MIL-R-83407C
4.4 Conformance inspection.
4.4.1 Inspection of product for delivery. Inspection of product for delivery shall consist of the group A inspection.
4.4.1.1 Inspection lot. An inspection lot, as far as practicable, shall consist of all relays covered by a single specification sheet produced under essentially the same conditions within a period not to exceed 4 weeks, or 500 units, whichever occurs first, and offered for inspection at one time.
4.4.1.2 Group A inspection. Group A inspection shall consist of the examinations and tests specified in table II.
4.4.1.2.1 Sampling plan. The tests in table II shall be performed on each relay offered for inspection.
4.4.1.2.2 Rejected lots.
a. Subgroup 1. If over 10 percent of an inspection lot fails, the relays contained in that lot shall be rejected
and shall not be resubmitted for inspection. Relays which have failed to pass subgroup 1 tests to which they have been subjected shall be removed from the lot and discarded.
b. Subgroup 2. If an inspection lot is rejected, the contractor may rework it to correct the defects, or screen out the defective units and resubmit the lot for inspection.
4.4.1.2.3 Disposition of sample units. Sample relays which have passed all the group A inspections may be delivered on the contract or purchase order if the lot is accepted and the sample relays are still within the specified electrical tolerances.
TABLE II. Group A inspection.
Examination or test 1/ |
Requirement paragraph |
Test paragraph |
Inspection and disposition |
Subgroup I Screening (when specified) ------------- Dielectric withstanding voltage --------- Insulation resistance ---------------------- DC coil resistance ------------------------- Pickup and dropout voltage ------------- Coil power dissipation (when specified) Contact resistance ------------------------- Operate and release time ---------------- |
3.28 3.6 3.7 3.8 3.9 3.10 3.11 3.12 |
4.5.23 4.5.3 4.5.4 4.5.5 4.5.6 4.5.7 4.5.8 4.5.9 |
100 percent inspections. Discard all failed relays |
Subgroup II Visual and mechanical examination (external) 2/ ---------------------------------- |
3.1, 3.3, 3.4, 3.26, and 3.30 |
4.5.1 |
100 percent inspections. Discard all failed relays |
1/ The order of performing the examinations and tests shall be as listed, except that the order of performing the electrical characteristics tests is optional.
2/ Physical dimensions and weight shall be checked on only two relays selected at random from
each lot.
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