1、INCH-POUND MIL-DTL-23659F 10 June 2010 Superseding MIL-DTL-23659E 27 September 2007 DETAIL SPECIFICATION INITIATORS, ELECTRIC, GENERAL DESIGN SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense 1. SCOPE. 1.1. Scope. This specification
2、 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 serv
3、ice 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
4、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. The term electric initiator does not include complete assemblies which have e
5、lectric initiators as subassemblies, but include only the subassemblies themselves. In addition, electric initiators must be safe for handling, transportation, storage and use and must not deteriorate to a degree, which would render their performance or safety doubtful under normal service handling,
6、 adverse storage and transportation. RF susceptibility requirements and tests have not been included in this specification. Implicit in the one watt and one ampere maximum no-fire requirements of this specification is the recognition of the hazards of electromagnetic radiation to ordnance (HERO). Th
7、is one watt and one ampere requirement in conjunction with other design requirements stated herein does not solve the HERO problem; however they do serve as a means of reducing hazards from all spurious electric sources including electromagnetic radiation. General requirements for weapon systems to
8、preclude HERO are established in MIL-STD-464. Comments, suggestions, or questions on this document should be addressed to DEPARTMENT OF THE NAVY, Indian Head Division, NSWC, Code E11G3, Document Control, 4072 North Jackson Road Suite 106, Indian Head, MD 20640-5115 OFFICIAL BUSINESS, or emailed to a
9、manda.pennnavy.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil/. AMSC N/A FSC: 1377 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. Provided by
10、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-23659F - 2 -1.2. Classification. Initiators covered by this specification are divided into two classes: Class A Includes initiators that are capable of being actuated within one second (exclusive of delay e
11、lement time, if present) from a 28 2 volt source capable of delivering not less than 10 amperes. Class B Includes initiators that are not capable of being actuated within one second (exclusive of delay element time, if present) from a 28 2 volt source capable of delivering not less than 10 amperes.
12、All requirements for exploding foil initiators used in fuzes or other safety sensitive applications are contained in Appendix A. 2. APPLICABLE DOCUMENTS. 2.1. General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include docum
13、ents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3, 4, or 5 of
14、 this specification, whether or not they are listed. 2.2. Government documents. 2.2.1. Specifications, Standards, and Handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documen
15、ts are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-202 Electronic and Electric Component Parts MIL-STD-331 Fuze and Fuze Components, Environmental and Performance Tests For MIL-STD-464 Electromagnetic Environmental Effects, Requirements for Systems MIL-STD-81
16、0 Environmental Engineering Considerations and Laboratory Tests (Copies of these documents are available online at https:/assist.daps.dla.mil/ or from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia PA 19111- 5094.) 2.2.2 Other Government documents, drawings,
17、and publications. This section is not applicable to this document. 2.3 Non-Government publications. This section is not applicable to this document. 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes
18、precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-23659F - 3 -3. REQUIREMENTS. 3.1. Approval for Use of Ini
19、tiators by Service Personnel. Before any initiator or device utilizing an initiator can be used by Service personnel, it must be approved by the cognizant Safety Authority. Approval for Service use will be granted only after it has been demonstrated that the initiator has met all the requirements of
20、 this specification and adequate documentation for procurement as Government furnished equipment is completed and the release to production form has been authenticated. Interim approval can be granted prior to availability of documentation provided it has been demonstrated that the initiator has met
21、 all the requirements of this specification. Interim approval shall not exceed six months. 3.2. General. The requirements for design given in this section are considered to be the minimum requirements to which electric initiators shall be subjected. 3.3. Design. 3.3.1. General. The initiator shall b
22、e of the simplest and most efficient design (consistent with the originally proposed use) for the widest possible variety of applications. It shall be as simple and safe to assemble and install as practicable. All inert and explosive materials shall be referenced by approved Government specification
23、s where possible. Proprietary materials shall not be used unless specifically approved in writing from the cognizant Safety Authority. 3.3.2. Internal Free Volume. The internal free volume shall be minimized consistent with good design practice. 3.3.3. Weight. The weight of all initiators shall be m
24、inimized consistent with good design practice. 3.3.4. Inert Materials. Selection of inert materials shall satisfy the environmental, strength, and weight requirements set forth in the specifications for the unit of intended application. Materials which are nutrients for fungi shall not be used unles
25、s specifically approved by the cognizant Safety Authority. 3.3.5. Contacts. The design shall include a provision for shorting all contacts to each other. In the case of pins, a shorting cap shall be supplied, and in the case of leads, the ends shall be bared for purpose of twisting together. Once th
26、e initiator is assembled, the contacts shall be shorted (with leads folded to avoid open loops) at all times except for tests of functional purposes. Where two or more contacts are present, per initiator, coding shall be provided for purpose of identification. 3.3.6. Sealing. The initiators shall be
27、 sealed and shall pass the leakage requirement of 3.3.14, environment requirements of 3.5 and functional requirements of 3.6 specified in 4.1.2.3, 4.6 and 4.7. 3.3.7. Bridge Material. Carbon shall not be used as bridge material unless specifically approved by the cognizant Safety Authority. Provided
28、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-23659F - 4 -3.3.8. Bridge Circuit Insulation and Insulation Barrier. The bridge circuit shall be electrically insulated from the case except in those instances where an insulated bridge initiator is not
29、 compatible with the device of intended application. A continuous insulation barrier shall be provided between the case and any explosive, propellant or pyrotechnic material which is in contact with the bridge circuit. The barrier shall be of a material having high electric resistivity and dielectri
30、c strength. 3.3.9. Bridge Circuit Resistance, Bridge Circuit Continuity or Dielectric Withstanding Voltage. The initiator shall be designed such that the measurement of bridge circuit resistance, bridge circuit continuity, or application of dielectric withstanding voltage when tested as specified in
31、 4.4.1 and 4.4.2 will not dud, adversely affect, or cause the initiator to fire. 3.3.10. Explosive, Propellant, Delay Composition, or Pyrotechnic Material. Any explosive, propellant, delay composition, or pyrotechnic material used in an initiator shall be approved by the cognizant Safety Authority.
32、3.3.11. Marking. Marking, where applicable, shall be non-defaceable (normally stamp or etch) through normal handling and use and shall include designation, lot number, date of manufacture, and manufacturers identification. 3.3.12. Radiographic Examination. Each initiator shall be subjected to radiog
33、raphic examination such as X-ray, neutron bombardment, gamma rays etc. as specified in 4.1.2.2. Radiographic plates shall be identified by date, initiator part number, lot number and serial number. 3.3.13. Performance Reliability. The initiators shall meet all performance requirements at a reliabili
34、ty of not less than 99 percent at a confidence level of 95 percent. The method of analysis shall be in accordance with 4.1.4. 3.3.14. Leakage. The initiators shall pass a dry gas leak test. Initiators which exhibit a leak rate in excess of 10-5cc per second of air at a pressure differential of 1 0.1
35、 atmosphere shall be considered defective. The leak test shall be conducted as specified in 4.1.2.3. 3.4. Electrical Characteristics. 3.4.1. Dielectric Withstanding, Voltage. Each initiator produced under a contract shall be subjected to a dielectric withstanding voltage of 500 volts DC for 60 secon
36、ds. The leakage current shall not exceed 0.1 milliampere. The test shall be conducted as specified in 4.4.1. Initiators which exhibit a leakage current in excess of that stated above shall be considered defective and discarded. 3.4.2. Bridge Circuit Resistance or Bridge Circuit Continuity. 3.4.2.1.
37、Initiators with or without Bridge Circuit Gap. For each initiator produced under a contract the bridge circuit resistance or bridge circuit continuity (whichever is applicable) of each bridge circuit shall be as specified in 4.4.2. 3.4.2.2. Initiators with Conductive Mix Materials. If conductive mix
38、 materials are used, the conductive mix resistance measurement requirement shall be as specified by the cognizant Safety Authority. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-23659F - 5 -3.4.3. Maximum No-Fire and Minimum 50 Millisecond
39、All-Fire Stimuli. 3.4.3.1. General. For purposes of specifying maximum no-fire and minimum 50 millisecond all fire stimuli, initiators covered by this specification are divided into two Classes: “Class A“ and “Class B“. 3.4.3.1.1. Class A. Includes any initiator that is capable of being actuated wit
40、hin one second (exclusive of delay element time, if present) from a 28 2 volt source capable of delivering not less than 10 amperes. 3.4.3.1.2. Class B. Includes any initiator that is not capable of being actuated within one second (exclusive of delay element time, if present) from a 28 2 volt DC so
41、urce capable of delivering not less than 10 amperes. 3.4.3.2. Maximum No-Fire Stimuli, Class A 3.4.3.2.1. Power-Current. The initiator shall not fire within 5 minutes when subjected to a current of 1 ampere minimum per bridge with an associated power of 1 watt minimum per bridge. The initiator shall
42、 meet this requirement at 70 5F and 220 5F. The test method shall be as explained in 4.4.3.1. 3.4.3.2.2. Static Discharge. The initiator shall not fire or dud when subjected to the 25000 volt simulated human electrostatic discharge of 4.4.3.2. The initiator shall meet this requirement at 70 5F and a
43、 relative humidity of 50 percent or less. 3.4.3.2.3. Stray Voltage. The initiator shall be capable of withstanding the effects of a stray voltage environment without pre-igniting (firing). The initiator shall meet this requirement at 70 5F. The test method shall be as described in 4.4.3.3. 3.4.3.3.
44、Minimum 50 Milliseconds All-Fire Stimulus, Class A. The minimum 50 millisecond all-fire stimulus as defined in 6.3.7 shall be measured as described in 4.4.4. The initiator shall meet this requirement at 70 5F, - 80 5F, and 225 5F. 3.4.3.4. Maximum No-Fire Stimuli, Class B. 3.4.3.4.1. Parameter(s). T
45、he maximum no-fire stimulus as defined in paragraph 6.3.9 shall be determined as specified in paragraph 4.4.5.1. 3.4.3.4.2. Static Discharge. The initiator shall not fire or dud when subjected to the 25000 volt simulated human electrostatic discharge of 4.4.3.2. The initiator shall meet this require
46、ment at 70 5F and a relative humidity of 50 percent or less. 3.4.3.5. Minimum 50 Millisecond All-Fire Stimuli, Class B. The requirements for the minimum 50-millisecond all-fire stimulus as defined in 6.3.7 shall be as specified in 4.4.6. 3.4.4. Bridge Circuit Resistance Subsequent to Actuation Class
47、 A and B. If there is a requirement that a fired initiator shall have a minimum open circuit resistance after firing, then the cognizant Safety Authority shall specify the open circuit resistance requirement and the method of test shall be that given in 4.5. Provided by IHSNot for ResaleNo reproduct
48、ion or networking permitted without license from IHS-,-,-MIL-DTL-23659F - 6 -3.5. Environmental. 3.5.1. Forty Foot Drop. To ensure fail-safe capability, the initiator shall not fire when dropped from a height of 40 feet as specified in 4.6.1 and shall be safe for handling and disposal. 3.5.2. Six Fo
49、ot Drop. The initiator shall not fire when dropped from a height of 6 Feet as specified in 4.6.2. After being subjected to the drop test, the initiators shall meet the design performance requirements when test fired. 3.5.3. Shock. The initiator shall be capable of withstanding shock conditions as specified in 4.6.3. After being subject to the shock test, the initiator shall meet the design performance r
