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|  MIL-T-85378(AS)
4.5.1.3 Manufacturing run-in test. Each test set shall be operated under
the conditions specified herein for a period of six hours without failure. A
failure shall be defined as anything which causes malfunctioning of the test
set. Only those adjustments will be permitted which can be made by using
controls and adjustments that are accessible to the operator during the normal
use of the test set.
Ambient room
a.
Temperature
Ambient room
Humidity
b.
Any selected frequency within the
Vibration
c.
range of 20 to 30 cps (excluding
resonant points) and a minimum
amplitude of 3g's
The test set shall be vibrated (without vibration isolators) for a period of
10 minutes prior to the beginning of the six-hour period of operation. Where
feasible, the test set shall be operated during this vibration for the purpose
of detecting flaws and imperfect workmanship. The direction of vibration
should be vertical to the normal mounting plane for five minutes and lateral
to that plane for five minutes. Where it is not feasible to vibrate the
test set in two directions the vertical direction shall be used. During the
six-hour period of operation following the 10-minute vibration period, the
equipment shall be mechanically cycled periodically through its various phases
of operation. Should a failure occur, it should be repaired and the test
started over, except that the 10-minute vibration period need not be repeated
when it is certain the failure was not a result of the vibration. Should
repetitive failures occur, corrective action shall be taken to eliminate this
defect from future test sets. A record shall be kept of all failures. The
6-hour period specified above may be composed of two three-hour periods to
conform with standard working hours.
4.5.2 Sampling tests. Test sets selected for sampling tests shall first
have passed the individual tests. Test sets shall be selected for sampling
tests by the government inspector in accordance with table VIII.
4.5.2.1 Scope of sampling tests. As a minimum, each test set selected
for sampling tests shall be subjected to the following tests:
a.
Complete operational test at ambient room conditions, making
all necessary measurements to assure that all applicable
specification requirements have been met.
b.
Operational test at certain environmental conditions. The
conditions may vary for each equipment tested and shall be
based on results of the first article, individual, and
special tests.
c.
Manufacturing run-in test specified in 4.5.1.3 except that
the test duration shall be 120 hours with no restriction on
the number of failures. However, each failure shall be
analyzed as to cause and remedial action necessary to reduce
the possibility of its recurrence in future test sets.
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