MIL-R-5757J
yt Contact dynamic characteristics (see 3.10.5).
4.6.8.5.1 Contact bounce (see 3.10.5.1). Contact bounce shall be measured on each contact set using an oscilloscope or other acceptable means approved by the qualifying activity. The trace shall show contact switching at operate and release and appropriate timing markers when using an oscilloscope. Rated voltage (or current) shall be applied to the coil. Contacts shall be loaded with 6 V dc maximum or peak ac at 10 mA maximum. After high level rated load life and intermediate current tests, contact bounce shall be measured at 100 mA maximum at 28 V dc maximum. A contact bounce shall be considered any occurrence equal to or greater than 90 percent of the open circuit voltage with a pulse width of 10 µs or greater. The circuit shown on figure 7, or equivalent, shall be used.
4.6.9 Thermal shock (see 3.11). Relays shall be tested in accordance with method 107 of MIL-STD-202. The following details and exceptions shall apply:
a. Special mounting: Relays shall be suspended in the test chamber by twine, test socket, or other nonheat-conducting material. Test leads may be used for mounting; however, they shall not exceed the diameter or cross section of the device lead. (NOTE: When test sockets are used, the surface of the header shall not directly contact with the surface of the socket and the leads of the socket shall not exceed the diameter or cross section of the device lead).
b. Test condition: B, except exposure time at temperature extreme during the fifth cycle shall be for 2 hours each.
c. Measurements at each temperature extreme during step 1 and step 3 of this fifth cycle at the end of each temperature exposure, and with the relays still in the conditioning chamber, the insulation resistance (4.6.6), specified pickup and dropout values (voltages) (4.6.8.2), and operate and release time (4.6.8.4), shall be measured as specified. Specified pickup and dropout values (voltages) shall be measured in any position.
d. Examination after test: Relays shall be visually examined for cracking, peeling, and flaking of the finish, and the dielectric withstanding voltage shall then be measured as specified in 4.6.7.1.
4.6.10 Shock (specified pulse) (see 3.12). Unless otherwise specified (see 3.1), relays shall be tested in accordance with method 213 of MIL-STD-202. The following details and exceptions shall apply:
a. Mounting method: For relays having flanges or studs, mounting shall be by the flanges or studs; and for relays without flanges, mounting shall be by plugging into sockets, or other suitable means approved by the qualifying activity.
b. Test condition: A, B, or C, as applicable (see 3.1).
c. Electrical-load conditions: In each direction of shock, the coil shall be de-energized during two shocks and energized with rated voltage (or current) during one shock.
d. Measurements during shock: Contacts shall be monitored with an adequate test circuit as approved by the qualifying activity. The test circuit shall verify that no opening of closed contacts in excess of 10 µs and no false closure or bridging of open contacts occurs in excess of 1 µs. The contact load shall be 10 mA maximum at 6 V maximum (dc or peak ac).
e. Examination after test: Relays shall be examined for evidence of structural failure or other damage which might impair the operation of the relay.
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