MIL-DTL-82909A (OS)
e. Failure of any battery pack to comply with the requirements of 3.6.6 shall be cause for rejection of
the lot and/or first article.
4.3.13 Firing mechanism test. The battery packs shall be submitted to the firing mechanism test outlined
in MIL-C-83124 with the following requirements:
a. The battery packs shall be divided into three groups. Battery packs, which are to be conditioned
prior to functional testing at 200°F and -65°F, shall be conditioned for at least 4 hours but not more than
24 hours. Battery packs, which are conditioned at 70°F, shall be conditioned for at least 4 hours at 70°F.
Each test shall start within 3 minutes from conditioning chamber removal.
b. Non-Actuation: A pressure of 400 +0, -25 psig air pressure shall be gradually applied through a
0.013-inch orifice to one of the ports of each battery pack, (check valve removed) for 1 minute. The other
inlet port shall be fitted with a pressure transducer to monitor leakage past the check valve.
c. Actuation: A pressure of 650 psig air pressure shall be applied at a rate of approximately 20,000 to
40,000 psig/sec to one port of each battery pack. The other inlet port shall be fitted with a pressure
transducer to monitor leakage past the check valve.
d. Failure of any battery pack to comply with the requirements of 3.6.7 shall be cause for rejection of
the lot and/or first article.
4.3.14 Functional test. Sample battery packs for the functional test shall be conditioned for not less than
4 hours and no more than 24 hours at the specified temperatures. The battery packs shall be removed from
the conditioning chamber and test fired within 5 minutes. If any battery pack is not fired within 5 minutes
after removal, it shall be reconditioned at the specified temperature for an additional 4 hours and then
tested. The battery packs shall be initiated using an activation pressure of 900 +25, -0 psig of air. The
battery pack shall be fired in the battery pack test firing setup shown on Drawing 838AS231. The battery
packs shall meet the requirements specified in 3.6.8.
4.3.14.1 Rise time. The rise time shall be measured from the primer ignition (600 psig) to when the
battery voltage reaches 22 volts when measured before the test firing circuit diodes. Each battery pack shall
meet the requirements of 3.6.8.1.
4.3.14.2 Current. A constant and pulsing currents shall be measured over the first 225 seconds. The
battery pack shall meet the requirements of 3.6.8.2.
4.3.14.3 Voltage. The four voltages shall be measured over the first 225 second before the diodes
indicated on Drawing 838AS231, test firing circuit. Each battery pack shall meet the requirements of
3.6.8.3.
4.3.14.4 Test failure. If a test failure is attributable to an assignable cause, excluding the battery packs,
the original test results shall be discarded and the test reconducted.
4.4 Acceptance criteria. Battery packs shall meet the requirements of 3.6 when tested as specified in
4.3.5 through 4.3.14. The acceptable number of defects is 0 and the rejection number is 1.
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