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|  MIL-I-82877
and the span of serial numbers displayed. Each serial number shall be marked on the case by pen or ink
stamp. Any missing serial numbers are to be identified on the X-rays. Radiographs of the entire
production lot shall accompany the ballistic sample to the activity conducting the production lot
acceptance tests (see 6.2). Defective assemblies found during X-ray review shall be marked on the X-ray
prior to shipment and removed from the production lot.
4.6.4 Leakage test. All sample ignition elements shall be tested with a dry gas leak tester of
sufficient sensitivity to ascertain whether the ignition element meets the requirements of 3.3.5. Failure of
any ignition element subjected to the leakage test shall require 100 percent screening on leakage for the
entire production lot. Defective ignition elements shall be discarded.
4.6.5 No-fire test. The ignition elements shall be tested at standard test conditions. A direct current
of 2 0.04 amperes shall be applied to the ignition element circuit for a duration of 5 0.05 minutes to
determine if the ignition element meets the requirement of 3.3.6.
4.6.6 Electrostatic discharge test. The ignition elements shall be subjected to a simulated human
body electrostatic discharge of 25,000 500 volts in accordance with MIL-I-23659 to ascertain whether
the ignition element meets the requirements of 3.3.7. The simulated human body electrostatic discharge
shall be applied only in the pin to pin mode. Failure of any ignition element subjected to the electrostatic
discharge test shall require rejection of the production lot represented.
4.6.7 Impact shock operation. Six ignition elements from the first article sample shall be dropped
from a height of 8 feet onto a 2-inch thick steel plate embedded in concrete as follows: (1) two ignition
elements with the closure disc facing up, (2) two ignition elements with the closure disc facing down, and
(3) two ignition elements with the long axis parallel to the ground.
4.6.8 Temperature, humidity and altitude cycling. The temperature, humidity and altitude cycling
shall be in accordance with MIL-I-23659. After temperature, humidity and altitude cycling, the ignition
elements shall be fired at +70 5F (see 3.4.2).
4.6.9 Vibration. Twelve ignition elements from the first article sample shall be subjected to
sinusoidal vibration along each of the mutually perpendicular axes. The vibration test levels are specified
on figure 1. Test times shall be 1 hour per axis. This test shall be performed at three different
temperatures (-65 5F, +70 5F, and +200 5F), so that each ignition element will experience 9 hours
total vibration time (see 3.4.3).
4.6.10 Functional test. Sample ignition elements shall be conditioned for a period of 12 to 24 hours
at -89 5F, +70 5F, or +250 5F as specified in tables 1 and 2. The ignition elements shall be fired
within 3 minutes after removal from the conditioning chamber. If any ignition element is not fired within
3 minutes after removal, it should be returned to 70 + 5F for a period of not less than 4 hours prior to
reconditioning. The test ignition elements shall be fired in the reusable test fixture fabricated and
assembled in accordance with Drawing 6610182. Ensure the ignition element is completely threaded into
the reusable test fixture. Lubricate slug and O-ring with MIL-S-8660 lubricant before each firing. The
ignition element shall be electrically initiated with a direct current of 5 0.1 amperes. The time the slug
takes to travel 36 0.5 inches from the face of the block shall be measured to determine if the
requirements of 3.5 are met. After each firing, replace O-ring and shear pin with new ones. Monitor
degradation of slug after each firing, if the slug does not conform to Drawing 6610178, discard the used
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