MIL-PRF-83500A
4. VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein are classified as follows:
a.
Qualification inspection (see 4.3).
b.
Conformance inspection (see 4.5).
c.
Periodic group C inspection (see 4.5.2.1)
4.2. Inspection conditions. Unless otherwise specified, all inspections shall be performed in accordance with the
test conditions specified in the "GENERAL REQUIREMENTS" of MIL-STD-202, except relative humidity shall not
exceed 75 percent. Unless otherwise specified (see 3.1), accuracy of all test voltage measurements shall be within
±2.0 percent of specified voltage.
4.2.1 AC measurements. AC measurements shall be made at a frequency of 120 ±5 Hertz (Hz). The magnitude
of the ac voltage shall be equal to or less than 1.0 volt root mean square (rms). The dc bias voltage shall be 2.2
+0.0, -1.0 volts for all ac measurements. The ratio of ac voltage to dc bias voltage shall be such that no reversal of
dc voltage will occur across the capacitor.
4.2.2 Reference measurements. When requirements are based on comparative measurements made before and
after conditioning, the reference measurement shall be considered the last measurement made at 25°C±3°C prior to
beginning of conditioning. Unless reference measurements have been made within 30 days prior to the beginning of
conditioning, they shall be repeated.
4.2.3 Power supply. The power supply used for life testing shall have a regulation of ±2 percent or less of the
specified test voltage.
4.3 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable to the
Government (see 6.3) on sample units produced with equipment and procedures normally used in production.
4.3.1 Sample size. The number of capacitors to be subjected to qualification inspection shall be as specified in
table I, or in the appendix to this specification.
4.3.2 Inspection routine. The sample shall be subjected to the inspections specified in table I, in the order shown.
Two sample units shall be subjected to the visual and mechanical inspection (internal). The remaining sample units
shall be subjected to the subsequent inspections of group I. The sample shall then be divided as specified in table I
for groups II to VII inclusive, and subjected to the inspections for their particular group.
4.3.3 Failures. Failures in excess of those allowed in table I shall be cause for refusal to grant qualification
approval.
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