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|  MIL-N-81604C(AS)
4.4.1.2 Operational Test - Each equipment shall be operated long
enough to permit the equipment temperature to stabilize and to
check sufficient characteristics and record adequate data to
assure satisfactory equipment operation.
4.4.1.3 Manufacturing Run-in Test - Each equipment shall be
operated under the conditions specified herein for a period of
*
10 hours without failure. A failure shall be defined as any-
thing which causes malfunctioning of the equipment. Only those
*
adjustments will be permitted which can be made using controls
and adjustments which are accessible to the operator during the
*
normal use of the equipment. This test shall be deleted if the
*
reliability test includes a test on each equipment which con-
sumes at least 10 hours of operation.
Temperature:
Ambient room
Humidity:
Ambient room
Vibration:
Any selected frequency within the range of
*
20 to 30 hz (excluding resonant points)
and a minimum amplitude of 3g
The equipment shall be vibrated (without vibration isolators) for
*
a period of 10 minutes prior to the beginning of the 10-hour
period of operation. Where feasible, the equipment shall be
operated during this vibration period for the purpose of de-
tecting flaws and imperfect workmanship. Operation within the
specified limits of satisfactory performance is not necessarily
required during the vibration period. The direction of vibra-
tion should be vertical to the normal mounting plane for five
minutes and lateral to the plane for five minutes. Where it is
not feasible to vibrate the equipment in two directions, the
vertical direction shall be used. During the 10-hour period of
*
*
operation following the 10-minute vibration period, the equip-
ment shall be mechanically cycled periodically through its
various phases of operation. Should a failure occur, it should
*
be repaired and the test restarted, except that the 10-minute
vibration period need not be repeated when it is certain that
the failure was not a result of the vibration. Should repetitive
failures occur, corrective action shall be taken to eliminate
this defect from future equipment. A record shall be kept of all
*
failures. The 10-hour period specified above may be composed
of two five-hour periods to conform with standard working hours.
*
4.4.2 Sampling Tests - Equipments selected for sampling tests
shall first have passed the individual tests. Equipments shall
be selected for sampling tests by the Government inspector in
accordance with the following:
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