TM 55-1680-351-10
b.
Equipment operated at low temperatures should be kept in low
temperature storage when not in use. Store the equipment in a shipping
carton and cover the carton with water-repellent material.
c.
When the equipment is
to be operated at freezing
temperatures, perform the following procedure before operating the
equipment.
NOTE
When operational conditions using Battery BA-
15681UR include temperatures below 50° F., the
radio set and spare battery should be carried
inside flight clothing to prevent cold soaking.
The battery will not supply sufficient power to
operate the radio if permitted to cold soak for
extended periods of time at freezing or below
freezing temperatures. Therefore, the user
should initiate use of radio at low temperatures
with a battery that has been warmed. Batteries
should be rewarmed as soon as possible after
use to insure reliable operation of the radio. The
following exposure times of the battery at the
temperatures indicated are recommended:
3-19
