MIL-DTL-24317B
4.8.4 Contact resistance (see 3.7). Switches shall be tested in accordance with the following:
4.8.4.1 Switch terminals (see 3.7.1). Switch terminals shall be tested in accordance with method 307
of MIL-STD-202. The following details and exception shall apply:
(a) Method of connection Connections shall be made by clamps or shall be soldered.
(b) Test current 100 milliamperes (ma).
(c) Maximum open-circuit test voltage 6 ± 1 volts, direct current (vdc).
(d) Number of activations prior to measurement Not applicable.
(e) Number of test activations Three activations per pole.
(f) Number of measurements per activation One measurement. (The average of the 3 readings
shall be considered the contact resistance.)
(g) Points of measurement Measurements shall be made across the terminals of each switching
circuit with the switch contacts closed. Measurements shall be made for all poles in a switch.
4.8.4.2 Lamp terminals (when applicable, see 3.7.2). Lamp terminals shall be tested in accordance
with method 307 of MIL-STD-202. The following details and exceptions shall apply:
(a)
Method of connection Connections shall be made by clamps or shall be soldered.
Preparation for test An applicable lamp retention adapter (see figure 1) shall be used.
(b)
(c)
Test current 100 milliamperes (ma).
(d)
Number of adapter insertions Three.
(e)
Number of measurements per insertion One measurement between the lamp terminals. (The
average of the three readings shall be considered the contact resistance.)
4.8.5 Simultaneity (see 3.8). Using suitable measuring equipment, simultaneity of switch contacts in
any station shall be measured at an actuation rate of 2.0 inch per second. Only one of each five stations
in a multistation switch shall be tested.
(a) Test-condition letter A, except the upper temperature for lenses shall be 71°C +3° -0°C, unless
otherwise specified (see 3.1).
(b) Measurements after cycling Switches shall be examined for mechanical or electrical damage.
When applicable, lenses shall be examined for discoloration or deformation.
4.8.7 Vibration, high frequency (see 3.10). Switches shall be tested in accordance with method 204 of
MIL-STD-202. The following details and exceptions shall apply:
(a) Mounting of specimens Normal mounting means.
(b) Test-condition letter A.
(c) Test and measurement during vibration Contact chatter shall be continuously monitored during
vibration in accordance with method 310 of MIL-STD-202.
(d) Examination after test Switches shall be examined for mechanical damage or impairment of
operation.
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