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TM 11-5820-890-10-8
5.7.
OTHER OPERATOR PROCEDURES
Battery Life Condition Indicator
5.7a.
Manpack and dismount radios are battery powered. A "Battery Life
MANPACK RADIOS
Indicator" built into the SINCGARS RT will give you an estimate of
battery usage which you must convert into an estimate of remaining
battery life.
During radio assembly, note if the main power battery is new or used. If
DURING ASSEMBLY
it is used, note the number written on the side of the battery.
If battery IS used, upon completion of radio assembly, load battery life
IF USED BATTERY
indicator (number on side of battery). No action required if battery is
new.
Set FCTN to LD, press BATT, note 00 in display, press CLR, enter
battery life indicator number, and press STO.
Battery life Indicator of used battery has now been entered into the
RT
During radio operation, you can determine an estimated status of
main battery power by following these steps.
With FCTN at SQ ON, press BATT and read battery life indicator.
A reading of 11 or higher may mean that your main battery is
nearing exhaustion. (This reading is at best a estimate based on
usage computations by the RT.)
During combat and operational missions, you may want to replace the
IN COMBAT
main battery when the battery life indicator reads 11 or higher for
RT-1523/A/B/C/D (See Figure 5-23), or 1/8 for RT-1523E, or you
may wait until your battery is exhausted before changing it. (One
indicator of a weak manpack radio battery is a signal strength display
reading of 3 or less when you PTT with RF PWR set to HI.)
For training, continue to use your main power battery until it is
FOR TRAINING
exhausted. (This is to save batteries and money.)
Upon completing a mission, when the main battery is to be removed,
RECORDING USAGE
note and record battery life on the side of the battery. The Battery Life
Indicator must be read before FCTN is set to OFF, or battery life
data will be lost.
5-64


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