MIL-DTL-23659F
4.3.3. Final Design Configuration and Same Production Run. Only initiators of final
design configuration and from the same production run shall be subjected to engineering design
testing.
4.4. Test Methods.
4.4.1. Dielectric Withstanding Voltage. To determine if the initiator meets the dielectric
withstanding voltage requirements of 3.3.9 and 3.4.1, a dielectric withstanding volt age of 500 ±
25 volts DC shall be applied for 60 seconds between pairs of pins or leads in all combinations
prior to assembly of the bridge and between the shorted pins or leads (all pins or leads shorted to
each other external to the initiator) and the case after complete assembly of the initiator. In each
test, the leakage current shall be measured with an accuracy of 5 percent. These tests shall be
conducted in accordance with MIL-STD-202 Method 301.
4.4.2. Bridge Circuit Resistance or Bridge Circuit Continuity. To determine if the
initiator meets the requirements of 3.3.9 and 3.4.2.1, the test method shall be as follows: For an
initiator which does not contain a bridge circuit gap the resistance of each bridge circuit shall be
measured with an accuracy of one percent using a test which subjects the bridge circuit to a
current of less than 50 milliamperes. These tests shall be conducted in accordance with MIL-
STD-202, Method 303 except that the measurement shall be made at or corrected to 70°F. For
an initiator which does contain a bridge circuit gap as defined in 6.3.5 the bridge circuit
continuity, excluding the gap, shall be determined using a test circuit which subjects the bridge
circuit to a current of less than 50 milliamperes.
4.4.3. Maximum No-Fire Stimuli, Class A
4.4.3.1. Power Current. To determine if the initiator meets the power current stimulus of
3.4.3.2.1, a direct current of not less than one ampere supplying a minimum of one watt shall be
applied to the bridge circuit for a period of at least five minutes. For an initiator having more
than one bridge, the current shall be applied to all bridge circuits. The test current shall be
regulated throughout the period of application to within 2 percent. If a rectified current is used,
the ripple content shall not exceed 5 percent rms of the test current. The initiator shall be
conditioned at 70 ± 5°F or 225 ± 5°F as appropriate (see Table I) for a period of 12 hours.
4.4.3.2. Static Discharge. To determine if the initiator meets the requirements of
3.4.3.2.2 or 3.4.3.4.2, a 500 ± 5 percent picofarad capacitor charged to 25000 ± 500 volts and
5000 ± 5 percent or 500 ± 5 percent ohm resistor shall be connected in a 5 microhenry total
inductance series circuit between pairs of pins or leads in all combinations and between the
shorted pins or leads (all pins or leads shorted to each other external to the initiator) and the case
of the initiator. The series connection shall be maintained for 60 seconds. All of the initiators
shall be tested using the 5000 ± 5 percent ohm resistor, and then using the 500 ± 5 percent ohm
resistor. Switching in this circuit shall be accomplished by bringing together two 0.5 ± 0.05 inch
spherical metal electrodes from an initial separation of 3 inches in air. Each series test shall
constitute a separate test. Initiators used for this test shall be temperature conditioned for a
minimum time of 12 hours at 70° ± 5°F.
4.4.3.3. Stray Voltage. To determine if the initiator meets the requirements of 3.4.3.2.3,
each initiator shall be subjected to 2000 pulses of direct current. Each pulse shall be of 300
milliseconds duration and pulse rate shall be 2 per second. Each pulse shall have a minimum
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