1、# for public mle8sc and male; its bistzibution is unlimited. 20 April 1971 SUPERSEDING MIL-I-17244D (SHIPS) 7 November 1969 (See 6.9) MILITARY SPECJFXCATLON 113DICATORSr TEMPERATURE, DIRECT-READING, BIMETALLIC, (3 AND 5 INCH DIAL) 1. SalPE . This specification covers bimetallic, shock-resistant, dir
2、ect-reading of the 3 and 5 inch dial sizes. 1.2 Classification. Temperature indicators shall be of a design having the following variables (see 6.3) : - i I i- * msrgn Dial size RUii Case form Stem tngth (see 1.2.1) (see 1.2.2) (see 1.2.3) (see 1.2.4) (see 1.2.5) 1.2.1 Design. Indicator design shall
3、 be one of the following: Symbol Instrument design ITD Indicator, temperature, direct reading ITM Indicator, temperature, max-and-min 1.2.2 Dial size. Indicator dial size snall be one of the following: Symbol =.diameter (inches) 3 3 inches 5 5 inches 1.2.3 Range. Indicator temperature ranges shall b
4、e one of the following: Symbol Ranges OF. 18 -40 to 180 55 SO to 550 75 50 to 750 12 200 to 1200 24 20 to 240 1.2.4 Case form. Indicator case form shall be one of the following: symbol Forms (see figure 1) A Back connected O Bottom connected 1.2.5 Stem length. Stem lengths shall be as follows: Symbo
5、l Stem length (see figure 2) 2 2 inches 4 4 inches 6 6 inches W685 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-I-L7244E bb m 9997306 OL29r12 4 W I(IL-f-l7244E(StlIPS) 2. APPLICABLE DOCUMENTS I 2.1 The following documents of the Laau an effec
6、t on date of invitation for bids or request for proposal, form a part of the apccafrcation to the extent specified herein. SPECIFICATIONS PKDERAL L-P-516 - Plastic Sheet and Plastic Rod, Thermosetting, Cast. L-T-80 - Tape, Pressure-Sensitive Adhesive (Aluminum-Backed). MILITARY . XIL-S-901 - Shock T
7、ests, H.I. (High-Impact); Shipboard Machinery, Equipment and Systems, Requirements for. MIL-0-1000 - Drawings, Engineering and Associated Lists. 1-1000/2 - Drawings, Engineering and Associated Liste. MIL-P-5516 - P8cking, Preformed, Petroleum Hydraulic Fluid Resistant, 160.F. MIL-0-9858 - Quality Pr
8、ogram Requirements. MIL-P-15137 - Provisioning Technical Documentation for Repair Parts for MIL-G-23652 - Gasket and Packing Material Petroleum and Phosphate Ester Fluid XIL-W-21270 - Wells for Indicators or Thermal Elements, General Specification. Electrical and Mechanical Equipment (Naval Shipboar
9、d Use). Resistant. STANDARDS MILITARY XIL-Sn-129 - Harking for Shippent and Storage. MIL-STD-1.30 - Identification Ma.rkingof U.S. Military Property. MIL-STD-735 - Test Methods and Test EQuLpmmt for Thermometers Used in Machinery and Piping Systems. MIL-STD-758 - Packaging Procedures far Submarine R
10、epair Parts Utilizing Transparent, Flexible, Heat Sealable Film, HANDBOOK MILITARY H-1 - Cross-Index of Chemical Equivalent Specification and Identification Code (Ferrous and Nonferrous Alloys) . (Copie8 of specifications, standards, drawings and publications required by suppliers in connection with
11、 specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) the extant-i- Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. 2.2 Other ublications. The fol,lowing documents
12、 form a part of this specification to AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A-276 - Bot Rolled, Cold Finish Stainless and Heat Resisting Steel Bars. B-209 - Xluminum-Alloy Sheet and Plate. (Application for copies should be addressed to the American Society for Testing and Xaterials, 1916
13、 Race Street, Philadelphia, Pennsylvania 19103.) AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) B18.6.3-62 - Slotted and Recessed Head Machine Screws and Machine Screw Nuts. (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway, New York, New York 1001
14、8.) NATIONAN BUREAU OF STANDARDS HANDBOOK H-28 - Screw Thread Standards for Federal Service. (Application for copies should be addressed to the Superintendent of Documents, Govern- ment Printing Office, Washington, D.C. 20402.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted w
15、ithout license from IHS-,-,-flIL-I-L?ZqqE bb D 999990b OL294L3 b m HIL-1-17244E (SAIPS) UNIFORM CWSSIFICATION COMMITTEE Uniform Freight Classificatlon Rules. (Application for copies should be addressed to the Uniform Classification Cotmiittee, 202 Union Station, 516 West Jackson Boulevard, Chicago,
16、Illinois 60606.) (Technical society and technical association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Pmderal agencies.) 3. REQuIFm4ENTS # .l =“ alification. Indicators furnished under this specific
17、ation shall be products are qua i xe or listing on the applicable qualified products list at the time et for opening of bids (see 4.2 and 6.5). 3.2 Desi . Bimetal temperature indicators shall be furnished in the ITD or ITM de- mip. with+ onns in accordance with figure 1. Indicatoks shall include a b
18、imetal sensing element, enclosed in a metal protective tube, connected to the pointer stem on one end and the other end fixed in place inside the protebtive tube. The protective tube shall have.a permanent mark on the external surface at a d:Lstance as shown on figure 2 to designate iamrer8ion depth
19、 for calibrating without the well. Changes in temperature around the bi- tal sensing element shall cause a rotation of the indicating pointer. The protective tube shall be welded to the case, which encloses the dial and the indicating pointer. A transparent window shall be furnished to protect the d
20、ial and pointer. Means shall be provided, external to the case, for adjusting the calibration at least five subdivisions. The calibration device shall be slotted in accordance with ANSI B18.6.3 and shall be identi- fied on the case. A bezel 8hall be attached to the case to hold the window securely i
21、n place. The entire enclosure shall be gas-tight. stem in the *and tightening the jam nut shall prevent loosening or swiveling of the indicator under all conditions of testing. satisfies thedng : t 3.2.1 Wells. Wells shall be in accordance with MIL-W-24270. Inserting the indicator 3.2.2 Numberin sys
22、tem. Each manufacturer shall have a numbering system which (a) Identifies manufacturer and model number. (b) Furnishes a separate number for each variation in design. 3.3 Materials. Indicator parts shall be in accordance with table r. Wells shall be in accordance with 3.2.1. Chemically equivalent me
23、tal materials in accordance with MIL- HDBK-1 may be substituted for those specified herein as long as the physical and chemical characteristics are similar. -i - , L Table I - Materials. Indicator Additional Material part requirements specification Material tase Dials shall have a white or ASTM-A-27
24、6 Corrosion-resisting Dial Case shall have satin or ASTM-A-276, Corrosion-resisting s tee 1 silvered background with black steel brushed finish. 300 series graduation and markings. Aluminum ASTM-B-209 Kndows for appli- cable ranges: -40 to 18OOF. Plastic 20. to 24OOF. L-P-516, G3 SO0 to 550OF. Plast
25、ic L-P-516, G3 , Plastic L-P-516, G3 50. to 750OF. Surface compressed As approved (chemically) by NAVSEC glass sheets 200 to 1200OF. Surface compressed As approved (chemically) by NAVSEC glass sheets Gaskets less than 21OOF. on ranges i or below shall be suitable for not i MIL-P-5516 Buna N (for 180
26、F. Shapes as required. Gaskets : MIL-G-23652 Rubber I above 240OF. I 4 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Table I - Materials (Contd). Indicator Additional Material Part requirements specification Material Indicating pointer Pointer sh
27、all be nonreflective “”_ As approved by NAVS EC black and be of a plain and unembellished design. Xndex pointers (Maximum and minimum indicator ” As approved by NAVSEC only) . Pointers shall be painted red and shall be of. a plain and I unembellished design. Reset knob . (Maximum and minimum indicat
28、or Corrosion-resist- ASTM-A-2 i6 ing steel or brass (nickel plated) I ! shall be accessible I to the operator. Protective Corrosion-resist- ASTM-A-2 I6 All joints in the protective i tuba ing steel I tube shall be welded and leak tight. am nut Corrosion-resist- ASTM-A-276 l ing steel L ! 300 series
29、I L 3.4 Detailed desi n. Case forms, protective tube and stem dimensions and tolerances shall be as pacifie + on figures 1 and 2. # 3.4.1 ITM indicators. ITM indicators shall be identical to the ITD design except that it 8halrnclude 2 index pointers and a reset knob. The indicating pointer shall be
30、designed so it actuates the index pointers to indicate the maximum and minimum temperature experienced by the sensing element. The reset knob shall be designed to reset the index pointers without damage to the indicating pointer or mechanism and shall be sealed to maintain a gats-tight enclosure. 3.
31、4.2 Dials. Indicators shall be designed to have either 3 inch or 5 inch dial sizes. The 3 inch d-ize shall be used for all ranges up to and including SOo to 55OOF. The S inch dial size shall be used for ranges SOb to 75OOF. and 200. to 12OOOF. 3.4.2.1 Harkin S and raduations. The dial shall have a g
32、raduated arc which shall cover not less 4- t an Oxgrees T e units (OF.), manufacturers trademark, manufacturers , instrument number and Federal stock number (see 6.61, shall be indicated on the dial. The dial ranges and graduatipns shall be in accordance with table II and footnotes thereto, u pecifi
33、ed bee 6.3). t Table 11 - Scale graduations and accuracies. Range of scale AcCuraCyL 1 Number of degrees between graduations - + OF. Number of degrees Maximum I between numbers 1 dial indicator; OF. i v -40 to 180 20 to 240 20 160 2.2 2 100 i 750 7 .O 10 SO to 750 50 550 5.0 t 5 50 to SS0 20 240 2.2
34、 2 I an exploratory 1 4.6.7.1 E lorator Vibration test. The indicator shall be subjected to a rapid (i 4.6.7.1.1 Subsequent to the rapid exploratory,scan, the indicator shall be subjected to 8 detailed resonance search from 500 Hz to 5 Hz in 5 Hz increments. Each 5 Hz incre- rantal frequency shall b
35、e maintained for a minimum of wo minutes. Additionallyr any fre- quency where resonance of any part of the indicator was detected during the initial rapid exploratory test shall be subjected to the two ninute detail resonance search. Dioplace- rant. shall be as Specified in table X. 4.6.7.1.2 During
36、 the exploratory vibration tests the indicator shall perform within the limits of table IV. Testing will be terminated when and if the indicator exceeds the performance limits of table IV. # Table X - Displacement criteria. c $requency range (Hz) Displacement (inches, peak to peak) 5 to 20 0.300 21
37、to 500 22.67 (Freq. 1 -1.5 I 4.6.7.2 Vibration endurance tes. The vibration endurance test shall include tests designed to evaluate the vibrationa effects on the bimetallic element (see 4.6.7.2.1) r and the effects of vibration on component wear (see 4.6.7.2.2). I 4.6.7.2.1 Vibration endurance test
38、of bimetallic element. The endurance test of th bimetallic element ahall be run at theresonant frequency producing the most damage .e potential during the exploratory test. Generally, this is- the resonant frequency pro- ducing the greatest pointer oscillation. Displacement shall be in accordance wi
39、th table X. The test shall be run for one hour or until the indicator fails to meet the performance requirements of table IV, whichever occurs first. If performance requirements are met during the test, an accuracy verification must be performed. fun at the frequency causing + t e worst excitation o
40、f the indicator case as noted during the exploratory test. Test duration shall be 100 hours or until significant wear or damage is produced, whichever occurs first. Displacements shall be in accordance with table X. Accuracy verification must be performed subsequent to this test. In the event that t
41、he case does not exhibit a resonant frequency anywhere in the test frequency range, the wear test shall be run at 400 Hz. If significant wear occurs in less than 100 hours or pointer be- testing shall be terminated. Performance requirements are specified in table IV. include the m= I 4.6.7.2.2 Vibra
42、tion c0 onent wear test. The vibration component wear test shall be . havior,does not meet performance requirements during the wear test, the sample fails and 4.6.8 Shock test. Shock test shall be conducted as specified in MIL-STD-735 and shall (a) Indicator shall be mounted in accordance with fixtu
43、re 4C, mounting platform No. 2 Of MIL-S-901. The indicator shall be rnounted not nearer than 3 inches from the side and rear of the platform. (b) No electrical-load conditions. (c) Indicator shall undergo calibration check after shock test. (d) Calibration shift shall be within the requirements of t
44、able IV. stabilitv teldcon m mF.ur,to 750 F. ;i.il. sufficient Preservation to afford and adequate packaging protection which may against be the sup- cormion, deterioration and physical damage during shipment from the supply source to the mim activity and until early installation. 5.1.1.2 Packinq. P
45、acking shall be accomplished in a manner which will insure accept- ance by CorrmOn carrler at the lowest rate and will afford protection against physical or rechanical damage during direct shipment from the supply source,to the using activity for early installation. The shipping containers or method
46、 of packing shall conform to the Uniform Freight Classification Rules or other carrier regulations, as applicable to the rode of transportation and may conform to the suppliers commercial practice. 5.1.1.3 Ma.kin . Shipment marking information shall be provided on interior packages and exterior 8 xp
47、ping containers in accordance with the contractors commercial practice. The information shall include nomenclature, Federal stock number or manufacturers part zkIlEpkr, contract or order number, contractors name and destination. 5.1.1.4 Onboard re air arts (assembled indicators). Repair parts for on
48、board stowage and future use=bea- 5.3.1 For domestic shipment and earl e ui ment installation level C_ acka in - “ -. rty- 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 pa
49、ckages and containers (interior and acterior) shall be nrkd and labelied as follaws: “CAUTION Contents cushioned with polystyrene (loose-fill) material. Not to be taken aboard ship. Ramove and discard loose-fill material before shipboard storage. If required, recuahion with cellulosic material bound fiber, fiberboard or transparent flexible cellular material.“ Baterial is Kd-fkd?Acg-alved B packing applications such as cushioning, filler and dunnage. 5.
