MIL-PRF-62413B(AT)
4.4.3 Insulation resistance. To determine conformance to 3.4.1, measure the insulation
resistance between the coil and case using an applied potential of 50 V rms.
4.4.4 Dielectric strength. To determine conformance to 3.4.2, 100 V rms shall be
applied between the coil and the case.
4.4.5 Output voltage. To determine conformance to 3.4.3, measure the output voltage
under the conditions specified in table I using a standard test ring.
4.4.6 Phasing. To determine conformance to 3.4.4, the pickup shall be connected to a dc
voltmeter with the positive lead connected to pin A and the negative lead connected to pin B.
When the tip of the pickup is approached by a magnetic object, the metal needle shall deflect.
The connections shall be reversed and the tip again approached with a magnetic object. There
shall be no needle deflection.
4.4.7 Environmental tests. The pickup shall be subjected to the environmental tests
specified herein. After completion of each environmental test, the performance tests specified in
4.4.3 and 4.4.5 shall be repeated.
4.4.7.1 Temperature. To determine conformance to 3.5.1, the pickup shall be tested as
follows:
a. Accelerated aging. Dry the pickup in an air oven and subject it to a temperature of
204 °C (400 °F) for 168 hours.
b. High temperature. Upon completion of the accelerated aging, subject the pickup to a
temperature of 100 °C (212 °F) for 100 hours.
c. Room temperature. Upon completion of the high temperature test, subject the pickup
to a temperature of 25 °C (77 °F) for 8 hours.
d. Low temperature. Upon completion of the room temperature test, subject the pickup
to a temperature of -54 °C (-65 °F) for 30 hours.
4.4.7.2 Altitude. To determine conformance to 3.5.2, the pickup shall be tested as
follows. Subject the pickup to an atmospheric pressure of 31.19 inches of mercury (396 m
(1300 feet) below sea level). Subject the pickup to an atmospheric pressure of 20.01 inches of
mercury (3048 m (10,000 feet) above sea level).
4.4.7.3 Humidity. To determine conformance to 3.5.3, the pickup shall be tested as
follows: subject the pickup to an atmosphere of clear water vapor for a period of 15 days under
the conditions and cycle as specified in table IV. Immediately after 12 hours of the first test
cycle, check the pickup for proper operation with the maximum specified voltage. During the
last cycle of the 15-day test, operate the pickup throughout its entire range of operation under
each of the ambient conditions specified. At the end of the 15-day test, dry the pickup without
forced convection for 12 hours in air at not greater than 21 °C (70 °F) with not less than 50%
relative humidity. At the conclusion of this period, check the insulation resistance and output
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