8.
Fasten
the
catch
tube
of
the
CS705
to
the
mounting
pole
using
the
band
clamps
and
storage
mount
(see
11)).
9.
Place
the
pail
below
the
rain
ga
u
ge.
10.
Connect
one
end
of
the
tubing
onto
the
funnel
and
place
the
other
end
of
tubing
in
the
pail.
6.5
Data
logger
programming
Refer
to
the
manual
supplied
with
the
TE525WS
Texas
Electronics
Rain
Ga
u
ge.
The
manual
is
also
available
at
.
7.
Maintenance
The CS705 requires regular site visits. The number of required visits mainly depends on snowfall.
Frequent or heavy snows require more site visits. During site visits, verify the slot in the top of the
overflow tube is free from ice or debris and remove any debris from the catch orifice. If the slot in
the overflow tube becomes plugged, the overflow tube may create a siphon and draw down the
antifreeze level.
The PGE solution gets diluted as precipitation is captured and mixed. Initially, the CS705 is
charged with a pure antifreeze mixture giving it a 1:0 antifreeze to water ratio. The ratio increases
to 1:1 with the equivalent of 8 inches of liquid, 1:2 with about 12.5 inches, and 1:3 with 16 inches.
The 1:1 solution becomes slushy at a temperature of ≈–35°C, the 1:2 solution becomes slushy at
≈–20 °C, and the 1:3 solution at ≈–10 °C (McGurk, 1992). Ratios greater than 1:3 are not
recommended. Refer to
(p. 14) to determine the amount of remaining antifreeze
based on precipitation (water equivalent) recorded.
CS705 Snowfall Adapter
13
