3-10. CARRYING CASE REPAIR
tery pack inserted in the transmitter and one
receiver per paragraphs 3-4 and 3-6. Then per-
form an operational check per paragraph 3-9. If
Local, expedient repair of the carrying case
units check out properly remove batteries then
personnel is authorized,
pack units and batteries for storage. If either
Expedient repair of a cut or gash may be done
unit fails to function properly the most prob-
by use of a piece of olive drab cloth backed tape.
able cause is old batteries, corroded contacts on
More extensive or
permanent repair may be
batteries, or in the unit that did not check out.
undertaken at the discretion of t e officer in
Have battery checked by Organizational
Maintenance per section III. Repeat cleaning
3-11. OPERATOR QUARTERLY
and installation steps per paragraph 3-6,
Repeat operational checks per paragraph 3-9.
If this does not correct the situation, the offend-
All items not in regular service should be
ing unit should be disposed of in accordance
checked out every quarter by having a good bat-
with local regulations.
Section III. ORGANIZATIONAL MAINTENANCE
If necessary, general maintenance is to
The transmitter may not function prop-
erly when used with a pack having a
be done in accordance with the basic
voltage measuring less than 15.0 volts
under load. The lower the battery's volt-
Manual, TM 9-1375-213-12.
age, the lower the power that can be pro-
applies to any other authorized opera-
vided the transmitter.
tions not detailed in this supplemental
voltage reading, voltage must be
checked under load.
3.12. BATTERY/BATTERY PACK
c. Receiver Batteries, Test receiver batter-
ies at room temperature (+ 60°F to + 80°F.
+ 15°C to + 27°C) under load using Test Jack
a. General. The only organizational mainte-
#3 (approximately 6 ohms) of TS 183( )/U.
nance Required for the 122 is testing the bat-
Table 3-1 gives test parameters for the batter-
teries at time of issue. It is intended that this
be done by issuing supply group. Batteries in
ies including expected on-duty life of the bat-
service may also be tested upon request of user
b. Transmitter Pack. Test the pack volts e
at room temperature (+ 60° F to + 80°F +15C)
under load using Test Jack #10 (approximately
. On-duty life is affected primarily by
30 ohms) of TS 183( )/U. A fresh pack will meas-
battery type, battery voltage under
ure 17.0 volts or more under load and is
load, battery condition, temperature,
expected to have an estimated operating life of
and the number of blasting caps
1000 transmitter firings over the temperature
range -25°F (-32°C) to + 125°F (+52°C). A pack
fired. Therefore, under certain cir-
cumstances the actual on-duty life
measuring 16.5 volts under load is expected to
could deviate significantly from the
have an operating life that is one half that of a
expected values given in paragraph 1-
fresh pack under certain circumstances. The
absolute minimum pack voltage under load for
short term useage e is 15.0 volts. In this case the
. A fresh alkaline battery (BA 3030)
operator should obtain a replacement pack as
should measure 1.48 volts under
soon as possible.
load and provide the maximum on-
duty life, (see para 1-11).
receiver will not function properly
when used with a battery having a
voltage measuring less than 1.2V