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|  MIL-R-83407B
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
Test
Inspection and
paragraph
paragraph
disposition
Subgroup I
4.5.23
3.29
Screening (when specified) -------------
4.5.3
3.6
Dielectric withstanding voltage ---------
100 percent
4.5.4
3.7
Insulation resistance ----------------------
inspections.
4.5.5
3.8
DC coil resistance -------------------------
Discard all failed
4.5.6
3.9
Pickup and dropout voltage -------------
relays
4.5.7
3.10
Coil power dissipation (when specified)
4.5.8
3.11
Contact resistance -------------------------
4.5.9
3.12
Operate and release time ----------------
Subgroup II
100 percent
inspections.
Visual and mechanical examination
Discard all failed
4.5.1
3.1, 3.3, 3.4,
(external) 2/ ----------------------------------
relays
3.26, and 3.30
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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