mixture temperature
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surface tension in the overflow tube
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precipitation form
All precipitation falling into the catch tube eventually flows through the overflow tube and is
measured by the tipping bucket ga
u
ge. A delay of minutes is expected for liquid precipitation so
long as a minimum volume of water (≈0.03 inches) is reached. A delay of several hours (up to
ten) is expected for snow. Lightest density snow at very cold temperatures has the longest delay.
The CS705 converts the TE525WS Texas Electronic Rain Ga
u
ge, into a year- round precipitation
ga
u
ge. The CS705 is intended for use only during winter. Like any sensor, optimum performance is
obtained by regular site visits. Any antifreeze-based precipitation ga
u
ge orifice is susceptible to
capping or snow bridging.
NOTE:
The CS705 is coated with a smooth black coating to minimize surface adhesion and maximize
solar loading, but snow bridging may still not occur.
4.1 Antifreeze
Campbell Scientific recommends a 1:1 mixture of propylene glycol and ethanol (PGE). PGE is
available from Campbell Scientific in a package of four, one-gallon containers. Antifreeze can
CS705 Snowfall Adapter 2