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|  MIL-R-5757H
TABLE II. Group A inspection.
Inspection 1/
Requirement
Test method
Inspection
paragraph
paragraph
requirements
A1
Screening, internal moisture
3.5
4.6.2
Internal moisture;
Screening, run-in
3.5
4.6.3
run-in 2/
A2
Dielectric withstanding voltage 3
3.9
4.6.7
Insulation resistance 3
3.8
4.6.6
100 percent
Electrical characteristics 3
3.10
4.6.8
A3
Solderability
3.6
4.6.4
2 samples
A4
3.1, 3.27
4.6.1
Visual and mechanical inspection
(external) 4
100 percent
Seal
4.6.5
3.7
1/ Except as noted in 3/, tests shall be performed in the order shown.
2/ Thirteen relays shall be tested. If there are any failures, the entire lot shall be tested for internal
moisture.
3/ Testing sequence is optional for insulation resistance, dielectric withstanding voltage, and coil
resistance/maximum coil current only.
4/ Minor defects, such as marking, may be reworked. A two piece sample from each lot shall be
mechanically inspected.
4.5.2 Periodic inspections. Periodic inspections shall consist of group B and group C. Except where
the results of these inspections show noncompliance with the applicable requirements, delivery of
products which have passed group A shall not be delayed pending the results of these periodic
inspections.
4.5.2.1 Group B inspection. Group B inspection shall consist of the tests specified in table III and shall
be made on sample units which have been subjected to and have passed the group A inspection.
4.5.2.1.1 Sampling plan. Four sample units shall be selected every three months from the inspection
lots which have passed group A inspection. No failures are allowed.
4.5.2.1.2 Disposition of sample units. Sample units which have been subjected to group B inspection
shall not be delivered on the contract or order.
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