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Table VIII. Sampling tests sample selection |
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|  MIL-G-85231(AS)
Operation within the specified Limits of performance is not necessarily
required during the vibration period. 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 equipment in
two directions, the vertical direction shall be used. During the 10-hour
period of operation following the 10-minute vibration period, the control
group 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 control group. A record shall be kept of all failures (see 6.2.2).
The 10-hour period specified above may be composed of several shorter periods
to conform with standard working hours. This test is not required if a
reliability assurance test is selected which includes a test on each control
grOUp Which consumes at least 10 hours of operation.
4.5.2 Sampling tests. Control groups selected for sampling tests shall
first have passed the individual tests. Control groups will be selected for
sampling tests by the government inspector in accordance with table VIII.
TABLE VIII. Sampling tests sample selection
1/ Sampling Tests are not required when reliability assurance tests are
conducted.
4.5.2.1 Scope of sampling tests. As a minimum, each control group
selected for sampling tests shall be subjected to the following tests:
Complete operational tests at ambient room conditions, making
a.
all necessary measurements to assure that all requirements
have been met.
Operational tests at certain environmental conditions. The
b.
conditions may vary for each control group tested and shall
be based on results of the first article, individual, and
special tests.
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