the temperature of moist air falls to a degree at which it can no longer
hold the amount of water vapor it contains, the excess of water turns to
liquid, or condenses. When
the ground cools at night, dew or frost is the form of condensation.
Condensation taking place on the dust particles in the air is
fog: that taking place in the upper regions of the air becomes a cloud,
and when the condensation is great enough, the drops fall as rain.
The air inside the phone enclosure can also condensate. Surface
conduit should enter from the bottom or back
of an enclosure (never from the top).
For protection against condensation, in
addition to the Mil Spec coating of electronic boards, a moisture
resistant material lines the inside surface of the phone enclosure
protection an optional low voltage heater is available.
the "L" shape design of the heater plate encompasses
the electronics of the telephone.
Pt 800-1080, Low
Voltage Heater can be purchased with the phone or in the future, as an