MIL-PRF-32516
equipment is operating for 4 hours. Following the 4 hour arid heat operating soak,
perform the satisfactory operation test and compare the results with test (a) in accordance
with 4.5.3. No alignment or adjustment of other than the operating controls shall be
permitted throughout the test specified.
e. Test (e). The temperature is maintained at 71 °C. The equipment is not operating for 4
hours. Following the 4 hour hot storage soak, the temperature is lowered to 23 °C. For an
additional 4 hours the equipment is maintained at these conditions. Operate the test item
for the warm-up period recommended by the manufacturer. Perform the satisfactory
operation test and compare the results with test (a) in accordance with 4.5.3. No
alignment or adjustment of other than the operating controls shall be permitted
throughout the test specified.
4.5.6.1.2 Procedure, humidity cycle. The humidity cycle testing follows immediately
after the testing of 4.5.6.1. This procedure consists of 5 days of temperature humidity cycling,
with each day's cycle consisting of the profile displayed on Figure 2. Satisfactory operational
tests are performed at the times indicated on the figures with a diamond symbol, noted as (a), (b),
and (c) (as applicable). The following Notes 1 through 4 apply:
a. Note 1. A satisfactory operational test (at normal room ambient conditions) shall
be conducted prior to and at-the-conclusion of the five-day humidity test.
b. Note 2. During the humidity cycle, the diagnostic equipment is only operating
during the warm-up period and the satisfactory operational test.
c. Note 3. The satisfactory operation tests, as annotated by (a), (b), and (c) shall each
be performed at least once each during the 5 days of humidity cycling, at the
indicated times. Satisfactory operation tests (a) and (b), as appropriate, shall be
performed at any of cycles 2, 3, 4, or 5. Satisfactory operation tests (c) shall be
performed at least at Cycle 5. Satisfactory operation tests may also be performed at
any, or all cycles at the indicated times.
d. Note 4. To accommodate varying times for completing satisfactory operational
tests, the cycle timing after a test maybe adjusted to allow a return back to the regular
profile timing. However, a minimum 4 hour dwell time prior to period of operation
should be observed.
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