User's Manual
24
Temperature Range
The operational temperature range is from -22°F to +140° F (-30C
to +60C). In addition, the unit can be stored at temperatures from
-40°F to +158°F (-40C to +70C). Although the unit is designed to
be rugged, do not leave it in direct sunlight or in a parked vehicle in
the sunlight for extended periods.
Batteries perform best at room temperature. The battery also has a
very stable capacity as temperature rises above the human comfort
level. However, cold temperatures cause battery life to drop and the
colder the temperature the greater the reduction in available battery
life. Under very cold conditions (-22°F / -30C and below), you can
expect your battery life to be shortened considerably. When
working in very cold conditions, consider carrying a fully charged,
spare battery in a warm place for easy replacement. The battery
performance will improve by keeping both the unit and the spare
battery warm (for instance, keeping them inside your coat).
Safe Use of Your Unit
Carrying the unit
Due to radio frequency emissions, it is unsafe to operate the radio
with the unit in a holster, dangling from a lanyard, or with any
method that keeps the powered unit in very close proximity to the
head or torso. For safe operation, carry the unit in your hand with
the antennas located at least 20 cm (~8 inches) from the head or
torso. See the following illustration for the correct and incorrect
way to operate the unit.
Correct Incorrect