Campbell Scientific CVS4200 / BVS4300 Stationary Samplers - Manual (Page 35)

CVS4200 / BVS4300 Stationary Samplers
7.1.3 Freezing Conditions
If the sampler is located outdoors in freezing conditions, we recommend a
BVS4300 with a factory installed heater and insulation.
As the interior floor of the cabinets is not insulated, an added
insulating factor is to fill the cavity under the cabinet between
the mounting legs. This can best be accomplished using 5 cm (2
in) foam board (available from your local building supply store). NOTE
Intake hose should be positioned to have as little horizontal distance as
possible, so that no water can collect in the line and freeze.
In extreme cold conditions the intake hose should be
insulated and/or heated. CAUTION
If the hose is positioned mostly vertical, the most prone point of freezing is
where the hose enters the frozen water source.
7.2 Power Line/Wiring Considerations
A noise free or clean line from primary power is highly
recommended to supply the CVS/BVS sampler. Never run
wiring in the same conduit as the aforementioned or
together with any telephone line(s). CAUTION
Bring power from main distribution panel along a path that does not parallel
any existing power wiring to motors, solenoids, or contactors.
When sampler power line must cross existing power lines, do so at right
angles.
Wiring to remote/external functions should avoid all AC
power lines if possible and/or run in shielded cable
terminating the shield at the AC ground terminal on the
sampler main terminal block, or at the remote site, but not
both. CAUTION
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