MIL-PRF-24021K
3.5 Environmental.
3.5.1 Environmental service conditions. The external power monitor shall be subjected to the
environmental test conditions of MIL-E-81910 specified as follows.
3.5.1.1 Sand and dust. The external power monitor shall meet all of the performance
requirements of 3.4 when tested in accordance with the dust test of MIL-E-81910.
3.5.1.2 Salt fog. The external power monitor shall meet all of the performance requirements
of 3.4 after being tested in accordance with the salt fog test of MIL-E-81910.
3.5.1.3 Mechanical shock. With the exception of the crash safety test, the external power
monitor shall meet all of the performance requirements of 3.4 after being tested in accordance with
the mechanical shock test of MIL-E-81910.
3.5.1.4 Fungus. The external power monitor shall meet all of the performance requirements of
3.4 after being tested in accordance with the fungus test of MIL-E-81910.
3.5.1.5 Humidity. The external power monitor shall meet all of the performance requirements
of 3.4 when tested to the conditions and at the times specified in the humidity test of MIL-E-81910.
3.5.1.6 Vibration. With the exception of the endurance level testing, the external power
monitor shall meet all of the performance requirements of 3.4 when subjected to the vibration test
for non-engine-mounted components of MIL-E-81910. The external power monitor shall meet all
of the performance requirements of 3.4 after being subjected to the endurance test.
3.5.1.7 Electromagnetic compatibility. The external power monitor shall pass the
electromagnetic compatibility test of MIL-E-81910.
3.5.2 Temperature-altitude.
3.5.2.1 Temperature-altitude (operating). Each protective function of the monitor shall
operate within the limits of 3.4.4 when tested in accordance with 4.4.3.1.
3.5.2.2 Temperature-altitude (non-operating). Each protective function of the monitor shall
operate within the limits of 3.4.4 when tested in accordance with 4.4.3.2.
3.5.3 Burn-in. With applicable nominal voltage and frequency applied, the monitor shall pass
the tests specified in 4.4.4.
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