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|  MIL-N-81497A(AS)
Operational Test - Each equipment shall be operated
4.4.1.2
long enough to permit the equipment temperature to stabilize and to
check sufficient characteristics and record adequate data to assure
satisfactory equipment operation.
Manufacturing Run in Test - Each equipment shall be
4.4.1.3
operated under the conditions specified herein for a period of 10 hours
without failure. A failure shall be defined as anything which causes
malfunctioning of the equipment. Only those adjustments will be permitted--
which can be made by using such controls and adjustments that are
accessible to the operator during the normal use of equipment.
Normal Ground
Altitude
Ambient room
Temperature
Ambient room
Humidity
Any selected frequency within the
Vibration
range of 20 to 30 CPS (excluding
resonant points) and a minimum
amplitude of 3 G's
The equipment shall be vibrated (without vibration isolators) for
a period of 10 MIN prior to the beginning of the 10 hour period of
Where feasible, the equipment shall be operated during
operation.
this vibration period for the purpose of detecting flaws and imperfect
workmanship. Operation within the specified limits of satisfactory
performance is not necessarily required during the vibration period.
The direction of vibration should be vertical to the normal mounting
plane for 5 MIN and lateral to the plane for 5 MIN. Where it is not
feasible to vibrate the equipment in 2 directions the vertical direc-
tion shall be used. During the 10 hour period of operation following
the 10 MIN vibration period, the equipment shall be mechanically
cycled periodically through its various phases of operation. Should
a faulure occur, it should be repaired and the test started over,
except that the 10 MIN 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 equipment. A record sall be kept
of all failures. The 10 hour period specified above may be composed
of two 5 hour periods to conform with standard working hours.
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