MIL-PRF-31032/1B
3.7.5 Electrical requirements.
3.7.5.1 Continuity. When tested in accordance with 4.7.5.1, unless otherwise specified, there shall be no circuit
whose resistance exceeds 10 ohms. For referee purposes, 0.5 ohm maximum per 25.0 mm (.98 inch) of circuit
length shall apply.
3.7.5.2 Isolation (circuit shorts). When tested as specified in 4.7.5.2, the resistance between mutually isolated
conductors shall be greater than 2 megohms.
3.7.6 Environmental requirements.
3.7.6.1 Moisture and insulation resistance. When tested as specified in 4.7.6.1, the printed board test specimen
shall have a minimum of 500 megohms of resistance between conductors. After the test, the printed board test
specimen shall not exhibit blistering, measling, or delamination in excess of that allowed in 3.5.1.
3.7.6.2 Thermal stress. After undergoing the test specified in 4.7.6.2, the printed board test specimen shall be
inspected in accordance with 4.7.2 and shall meet the requirements of 3.6.
3.7.6.3 Thermal shock. After undergoing the test specified in 4.7.6.3, the printed board test specimens shall meet
the following requirements:
a.
Visual inspection: When inspected as specified in 4.7.1, there shall be no evidence of plating cracks,
blistering, crazing, or delamination in excess of that allowed in 3.5.
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b.
Resistance change: The change in resistance between the first high temperature cycle and the last high
temperature cycle shall not be more than 10 percent.
c.
Microsection: The printed board test specimen shall be microsectioned and inspected in accordance with
4.7.2 and the requirements specified in 3.6 shall be met.
3.8 Marking. Marking shall be in accordance with MIL-PRF-31032.
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3.9 Workmanship. Printed boards shall be processed in such a manner as to be uniform in quality and shall be
free from defects that will affect life, serviceability, or appearance.
4. VERIFICATION
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4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
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a.
Qualification inspection (see 4.2).
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b.
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c.
Capability verification inspection (see 4.6).
4.1.1 Sampling and inspection. Sampling and inspection shall be in accordance with MIL-PRF-31032, and as
specified herein.
4.1.2 Standard test and inspection conditions. Unless otherwise specified by the applicable test method or
procedure, inspections and tests may be performed at ambient conditions.
4.2 Qualification inspection. Unless otherwise specified by the TRB approved qualification test plan, qualification
inspection shall be in accordance with MIL-PRF-31032 and as specified herein.
4.2.1 Qualification test vehicles. The qualification test vehicle(s) to be subjected to qualification inspection shall be
in accordance with the TRB approved qualification test plan and the applicable qualification test vehicle
specification(s).
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