MIL-DTL-13625F
4.5.6.3 Contact voltage drop. To determine conformance to 3.4.3, the switch shall be tested as
indicated in 4.5.6.3.1. The test shall be conducted in accordance with 4.5.6.3.1.1, if applicable. The
contact voltage drop shall be determined as specified in 4.5.6.3.2.
4.5.6.3.1 Test procedure. Each terminal which is connected to a load in intended operation shall be
connected to the applicable load specified in 4.5.2. Each appropriate terminal shall be connected to a
voltage source. With the switch in each closed position, the voltage drop shall be measured between
each appropriate pair of terminals.
4.5.6.3.1.1 Momentary operation switches. If the switch is of arrangement 1 and, further, is type I or
type IV (momentary operation), the test specified in 4.5.6.3.1 shall be performed with the applicable one
of the following forces applied to the actuating area:
Type I, arrangement 1
-
15 pounds
Type IV
-
40 pounds
40 5 pounds actuating force
Type IV (8328134) only
-
plus 40 5 pounds operating force
4.5.6.3.2 Determination of contact voltage drop. If the switch has leads permanently attached to the
switch body, the contact voltage drop shall be determined by subtracting lead voltage drop from the
measured voltage drop. Otherwise the contact voltage drop shall be considered to be the terminal to
terminal voltage drop (type I, IV, and V switches) or the maximum terminal to terminal voltage drop (type
II or III switches).
4.5.6.4 Electrical overload. To determine conformance to 3.4.4, the switch shall be connected to 150
percent of the applicable load specified in 4.5.2, and operated for 100 cycles as specified in the
applicable requirements of 4.5.4 or 4.5.5.
4.5.6.5 High voltage. To determine conformance to 3.4.5, 440 V root mean square (rms) at 60 cycles
per second (cps) shall be applied for 1 minute to the switch between each appropriate pair of leads with
the contacts in the corresponding open position.
4.5.6.6 Endurance. To determine conformance to 3.4.6, the switch shall be connected to a load as
specified in 4.5.2 and operated for 50,000 cycles in accordance with the applicable requirements of 4.5.4
or 4.5.5. During the test, the switch shall be periodically observed for evidence of malfunction.
4.5.7 Environmental.
4.5.7.1 Salt fog (corrosion). To determine conformance to 3.5.1, the switch shall be subjected to the
salt fog test specified in method 509, procedure I, of MIL-STD-810, except that the duration of the test
shall be 200 hours. Immediately upon completion of this test, the switches shall be rinsed in lukewarm
4.5.7.2 Fungus. To determine conformance to 3.5.2, the switch shall be subjected to the fungus test
specified in method 508, procedure I, of MIL-STD-810, except that the test duration shall be continuous
for 90 days. However, the switches may be inspected periodically for fungus growth.
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