MIL-PRF-32516
4.5 Test methods.
4.5.1 Test conditions. Unless otherwise specified in the detailed test herein, the
inspection in 4.5 shall be performed under conditions a through d. Ambient conditions within
the specified ranges need not be controlled. Measurements and observations shall only be taken
after the diagnostic equipment has been turned-on and allowed to warm up for10 minutes (see
3.9.6).
a.
Temperature: 25 °C ±10 °C
b.
Humidity: 20 to 70 percent relative humidity.
c.
Altitude: Sea level.
d.
Power: See Table I.
4.5.2 Installation of test item in test facility. The diagnostic equipment shall be installed
in the test facility in a manner that will simulate service usage, making connections and attaching
instrumentation as necessary. Plugs, covers, and inspection plates not used in operation, but used
in servicing, shall remain in place. When mechanical or electrical connections are not used, the
connections normally protected in service shall be covered. For tests where temperature values
are controlled, the test chamber shall be at standard ambient conditions when the test item is
installed. The diagnostic equipment shall be operated to determine that no malfunction or
damage was caused due to faulty installation or handling. The requirement for operation
following installation of the test item in the test facility is applicable only when operation is
required during exposure to the specified test.
4.5.3 Pretest. Prior to proceeding with the environmental tests, the test item shall be
operated under standard ambient conditions (see 4.5.1) to evaluate the performance
characteristics of the diagnostic equipment. This test is used to establish the level of performance
of the diagnostic equipment at the outset of testing, prior to any environmental tests. This test is
performed before, during, and after the environmental tests, whenever a satisfactory operational
test is required. Degradation of the diagnostic equipment performance shall be noted if it exceeds
any bound established in the purchase description.
4.5.4 Performance check during test. When operation of the diagnostic equipment is
required during the test exposure, the pretest (see 4.5.3) shall be performed to determine whether
the test exposure is producing changes in performance when compared with pretest qualification.
4.5.5 Post-test inspection. At the completion of each environmental test, the diagnostic
equipment shall be inspected in accordance with pretest (see 4.5.3). The diagnostic equipment
shall have failed the test when any of the conditions specified in a through g occur:
a. Monitored functional parameters deviate beyond acceptable limits established in 4.5.3.
b. Catastrophic or structural failure.
c. Mechanical binding or loose parts, including screws, clamps, bolts, and nuts, that
results in component failure or a hazard to personnel safety.
d. Malfunction.
e. Degradation of performance beyond limits established in the purchase description.
f. Any additional deviations from acceptable criteria established before the test.
g. Deterioration, corrosion, or change in tolerance limits of any internal or external parts
that could in any manner prevent the test item from conforming to operational service or
maintenance requirements.
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