MIL-C-11272E
4.6 Methods of examination and test.
4.6.1 Visual and mechanical examination. Capacitors shall be examined to verify that the materials, design,
construction, physical dimensions, marking, and workmanship are in accordance with the applicable requirements
4.6.2 Dielectric withstanding voltage (see 3.5). Capacitors shall be tested in accordance with method 301 of MIL-
STD-202. The following details and exceptions shall apply:
Magnitude and nature of test potential: a minimum of 200 percent - 2 percent of the dc rated voltage (see
a.
3.1).
b.
Duration of application of test voltage: Not less than 1 second nor more than 5 seconds.
c.
Points of application of test voltage: Between the terminals.
d.
Limiting value of surge current: Shall not exceed 50 milliamperes (mA).
e.
Examinations after test: Capacitors shall be examined for evidence of damage, arcing, and breakdown.
4.6.3 Barometric pressure (see 3.6). Capacitors shall be tested in accordance with method 105 of MIL-STD-202.
The following details shall apply:
a.
Method of mounting: Not applicable.
b.
Test-condition letter: B.
c.
Tests during subjection to reduced pressure: minimum of 150 percent - 2 percent of the dc rated voltage
(see 3.1) shall be applied between the terminals for not less than 1 second nor more than 5 seconds.
d.
Examinations after test: Capacitors shall be examined for evidence of damage, arcing, and breakdown.
4.6.4 Insulation resistance (see 3.7). Capacitors shall be tested in accordance with method 302 of MIL-STD-202.
the following details shall apply:
a.
Test potential: A dc potential equal to a minimum of the dc rated voltage - 2 percent of dc rated voltage
(see 3.1).
b.
Points of measurement: From terminal to terminal. (Condensed moisture may be removed by a blast of
air.)
4.6.5 Capacitance (see 3.8).
4.6.5.1 Qualification inspection. Capacitors shall be tested in accordance with method 305 of MIL-STD-202. The
following details shall apply:
Test frequency - 1 MHz ±200 kHz when the capacitance is 1,000 pF or smaller, and 1 kHz ±100 Hz when
a.
the capacitance is greater than 1,000 pF.
Limit of accuracy - Shall be ±0.2 percent or ±0.2 pF, whichever is greater.
b.
4.6.5.2 Conformance inspection. Capacitors shall be tested in accordance with method 305 of MIL-STD-202.
The following detail shall apply:
Test frequency - 1 kHz ±100 Hz, or 1 MHz ±200 kHz. Capacitance measurements made at 1 kHz shall be
a.
referred to measurements made at a frequency of 1 MHz.
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