TM 11-6625-3041-12/TO 33A1-8-908-1
Section IV
OPERATION UNDER UNUSUAL CONDITIONS
2-12. OPERATION IN UNUSUAL WEATHER
Although intended for use inside a heated/air-conditioned shelter, the
SG-1139 is fully ruggedized and will operate under the following environmen-
tal extremes.
Arctic
The SG-1139 can operate at temperatures as low as -25F and
Climates
can be stored at temperatures as low as -7OF.
Extreme cold causes components, especially cables and plastic
components, to become brittle. Permanent damage can result
from mechanical shock to components. Cables can break if
kinked or bent.
When cold equipment is brought into a warm room, moisture
will condense on its surfaces. Before operation, allow
equipment to warm to room temperature, then dry thoroughly
with cloth.
Tropical
The SG-1139 can operate and can be stored at temperatures as
high as +125F.
Climates
q Extreme
heat and humidity cause moisture and fungi, which can
cause improper operation. Keep cover on as much as possible
and ventilate the equipment as often as possible.
q The
SG-1139 can operate and can be stored at temperatures as
Desert
high as +125OF.
Climate
q Wind-blown
sand, dirt, or dust can damage the equipment.
Keep cover on as much as possible.
Salt Air
Salt air can corrode the connectors and controls on the
Keep cover on as much as possible and clean
SG-1139.
surfaces with damp cloth (fresh water).
The SG-1139 can operate at altitudes up to 15,000 feet and
High
Altitudes
can be stored at altitudes up to 40,000 feet.
No special precautions are necessary.
