MIL-DTL-9419G
MIL-STD-202. The following details and exceptions shall apply:
a. Mounting: By normal mounting means on a corrosion-resistant metal panel extending beyond
the switch, positioned 15 degree from vertical and uninsulated. Half of the units shall be tested
with the actuator in the upper side of the panel and the other half of the units shall be tested with
the actuator on the under side of the panel.
b. Polarization: During steps 1 to 6 inclusive, a polarizing voltage of 100 volts dc shall be applied
between all terminals tied together and the metal panel. The negative polarity shall be applied
to the metal panel. Steps 7a and 7b are not applicable.
c. Load voltage: Not applicable.
d. Final measurements: At the end of the drying period, dielectric withstanding voltage shall be
measured as specified herein.
e. Examinations during final measurement and after test: Switches shall be examined for evidence
of corrosion, breaking, cracking, or spalling. Hardware shall be removable at the end of the test.
f.
Water: Steam, distilled or de-ionized water shall be used for this test.
g. Switches shall make and free break the rated inductive load for 500 cycles after completion of
this test.
4.7.15 Thermal shock (see 3.5.13). Switches shall be subjected to a temperature of -65°C ± 2°C for
12 hours after which the temperature shall be raised to -55°C ± 2°C and maintained for 2 hours. While at
-55°C switches shall be mechanically cycled for 10 cycles. The temperature shall then be raised to
+85°C ± 2°C for 36 hours. While at +85°C, the switches shall be subjected to the overload test specified
herein.
4.7.16 Altitude (see 3.5.14). Switches shall be operated to make and free-break the inductive load
specified (see 3.1) for 20,000 cycles at a rate of not less than 12 operations per minute at a pressure
altitude of 60,000 feet. There shall be no mechanical or electrical failure or damage which would affect
proper operation. The duty cycle shall be approximately 50 percent on and 50 percent off for resistive,
inductive and motor loads. The duty cycle shall be approximately 30 percent on and 70 percent off for
lamp loads.
4.7.17 Salt spray (corrosion) (see 3.5.15). Switches shall be tested in accordance with method 101 of
MIL-STD-202. The following details shall apply:
a. Test condition A.
b. Measurements after exposure: Not applicable.
c.
Switches shall make and free-break rated inductive load for 500 cycles after the completion of
this test.
4.7.18 Fungus (see 3.5.16). Switches shall be subjected to procedure 1 of MIL-STD-810. At the
conclusion of the test, after allowing a 24 hour drying period, switches shall be subjected to the dielectric
withstanding voltage and then examined for electrical and mechanical damage and electrical continuity.
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