1、MIL-T-24742 bb m 799970b 0429947 9 W INCH-POUND MIL-T-24742(SH) 26 April 1990 MILITARY SPECIFICATION TRANSDUCER, PRESSURE AND DIFFERENTIAL PRESSURE, MINIATURE (ELECTKICAL) (NAVAL SHIPBOARD USE) This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is av
2、ailable for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for miniature, electrical pressure and differential pressure transducers for Naval ships, but does not include the readout or display. 1.2 Classification. 1.2.
3、1 Designations. Designations shall be assigned as specified (see 6.2) and listed in the format below: M24742-D - F- 15C - S- DC - A Type Application Range Pressure Input output 1.2.1.1 1.2.1.2 1.2.1.3 1.2.1.4 1.2.1.5 1.2.1.6 Power 1.2.1.1 Type. The transducer type shall be designated by the single l
4、etter symbol as follows: D - Pressure, differential R - Pressure, (gauge, absolute and sealed) V - Pressure, vacuum C - Pressure, compound (gauge, vacuum) Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addre
5、ssed to: Commander, Naval Sea Systems Command, SEA 5523, Departntent of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. MiSC N/A FSC 6685 3. Approved for public release; d
6、ktribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1.2.1.2 ADDlication. The media pressure to be measured shall be indicated as follows : F - Freshwater, condensate, steam, nitrogen and other inert gases S - Seawater G - Flue ga
7、s and ammonia O - Oxygen H - Liquid hydrocarbons (for example: fuel oil, lube oil) 1.2.1.3 Range. The pressure range of the transducer shall be designated by two parts. The first part shall be the designator for the numerical value of the upper range except 30 for type V (see 3.3.3). The second part
8、 shall be the designator for the upper range unit of measure (see 3.3.3.1). 1.2.1.4 Pressure rating. The pressure rating shall be designated by the designator for its numerical value for type D transducers .(lX.“ for type R, V and C transducers) and shall be limited to the following: L 15 150 300 60
9、0 1500 3000 6000 PRESSURE RATING (POUNDS PER SQUARE INCH) TRANSDUCER TYPE “D“ Range Designator L . 1.2.1.5 Power suDp1y. The transducer wiring shall be determinedby the power supply as follows: dc - Two-wire. system used with a direct current (dc) supply ., - ac - Four-wire system used with an alter
10、nating current (ac) supply 1.2.1.6 OutDut. The electrical signal output of the transducer shall be designated by the following symbols (see 3.4.4): A - Milliampere (mA) v - Volt (V) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 SDecifications. standards. and handbooks. The following specif
11、i- cations, standards, and handbooks 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 Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the s
12、olicitation (see 6.2). 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-24742 bb W 9797906 0427949 2 W MIL-T-24742(SH) SPECIFICATIONS FEDERAL PPP-F-320 MILITARY MIL- S - 901 MIL-E-917 MS3102 MS3106 MIL-C-5015 MS16142 MIL-E-17555 MIL-L-19140 MI
13、L-S-19500 MIL-P-24423 MIL-M-38510 MIL-C-52211 STANDARDS MILITARY MIL-STD-108 - Fiberboard; Corrugated and Solid, Sheet Stock (Container Grade), and Cut Shapes. - Shock Tests, H.I. (High-Impact); Shipboard Machinery, Equipment and Systems, Requirements for. - Electric Power Equipment, Basic Requireme
14、nts for, (Naval Shipboard Use). - Connector, Receptacle, Electric, Box Mounting. - Connector, Plug, Electric, Straight, Solder - Connector, Electrical, Circular Threaded, General - Boss, Gasket and Seal Straight Thread Tube Fitting, - Electronic and Electrical Equipment, Accessories, $; Contacts, AN
15、 Type. Specification for. Standard Dimensions for. and Provisioned Items (Repair Parts): Packaging of. G,. 1( - Lumber and Plywood, Fire-Retardant Treated. - Semiconductor Devices, General Specification for. - Propulsion and Auxiliary Control Consoles and Associated Control and Instrumentation Equip
16、ment, Naval Shipboard Use, Basic Design Requirements. - Microcircuits, General Specification for. - Components and Assemblies for Industrial Gas Production, Storage and Transport Equipment, Packaging of, - Definitions of and Basic Requirements for Enclosures for Electric and Electronic Equipment. MI
17、L-STD-167-1 - Mechanical Vibrations of Shipboard Equipment- (Type I - Environmental and Type II - Internally Excited). Component Parts. MIL-STD-202 - Test Methods for Electronic and Electrical MIL-STD-278 - Welding and Casting Standard. MIL-STD-454 - Standard General Requirements for Electronic Equi
18、pment. MIL-STD-461 - Electromagnetic Emission and Susceptibility Requirements for the Control of Electromagnetic Interference . . Measurement of. - I P ” - .- .- - - “I ” MIL-STD-462 - Electromagnetic Interference Characteristics, MIL-STD-701 - Lists of Standard Semiconductor Devices. 3 Provided by
19、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.- MIL-T-24742 bb W 777770b 0427750 7 m MIL-T-24742(SH) (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order De
20、sk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 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 issues are t
21、hose cited in the solicitation, DRAWING NAVAL SEA SYSTEMS- COMMAND (NAVSEA) NAVSHIPS 810-1385846 - Oxygen System, Submarine Replenishment. (Application for copies of NAVSEA drawing should be addressed to: Commander, Portsmouth Naval Shipyard, Naval Engineering Drawing Support Activity, Code 202.2, P
22、ortsmouth, NH 03804-5000.) 2.2 Non-Government publications. The following document(s) form 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. Unle
23、ss otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). INSTRUMENT SOCIETY OF AMERICA (ISA) Recommended Practice 37.1 - Nomenclature and Specification Terminology for Aerospace Test Transducers with . Electrical Ou
24、tput. (Application for copies should be addressed to the Instrument Society of America, P.O. Box 12277, Research Triangle Park, NC 27709.) (Non-Government standards and other publications are normally available from the organizations that.prepare or distribute the documents. These documents also may
25、 be available in or through libraries or other informational services,) 2.3 Order of precedence. In the-event of a conflict between the text of this document and the references ci.ted herein (except for related MS standards), the text of this document takes precedence. Nothing. in this document, how
26、ever, supersedes applicable laws and regulations unless a specific 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 6.4), in accordance with 4.3. 3.2 DeSCriDtiOn. The equipment specified herein sha
27、ll convert a fluid pressure or differential pressure to a continuous linear proportional analog electrical dc signal. The transducer shall consist of the following components: (a) Detector to sense the fluid pressure or differential pressure, (b) Input power regulator. 4 Provided by IHSNot for Resal
28、eNo reproduction or networking permitted without license from IHS-,-,-MIL-T-24742 bb m 77777Ob 0427753 O m (c) Signal conditioner to convert the detector output to a continuous linear proportional analog electrical dc signal. 3.3 General reeuirements. Transducer equipment shall be in accordance with
29、 provisions as specified herein. The transducer components shall be packaged as a single unit. 3.3.1 Materials. Materials shall be in accordance with the prohibited and galvanic corrosion material requirements of MIL-3-917 and MIE-P-24423, and shall conform to requirement 4 sf MIL-STD-454 for fungus
30、 fnertness. 3.3.2 SensinP elements. The maeerfals for the force summing devices and wetted parts shall be R accordance with table I. TABLE I. merial. _ - Service fluid 1 - Fresh water, condensate, steam, nitrogen and other inert gases Sensing element and wetted parts Liquid Hydro- carbons (e.g., lub
31、e oil, fuel oil) Flue gas and ammonia 3xygen X X X CRES 304L 316 L and 321 CRES 15-5 PH X 17-4 PH X 17-7 PH Konel and X K-Monel Inconel 600 X and 750 Inconel 625 X and 718 X X “- “- X X X X “- X X lx X X Hastelloy C276 X lx X Titanium CP and 6A1-4V X “- “- lx 5 Provided by IHSNot for ResaleNo reprod
32、uction or networking permitted without license from IHS-,-,-MIL-T-24742 bb W 77777Ob 0427752 2 M 3.3.3 Rances. Transducer pressure ranges shall be in accordance with table II. 3.3.3.1 Units. The units shall be designated by the corresponding letter designator and are limited to the following: Design
33、ator A B C D E F G Units HG - Inches of mercury vacuum . PSIA - Pounds per square inch, absolute PSID - Pounds per square inch, differential PSIG - Pounds per square inch, gauge PSIS - Pounds per square inch, sealed at 14.7 PSIA WC - Inches of water column WCD - Inches of water column, differential
34、TABLE II. Ranges. Type D ranges ranges (PSID) ( WeD) Range Desig- Range Desig nator nato: 0-15 11 0-10 21 0-30 12 0-60 22 0-60 13 0-150 23 3-100 14 0-300 24 3-200 15 3-400 16 3-600 17 Type R Pressure ranges (PSIG , PSIA or PSIS*) Range Desig- nator 0-15 0-30 0-60 o- 100 o - 200 0-300 O - 600 o - 100
35、0 O- 1500 O - 3000 O - 6000 o-10,000 31 32 33 34 35 36 37 39 41 42 43 38 qater column canges (WC) tange 1-10 1-60 1-150 1-300 lesig- nator 71 72 73 74 * For upper range values of 1000 pounds per square inch Compound ranges (HG-O-PSIG) nator 30-0-100 30-0-150 30-0-300 iracuum range Xange I- 30 (lb/in
36、2) and above, lesig- nator 30 3,3.4 Output. The electrical signal output of the transducer shall be dc directly proportional to the pressure or differential pressure input. The output shall be a true current source of 4 to 20 milliamperes (mA) dc or true voltage source of O to 5 volts (V) dc. 3.3.4.
37、1 Current output. When a 4 to 20 mA current output i-s specified, the requirements specified herein shall be met regardless of external load resistance variations over a range of O to 250 ohms. The 4 mA output shall correspond to the Provided by IHSNot for ResaleNo reproduction or networking permitt
38、ed without license from IHS-,-,-MIL-T-24742 bb m 977790b 0429753 4 W lower pressure or differential pressure range vahue and the 20 mA output shall. correspond to the upper pressure differential pressure range value for the ranges specified in table II. 3.3.4.2 Voltave - outrut. Jhen a O to 5 volt o
39、utput is specified, the requirements specified herein shall be met for external load resistances exceeding 10Q thousand ohms. The 0 volt output shall Correspond to the lower pressure or differential pressure range valus and %ha 5 volt output shall correspond to the upper pressure or different%al K-S
40、SUIX range value for the ranges specified in table II. 3.4 -eneral reqsirsents . 3.4.1 Life. The transducer shall be constructed for a life of 40,000 hours of operation and shall meet the requirements specified herein when subjected to the following conditions encountered in Naval service: Inclinati
41、on (see 4.7.6). Supply voltage and frequency variations (see 4.7.7 and 4.7.10). Common mode pressure at pressure rating (see 4.7.8), type D only. Temperature (see 4.7.11) transducer ambient temperature operating Humidity (see 4.7.12). Pressure and differential pressure variations in the fluids from
42、Vibration (see 4.7.19). High shock (see 4.7.20). range: O to 65 degrees Celsius (“C). over range specified (see 4.7.17). 3.4 provided .2 Adiustments. Non-exposed adjustments for zero and span shall be for calibration purposes. 3.4.3 Enclosure. The transducer shall be splash proof as specified in MIL
43、-STD-108. 3.4.4 Transducer mountinq. The transducer shall have a mounting plate as shown on figure 1. If required in a specific application and with prior approval of NAVSEA, the transducer may be mounted by its pressure piping connection. For type D, the high pressure port shall be used. If the tra
44、nsducer is mounted by its pressure port, the mounting plate may be removed (see 6.2). 3.4.5 External confimration. The transducer shall have an external configuration conforming to figure 1. 3.4.6 Electrical connector, An electrical interface connector receptacle and mating plug, in accordance with
45、MIL-C-5015 shall be provided with each transducer. The electrical receptacle may be designed to include built-in radio frequency suppression elements. 3.4.6.1 -ut. The receptacle shall be an MS3102R14S-5P in accordance with MS3l02. Receptacle pin “A“ shall be positive 28 Vdc power input, pin “B“ sha
46、ll be negative 28 Vdc power input, and pin “C“ shall be case ground. Receptacle pins “A“ and 4Bt shall also serve as the 4-20 mA signal. output. The mating plug shall be an MS3lO6FI4S-5S in accordance with MS3106. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license
47、 from IHS-,-,-3.4.6.2 DC Dower inDut - V outDut. The receptacle shall be an MS3102R14S-5P in accordance with MS3102. Receptacle pin “A“ shall be positive 28 Vdc power, input, pin “B“ shall be negative 28 Vdc power input, pin “C“ shall be case ground, pin “D“ shall be positive 0-5 Vdc signal output,
48、and pin “E“ shall be negative 0-5 Vdc signal output. The mating plug shall be an MS3106F14S-5S in accordance with MS3106. 3.4.6.3 AC Dower inDut - A outDut. The receptacle shall be an MS3102R14S- 5PX in accordance with MS3102. Receptacle pins “A“ and “B“ shall be 115 Vac power input, pin “C“ shall b
49、e case ground, pin “D“ shall be positive 4-20 mA dc signal output, and pin “E“ shall be negative 4-20 mA dc signal output. The mating plug shall be an MS3106F14S-5SX in accordance with MS3106. 3.4.6.4 AC Dower input - V output. The receptacle shall be an MS3102R14S- 5PX in accordance with MS3102. Receptacle pins “A“ and “B“ shall be 115 Vac power input, pin “C“ shall be case ground, pin “D“ shall be positive 0-5 Vdc signal output and p
