1、MIL-M-24b14A m 999990b 1845544 694 m Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, SEA OSQ42, Commander Naval Sea Systems Command, 2531 National Center Bldg 3, Washington, DC 203625
2、160 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. I AMSC NIA FSC 6625 MIL-M-246 14A(SH) 12 February 1993 SUPERSEDING 21 January 1983 DOD-M-24634(SH) MILITARY SPECIFICATION METERING SYSTEM, STORAGE BATERY C
3、URRENT AND AMPERE-HOUR, DIGITAL (MJ3“RIC, NONMERCURY TYPE) This specification 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. 1. SCOPE 1.1 Scope. This specification covers a digital c
4、urrent and ampere-hour meter (AHM) system for a submarine or surface ship storage battery circuit. 1.2 Classification. Metering systems shall be of the following classes and types as specified (see 6.2). 1.2.1 Class. Classes shall be determined by the application and shall be as follows: Class I - S
5、ubmarine application, TRIDENT, SSN 688 and SSN 637 - with ampere display suppressed Class II - Surface ship application - with ampere display operating Class III- Submarine application (SEAWOLF) - With ampere display operating and combined ampere-hour display and totalizing ampere-hour displays for
6、integration into the Electric Plant Control Panel (EPCP), no enclosure Licensed by Information Handling ServicesMIL-M-24614A SSSSSOb 3845545 520 W 1.2.2 Type. Type shall be determined by the shunt rating values. Types shall be as follows: Type O Type I Type II Type III Type IV Type V Type VI - 2,000
7、 amp/100 mV shunt/50 pohm - 2,500 amp/100 mV shunt/40 pohm - 3,000 arnp/100 mV shunt/33.33 pohm - 4,000 arnp/100 mV shuntD5 pohm - 5,000 amp/100 mV shuntD0 pohm - 8,000 amp/100 mV shunt/l25 pohm - 10,000 amp/100 mV shunt/lO pohm 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications
8、and standards. The following specifications and standards form a part of this specification to the extent specified herein (see 6.2). Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODIS
9、S) and supplement thereto, cited in the solicitation. SPECIFICATIONS FEDERAL PPP-F-320 MILITARY MILS901 MILC-915 MIL-E-91 7 MILE-2036 MIL-P-15024 MIL-P-15024/5 MIL-E-17555 Fiberboard, Corrugated and Solid, Sheet Stock (Container Grade) and Cut Shapes Shock Tests, HI (High-Impact), Shipboard Machiner
10、y, Equipment and Systems, Requirements for Cable and Cord, Electrical, For Shipboard Use, General Specification for Electric Power Equipment, Basic Requirements for (Naval Shipboard Use) Enclosures for Electric and Electronic Equipment Plates, Tags and Bands for Identification of Equipment Plates, I
11、den ti fica tion Electronic and Electrical Equipment, Accessories, and Provisioned Items (Repair Parts); Packaging of 2 Licensed by Information Handling Services. * a 0 a MIL-M-24bL4A m 0b b84554b 467 m MIL-L-19140 MIL-S-1 9622 MIL-C-2 1097 MIL-E-24142 MIL-E-2414216 MIL-C-24643 MIL-C-24643/33 MIL-T-
12、55164 STANDARDS MILITARY MIL-STD-167-1 MIL-STD-202 MIL-STD-454 MIL-STD-470 MIL-STD-781 MIL-STD-1364 MIGSTD-1399, Section 300 MIL-STD-2036 MIL-M-24614A( SH) Lumber and Plywood, Fire Retardant Treated Stuffing Tubes, Nylon; and Packing Assemblies; General Specification or Connectors, Electrical, Print
13、ed Wiring Board, General Purpose, General Specification for Enclosures or Electrical Fittings and Fixtures, General Specification or Enclosure, Submersible, (15 foot) Size 8 by 10 through 14 by 26 Cable and Cord, Electrical, Low Smoke, for Shipboard use, General Specification for Cable, Electrical,
14、Type LS2SWU including Variation LS2SWUA) Terminal Lugs Solder Type, Styles TBLD and TEES . Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited) Test Methods or Electronic and Electrical Component Parts Standard General Requirements for Electronic Equ
15、ipment Maintainability Program Requirements (For Systems and Equipments) Reliability Testing for Engineering Development, Qualification and Production Standard General Purpose Electronic Test Equipment Interface Standard for Shipboard Systems, Electric Power, Alternating Current (Metric) General Req
16、uirements for Electronic Equipment Specifications (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 191 11-5094.) 3 Licensed by Informatio
17、n Handling ServicesNIL-N-24bL4A 9999906 1845547 3T3 MIL-M-246 14A( SH) 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issue
18、s are those cited in the solicitation. PUBLICATION NAVAL SEA SYSTEMS COMMAND (NAVSEA) 0967-LP-00-312-8010 Maintainability Design Criteria Handbook for Designers (Application for copies should be addressed to the Naval Publications and Forms Center, (A. NPODS), 5801 Tabor Avenue, Philadelphia, PA 191
19、20-5099.) 2.2 Non-Government publications. The following document forms a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specif
20、ied, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE, INC. (ANSI) 200-75 Electrical and Electronic Parts and Equipments IEEE Standard Reference Des.gnation for (DOD adopted) (Application for c
21、opies should be addressed to the American National Standards Institute, Inc., 1430 Broadway, New York, NY 10018.) (Non-government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents may also be available in or throu
22、gh libraries or other informational services.) 23 Oder 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 precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a speci
23、fic exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.6) in accordance with 4.3. 3.2 Materials. Materials used in the construction of the metering systems shall be as specified herein. 4 Licensed b
24、y Information Handling ServicesMIL-M-ZVbLVA m Ob 1845548 23T m MIL-M-24614A( SH) 3.2.1 Prohibited materials. 3.2.1.1 Mercury. The use of the element mercury in any component of the metering systems and for any manufacturing process is prohibited. 3.2.1.2 Thermionic devices. The use of thermionic dev
25、ices such as electron tubes is prohibited. 3.2.2 Recovered materials. Unless otherwise specified herein, all equipment, material, and articles incorporated in the products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maximu
26、m extent practicable without jeopardizing the intended use. The term “recovered materials“ means materials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean t
27、hat the use of used or rebuilt products is allowed under this specification unless otherwise specifically specified. 3.3 System assemblies. The current measuring and display subsystems shall consist of the following functional module assemblies: a. Ammeter function. The ammeter shall be a digital mo
28、dule of the specified class (see 1.2.1) and type (see 1.2.2). This functional module shall sense the voltage across the appropriate shunt and convert this signal into digital information. This information will be used to provide a direct reading display of current when required (see 1.2.1) and for t
29、he purpose of integration by the AHMS described in 3.3(b). The display shall consist of a minus sign (indicating discharge), no sign (indicating charge), and five decimal digits. A display of “OL shall indicate an overload condition. Currents as large as 2 9,999.8 amperes with a minimum resolution o
30、f one ampere for currents equal to or greater than 1, amperes and a minimum resolution of 0.1 ampere for currents less than 1, amperes shall be capable of being displayed. The leading zeros in the first three digits shall be suppresscd. Class I meters shall provide only overload and charge/discharge
31、 indication. b. Ampere-hour meters function. Two, digital AHM displays shall be provided. One of these shall digitally display the integral of the positive-polarity output and the other shall display the integral of the negative-polarity output of the ammeter function. Except for the front- panel le
32、gends, “charge“ or “discharge“, the two AHMS shall be identical and interchangeable. A momentary pushbutton switch shall be provided for each display on the front panel of the system which will permit the operator to clear the accumulated value to zero. The display shall be a seven-digit decimal wit
33、h the decimal point to the left of the least significant digit. The display shall suppress leading zeros, in the first five digits and shall provide indication of overflow beyond 999,999.9 AMP HRs. The ampere hour module shall be capable of retaining the accumulated AMP HR reading for a period of at
34、 least one week in the event of a power line failure. There shall be no loss of stored data upon power interruption or restoration. 5 Licensed by Information Handling ServicesMIL-M-24bL4A 9990b L845549 L7b C. d. MIL-M-24614A( SH) Totalizing ampere-hour meter function. Two digital totalizing AMP HR d
35、isplays shall be provided. One shall display charge AMP HRs and the other discharge AMP HRs. The totalizing display be in the form of seven decimal digits to a maximum value of 9,999,999 AMP HRs. Totalizing displays shall be normally suppressed and a pushbutton switch shall be provided to permit the
36、 operator to enable the displays momentarily when desired. Except for the front-panel legends, “charge“ or “discharge“, the two totalizing displays shall be identical and interchangeable. Leading zeros, except for integer AMP HRs shall be suppressed in the display, and an indication of overflow beyo
37、nd 9,999,999 AMP HRs shall be provided. Each totalizing display shall be capable of being manually cleared to zero after the front face of the indicator is removed. Class III displays. There shall be two dual purpose ampere-hour displays: one for charge ampere-hours and one for discharge ampere-hour
38、s. There shall be one operating ammeter display. The ampere-hour meter function and the totalizing ampere-hour meter function shall be combined in a single case with separate push buttons for displaying total ampere-hours and resetting the ampere-hour meter. 3.4 Interconnections. Unless otherwise sp
39、ecified (see 6.2), cables shall not be furnished. When cables are furnished, the connections between the current shunt, the metering system, and the totalizing displays shall be made by shielded cables having a maximum resistance of 2.3 ohms per conductor per 100 meters at 25 degrees Celsius (“C) (t
40、ype LS2SWU of MIL-C-24643 and MIL-C- 24643/33). Maximum cable lengths will be 100 meters between the current shunt and the meter system. 3.4.1 Signai cable stuffing tube. For Classes I and II the signal cable stuffing tube shall conform to Military part number M1%22/1-001 in accordance with MIL-S-19
41、622 and MIL-S-1%22/1. 3.4.2 Power cable stuffing tube. For Classes I and II the power cable stuffing tube shall conform to Military part number M1%22/1-002 in accordance with MIL-S-19622 and MIL-S-l%22/1. 3.43 Stuffing tubes. Stuffing tubes shall conform to MIL-S-19622. 3.5 Construction of assemblie
42、s. , 3.5.1 General. The construction shall include, to the greatest extent possible, features that facilitate maintenance. Ail displays (or display modules) shall be removable for ease of repair or replacement. Printed wiring boards within the instruments shall be in accordance with requirement 17 o
43、f MIL-STD-454. The display digits shall be of the luminous type (either plasma discharge or light emitting diode (LED), orange in color, at least 1 centimeter (cm) in height, and easily readable in normal room illumination (750 Lux) at the face of the display over an angular range of at least plus o
44、r minus 45 degrees. The display shall remain readable at a distance of 2 meters minimum. Socketed components shall be secure against becoming dislodged by shock or vibration. Circuit board contact fingers used for interconnection with edgeboard connectors shall be gold plated. The front panel of the
45、 ammeter shall be as specified on figure 1. The ammeter displays shall be labeled: “AMPERES“, the AHM displays shall be labeled “DISCHARGE AMP-HOURS OR CHARGE AMP-HOURS 6 Licensed by Information Handling ServicesMIL-fl-24614A 999990b 1845550 998 = as appropriate, and the totalizing AMH displays shal
46、l be labeled “TOTAL DISCHARGE AMP-HRS“ or “TOTAL CHARGE AMP-HOURS, as appropriate. The pushbutton on the front panel shall be in accordance with figure 1 and be labeled: “RESET.“ 3.5.2 Terminal boards. Terminal boards shall be in accordance with MIL-T-55164. 3.53 Identification plates. The current m
47、easuring system shall be equipped with an identification plate in accordance with MIL-P-15024. The identification plates shall conform to the marking requirements of MIL-P-15024/5. 3.5.4 Enclosure. For Classes I and II the metering system shall be mounted in a Military part number M24142/6-001, size
48、 8 by 10, enclosure conforming to MIL-E-24132/6 and MIL-E-24132 with a type “B“ (flat) cover. The enclosure shall be painted in accordance with MIL-E-917, except that only one coat of gray enamel shall be applied. The outline and mounting dimensions shall be as specified on figure 2. Touching up sha
49、ll be permitted for marks or scratches due to assembly, testing or other factory handling. The metering system shall conform to MIL-E-2036. Class II1 metering systems shall have individual cases and panel covers for the three displays, see Figure 3. 3.5.5 Electronic parts. Electronic parts utilized in the metering system shall conform to MIL-STD-2036. Approval of nonstandard parts shall be required prior to submission of first article sample for testing or if first article tests are waived, prior to production of metering systems under the contract. 3.5.6 Edgeboard c
