MIL-C-62F
4.5 Methods of examination and test.
4.5.1 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
(see 3.1, 3.3 to 3.4.3 inclusive, and 3.22 to 3.23.1 inclusive).
4.5.1.1 Internal examination. Capacitors shall be opened and the foils and separator shall be unrolled for a visual
examination of the internal construction. The entire interior, including foils, tabs, and contact area of tab to foil, shall
be examined for corrosion (see 3.3.2).
4.5.2 Solderability (see 3.5) (not applicable to plug-in capacitors and styles CE70 and CE71). Capacitors shall be
tested in accordance with method 208 of MIL-STD-202. The following details shall apply:
a.
Number of terminations of each part to be tested: 2.
b.
Depth of immersion in flux and solder: Leads shall be immersed to within .125 inch (3.18 mm) of the
capacitor body, or to within .125 inch (.318 mm) of the soldered or welded joint, as applicable (see 3.1).
4.5.3 DC leakage (see 3.6). DC leakage shall be measured using the dc rated voltage (see 3.1), applied across
the terminals of the capacitor for a period of 5 minutes with a suitable current-limiting resistor (see 6.10), and dc
milliammeter or microammeter connected in series. The buildup of voltage shall occur within 60 seconds. The dc
leakage shall be measured at the end of the 5-minute period. Measurement accuracy shall be within 5 percent.
4.5.4 Capacitance (see 3.7). Capacitance shall be measured in accordance with method 305 of MIL-STD-202.
The following details shall apply:
Test frequency: 120 5 Hertz (Hz).
a.
Limit of accuracy: Within 2 percent.
b.
c.
Magnitude of polarizing voltage: The application and magnitude of a dc polarizing voltage is optional (see
4.2.2), if no substantial difference is noted between capacitance measurements with and without polarizing
voltage applied. The reading with a polarizing voltage applied shall govern in case of conflict.
4.5.5 Dissipation factor (see 3.8). Dissipation factor shall be determined by a capacitance bridge at a frequency of
120 5 Hz. Measurement accuracy shall be within 2 percent. The application and magnitude of a dc polarizing
voltage is optional (see 4.2.2), if no substantial difference is noted between dissipation factor measurements with and
without polarizing voltage applied. The reading with a polarizing voltage applied shall govern in case of conflict.
Equivalent series resistance may be measured and converted to dissipation factor.
4.5.6 Terminal strength (see 3.9). Terminals shall be tested in accordance with method 211 of MIL-STD-202. The
following details and exceptions shall apply:
a.
Test condition: A, applicable to all except plug-in terminals.
(1)
Applied force: As specified in table VII.
(2)
Direction and duration of applied force, other than axial-wire leads: The pull may be applied in
any direction, including the weakest, at the point where the terminal is normally connected in an
actual circuit. The pull shall be increased gradually to the specified magnitude and held at that
value for at least 10 seconds.
(3)
Direction and duration of applied force, axial-wire leads: The contact shall be made .625 inch
(15.88 mm) from the insulator (case) and the pull shall be applied axially. The pull shall be
increased gradually to the specified magnitude and held at that value for at least 30 seconds.
12
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business