1、MIL-STD-2142A(SH) 6 August 1990 SUPERSEDING 1 June 1983 (See 6.6) DOD-STD-2142(SH) MILITARY STANDARD MAGNETIC SILENCING CHARACTERISTICS, MEASUREMENT OF (METRIC) AMSC N/A FSC 1905 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reprodu
2、ction or networking permitted without license from IHS-,-,-MIL-STD-2342A 37 m 7777733 0073376 7 m FOREWARD 1. This Military Standard is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense, 2.
3、 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101, by using the self-addressed Standardization Doc
4、ument Imprvement Proposal (DD Form 1426) appearing at the end of this document or by letter. 3. The testing of materials and equipment in accordance with the requirements of this standard will ensure that magnetic characteristics have been considered and incorporate dinto the manufacture of material
5、s and design of equipment. This will result in compatibility of materials and operation of equipment in a complex magnetic environment. ii Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Paragraph 1 . 1.1 1.1.1 1.2 .1. 2.1 1.2.2 1.3 2 . 2.1 2.1.1 2.1
6、.2 2.2 2.3 3 . 3.1 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 3.1.9 4 . 4.1 4.2 4.3 4.4 4.5 4.5.1 4.5.2 4.5.3 5 . 5.1 5.1.1 5.1.2 5.1.3 5.1.4 CONTENTS SCOPE Scope Application . Classification . Field Sources Test Methods Method of reference . APPLICABLE DOCUMENTS . Government documents Specific
7、ations and standards Other Government publication Non-Government publications . Order of precedence . DEFINITIONS . General magnetic silencing terms Eddy current magnetic field . Electrical conductivity . Ferrous magnetic field . Magnetic field . Magnetic permeability IACS Stray magnetic field Tests
8、ample . Test specimen GENERAL REQUIREMENTS . Government.furnished material and equipment . Material or equipment tested in accordance with procedures not specified in this standard . Variations in test methods of sections 100. 200. and 300 . Testing of identical material and equipment . Test facilit
9、ies . Location Test equipment . Descriptions of magnetic test facilities . . DETAILED REQUIREMENTS Test conditions . Accessory equipment precaution . Excess personnel and equipment . Test coils (sections 100 and 200 Power supply characteristics (section 300 test methods) . test methods) . 3 3 3 3 3
10、3 3 4 4 4 4 4 4 4 5 5 iii Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2142A(SH) CONTENTS (Continued) Page Paragraph Figure 5.2 5.2.1 5.2.2 5.2.3 5.24 5.2.5 5.3 5.3.1 .5.3.2 5.4 5.4.1 5.4.2 6. 6.1 6.2 6.3 6.4 6.5 6.6 1 101-1 102 - 1 103 -
11、1 104-1 105 - 1 101 - 2 106 - 1 201 - 1 202-1 ,203 - 1 301 - 1 301-2 302 - 1 501-1 Arrangement and operation of equipment to be tested (as required) . . . . . . . . . . . , Control adjustment . . . . . . . . . . . . Signal inputs . , . . . . , , , . . . . . . . Arrangement and operating conditions .
12、 . . . Mounting and grounding . . . . , . . . . . . Loads . . . . . . . . . . . . . . . . . . . . Measuring equipment . . . . . . . . . . . . . Identification of spurious responses in measuring equipment . . . . , . . . . . . . Calibration of measuring equipment . . . . . Test methods . . . . . , .
13、. , . . . . . . . Final magnetic signature tests(Section 600) . Organization of this standard . . . . . . . . NOTES . . . . . . . . . . . . . . . . . . . . Intended use . , . . . . . . . . . . . . . . Issue of DoDISS . . . . . . . . . . , . . . . Data requirements .,a Index of test methods . . . . .
14、 . . . , . . . Subject term (key word) listing . . . . . . . Changes from previous issue . . . , . . . . . FIGURES Example of magnetic field data summary . . . . Configuration of ring for gimbal fixture . . . Magnetometer position designators (i) . . . . Magnetometer position designators (i) . . . ,
15、 Configuration of magnetometers sensors . . . Configuration of magnetometers sensor array . Configuration of test sample, cart, track, and sensor . . . . . . . . . . . . . . Mounting frame for magnetometers sensors . , Magnetometer position designators (i) . , . . Configuration of mounting frame for
16、 sensors . Configuration of test sample, structure, andsensor . . . . . , . . . . , . . . . . . Configuration of ring for gimbal fixture . . . Magnetometer position designators (i) , . . . Configuration of mounting frame for sensors . Use of low-mu (go-no-go) permeability indicator . , . 9 9 9 9 10
17、12 12 a 101-3 101-4 102 - 5 103 - 3 104 - 5 105 - 3 106 - 3 201-4 202-5 203-2 301-3 301-4 302 - 3 501-2 iv Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-CONTENTS (Continued) Page Figure 502-1 502-2 503 - 1 504- 1 505-1 Table I 102 -I 102 -II 104- I
18、 104- II .lo6 - I 106 -II 106-111 401 -I Appendix Paragraph 10. 10.1 20. 30. 40. 50. 50.1 Circuit diagram for test method 502 , . . . . . Alternative circuit diagram for test method 502 . . . . . . . . . . . . . . . Circuit diagram for test method 503 . . . . , Circuit diagram for test method 504 .
19、. . . . Typical test setup for measurement of relative reversible magnetic permeability . . TABLES Index of test methods . . . . . . . . . . . . Vertical and ambient horizontal magnetic fields for air core volume . . . . . . . . . . . . . Ambient magnetic fields for air core magnetic field condition
20、s . . . , . . . . . . . . . . Ambient magnetic fields for air core volume . Ambient magnetic fields for air core magnetic field conditions . . . . . . . . . . . . . . Ambient magnetic fields for static magnetic field test . . . . . . . . . . , . . Ambient magnetic fields for dynamic magnetic field t
21、est . . . . . . . . . . , . . Ambient magnetic fields for large magnetic field test , . . . . . . . . . . . . Density and temperature coefficient of resistance for electrical conductor materials . . . . . . . . . . . . . APPENDIX A Descriptions of magnetic test facilities . . . GENERAL . . . . . . .
22、 . . . . . . . . . . . . Scope . . . . . . . . . . . . . . . . . . . . APPLICABLE DOCUMENTS . . . . . . . . . . . . . (Not applicable) DEFINITIONS , . . . . . . . . . . . . . . . . (Not app 1 icab le) GENERAL REQUIREMENTS . . . . . . . . . . . . . (Not applicable) DETAILED REQUIREMENTS . . . . . . .
23、 . . . . . David Taylor Research Center (DTRC) . . . . . 502 - 2 502-3 503 - 2 504-2 505-3 10 102 - 3 102-4 104- 3 104-4 106 - 5 106-7 106-8 401-5 13 13 13 13 13 13 13 13 V Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Paragraph Paragraph MIL-STD-Z
24、142A(SH) CONTENTS (Continued) Page MIL-STD-2142A 17 m 97999LL 0073360 O 50.1.1 Test items . 50.1.1.1 Limitations on items under test . 50.1.2 Test Building 50.1.2.1 Magnetometer probes . 50.1.2.2 Test coils . 50.1.3 Instrumentation and Control Building 50.1.4 Other equipment . 50.2 Goddard Space Fli
25、ght Center (GSFC) . 50.2.1 Test items . 50.2.1.1 Limitations on items under test . 50.2.2 Coil system building 50.2.2.1 Magnetometer probes . 50.2.2.2 Test coils . 50.2.3 Operations and instrumentation building . 50.2.3.1 Magnetometers 50.2.4 Magnetometer building 50.2.5 Servo control building . 50.
26、2.6 Other equipment . White Oak (NSWC) 50.3.1 Magnetic Ship Models Facility 50.3.1.1 Test items . 50.3.1.1.1 Limitations on items under test . 50.3.1.2 Coil system . 50.3.1.3 Model range . 50.3.1.4 Magnetizing and demagnetizing system 50.3.1.5 Degaussing current distribution system . 50.3.1.6 Magnet
27、ometers 50.3.2 Magnetic Structures Test Facility 50.3.2.1 Test items . 50.3.2.1.1 Limitations on items under test . 50.3.2.2 Coil systein . 50.3.2.3 Magnetometer 50.3.2.4 Other equipment . 50.3 Naval Surface Warfare Center. APPENDIX B Test Report Technical Content Requirements .1 o. SCOPE 10.1 Scope
28、 20 . APPLICABLE DOCUMENTS 20.1 Government documents 30 . TEST REPORTS . 30.1 Test reports 13 13 14 14 14 14 14 15 15 15 15 15 16 16 16 16 16 13- 16 16 16 16 16 17 17 17 17 17 17 18 18 18 18 19 19 19 19 19 19 vi Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
29、m IHS-,-,-CONTENTS (Continued) Paragraph 30.2 Test method test reports TEST METHODS Section Method 100 FERROUS MAGNETIC FIELD TEST METHODS 101 Ferrous magnetic field from a class 1 source measured at a distance in an ambient magnetic environment . measured at a distance in a controlled magnetic envi
30、ronment . measured on a horizontal plane in an ambient magnetic environment . measured on a horizontal plane in a controlled magnetic environment . measured by ranging in an ambient magnetic environment . measured on a horizontal plane in a controlled magnetic environment . 102 Ferrous magnetic fiel
31、d from a class 1 source 103 Ferrous magnetic field from a class 1 source 104 Ferrous magnetic field from a class 1 source 105 Ferrous magnetic field from a class 1 soyrce 106 Ferrous magnetic field from a diesel engine Section 200 EDDY CURRENT MAGNETIC FIELD TEST METHODS . 201 Eddy current magnetic
32、field from a class 2 source measured at a distance in a controlled magnetic environment . in a controlledmagnetic environment . in an ambient magnetic field 202 Eddy current magnetic field from a class 2 source measured on a horizontal plane Eddy current magnetic field from a class 2 203 source caus
33、ed by oscillatory motion . Section 300 STRAY MAGNETIC FIELD TEST METHODS . 301 Stray magnetic field from a class 3 source measured at a distance in an ambient magnetic environment . 302 Stray magnetic field from a class 3 source measured on a horizontal plane in an ambient magnetic environment . Pag
34、e 22 100-1 101-1 102 - 1 103-1 104- 1 105-1 106 - 1 200-1 201-1 202-1 203 - 1 300 - 1 301-1 302 - 1 vi i Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Section Section Section 400 401 402 500 501 502 503 504 505 600 601 602 603 604 605 CONTENTS (Con
35、tinued) Page ELECTRICAL CONDUCTIVITY TEST METHODS . . . . Percent IACS electrical conductivity by electrical resistivity measurement . . . . . Percent IACS electrical conductivity by eddy current measurement . . . . . . . . . . MAGNETIC PERMEABILITY-TEST METHODS , , . . , Relative magnetic permeabil
36、ity with go-no-go permeability indicator . . . . . . Relative magnetic permeability using a modified Fahy low-mu permeameter . . . . . Relative magnetic permeability using a Fahy low-mu permeameter . . . . . . . . . Relative magnetic permeability by null method Relative reversible magnetic permeabil
37、ity . , FINAL MAGNETIC SIGNATURE TESTS . . . . . . Initial magnetic calibration , . , . . . . , Ship service (added service) stray magnetic fieldtest . . . . . . . , . . . . . . . . . Minesweep generator stray magnetic field test Static electromagnetic roll test . . . . . . Dynamic electromagnetic r
38、oll test , . . . . . *. viii 400 - 1 401-1 402 - 1 500-1 501 - 1 502 - 1 503-1 504-1 505-1 600- 1 601-1 602 - 1 603-1 604- 1 605-1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1. SCOPE 1.1 ScoDe. This standard establishes requirements for methods
39、of measuring and determining the magnetic characteristics (permeability; electrical conductivity; ferrous, stray and eddy current magnetic field strengths) of materials and equipment. 1.1.1 Amlication. The requirements of this standard should be applied for the acquisition of materials and equipment
40、 to be used on nonmagnetic mine warfare ships and craft, as specified in the individual material and equipment specifications or in the contract. 1.2 Classification. Classification is applicable to the type of magnetic fieid source and the test method for tests established by this standard. 1.2.1 Fi
41、eld sources. Magnetic field sources shall be classified as follows : Class 1. Ferrous magnetic field. Class 2. Eddy current magnetic field. Class 3. Stray magnetic field. 1.2.2 Test methods. Test methods are grouped in sections and designated by a series of numbers in accordance with the following s
42、ystem: (a) (b) (c) (d) (e) (f) Section 100 - Ferrous magnetic field tests are designated by Section 200 - Eddy current magnetic field tests are designated Section 300 - Stray magnetic field tests are designated by Section 400 - Electrical conductivity tests are designated by Section 500 - Permeabili
43、ty tests are designated by I5XX“. Section 600 - Final magnetic signature tests are designated by It 1xx“ , by II 2XX“ . If3XX“ . “4“ II6XX“ . Where TX“ indicates the numerical order of tests from O1 to 99. 1.3 .Method of reference. When a specific test method is required for measuring a magnetic cha
44、racteristic of amaterial or equipment, the test methods contained herein should be referenced in the applicable document by specifying this standard and the test number. 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-ZLYZA 17 m 77797LL 007
45、3384 8 m 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1. 1 Specification and standards. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Depart
46、ment of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS MI LI TARY MIL-1-17214 - Indicator, Permeability; Low-mu (Go-No-Go). STANDARDS MILITARY DOD-STD-2141 - Definitions and Systems of Units, Magnetic Silencing (Metr
47、ic). DOD-STD-2143 - Magnetic Silencing Requirements for the Construction of Nonmagnetic Ships and Craft (Metric). MIL-STD-45662 - Calibration Systems Requirements. (Unless otherwise indicated, copies of federal and military specifications and standards are available from the Standardization Document
48、 Order Desk, . Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.1.2 Other Government mblication. The following other Government Unless publication forms a part of this document to the extent specified herein. otherwise specified, the issues are .those cited in the solicitation, UNITE
49、D STATES DEPARTMENT OF COMMERCE NATIObXT, INSTITUTE OF STANDARDS AND TECHNOLOGY (NIST) Handbook 100 - Copper Wire Tables. (Application for copies should be addressed to the National Institute Standards and Technology, Information Resources and Services Division, Gathersburg, MD 20899.) 2.2 Non-Government publications. The following documents form a part of this document to the extent specified h
