solarium, in a wine cellar, or even where rare books or
antiques are kept.
Rain Gauge (Optional) Location
- in the open, away from overhanging trees
- well clear of the house or other structures that might block
blowing rain
- easily accessible for periodic inspection and cleaning
Junction Box Location
- must be indoors
- must be close to an ac outlet, so the ac adapter cord can
reach it
- a vertical orientation is preferable to minimize the possibility
of dust getting into the junction box
If you will not require extension cables (that is, if the external
sensors are each close enough to the control unit location) it is
usually best to locate the junction box within 8 feet of the
control unit.
Extension Cables
Normally it is best not to extend the total cable length from the
temperature sensor to the keyboard display unit beyond 33 feet
(the 25-foot temp sensor cable plus the 8-foot junction box
cable). Longer cables tend to increase the temperature
reading slightly. For example, a total length of 193 feet (using
four 40-foot extension cables) can increase temperature
readings about 1.5
°
F.
There is no problem extending the anemometer/wind vane
cable or optional rain gauge cable to 200 feet or more. Be sure
the extension cable used is correctly wired - if in doubt, proper
extension cables may be obtained from Peet Brothers
Company.
The Outdoor Humidity/Temperature Sensor cable length should
be kept as short as practical, but extension up to 100 feet will
not degrade performance.
Instead of extending more than one sensor cable, it may be
possible and more economical to place the junction box further
from the keyboard/display unit, using a longer junction box
cable.
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