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Table III. Life test sample selection.
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Test Set, Guided Weapon AN/DSM-139C
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Explosive-atmosphere



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MIL-T-85396A(AS)
4.10.4.1 Failure report.  In the event of a failure, the Government Inspector
shall be notified immediately (see 6.2.2).
4.11 Presubmission testing.  No item, part, or complete test set shall be made
available by the contractor until it has been previously tested and inspected
by the contractor and found to comply with all applicable requirements of this
specification and the contract.
4.12 Environmental tests.  The test set shall operate as required when
subjected to the following tests (see 3.3.2.1).
4.12.1 Temperature - altitude.  The test set shall be tested in accordance
with the following.  Adjustment of controls shall be allowed.
These conditions apply with batteries installed and only when not in conflict
with 3.3.2.1.1 and 3.3.2.1.2.
a.
With the test item de-energized, adjust the chamber test conditions to
-40C at 50,000 ft.  After the test item temperature has stabilized,
maintain these test conditions for at least 2 hours. Where it is
possible, without changing the test conditions, the test item shall be
visually inspected for the presence of deterioration which would
impair future operation.
b.
With the test item de-energized, adjust the chamber test conditions to
an altitude at standard ambient.  These chamber test conditions shall
be maintained throughout this step.  The test item shall be operated
at 11.55 Vdc.  The test item shall operate satisfactorily immediately
following the specified warm-up time (see 3.3.3). The above
operational sequence shall be repeated two additional times.
c.
With the test item de-energized, adjust the chamber temperature to
-40C and altitude of 10,000 ft.  The test item temperature shall be
stabilized.  The test item shall be energized at 14.60 Vdc and the
chamber pressure adjusted to simulate 10,000 ft altitude.  Upon
reaching the specified chamber pressure and while maintaining the
chamber temperature, the test item shall be checked for satisfactory
operation (see 3.5.1.2) and the results recorded (see 6.2.2).
d.
Adjust the chamber test conditions to standard ambient conditions at
55C temperature.  After the test item temperature has stabilized, an
operational and performance check of the test item shall be made and
shall meet the requirements of 3.5.1.2.
e.
With the test item de-energized, adjust the chamber test conditions to
85C and standard ambient altitude.  The test item temperature shall
be stabilized and then maintained for 16 hours. At the conclusion of
this time period, where practicable, the test item shall be visually
inspected for any deterioration.
f.
Adjust the chamber test conditions to standard ambient conditions.
After the test item temperature has stabilized, an operational and
performance check of the test item shall be made and the results shall
meet the requirements of 3.5.1.1.

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