1、 AMSC N/A FSC 5920 INCH-POUND MIL-DTL-9129F 18 April 2008 SUPERSEDING MIL-DTL-9129E 12 April 2001 DETAIL SPECIFICATION DISCHARGERS, ELECTROSTATIC GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This sp
2、ecification covers the general requirements for aircraft electrostatic dischargers used to reduce radio frequency electromagnetic interference associated with the discharge of aircraft electrostatic charges. 1.2 Military part number. The military part number is constructed as follows: M 9129/09 -01
3、M P Military designator Specification sheet number Dash number (see 3.1) Magnetism (see 3.1) Lighting survivability (see 3.1) 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 documents c
4、ited 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 of documents cited in sections 3, 4 or 5 of thi
5、s 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 documents are
6、 those cited in the solicitation or contract (see 6.2). FEDERAL STANDARDS FED-STD-H28 - Screw-Thread Standards for Federal Services. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-5624 - Turbine Fuel, Aviation, Grades JP-4 and JP-5. MIL-D-9129/9 - Holders, Discharger, Electrostatic. MIL-PRF-87257 - Hy
7、draulic Fluid, Fire Resistant; Low Temperature, Synthetic Hydrocarbon Base, Aircraft and Missile. Comments, suggestions, or questions on this document should be addressed to: Defense Supply Center, Columbus, ATTN: DSCC-VAT, Post Office Box 3990, Columbus, Ohio 43218-3990 or by email CircuitProtectdl
8、a.mil Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-9129F 2 DEPARTMENT OF D
9、EFENSE STANDARDS MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts. MIL-STD-889 - Dissimilar Metals. MIL-STD-1285 - Marking of Electrical and Electronic Parts. (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mi
10、l or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094). 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified he
11、rein. Unless otherwise specified, the issues are those cited in the solicitation or contract. DRAWINGS AIR FORCE 7136810 - Tester Assembly, Static Discharger NAVY NAVAIR 01-S3B-2-3-14-1 - Testing and Troubleshooting, Avionic Systems, Non-acoustical Sensors, Electronic Countermeasures,Navigation, Aut
12、omated Flight Control, and Communications, S3B Aircraft Organizational Maintenance. (Copies of the specifications, standards, and drawings required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting acti
13、vity.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). NATIONAL CONFERENCE OF STANDARDS LABORATORIES (NCSL) NCSL-
14、Z540.1 - Calibration Laboratories and Measuring and Test Equipment, General Requirements for (A Copy of this document is available from http:/www.ncsli.org/ or from the National Conference of Standards Laboratories (NCSL), 2995 Wilderness Place Suite 107, Boulder, Colorado, 80301-5404, United States
15、). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM-D910 - Gasolines, Aviation. (Copies of this document are available online at http:/www.astm.org or from the American Society for Testing Materials, 100 Barr Harbor Drive, West Conshohocken. PA 19428-2959). INTERNATIONAL ORGANIZATION FOR STAND
16、ARDS (ISO) ISO 10012-1 - Equipment, Quality Assurance Requirements for Measuring - Part 1: Metrological Confirmation System for Measuring Equipment. (A Copy of this document is available from http:/www.ansi.org/ or the American National Standards Institute (ANSI), 11 West 42nd Street, New York, NY 1
17、0036-8002). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-9129F 3 RADIO TECHNICAL COMMISSION FOR AERONAUTICS RTCA DO-160D - Environmental Conditions and Test Procedures for Airborne Equipment. (Copies of this document are available online a
18、t http:/www.rtca.org/ or from the Radio Technical Commission for Aeronautics, RTCA, Inc., 1828 L Street, NW, Suite 805, Washington, DC 20036, Tel: 202-833-9339, Fax: 202-833-9434). SOCIETY OF AUTOMOTIVE ENGINEERS SAE AMS 1435 - Fluid, Generic, Deicing/Anti-Icing Runways and Taxiways. (Copies of thes
19、e documents are available online at http:/www.sae.org/ or from the Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein (except for related specificat
20、ion sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accorda
21、nce with the applicable specification sheets. In the event of any conflict between requirements of this specification and the specification sheets, the latter shall govern. 3.2 First article inspection. When specified, dischargers furnished under this specification shall be a product which has been
22、tested and passed all applicable inspections specified in 4.4. 3.2.1 Information to be furnished with sample. The applicable information, outlined in 6.3, shall be furnished with the sample together with any other pertinent information as required by the Government. 3.3 Selection of specifications a
23、nd standards. Specifications and standards for necessary items not specified herein shall be selected to meet the requirements of this specification. Commercial items having suitable properties may be used where no military standard parts exist for the same purpose. 3.4 Materials. Materials shall be
24、 as specified herein and the applicable specification sheet (see 3.1). Materials that are not specifically designated shall be inherently fungus resistant and possess such other overall characteristics as to provide for the furnished discharger to meet the requirements of this specification. Accepta
25、nce or approval of any constituent material shall not be construed as a guarantee of the acceptance of the finished product. 3.4.1 Metals. All metals used in the construction of the dischargers covered by this specification shall be corrosion resistant or protectively treated to resist corrosion in
26、consonance with the performance requirements specified herein. When dissimilar metals are used in contact with each other, protection against electrolysis and corrosion shall be provided. Metal plating or metal spraying of dissimilar base metals to provide similar or suitable abutting surfaces is pe
27、rmitted. Dissimilar metals are defined in MIL-STD-889. 3.4.2 Pure tin: The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin content of discharger components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 p
28、ercent lead, by mass (see 6.5). 3.4.3 Nonmetalic materials. Nonmetallic materials and coatings shall not crack, chip, or otherwise deteriorate under temperature extremes, vibration, shock, and moisture conditions. Current carrying, nonmetallic materials shall provide permanent conductivity to the de
29、gree that will assure that the complete discharger meets the requirements of this specification. 3.5 Design and construction. Dischargers covered by this specification shall be of the design, construction, and physical dimensions specified herein and in the individual specification sheet (see 3.1).
30、3.5.1 Mounting. The type of mounting shall be as specified in the individual specification sheet (see 3.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-9129F 4 3.5.1.1 Adhesives. Dischargers depending upon adhesives for attachment to the
31、aircraft shall be so designed that the tip or body assemblies may be replaced without detachment or replacement of the mounting bracket or base. 3.5.2 Screw threads. Screw threads on removable parts shall be in accordance with FED-STD-H28. 3.6 Performance. Unless otherwise specified (see 3.1), stati
32、c dischargers shall meet the following performance requirements. 3.6.1 Discharge current. Unless otherwise specified (see 3.1), the discharge current shall be not less than 10 microamperes at a potential difference of 40 kV, applied across 6 inch spacing between the discharger tip and the grounded p
33、late as in figure 1. (see 4.6.2.1) 3.6.2 Radio frequency discharge noise. Unless otherwise specified (see 3.1), the radio frequency total noise voltage (root mean square (rms) value of radio frequency generated and coupled by a discharger while it is discharging current at a rate of 50 microamperes
34、shall be a minimum of either 40 dB (for trailing edge types) or 30 dB (for wing tip types) below the simulated trailing edge when measured in accordance with paragraph 4.6.2.2. 3.6.2.1 Noise voltage peaks. Any peaks of noise voltage at discrete frequencies within the passband shall not exceed the me
35、an noise voltage by more than 20 dB, nor shall this level be permitted to occupy more than 10 percent of total passband width. 3.6.3 Continuous discharge. Continuous discharge capability shall be a minimum of 50 microamperes for a period of not less than 24 hours without material breakdown or other
36、damage, and shall be capable of meeting the discharge current, radio frequency noise and direct current resistance requirements subsequent to the continuous discharge test (see 3.6.1, 3.6.2, 3.6.6 and 4.6.2.3). 3.6.4 Power Dissipation (see 3.1). The discharger shall withstand a continuous power of 5
37、 watts for a period of 15 seconds without excessive heating (refer to Figure 2 for applied current requirement). The discharger shall be considered to have failed if: a. The post test discharger resistance exceeds the limits specified in 3.6.6. b. The temperature rise of the discharger during the 15
38、 second application of power exceeds 25C. c. The current flow, as indicated by the oscilloscope in figure 4, shows irregularities of “noise”, other than that directly due to power supply output voltage ripple. d. The post test RF discharge noise exceeds the limits specified in 3.6.2. 3.6.5 Electrica
39、l flashover. The discharger resistance shall remain within specified resistance limits when tested in accordance with 4.6.3. The dischargers shall be capable of meeting the discharge current and radio frequency discharge noise requirements subsequent to the flashover test (see 3.6.1 and 3.6.2). 3.6.
40、6. Direct current resistance. The resistance of dischargers measured from discharge points to discharger mounting base shall be at 25C (see 4.6.4): a. Trailing edge mounted = 6 to 200 megohms. b. Tip mounted = 6 to 120 megohms. c. Resistance shall be measured with a 500 volt minimum megohmmeter. 3.6
41、.6.1 Resistance (-60C to +45C). The resistance of dischargers shall remain within specified limits when measured at the extreme temperatures of -60C and +45C, compared to the resistance measured at 25C (see 4.6.4). Provided by IHSNot for ResaleNo reproduction or networking permitted without license
42、from IHS-,-,-MIL-DTL-9129F 5 3.6.7 Lightning transfer. Dischargers are to be tested for lightning transfer characteristics between the discharger holder section and a simulated aircraft skin (see 4.6.5). RTCA/DO-160D Section 23, zone 2A will be used. The current will be passed through the discharger
43、 holder and into the simulated skin. After the passing of the above current, the discharger and holder assembly (if applicable) shall remain intact (see 4.6.5). 3.6.8 Vibration. Dischargers shall be capable of withstanding high frequency vibration without physical damage when tested as specified in
44、4.6.6. 3.6.9 Shock. Dischargers shall be designed and constructed to withstand specified shock load with no physical damage (see 4.6.7). 3.6.10 Solvent resistance. Dischargers shall show no signs of deterioration from solvent materials when tested as specified in 4.6.8. 3.6.11 Thermal shock. Tempera
45、ture extremes specified in 4.6.9 shall not result in any damage, or alter the function or operation of any of the dischargers covered by this specification. 3.6.12 Salt atmosphere (corrosion). There shall be no evidence of excessive corrosion. Excessive corrosion is defined as that which interferes
46、with the electrical or mechanical performance, or in the case of plated metals, corrosion which has passed through the plating and attacked the base metal. There shall be no warping, cracking, or other electrical or mechanical damage to the discharger (see 4.6.10). 3.6.13 Tension. All dischargers sh
47、all be so designed and constructed that their attachment into end components and onward into the mounting adapter (if any) shall withstand without damage a load applied as in 4.6.11. The discharger tip assembly shall similarly withstand a load of 10 pounds. 3.6.14 Sand and dust. When tested as speci
48、fied in 4.6.12, dischargers shall be capable of withstanding sand and dust. There shall be no evidence of excessive abrasion that will interfere with the electrical or mechanical performance. There shall be no evidence of warping, cracking or other electrical or mechanical damage to the discharger (
49、see 4.6.12). 3.6.15 Magnetism. In order for a discharger to qualify as a non-magnetic discharger, it must pass the test specified in 4.6.13. 3.6.16 Lightning survivability. In order to qualify as a lightning survivable discharger a unit must be tested per RTCA/DO-160D Section 23, zone 1A. Following completion of this test, the unit shall remain intact and shall meet the requirements of paragraphs 3.6.1, 3.6.2 and 3.6.6 (see 4.6.14). 3.7 Marking. Dischargers shall
