MIL-PRF-22E
4.6.1.4 Small quantity production. If no more than 75 resistors of the same style or group of styles, defined for lot
formation (see 4.6.1.1), are produced during a continuous 3-month period, the entire 3-month production may be
submitted as one lot. In case of failure, the entire lot shall be rejected and all units involved shall be subject to
corrective action.
4.6.1.4.1 Disposition of sample units. Sample units which have been subjected to group B inspection shall not be
delivered on the contract.
4.6.2 Noncompliance. If a sample fails to pass group B inspection, the supplier shall take corrective action on the
materials or processes, or both, as warranted, and on all units of product which can be corrected and which were
manufactured under essentially the same conditions, with essentially the same materials, processes, etc., and which
are considered subject to the same failure. Acceptance of the product shall be discontinued until corrective action,
acceptable to the Government, has been taken. After the corrective action has been taken, group B inspection shall
be repeated on additional sample units (all inspection, or the inspection which the original sample failed, at the option
of the Government). Group A inspections may be reinstituted; however, final acceptance shall be withheld until group
B reinspection has shown that the corrective action was successful. In the event of failure after reinspection,
information concerning the failure and corrective action taken shall be furnished to cognizant inspection activity and
the qualifying activity.
4.7 Methods of examination and test.
4.7.1 Visual and mechanical examination. Resistors shall be examined to verify that the materials, design,
construction, physical dimensions, marking, and workmanship are in accordance with the applicable requirements
4.7.2 Dielectric withstanding voltage (see 3.5).
4.7.2.1 Atmospheric pressure. Resistors shall be tested in accordance with method 301 of MIL-STD-202. The
following details and exceptions shall apply:
a. Magnitude of test voltage: 1000 volts root mean square (rms) for resistor styles except RP05, RP06, and
RP07 (see 3.1), which shall be 500 volts rms.
b. Nature of potential: From alternating current (ac) supply at commercial line frequency and waveform.
c. Points of application of test voltage: Between the resistor terminals tied together and the bushing or shaft,
as applicable. For product acceptance inspection, the duration of application of the voltage may be
shortened to 1 second.
d. Examination after test: Resistors shall be examined for evidence of flashover, mechanical damage, arcing,
and insulation breakdown.
4.7.2.2 Barometric pressure. Resistors shall be tested in accordance with method 105 of MIL-STD-202. The
following details and exceptions shall apply:
a. Test condition B.
b. Test voltage during subjection to reduced pressure: 550 volts rms for all resistor styles except RP05,
RP06, and RP07 (see 3.1), which shall be 250 volts rms.
c. Nature of potential: As specified in 4.7.2.1b.
d. Points of application: As specified in 4.7.2.1c.
e. Examination and measurement: As specified in 4.7.2.1d.
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