TM 11-5820-489-10
TO 31R4-2GRA6-31
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
2-7. GENERAL
The Control Group is designed to be operated in all types of temperature,
humidity or weather conditions. But, special precautions may have to be taken
when these conditions go to extremes. This section gives procedures to
follow in extreme weather conditions.
Handle all equipment with care.
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Keep equipment warm with the following insulations:
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q Kimpack
q Spun glass fiber material
q Animal
skins
q Woolen material
Keep frost from microphone of handset. Cover with rubber or plastic
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diaphram provided.
If ice gets into Handset, remove cap and take ice out.
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Cold equipment may sweat. Bring to room temperature, then dry
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thoroughly.
To prevent failure of batteries, protect them from the cold.
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Refer to TB 43-0118.
2-9. OPERATION IN TROPICAL CLIMATES
Problems that may occur:
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q Extreme
wetness
q Fungus growth
q Poor air flow
q High humidity forming water on equipment
q To avoid these conditions:
q Keep equipment dry.
q Use heat from light bulbs or heaters to dry equipment.
q Refer to TB 43-0118.
2-10. OPERATION IN DESERT CLIMATES
Use dustproof containers to keep sand, dust, and dirt out of
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equipment.
Protect moving parts such as the generator and switches.
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Cover equipment in containers with wet sacking.
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Line walls of container with heavy paper.
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NEVER tie telephone lines, or other wiring connections to tents
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(sudden winds can break the lines).
Grit will damage switches and generator. Regular PMCS help avoid this
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dirt/grease build up.
Refer to TB 43-0118.
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