MIL-DTL-3950J
4.8.15 Salt spray (corrosion) (see 3.6.14). Switches shall be tested in accordance with method 101 of
MIL-STD-202. The following details and exceptions shall apply:
a. Test condition letter - B.
b. Switches shall be dried for 6 hours in a force draft oven at 50°C to 60°C. Following the drying
period, the switches shall be subjected to 10 cycles of operation at the lowest rated dc voltage.
c.
Following the 10 cycles of operation, switches shall be examined for warping, cracking, or
excessive corrosion. Excessive corrosion is defined as corrosion which interferes with electrical
or mechanical performance, or in the case of plated metals, corrosion which has passed through
the plating and attacked the base metal. After the test, mounting hardware shall be readily
removable.
MIL-STD-202. The following details shall apply:
a. Test condition letter - B.
b. Measurements before and after cycling - Not applicable.
c.
Examination after test Switches shall be examined for mechanical and electrical damage and
loosening of fastening devices.
MIL-STD-202. The following details and exceptions shall apply:
a. Mounting - By normal mounting means on a corrosion resistant metal panel positioned 15° from
the vertical. One half the switches shall be mounted with the toggle lever up and the other half
with the toggle lever down. The mounting panel shall have appropriate mounting holes so that
switches are at least 1 inch apart.
b. Polarization - During step 1 to step 6 inclusive, a dc potential of 100 volts shall be applied
between current carrying parts and panel. Negative polarity shal be applied to the panel. Step
7a and step 7b are not applicable.
Final measurements - Following a 24-hour drying period a 25°C ±5°C and 50 ±5 percent relative
c.
humidity, switching characteristics shall be measured as specified in 4.8.4. Switches shall be
examined for breaking, spalling, cracking, or loosening of terminals and shall be electrically
operable.
d. Water - Steam, deionized or distilled water shall be used.
4.8.18 Sand and dust (see 3.6.17), applicable to qualification only. Switches shall be tested in
accordance with method 110 of MIL-STD-202. The following details shall apply:
a. The switches shall be oriented so that the toggle lever seal is exposed to the dust stream.
b. During step 3, the switches shall be mechanically actuated for 2500 cycles at a rate of
14 cpm ± 4 cpm.
c.
Step 3 shall be performed immediately after reaching stabilization in step 2.
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