1、MIL-M-24359 66 999970b q22637 3 -+ MIL-M-24359 (SHIPS) 5 February 1969. MILITARY SPECIFICATION METERS, MILLIAMETERS , DIRECT CURRENT PANEL MOUNTING (EDGEWISE TYPES) 1. SCOPE 1.1 Scope. This specification covers panel mounted, electrical-indicating, milli- 1.2 Classification. 1.2.1 Tx designation. am
2、pere, direct-current ammeters of the edgewise type. The type designation of ammeters shall be in the following form, and as specLfied (see 6.1) : .T T i Component Style Size Color scheme Full-scale (1.2.1.1) (1.2.1.2) (1.2.1.3) (1.2.1.4) value (1.2.1.5) T 7- T I 1 I Kind of current Electrical Units
3、Special Features (1.2,1.61 (1.2.1.7) (1.2.1.8) 1.2.1.1 Com onent Ammeters covered by this specification are designated by the two-letter aymbaTElci.iRrr* 1.2.1.2 Style. The style is designated by a one-letter symbol as follows: Y - vertical scale H - horizontal scale 1.2.1.3 Size. The size is design
4、ated by a one-number symbol representing the con- ventional identification and approximately equal to the case size in inches as follows: 5 - 5-inch case length 8 - 8-inch case length 1.2.1.4 Color scheme. The scale color scheme is designated by a one-letter symbol as follows: W - white scale backgr
5、ound, black markings B - black scale background, white translucent markings 1.2.1.5 Full-scale value. 1.2.1.5.1 Sin le-range meters. The full-scale value of single-range meters with zero at left for horizontal scale meters or at tlie bottom for vertical scale meters is re- presented by three figures
6、 designating the maximum number o units indicated; when the full- scale value is less than three figures, zeros are inserted at the left to fill out to three figurec. Where the letter R“ is used in this group, between two figures, it represents a decllmal pint. Example: 1R5 represents 1.5. 12.1.5.2
7、Offset zero. The full-scale value of zero-center or offset zero meters is indScated by -numb= designating the numerical value of the end-scale points, with a letter between them designating the decimal value of the numbers, as follows: D - tenths Example: 5D5 represents 0.5-0-0.5. U - units Example:
8、 lu9 represents 1-0-9, T - tens Example: 2T2 represents 20-0-20. H - hundreds Example: 5H5 represents 500-0-500. FSC 6625 Obtained From GLOBAL ENGINEERING DOCUMENTS 2625 %.Hickory St. Santa Ana, CA 92707 . (714)640-9870: (213)624-1216: (800)854-7179 Provided by IHSNot for ResaleNo reproduction or ne
9、tworking permitted without license from IHS-,-,-_I MIL-M-24357 66 7777706 0422638 5 MIL-M-2 4 3 59 (SHIPS) 1.2.1.6 Kind current. The kind of cilirant for which the ammeters are designed is designated bywo letters as follows: DC - Direct current 1.2.1.6.1 Standard ranges. Anuneters shall be furnished
10、 in the following full-scale ranges : Direct current ammeters Mil li amperes 1 10 100 2 20 200 5 50 500 1.2.1.7 Electrical- units. by the ammeters are MA-Milliamperes. Two letters that designate the electrical units indicated 1.2.1.8 Special features. A two letter symbol designates special features
11、as follows. An ammeter may have no special feature or one or two special features. 1st letter 2nd letter O - no illumination L - Internal illumination O - no special marking S - special scale marking, for example a non-electrical quantity such as gallons per minute or pounds per square inch. Example
12、s as specified (see .1) 2, APPLICABLE DOCUMEIJTS 2.1 The following documents of the issue in effect on date of invitation for bids or requestsfor proposal, form a part of tne specification to the extent specified herein. SPECIFICATION . - - . - . . - MILITARY MIL-S-901 - Shock Tests , II. I. (iiigh-
13、Impact) Shipboard Machinery Equipment MIL-E-917 - Electric Power Equipment Basic Requirements for (Naval Shipboard) . and Systems. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-L MIL-M-24357 bb = 797770b 0422637 7 = MIL-M-24359 (SHIPS) STANPARDS
14、MIIiITARY MIL-STD-108 - Definitions of and Basic Requirements for Enclosures for Elec- tric and Electronic Equipment. MIL-STD-167 - Mechanical Vibrations of Shipboard Equipment. MS 25237 - Lamp, Incandescent, Single Contact Midget Flanged Base (T-1-3/4 Bulb). I (Copies of specifications, standards,
15、drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) the extent-dhed herein. invitation for bids or request for proposal shall apply. Uniform Freight Classificatio
16、n Rules. 2.2 Other ublications. The following documents form a part of this specification to Unless otherwise indicated, the issue in effect on date of UNIFORM CLASSIFICATION COMMITTEE (Application for copies should be addressed to the Uniform Classification Committee, 202 Union Station, 516 West Ja
17、ckson Boulevard, Chicago, Illinois 60606.) USAS C39.1-1964 - Electrical Indicating Instruments. UNITED STATES OF AMERICAN STANDARDS INSTITUTE (Application for copies should be addressed to the United States of America Standards Institute, 10 East 40th Street, New York, New York 10016.) NATIONAL BURE
18、AU OF STANDARDS Handbook H28 - Screw-Thread Standards for Federal Services. (Application for copies should be addressed to the Superintendent of Documents, Govern- ment Printing Office, Washington, D.C. 20402.) 3. REQUIREMENTS 3.1 Sample for First Article ins ection. Prior to beginning production, s
19、amples shall 3.2 Definitions. be tested as specmed in 4- e definitions used in United States of America Standards Institute (USAS) C39.1-1964 and here- in. 3.2.1 Friction effect. The friction effect shall be determined as follows: Untapped ascending and descendvadings shall be taken at five points d
20、istributed over the scale, using the sane scale points for ascending and descending readings. The difference between corresponding ascending and descending reading6 as observed on the standard meter shall be determined. 3.3 Material. Material requirements of MIL-E-917 shall apply. Thermoplastic mate
21、rials nay be used for minor parts associated with internal illumination features where used, Total temperature of thermoplastic materials so used shall not exceed 85C at 65OC ambient with meter and internal illumination circuit energized. panel shal- a lighk gray finish having a Munsell rating of 2.
22、5GY6.0/0.5: or Other bright trimmings shall be used. corrosion prior to the application of the final gray finish. shall conform to. MIL-E-917. Definitions of terms used in this specification shall be those 3.4 Finish. The portion of the ammeter case exposed to.view from the front of the No nickel Me
23、tal cases shall be rendered resistant to Pretreatment and painting 3.5 Design and construction. 3.5.1 Balancin of movinp element. The moving element of the ammeters shall be balanced by suitablemms such as threaded locknuts or splitnuts, or a wire helix moving along a crossarm and counterweight arm.
24、 The use of solder, or an adhesive such as shellac, to hold the balance weights or to function as a part of the balance weight, shall not be wed except where the ammeters has a separate non-soldered adjustable balance weight. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted wit
25、hout license from IHS-,-,-_ MIL-M-Zq357 bb m 77777Ob 0422b40 3 m e P MIL-l.1-24359 (SHIPS) a 3.5.2 Ma nets. If laminated or multiple-piece magnets are used, the laminations or the parts shdhsecurely fastened together so that they will not separate or loosen as a result of tests specified herein. met
26、al, or otheraterial as specified herein. with close-fitting joints to minimize the entrance of dust and moisture. 3.5.4 Window. Ammeters shall be provided with a window of a methy methacrylate. The windows shallree from detrimental defects that would prevent the ammeter from being easily read. Such
27、defects include electrostatic effects, scratches, chips, cracks, striae, or craze. This requirement applies both before and after the tests specified herein. soldering metal-to%etal, or metal-to-glass, or by any other neans which will enable the ammeter to withstand the tests specified herein. 3.5.3
28、 Cases. The ammeter cases shall be made of molded thermosetting plastic material, The cases shall be designed and constructed 3.5.5 Sealin . The ammeter cases shall be sealed by means of gaskets, by fusing or 3.5.6 Scale and pointer. 3.5.6.1 Scale construction. The scale shall be made of stiff mater
29、ial firmly supported and secured to its mounting. Paper scales will be satisfactory only when adequately bonded Co an backed by a metal support. The scale shall Le of such material and so secured as to insure freedom from warping, fading, or other deterioration during the tests specified here- in. T
30、he scale shall be bilevel (formed so that the scale divisions lie in the same plane as the pointer). recessed so that the pointer can swing over it. The divisions and numbers (for example, O, 1, 2, and so forth) shall be printed on the other scale level. The color scheme for the dial shall be either
31、 white scale background with black markings, or black scale background with white translucent markings (see 1.2.1.4). The quantity being measured shall be printed on the scale level which is 3.5.6.2 Scale length and marking. 3.5.6.2,l Len th The minimum scale length shall Le 4-inches for the 5-inch
32、ammeter and 6.3 inches f PROVISLOijS 4.1 Res onsibilit for inspection. Unless otherwise specified in the contract or purchase o-iz is responsible for the performance of all inspection require- ments as specified herein. Except as otherwise specified in the contract or order, the supplier may use his
33、 own or any other facilities suitable for the performance of the inspec- tion requirements specified herein, unless disapprove8 by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure
34、supplies and serviccs conform to prescribed requirements. 4.1.1 Test e ui ment and inspection facilities. Test equipment and inspection facili- ties shall ba s:ff?cients Production inspection. Every ammeter offered for delivery shall be subjected Table II - Production inspection, Applicable Test Par
35、agraph 4.6.3 USAS C39.1 USAS C39.1 USAS C39.1 USAS C39.1 . 4.6 Inspection details. 4.6.1 Shock. Two of the three ammeters of each size tested in 4.3 shall be subjected to high-impa-ock tests in accordance with type C of MIL-S-901 for lightweight equip- ment when mounted on fixture 6D-1 as shown on f
36、igure 7-1 of MIL-S-901. During the test, one sample shall be energized to approximately the center scale value. The other sample shall be deenergized. Wiring connected to the energized sample shall be firmly attached to the panel at a point 18 inches or less from the sample. The pointer shall be res
37、et to zero after each blow. Sequence of shock blows shall be back, top, side. At the com- pletion of the shock test, the meters shall be checked for error of indication, then dis- assenbled and examined for damage. ance with type I of MIL-STD-167. The change in indication and friction error shall be
38、 determined, after reset to zero, if required, and the meter shall be examined for evidence of breakage, permanent deformation or loosening of parts. 4.6.2 Vibration. Ammeters tested in 4.6.1 shall be subjected to vibration in accord- . #-*6.3 Visual and mechanical examination. Visual and mechanical
39、 examination shell be p. a MIL-M-24357 66 777770b 0422b45 2 i.iIL-M-24359 (SHIPS) 5.2.1 Preservation packaging (see 6.1). 5.2.1.1 Level A. meters and mounting hardware shall be individually protected Prior to packaging, all and unit-packagednaccordance with method III of NIL-P-116. ammeters shall be
40、 suitable damped as necessary utilizing a wire or other shunt. ance with the suppli the case liners shall be closed ana sealed in accordance with the appendix thereto. Case liners for boxes conforming to PPP-3-636 may be omitted provided the center and edge seams and manufacturers joints are sealed
41、with tape, at least 1-1/2 inches wide, conforming to PPP-T-76, Box closures an6 strapping shall be as specified in the applicable box speci- fication or appendix thereto. Fiber boxes conforming to PPP-B-636 may be banded with tape conforming to type IV of PPP-“-97 and appendix thereto in lieu of ste
42、el straps. The gross weight of wood boxes shall not exceed 200 pounds; fiberboard boxes shall not exceed the weight limitations of the applicable box specification. type wirebound woocl, wood-cleated fiberboard, wood-cleated, plywood, nailed wood, fiber (class 1 or 2, as Specified (see G.1) ) or woo
43、d-cleated paper-overlaid boxes conforming to PPP-U-576, PPP-L3-585, PPP-3-591, PPP-9-601, PPP-621, and PPP-3-636, respectively, at the option of the supplier. ox closares shall be as specified in the applicable box specification or appendix thereto, The gross weight of wood boxes shall not exceed 20
44、0 pounds; fiberboard boxes shall not exceed the weiqht limitations of the applicable box specification. 5.2.2.3 Level c. Ammeters packaged as specified (see 6.1) shall be packed in con- tainers of the-, size, and kind commonly used for the purpose, in a manner that will insure acceptance by coimon c
45、arrier anci safe delivery at destination. Shipping containers shall comply with the Uniform Freight Classification pules, or regulations of other carriers as applicable to the mose of transportation. form in shapeize, shall be of minimuni ciilje anci tare consistent with the protection required, ana
46、 shall contain identical quantities of identical itens. unit packages, intermediate packages, ana exterior shipping containers shall be marked in accordance with NIL-STD-129 (see G .1) 1. 5.2.2.2 Level B. Ammeters packaged as specfiee (see 6.1) shall be packe in domestic 5.2.3 General. Insofar as po
47、ssible ancf practical, exterior containers shall be uni- 5.2.4 Blarkin . In addition to any special markinn required by tne contract or order, 5.3 se of polystyrene (loose-fill) naterial. 5.3.1 For domestic sili nient and early e ui nient installation and level C packaging and ackin .-;nless othen?i
48、Oe appro“d by tii: procuring activity (sec 6.1), use of poly- -r%&!ose-f ill) material for domestic shipment and early equipment installation and level C packaging and packing applications such as cushioning, filler and dunnage is pro- hibited. When approved, unit packages anci containers (interior
49、and exterior) shall be marked and labelled as follows: “CAUTION Contents cushioned etc. with polystyrene (loose-fill) material. Remove and discard loose-fill inaterial before shipboard storage. If required, recushion with cellulosic rilaterial bound fiber, fiberboard or trans- -= . = 6- Nok: toa bc-taken - aboard ship. parent flexible cellular naterial.“ 5.3.2 FCX level h packaging and level A B packing. Use of polystyrene (loose- fill) materiiprohrbite for llckaging-and level A aiid 3 pack
