MIL-R-5757J
4.6.12 Acceleration (unless otherwise specified, see 3.1 and 3.14). Relays shall be tested in accordance with method 212 of MIL-STD-202. The following details and exceptions shall apply:
a. Mounting of specimens: As specified in 4.6.10a.
b. Test conditions: Test condition A, 17 G's, unless otherwise specified (see 3.1) (acceleration shall be applied in each direction along three mutually perpendicular axes (x, y, and z) of the specimen; one axis shall be in the direction most likely to cause malfunction). In each direction, the coil shall be de-energized for 5 minutes, rated coil voltage (or current) shall be momentarily applied; and the voltage or current shall be reduced to the maximum ambient pickup voltage as specified (see 3.1) for 5 minutes.
c. Examination after test: As specified in 4.6.10e.
4.6.13 Terminal strength (see 3.15). Relays shall be tested in accordance with method 211 of MIL-STD-202 in accordance with the following, as applicable. Unless otherwise specified herein, two terminals of each discrete design, size, and configuration shall be tested; however, if there is only one of such design, size, and configuration, it shall be tested.
4.6.13.1 Pull test (all terminal types). Terminals shall be tested as specified in test condition A, the force shall be as specified (see 3.1).
4.6.13.2 Bend test (not applicable to plug-in terminals). Terminals shall be tested as specified in test condition letter B (two bends) or C, as applicable. Loads for test condition letter C shall be as specified (see 3.1).
4.6.13.3. Bend test (plug-in terminals of a standard octal base only). The lesser of five or all terminals shall be tested by applying a force of five pounds perpendicular to the axis of the pin within .125 inch (3.17 mm) of the tip of the pin.
4.6.13.4 Twist test (wire lead terminals only). All terminals shall be tested as specified in test condition D, except during application of torsion, each terminal shall be rotated 45 degrees in one direction, then returned to start; rotated in opposite direction 45 degrees, then returned to start. Each terminal shall be subjected to two such rotations and returns. Each terminal shall be held at a point .75 inch (19.0 mm) from the point of emergence from the relay, or terminal end for relays with terminals less than .75 inch (19.0 mm), and in one plane shall be bent 20 degrees ±5 degrees in one direction, then returned to start; bent in opposite direction 20 degrees ±5 degrees, then returned to start. This procedure shall then be repeated in the perpendicular plane. Following these tests, relays shall be examined for evidence of loosening or breaking of the terminals and other damage that could adversely affect the normal operation of the relay.
4.6.14 Magnetic interference (when specified; see 3.1 and 3.16). Relays shall be tested in accordance with
4.6.14.1 or 4.6.14.2, as specified.
4.6.14.1 Uniform-stray-field. The relay shall be mounted by suitable nonmagnetic means within the central volume of the test coil. The critical axis of the relay shall be aligned with the longitudinal axis of the test coil. Pickup, hold, and dropout voltage (or current) shall be measured as specified in 4.6.8.2 in 0 magnetic field and in 100 gauss magnetic field of both polarities.
4.6.14.2 Adjacent-similar-relay. The relay under test and eight similar relays shall be mounted in the same physical orientation by nonmagnetic means, as shown on figure 8. Unless otherwise specified, grid-spaced relays shall be mounted so that all terminals are positioned in the closest possible grid pattern. The spacing between terminals and the tops of adjacent terminals shall be as shown on figure 8, unless otherwise specified. Pickup, hold, and dropout voltage (or current) shall be measured on the relay under test as specified in 4.6.8.2 with the coils of the eight outer relays energized at rated voltage (or current) (the magnetic polarity of each relay shall be similarly oriented). The measurement shall be repeated with the coils of the eight outer relays de-energized.
4.6.15 Contact sticking (reed relays only; see 3.1 and 3.17). Relays shall be energized for 96 hours with 120 percent of rated voltage (or current) applied to the coil. No load shall be applied to the contacts. At the end of this period, without physically disturbing the relay, the coil shall be de-energized and the release time shall be measured as specified in 4.6.8.4. This test may be performed as a part of the coil life test (see 4.6.16).
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