MIL-DTL-13625F
TABLE VI. Measuring instrument tolerances.
Measuring instrument
Accuracy - maximum
0.50 percent
Voltmeter DC
0.50 percent
Ammeter DC (multi-range)
0.50 percent
Millivoltmeter
4.5.2 Load. Electrical loads specified in the individual test procedures shall be in accordance with
4.5.2.1 or 4.5.2.2 as applicable. Switches shall be designed to conduct continuously, the load currents
specified on the applicable military standard or drawing.
4.5.2.1 Type I, IV, and V switches. The ampere rating shall be as specified on the applicable military
standard or drawing.
4.5.2.2 Type II and III switches. The noted lamp load specified on the applicable military standard or
drawing shall be used with type II and III switches. Indicator lamps shall not be considered loads.
4.5.3 Switch operation. When cycling is required, power driven switch operating mechanism shall be
used to apply a constant force within the operating force ("pressure") requirements specified on the
applicable military standard or drawing, to the switch operating area or handle. Type V switches shall be
operated by alternately pulling and releasing the handle (the handle need not be twisted).
4.5.3.1 Switch operating definitions. See 6.3
4.5.4 Cycle for type I, IV, and V switches. A cycle shall consist of the following sequence: 3.0 0.1
seconds in "on" position, 3.0 0.1 seconds in "off" position (10 cycles per minute).
4.5.5 Cycle for type II and III switches. A cycle shall consist of the following sequence: 1.0 0.1
seconds in "on" position, 5.0 0.1 seconds in "off" position (10 cycles per minute.)
4.5.5.1 Electrical circuit for type II and III switches. An "on" position and an "off" position shall be
provided for cycling, by connecting one (outgoing) terminal which is normally connected to a load in
intended operation, to the load specified in 4.5.2. The appropriate (feed) terminal shall be connected to
the source. The remaining terminals shall not be connected.
4.5.6 Performance.
4.5.6.1 Overload force. To determine conformance to 3.4.1, the overload force specified therein shall
gradually be applied to the switch actuating area or switch handle, as applicable, in the direction of travel.
The force shall then be released. This process shall be repeated four (more) times.
4.5.6.2 Operating force. To determine conformance to 3.4.2, a force shall gradually be applied to the
switch actuating area or switch handle, as applicable, until the switch reaches full travel position (class A
switches), or actuate (class B switches). The force shall then be released. This process shall be
repeated nine (more) times. The average force required to actuate the switch or to cause it to reach full
travel position, as applicable, shall be computed and recorded.
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