MIL-PRF-22097J
4.6.3.2 Subgroup 2. A sample of parts shall be randomly selected with table IX. If one or more defects are found,
the lot shall be reworked or screened and defectives removed. After reworking or screening and removal of
defectives, a new sample of parts shall be randomly selected in accordance with table IX. If one or more defects are
found in the second sample, the lot shall be not supplied to this specification.
4.6.4 Alternate inspection. For the purposes of retention of qualification and conformance inspection (see 4.5 and
4.6), results on identical items covered by MIL-PRF-39035 may be used.
4.6.5 Inspection of preparation for delivery. Sample packages and packs and the inspection of preservation,
packaging, packing, and marking for shipment and storage shall be in accordance with section 5.
4.7 Methods of inspection.
4.7.1 Visual and mechanical inspection. Resistors shall be inspected to verify that the materials, design,
construction, physical dimensions, marking, and workmanship are in accordance with the applicable requirements
4.7.2 DC resistance. Resistors shall be tested in accordance with method 303 of MIL-STD-202 (see 3.7). The
following details shall apply:
a.
Measuring apparatus: The same measuring instrument shall be used for all resistance measurements in
any one test, but not necessarily for all the tests.
b.
Measurement energy for electronic test equipment: The measurement energy applied to the unit under test
O
shall not exceed 10 percent of the 25 C rated wattage times 1 second.
c.
Test voltage for bridges: Measurements of resistance shall be made by using the test voltage specified in
table X. The test voltage chosen, whether it be the maximum or a lower voltage which would still provide the
sensitivity required, shall be applied across the terminals of the resistor. This same voltage shall be used
when ever a subsequent resistance measurement s made.
TABLE X. DC resistance test voltage.
Total resistance nominal
Maximum test voltage
(in ohms)
(in volts)
100
1.0
Over 100 to 1,000 inclusive
3.0
Over 1,000 to 10,000 inclusive
10.0
Over 10,000 to 0.1 megohm, inclusive
30.0
Over 0.1 megohm
100.0
4.7.2.1 Total resistance. The total resistance shall be measured as specified in 4.7.2, between the resistance
element end terminals (terminals 1 and 3 of figure 3) with the contact arm against a stop. The positioning of the
contact arm and terminal shall be the same for all subsequent measurements of the total resistance on the same
specimen (see 3.7.1).
4.7.2.2 End resistance. The contact arm shall be positioned at the extreme counterclockwise limit of mechanical
travel, and the resistance shall be measured as specified in 4.7.2 between the contact arm and the corresponding
end terminal. The contact arm shall be so positioned at the extreme clockwise limit of clockwise limit of mechanical
travel, and the resistance shall be measured as specified in 4.7.2 between the contact arm and corresponding end
terminal. During this test, precaution shall be taken to insure that rated current of the resistance element is not
exceeded. Clockwise and counterclockwise signifies the direction of rotation of the operating shaft when the resistor
is viewed from the shaft end (see 3.7.2).
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