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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

c. Test specimens shall be supported on screen trays or racks so that all areas are exposed

to the prescribed atmospheric conditions at all times throughout the test.

Procedure:

Monday

0800

Place test items in a chamber maintained at +70�F at 50 percent relative

humidity (RH).

1200

Raise chamber temperature to + 160�F and the RH to 95 percent. The

chamber temperature shall reach + 160�F at 95 percent RH not later than

1360.

1600

Remove test items from above chamber and immediately place in a chamber

maintained at - 65�F at a pressure altitude of 70,000 feet. (0.65 psi)

Tuesday

0800

Remove test items from above chamber and immediately place in a chamber

maintained at + 70�F at 50 percent RH.

1200

Remove test items from above chamber and immediately place in a chamber

maintained at - 65�F at a pressure altitude of 70,000 feet. (0.65 psi)

1600

Remove test items from above chamber and immediately place in a chamber

maintained at + 160�F at 95 percent RH.

Wednesday 0800

Reduce chamber temperature to + 70�F at 50 percent RH. The chamber

temperature shall reach + 70�F at 50 percent RH not later than 0900.

1200

Raise chamber temperature to + 160�F at 95 percent RH. The chamber

temperature shall reach + 160�F at 95 percent RH not later than 1300.

1600

Remove test items from above chamber and immediately place in a chamber

maintained at - 65�F at a pressure altitude of 70,000 feet. (0.65 psi)

Thursday

0800

Remove test items from above chamber and immediately place in a chamber

maintained at + 70�F at 50 percent RH.

1200

Remove test items from above chamber and immediately place in a chamber

maintained at - 65�F at a pressure altitude of 70,000 feet. (0.65 psi)

0600

Remove test items from above chamber and immediately place in a chamber

maintained at + 160�F at 95 percent RH.

Friday

0800

Reduce chamber temperature to + 70�F at 50 percent RH. The chamber

temperature shall reach + 70�F at 50 percent RH not later than 0900.

1200

Raise chamber temperature to + 160�F at 95 percent RH. The chamber

temperature shall reach + 160�F at 95 percent RH not later than 1300.

1600

Remove the items from above chamber and immediately place in a chamber

maintained at - 65�F at standard ambient pressure.

d. This schedule shall be followed for a total of 4 weeks (28 days) except that on the

second and fourth weekends the soak time shall be from 1200 on Friday until 0800 on Monday at

a temperature of + 160�F at 95 percent RH. At the conclusion of the temperature-

shock/humidity/altitude test, the test items shall be allocated to the tests specified in Table I.

4.6.6. Cook-Off and High Temperature Exposure.

4.6.6.1. Cook-Off. Four initiators shall be placed in an oven preheated to the highest

temperature which it is estimated that the initiators will withstand for 1 hour. If no initiator

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