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|  MIL-M-70453A [AR)
Methods of inspection.
4.7
4.7.1 Vibration. Conduct the vibration test with the mount
positioned on an adapter affixed to a standard vibrating machine
that is capable of providing the amplitude and frequency
specified in 3.3.1. The adapter shall position the mount as
specified in 3.3.1 during the vibration cycle. Unless otherwise
specified, the test equipment shall be in accordance with the
"Test Facilities" requirements of MIL-STD-810. The applied
motion shall be in a vertical plane for the time period
specified. Upon completion of the vibration cycle, the mount
shall be removed from the vibration adapter and subjected to the
test in 4.7.4 through 4.7.8. If mount does not comply with any
requirements of 3.4 through 3.8, the mount shall be rejected.
4.7.2 Shock. Conduct the shock test with the mount
positioned on an adapter affixed to a shock test machine. The
adapter shall be capable of holding and positioning the mount as
specified in 3.3.2. The number of shocks and applied directions
shall be as specified in 3.3.2. The shock pulse shape, peak
values, and normal time durations for the positions indicated
shall be a specified in 3.3.2. Position the mount (scale and
knobs) as specified prior to shock testing. Subsequent to the
shock applications (18), the mount shall be removed from the
shock test adapter and subjected to the tests in 4.7.4 through
4.7.8. If mount does not comply with any requirements of 3.4
through 3.8, the mount shall be rejected.
4.7.3 Storage/operating temperature The testing equipment
utilized in this test shall conform to the requirements of MIL-
STD-810. The mount shall be placed in the test chamber and the
temperature of the chamber reduced, over a period of 4 hours plus
or minus 15 minutes, from room ambient temperature. The mount
shall be maintained at this temperature for a minimum of 4 hours.
Upon completion of the 4 hour exposure, and while at -50 degrees
F (-46 degrees C), the mount shall be subjected to the
operability tests in 4.7.8.1 through 4.7.8.6. Upon completion of
the low temperature operability tests, the temperature Of the
chamber shall be raised, over a period of 4 hours plus or minus
15 minutes, to room ambient temperature and the mount allowed to
stabilize at this temperature for 2 hours plus or minus 15
minutes at which time the mount will be subjected to the test of
4.7.8.5. Upon completion of the room ambient temperature test,
the temperature of the chamber shall be raised, over a period of
4 hours plus or minus 15 minutes, to +160 degrees F (+71 degrees
The mount shall be maintained at this temperature for a
c)
q
minimum of 4 hours. Upon completion of the 4 hour exposure, the
temperature of the chamber shall be reduced, over a period of 30
minutes plus of minus 2 minutes, to +145 degrees F (+63 degrees
16
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