1、MIL-T-81308 (MP) 23 August 1965 IILITARY SPECIFICATION TEST SET GROUP, hlAGNETIC DETECTOR HEAD, OA-7366/AShI-3, OA-7366A/AShI-3, AND OA-7366B/ASM-3 This specification has been approved by the Bureau of Naval Weapons, Department of the Navy 1. SCOPE 1.1 Scope - The test equipment covered by this spec
2、ification shall be for shop use and shallprovide a simulated earths magnetic field, shielded from the actual earths magnetic field and all other fixed and/or variable magnetic fields, to the degree specified herein, for calibration of the Detecting Set, Magnetic, AN/ ASQ-8 and AN/ASQ-10. shall be sa
3、tisfactory for use with the Test Set, Detecting Set, AN/AShl-3, and Test Set, Pagnetic Detector, AN/AShl-6(*). The various units which compose the Test Set Group, Magnetic Detector Head, are listed in paragraphs 1.2.1, 1.2.2, and 1.2.3 below: 1.2 Classification - The Test Set Group, Magnetic Detecto
4、r Head, 1.2.1 Units - Test Set Group, hlagnetic Detector Head, OA-7366/ASh-3, is composed of the fomng: I t ems Shield, Test Applicable TYP? Designation Paragraph MX-6797/ASM-3 3.4.1 Dolly, Test Equipment V-341/ASM-3 3.4.3 Simulator, hlagne t ic ShI-417/ASI-3 3.4.5 Control, Simulator C-6553/AShI-3 3
5、.4.6 Cable Assembly, Special W-1 of OA-7366/AShI-3 3.4.7 Purpose, Electrical 1.2.2 Units - Test Set Group, Magnetic Detector Head, OA-7366A/ASM-3, is composed of the following: Items Shield, Test Type . Applicable Designation Paragraph MX-6797/AShl-3 3.4.1 Dolly, Test Equipment V-341A/AShl-3 3.4.4 S
6、imulator, Magnetic SM-41 7/AShf -3 3.4.5 Control, Simulator C-6553/AShl-3 3.4.6 Cable Assembly, Special W-1 of OA-7366/ASM-3 3.4.7 Purpose, Electrical FSC-6625 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-O(JP) 1.2.3 Units - Test Set Group,
7、Magnetic Detector Head, OA-7366B/AShI-3, is composed of the following: Type Applicable Items Designation Paragraph Shield, Test hfX-6797A/ASIII-3 3.4.2 Dolly, Test Equipment V-341A/ASM-3 3.4.4 Simulator, Magnetic SM-417/AShI-3 3.4.5 Control, Simulator C-6553/ASM-3 3.4.6 Cable Assembly, Special W-1 o
8、f OA-7366/ASM-3 3.4.7 Purpose, Electrical 2. APPLICABLE DOCUIENTS 2.1 General - The following documents of the issue in effect on the date of invitation for bids form a part of this specification to the extent specified herein: SPECIFICATIONS hfi 1 it a rv MIL-B-18 MIL-T-5422 MIL-I -6181 MIL-E-17555
9、 MIL-T-18303 MIL-N-18307 MIL-T-21200 Batteries, Dry Testing, Environmental, Aircraft Electronic Equipment Interference Control Requirements, Aircraft Equipment Electronic and Electrical Equipment and Associated Repair Parts, Preparation for Delivery of Test Procedures; Preproduction and Acceptance f
10、or Aircraft Electronic Equipment, Format for Nomenclature and Nameplates for Aeronautical Electronic and Associated Equipment Test Equipment for Use with Electronic and Fire Control Systems, General Specification for DRAWINGS BUWEPS E-1801 Test for Presence of Magnetic Material 2 2 Availability of D
11、ocuments - (1) When requesting specifications, standards, drawings, and publications, refer to both title and number, Copies of this specification and applicable specifications required by contractors in connection with specific procurement functions may be obtained upon application to the Commandin
12、g Officer, Naval Supply Depot, Code DCS, 5801 Tabor Avenue, Philadelphia 20, Pennsylvania. Drawings may be obtained from the Chief, Bureau of Naval Weapons. 3. REQUIREMENTS 3.1 Parts and Materials - In the selection of parts and materials, fulfillment of major design objectives shall be the prime co
13、nsideration. In so doing, the following shall govern: I (1) Parts and materials requirements shall conform to specif,i- cation MIL-T-21200. _- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-81308 (WP) (2) Non-repairable subassemblies, as outli
14、ned in specification MIL-T-21200, shall be used when practicable. The general. size of the subassembly, and the amount of circuitry to be included therein shall be approved by the procuring activ- ity, A mean-time-to-failure of more than 5000 hours should be the goal of each. (3) When previously pro
15、duced models of this equipment did not use non-repairable subassemblies the design shall not be changed to employ non-repairable assemblies without the approval of the procuring activity. 3.1.1 Nonstandard Parts and Material Approval - Approval for the use of nonstandard parts and materials shall be
16、 obtained as outlined in Specification MIL-T-21200. 3.2 Design and Construction - The equipment shall conform with all .the applicable requirements of Specification MIL-T-21200 for design, construction, and workmanship, .except as otherwise specified herein. 3.2.1 Total Weight - The total weight of
17、the equipment, including cables and batteries, shall be a minimum consistent with good design and shall not exceed 350 pounds. 3.2.2 Reliability - 3.2.2.1 Operational Stability - The equipment shall operate in a satis- factory manner for a period of at least 1000 hours without the necessity for read
18、just- ment of any controls which are inaccessible to the operator during normal use, except that replacement of batteries at intervals of not less than 50 hours of operation will be permitted. 3.2.2.2 Operating Life - The equipment shall have a minimum total operating life of 10,000 hours with reaso
19、nable servicing and replacement.of parts. Parts requiring scheduled replacement due to deterioration during the life of the equipment, and the rate of deterioration of such parts, shall be determined by the contractor and submitted to the procuring agency. 3.2.3 Cables and Connectors - The equipment
20、 shall provide for the use of cables and connectors in accordance with Specification MIL-T-21200. 3.2.4 Interchangeability - The equipment shall meet the interchange- 3.2.5 Interference Control - The generation of radio frequency inter- ability requirements asdefinedinication hIIL-T-21200. ference a
21、nd the susceptibility of the equipment to radio and audio interference shall be controlled within the limits of Specifidation MIL-1-6181. 3.2.6 hlaintenance Provisions - Provisions for maintenance shall be as specified in Specification IIL-T-21200. 3.2.7 Nomenclature and Nameplates .- Nomenclature a
22、ssignment and name- plate approval for equipment identification shall be in accordance with Specification NIL-N-18307. 3.2.8 Standard Conditions - The following conditions shall be used to establish normal performance characteristics for standard operation of the equipment: Temperature Room ambient
23、(25O 2 15OC) Vibration None Humidity Room ambient up to 90% relative humidity Input power voltage 12.5 V DC maximum (low noise battery . Altitude Normal Ground source) - I. . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-81308 (IP) 3.2.9 Serv
24、ice Conditions - The test equipment shall operate satisfac- torily under any of the environmental service conditions or reasonable combination of these conditions as specified in hiIL-T-21200 for Class 3 equipment except as modified herein. 3.2.9.1 Temperature - Without any warm-up period, the equip
25、ment shall operate satisfactorily under any possible combination of the ambient conditions speci- fied in Specification MIL-T-21200. jected to impact as spemd in Specification MIL-T-21200 except that the Shield, Test, shall not be subjected to any shock. sequently fail to provide specified performan
26、ce when subjected to continuous vibration along each of the three mutually perpendicular axes within the frequency range and amplitude as follows, except that the Shield, Test, shall be tested while supported, properly seated on the Dolly, Test Equipment, during the test. 3.2.9.2 Shock - The equipme
27、nt shall withstand a shock of 5g when sub- 3.2.9.3 Vibration - The test equipment shall not suffer damage or sub- Frequency Range 5 to 15 cps 16 to 25 cps Double Amplitude 0.060 +. 0.006 0.040 2 0.004 3.2.10 Warm-up Time - No warm-up time shall be required for the oper- ation of the test equipment d
28、escribed herein. Warm-up time of the Magnetic Anomaly Detection equipment under test shall be determined by the particular Magnetic Anomaly Detection equipment. - 3.2.11 Primary Input Power Requirements - The test equipment shall be capable of satisfactory operation when supplied input power having
29、characteristics as defined in Specification MIL-T-21200. The power required shall be of the following type and shall not exceed the specified amount, Batteries shall conform to the re- quirements of Specification MIL-B-18. (1) DC Power, battery source, 12.5 V DC maximum, 0,010 A. 3.3 Performance - T
30、he performance of the equipment shall be as set forth below, Unless otherwise specified, these requirements shall apply under both standard and extreme service conditions, When reduced performance requirements for service conditions are acceptable, acceptable variations from the performance under th
31、e standard conditions will be specified. junction with the AN/ASM-3 or AN/ASM -6 Test Sets, shall be used for maintenance, re- pair, and adjustment of the AN/ASQ-8 and AN/ASQ-10 Detecting Sets. for mounting and magnetically shielding the Detecting Head, DT-37(*)/ASQ-8 or DT-239/ ASQ-1OA. It shall al
32、so provide a uniform, noise free, controllable, simulated earths field in the area of the detecting magnetometer of the Detecting Head under test and provide for interconnecting the Detecting Head under test with Cable Assembly, CX-2512/U (W1019-1), of Detecting Set Test Set, AN/ASM-3, or W-7 of lag
33、netic Detector Test Set, AN/ASh-6, as applicable. 3.3.3 Simulated Earths Field Characteristics - The simulated earths field within the Shield, Test, Mx-6i9i (*)/A SM-3, of the Test Set Group shall be noise free and uniform in the area of the detecting magnetometer of the Detecting Head under test. T
34、he intensity of the simulated earths field at the detecting magnetometer shall be variable in both directions within the range of 20,000 to 75,000 gamma. 3.3.1 Functional Performance - The Test Set Group, when used in con- 3.3.2 Prime Equipment Serviced - The Test Set Group shall provide 3.4 Detail
35、Requirements - 3.4.1 Shield, Test, MX-6797/ASM-3 - This unit shall meet the follow- ing requirements: 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-81308(WP) 3.4.1.1 Function - The Shield, Test, shall completely enclose the Magnetic Detecto
36、r Head, DT-37(*)/ASQ-8, or DT-239/ASQ-lOA, when mounted in the lower portion of the inner mounting cradle of Detecting Head Test Stand, hf“-1321/AShI-3, and the Magnetic Simulator, SU-417/AShI-3, and shield them from the effects of the Earths magnetic field and all other fixed and variable magnetic
37、fields to the degree speci- fied herein. It normally rests on the Dolly, Test Equipment, V-341(*)/ASM-3, at all times, when in use, storage, or being transported. 3.4.1.2 Form Factor - The Shield, Test, shall not exceed 24 5/8 inches in diameter by 54 inches high. This does not include the electrica
38、l connectors and connector mounting box, which shall not extend more than 4 inches beyond the lower periphery of the Shield, Test. 3.4.1.3 Weight - The weight of the Shield, Test, shall not exceed 260 pounds. 3.4.1.4 Contents of Unit - The Shield, Test, shall contain the follow- ing assemblies, suba
39、ssemblies, and circuits: (1) Barrel Assemblies - Four barrel assemblies, secured one within the other, manufactured from a nickel iron alloy having high magnetic permeability at low inductions, shall form a part of the Shield, Test. The innermost barrel assembly shall be sufficiently large to accept
40、 the complete Detector Head, DT-37(*)/ASQ-8, or DT-239/ASQ-lOA, and the Simulator, Magnetic, SI-417/ASN-3, when mounted in the.lower portion of the inner mounting cradle of Detecting Head Test Stand, MT-1321/ASM-3. Each barrel assembly shall be uniformly spaced approximately one inch in all directio
41、ns from the adjacent barrel assembly. Each barrel assembly shall be electrically and magneti- cally insulated from all other barrel assemblies. All assembly hardware shall be of non-magnetic material. (2) Lid Assemblies - Four dome shaped lid assemblies, each to fit one barrel assembly and manufactu
42、red from the same material as the barrel assemblies, shall form a part of the Shield, Test. Each lid assembly, when installed, shall be uniformly spaced approximately one inch from each adjacent lid assembly and shall overlap the associ- ated barrel assembly a minimum of 1 1/4 inches. Cushion- ing s
43、hall be provided to protect the lid assemblies from mechanical shock when removed from the Shield, Test, and nested in an inverted position. (3) Circuits - Circuits shall be provided for the following functions: (a) Extension of Operating Circuits of the Detector (b) Extension of Operating Circuits
44、of the Simulator, Head, DT-37 (*)/ASQ-8, or DT-239/ASQ-lOA. Magnetic. 3.4.1.5 Electrical Connections - Connections to external circuits shall be provided as follows: Reference Designation Connector Type Function 2 J1 2 52 *2P1 MS3 MS3 MS3 02R14S-2P Magnetic Simulator Power from Simulator Control 02R
45、24-28P Detector Head Control from Amplifier Test Set, TS-798/ASM-3, or Magnetic , Detector Test Set, TS-1193/ASM-6 Simulator 06R14S-2S Magnetic Simulator Power to Magnetic 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-T-L308 66 E 9979906 0143
46、056 1 W MIL-T-81308(W) Reference Designation Connector Type *2P2 MS3106R24-28S *Modified to remove magnetic materials 251. Pin Purpose - A B C D 2 52 Pin A B C D - E F G H Y K L 111 N P Q R S T U V W X Y Z Spare Lead Simulator Power Simulator Power Shield for A, B and C Leads Purpose Detector Drive
47、Detector Drive Detector Drive Shield for Detector Drive Leads A, B and C Ground Shield Open Open Inner Drive Inner Drive Inner Drive Outer Drive Outer Drive Outer Drive Ground Shield Inner Variable Shield Outer Variable Motor Third Variable Motor Shield Third Variable hotor Constant Field Constant F
48、ield Third Input Signal Third Input Signal Motor Function Detector Head Control to Detector Head, DT-37 (*)/ASQ-8, or DT-239/ASQ-lOA 2P1 Pin A B C D - 2P2 Pin A B C D - .E F G H J K L hl N P Q R S T U V W X Y Z I Wiring shall be in accordance with MCAS Cherry Point Drawing No, Cl-1323. 3.4.1.6 Shiel
49、ding Properties - The magnetic attenuation provided by the Shield, Test, shall be the maximum for the material used, to a sinusoidal magnetic field of 1,600 The attenuation shall be not less than 65 db when subjected I frequency of 2 cycles per second or less, where: db = 20 log (attenuation ratio), I I 3.4.2 Shield, Test, IIM-6797A/ASM-3 - This unit shall meet the re- auirements for Shield, Test, MX-6797/AShI-3, except as follows: 6 Provided by IHSNot for Resal
