MIL-DTL-21604F
4.8.13 Moisture resistance (see 3.17). Switches shall be tested in accordance with method 106 of MIL-STD-202.
The following details shall apply:
a.
Mounting: Switches shall be mounted on a corrosion-resistant metal panel with the shaft in the horizontal
position.
b.
Initial measurements: Not applicable.
c.
Polarization: During steps 1 to 6 inclusive, a polarization voltage of 100 volts direct current (V dc) shall be
applied between two terminals tied together on opposite sides and adjacent to a through bolt, or a terminal
adjacent to a grounded metal portion if no through bolting is used and the metal panel. Polarization voltage
shall also be applied to two other adjacent terminals elsewhere on the switch section. One section of each
switch shall be so tested. The negative polarity shall be applied to the metal panel.
d.
Steps 7a and 7b are not applicable.
e.
Load voltage: Not applicable.
f.
Final measurements: Immediately after the conclusion of the test and while the switches are still in the
humidity chamber, insulation resistance shall be measured as specified in 4.8.7, unless otherwise specified
(see 3.1). Unless otherwise specified (see 3.1), at the end of the drying period, insulation resistance shall
again be measured as specified in 4.8.7.
Within 24 hours after the test, the switches shall be examined for evidence of corrosion, breaking, cracking,
spalling, or loosening of terminals. A movement of the terminal within the confines of the terminal anchoring device
will be permitted provided continuity of electrical contact is not impaired. Mounting and terminal hardware shall be
removable at the end of the test.
4.8.14 Salt atmosphere (corrosion) (see 3.18). Switches with their mounting hardware, assembled with their
mounting means, shall be tested in accordance with method 101 of MIL-STD-202. The following details shall apply:
a.
Test condition: B.
b.
Measurements after exposure: Not applicable.
After the test, switches shall be examined for evidence of excessive corrosion. Mounting and terminal hardware
shall be removable at the end of the test.
4.8.15 Seal (applicable to style JF switches only) (see 3.19). Before conducting the test, all gaskets which can
normally be replaced in service shall be disassembled from the switch and then reassembled with the switch. The
switch shall then be mounted in a test enclosure by the switch's normal mounting facility and the test enclosure
submerged under a 6-foot head of water, or submerged in water and subjected to external air pressure equivalent to
a 6-foot head of water, for a period of 1 hour. During this test, the switch shaft shall be rotated through its normal
travel limits at least five times. There shall be no evidence of leakage.
Subsequently, the switch shall pass the tests of 4.8.6 and 4.8.3. The following details shall apply:
Test duration: The test duration shall be 90 days
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order
(see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel
need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are
maintained by the Inventory Control Point's packaging activities within the Military Service or Defense Agency, or
within the military service's system commands. Packaging data retrieval is available from the managing Military
Department's or Defense Agency's automated packaging files, CD-ROM products, or by contacting the responsible
packaging activity.
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