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MIL-DTL-23659 Initiators, Electric, General Design Specification ForThis specification furnishes general requirements for design and establishes uniform methods for testing electric initiators and electric initiator subassemblies. The purpose of the testing program is to determine the electric characteristics, soundness of mechanical design, output, and resistance to deleterious service environments. For purposes of this specification the term electric initiator includes items classified in FSC 1377 such as hot wire initiators, exploding bridgewire initiators, exploding foil initiators, conductive mix initiators, etc. Electric primers are not covered in this specification. All requirements for in-line initiators used in safety sensitive, non-interrupted energetic materials train applications are contained in Appendix A. Requirements for all other initiators are in the main body of this document.

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MIL-DTL-23659F
TABLE II. VIBRATION TEST SCHEDULE/AXIS
FIGURE 1. VIBRATION TEST LEVELS
4.6.5. Temperature-Shock/Humidity/Altitude. To determine if the initiators meet the
requirements of 3.5.5, the initiators shall be subjected to the temperature-shock/humidity/altitude
test as outlined below.
a. The schedule has been arranged in such a manner that operations are not required
outside normal working hours except for such supervision as may be necessary to insure proper
operation of the test equipment.
b. It is not mandatory that the day/clock time schedule given below be followed:
however, it is mandatory that the time, environmental, and sequence requirements be adhered to.
It is also noted that only two conditioning chambers are required to accomplish this test. No less
than two chambers may be used and still accomplish the temperature shock portion of this test.
If it is desired to use three chambers, it is permissible provided the time, environmental, and
sequence requirements are met. The fluctuations from the specified temperatures shall not
exceed 5°F. When the temperature/altitude chamber door is opened to place test items inside,
the chamber pressure will become atmospheric. The time required to return the chamber
pressure to 0.65 pounds per square inch (psi) shall not exceed 1 hour.
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