TM 11-6625-486-14&P
Section II. INSTALLATION
Six Batteries BA-30 are to be installed in a metal drawer
2-3. Installation of
Equipment
at the top of the frequency meter front panel (marked
The location of the frequency meter is not limited to any
BATTERIES). A rectangular metal plate covers the
particular area or climatic condition. Provide adequate
drawer opening. Install the batteries as follows:
shelter to prevent water, dirt, and sand from entering the
unit when the front cover is off. Maximum operating
a. Loosen the knob that secures the metal plate
accuracy will be obtained if the frequency meter is
and pull the drawer out of the front panel.
operated in surrounding temperature within the range of
b. Observe the battery polarity diagram printed on
- 4 . to +125 (--20 to +52 .
F
F
C
)
the top of the drawer. Lift the top cover of the drawer
and insert the six batteries in the same polarity
2-4. Installation of Batteries
sequence as indicated in the battery diagram.
c. Replace the drawer and tighten the knob.
Figure 2-2. FR-149(*)/USM-159, battery compartment, with case partly removed.