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|  MIL-R-83407B
3.27 Soldering. Electrical connections shall be mechanically secure and electrically continuous before and after
soldering.
3.28 Screening (when specified) (see 3.1).
3.28.1 Temperature cycling. Each relay shall be tested as specified in 4.5.23.1.
3.28.2 ARC duration. Each relay shall be tested as specified in 4.5.23.2. The ARC duration shall not exceed 200
microseconds (s) on turn off.
3.29 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
3.30 Workmanship. Relays shall be uniform in quality, and shall be free from cracks, displaced parts, sharp
edges, burrs, and other defects that could affect their life, serviceability, or appearance.
4. VERIFICATION
4.1 Test equipment and inspection facilities. The supplier shall establish and maintain a calibration system in
accordance with ANSI/NCSL Z540-1, ISO-10012-1, or equivalent.
4.2 Classification of inspections. The inspection requirements specified herein are classified as follows:
a. First article inspection (see 4.3).
b. Conformance inspection (see 4.4).
4.3 First article inspection. First article inspection shall be performed at a laboratory acceptable to the
Government (see 6.3) on sample relays produced with equipment and procedures normally used in production.
4.3.1 Sample size. Eleven relays shall be selected at random and subjected to the first article inspection.
4.3.2 Inspection routine. The sample shall be subjected to the inspections specified in table I, in the order shown.
All sample units shall be subjected to group I inspection, except that only 2 sample relays shall be subjected to
solderability, contact noise (when specified), thermal EMF (when specified), and capacitance (when specified).
Upon completion of the group I tests, the sample shall be subdivided as specified in table I for group II, group III, and
group IV.
4.3.3 Defectives. Defective relays in excess of the number allowed in table I shall be cause for refusal to grant
approval.
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