1、Designation: F2046 00 (Reapproved 2017) An American National StandardStandard Specification forTachometers, Various1This standard is issued under the fixed designation F2046; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、 of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This specification covers va
3、rious tachometers capable ofmeasuring rotational shaft speed.1.2 Special requirements for tachometer types used in navalshipboard applications are included in Supplement S1.1.3 The values stated in SI units are to be regarded asstandard. The values given in parentheses are mathematicalconversions to
4、 inch-pound units that are provided for informa-tion only and are not considered standard.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standard
5、s, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D3951 Practice for Commercial Packaging3. Terminology3.1 Definitions:3.1.1 SI (Le Systeme International dUnites) Units, nunitsof measurement rec
6、ognized by the Comite International desPoids et Mesures (CIPM).3.1.2 tachometer, nan instrument capable of generating,transmitting, and indicating information or signal that can beconvened into a function of rotational speed.4. Classification4.1 Design TypesThe following are among the types oftachom
7、eters available:(1) Centrifugal;(2) Centrifugal, flexible drive;(3) Chonometric;(4) Electrical, alternating current (ac) voltage responsive,direct drive;(5) Electrical reactance;(6) Electrical, magnetovoltmeter, direct drive;(7) Electrical, magnetovoltmeter;(8) Frequency responsive, electrical contr
8、ol box andvoltmeter, direct drive;(9) Frequency sensitive, electrical, nonrotating magneticpickup, direct drive, consists of a magnetic pickup, transducer,and indicator;(10) Photoelectric;(11) Digital contact;(12) Centrifugal, flexible drive; and(13) Vibrating resonant reed.5. Ordering Information5.
9、1 The buyer shall provide the manufacturer with all of thepertinent application data in accordance with the acquisitionrequirements, 5.2.5.2 Acquisition RequirementsAcquisition documents shallspecify the following:(1) Title, number, and date of this specification;(2) Quantity of tachometers required
10、;(3) Range;(4) Manufacturers part number;(5) When qualification inspection is required;(6) Final disposition of qualification test samples;(7) Type of electrical connection;(8) Mounting method;(9) Environmental requirements;(10) Materials;(11) Size and weight restrictions;(12) Critical service life
11、requirements;(13) Performance requirements;(14) Surface finish requirements;(15) Cleaning requirements;(16) When certification is required;(17) Marking requirements;(18) Packaging requirements; and(19) Preservation requirements.1This specification is under the jurisdiction of ASTM Committee F25 on S
12、hipsand Marine Technology and is the direct responsibility of Subcommittee F25.10 onElectrical.Current edition approved Aug. 1, 2017. Published August 2017. Originallyapproved in 2000. Last previous edition approved in 2011 as F2046 00 (2011).DOI: 10.1520/F2046-00R17.2For referenced ASTM standards,
13、visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428
14、-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technic
15、al Barriers to Trade (TBT) Committee.16. Materials and Manufacture6.1 Material SelectionThe materials for all parts shall beselected for long-term compatibility with the environment inwhich the tachometer will be installed or used.6.2 Material InspectionThe manufacturer shall be respon-sible for ens
16、uring that materials used are manufactured,examined, and tested in accordance with the specifications andstandards as applicable.7. Physical Properties7.1 Size and WeightThe buyer may have intended appli-cations where size and weight are limited. Size and weightlimitations shall be specified in the
17、acquisition requirements.8. Performance Requirements8.1 Service LifeThe buyer may have a minimum specifiedservice life requirement. Critical service life requirements shallbe specified in the acquisition requirements.8.2 Tachometer PerformancePerformance tolerances areusually specified in percentage
18、 of range span. The followingperformance characteristics and environmental exposures mayor may not be important to each buyers intended application.(1) Accuracy,(2) Repeatability,(3) Damping,(4) Temperature,(5) Humidity,(6) Salt spray,(7) Vibration,(8) Shock, and(9) Electromagnetic interference (EMI
19、).9. Workmanship, Finish, and Appearance9.1 Cleaning, Finish, and AppearanceAny specialcleaning, surface finish, and appearance requirements shall bespecified in the acquisition requirements.10. Inspection10.1 Classification of InspectionsThe inspection require-ments specified herein are classified
20、as follows:(1) Qualification testing, and(2) Quality conformance testing.10.2 Qualification TestingQualification test requirementsshall be specified, where applicable. Test methods should beidentified for each design and performance characteristicspecified. Test report documentation requirements sho
21、uld alsobe specified.10.3 Quality Conformance TestingQuality conformanceinspection is accomplished when acceptance and qualificationtesting is satisfied by a previous acquisition or when theproduct has demonstrated reliability in similar applications.Quality conformance inspection is usually less in
22、tensive thanacceptance and qualification, often verifying that samples of aproduction lot meet a few critical performance requirements.11. Number of Tests and Retests11.1 Test SpecimensThe number of test specimens to besubjected to qualification testing shall depend on the tachom-eter design. If eac
23、h range is covered by a separate and distinctdesign, a test specimen for each range will require testing. Ininstances in which a singular design series may cover multipleranges and types, it is recommended that three test specimensbe tested provided the electrical and mechanical similarities areappr
24、oved by the buyer. In no case, however, should less thanthree units, one unit each representing low, medium, and highranges, be tested, regardless of design similarity.12. Test Methods12.1 TestsAll tests shall be performed in accordance withASTM, American Society of Mechanical Engineers (ASME),or in
25、dustry standards as specified.12.2 Test DataAll test data shall remain on file at themanufacturers facility for review by the buyer upon request. Itis recommended that test data be retained in the manufacturersfiles for at least three years or a period of time acceptable to thebuyer and manufacturer
26、.13. Quality Assurance Provisions13.1 Warranty:13.1.1 Responsibility for WarrantyUnless otherwisespecified, the manufacturer is responsible for the following:(1) All materials used to produce a unit and(2) Manufacturer will warrant his product to be free fromdefect of workmanship to produce the unit
27、.14. Certification14.1 When specified in the purchase order or contract, thebuyer shall be furnished certification that samples representingeach lot have been either tested or inspected as directed in thisspecification, and the requirements have been met. Whenspecified in the purchase order or contr
28、act, a report of the testresults shall be furnished.15. Product Marking15.1 User-specified product marking shall be listed in theacquisition requirements. The minimum data to be clearlymarked on each tachometer shall include the following:(1) Manufacturers name,(2) Manufacturers part number,(3) Seri
29、al number or lot number,(4) Date of manufacture, and(5) Range.16. Packaging and Package Marking16.1 Packaging of Product for DeliveryProduct shall bepackaged for shipment in accordance with Practice D3951.16.2 Any special preservation, packaging, or package mark-ing requirements for shipment or stor
30、age shall be identified inthe acquisition requirements.17. Keywords17.1 tachometerF2046 00 (2017)2SUPPLEMENTARY REQUIREMENTSThe following supplementary requirements established for U.S. Naval shipboard application shallapply when specified in the contract or purchase order. When there is conflict be
31、tween this standard(Specification F2046) and this supplement, the requirements of this supplement shall take precedencefor equipment acquired by this supplement. This document supersedes MIL-T-16049C, Tachometers:Electrical; Self-Generating; Mechanical, Fixed Mounting, and Hand Held; and Vibrating R
32、eed, fornew ship construction. This document also supersedes MIL-T-24797, Tachometers, Fiber Optic,(Naval Shipboard Use), (Metric) General Specification for, for new ship construction.TACHOMETERS: ELECTRIC AND FIBER OPTIC, FIXED MOUNTINGS1. ScopeS1.1 This supplement covers single-range noncontact el
33、ec-tric and fiber-optic tachometers capable of generating,transmitting, and indicating information or signal that can beconverted into a function of rotational speed. The subjecttachometers may be used in shipboard systems, such as gasgenerators, power turbines, propulsion shafts, and gas steamturbi
34、ne generators.S1.2 Vibrating reed resonant-type tachometers are not cov-ered in this specification.S1.3 The values stated in SI units are to be regarded asstandard. The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not con
35、sidered standard.S2. Referenced DocumentsS2.1 Commercial Documents:S2.1.1 ASTM Standards:2B117 Practice for Operating Salt Spray (Fog) ApparatusD3951 Practice for Commercial PackagingS2.1.2 ANSI/ISA Standards:3ANSI/ISA S37.1 (R-1982) Electrical Transducer Nomencla-ture and TerminologyANSI/ASQC Q9001
36、-1994 Quality SystemsModel forQuality Assurance in Design, Development, Production,Installation, Inspection, Testing, and ServicingS2.1.3 Electronic Industries Association (EIA) Standards:4RS-422 Electrical Characteristics of Balanced Voltage Digi-tal Interface Circuit455-22 FOTP-22 Ambient Light Su
37、sceptibility of FiberOptic Components455-34 FOTP-34 Interconnection Device Insertion Loss TestS2.2 Government Documents:S2.2.1 Military Standards:5MIL-STD-461 Electromagnetic Interference Characteristicsof Subsystems and Equipment, Requirements for the ControlofMIL-STD-167-1 Mechanical Vibrations of
38、 ShipboardEquipment (Type IEnvironmental and Type IIInternallyExcited)S2.2.1 Military Specifications:5MS3452 Connector, Receptacle, Electric, Box Mounting,Rear Release, Crimp Contact, AN TypeMS3456 Connector, Plug, Electrical, Rear Release, CrimpContact, AN TypeMIL-C-5015 Connectors, Electrical, Cir
39、cular Threaded, ANType General Specification forMIL-M-24794 Material, Index Matching, Fiber OpticsMIL-F-49291 Fiber, Optical, (Metric), General Specifica-tions forMIL-C-83522 Connectors, Fiber Optic, Single Terminus,General Specification forMIL-C-83522/16 Connector, Fiber Optic, Single Terminus,Plug
40、, Adapter Style, 2.5 mm Bayonet Coupling, EpoxyMIL-C-83522/17 Connector, Fiber Optic, Single Terminus,Adapter, 2.5 mm Bayonet Coupling, Bulkhead Panel MountMIL-C-83522/18 Connector Fiber Optic, Single Terminus,Adapter, 2.5 mm Bayonet Coupling, PC MountMIL-C-85045 Cables, Fiber Optic, (Metric), Gener
41、al Speci-fication forMIL-S-901 Shock Tests, H.I. (High Impact), ShipboardMachinery, Equipment, and Systems, Requirements forS3. TerminologyS3.1 DefinitionsTerms marked with “ANSI/ISA S37.1”are taken directly from ANSI/ISA S37.1 (R-1982) and areincluded for the convenience of the reader.3Available fr
42、om American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.4Available from IHS Markit Ltd, https:/ from DLA Document Services, Building 4/D, 700 Robbins Ave.,Philadelphia, PA 19111-5094, http:/quicksearch.dla.mil.F2046 00 (2017)3S3.1.1 ambient c
43、onditions, nconditions, such as pressureand temperature, of the medium surrounding the case of asensor.ANSI/ISA S37.1S3.1.2 calibration, ntest during which known values ofmeasurands are applied to the sensor and corresponding outputreadings are recorded under specific conditions.ANSI/ISA S37.1S3.1.3
44、 environmental conditions, nspecified externalconditions, such as shock, vibration, and temperature, to whicha sensor may be exposed during shipping, storage, handling,and operation.ANSI/ISA S37.1S3.1.4 error, nthe error for a given value of the inputvariable (measurand) is the difference between th
45、e measuredvalue of the output signal and the expected value of the outputsignal. The expected value of the output signal for any value ofthe measurand shall be represented by a straight line whose endpoints are given by:S3.1.4.1 The specified value of the output signal at theminimum input value of t
46、he measurand (for example, 4 mA atthe minimum specified rotational speed).S3.1.4.2 The specified value of the output signal at themaximum input value of the measurand (for example, 20 mAat the maximum specified rotational speed).S3.1.5 noncontact tachometer, nany type of tachometerthat senses or res
47、ponds to rotational speed without physicalcontact or mechanical connection to the shaft being measured.S3.1.6 operating environmental conditions,nenvironmental conditions during exposure to which asensor must perform in some specified manner.ANSI/ISA S37.1S3.1.7 optical, adjinvolving the use of ligh
48、t-sensitivedevices to acquire information.S3.1.8 optical fibera very thin filament or fiber, made ofdielectric materials, that is enclosed by material of lower indexof refraction and transmits light throughout its length byinternal reflections.S3.1.9 optoelectronics module, na component of the fiber
49、optic tachometer that contains the optical source and detector,and signal conditioner devices necessary to convert the sensedrotational speed to a specified output signal.S3.1.10 output, nelectrical or numerical quantity, pro-duced by a sensor or measurement system, that is a function ofthe applied measurand.S3.1.11 range, nmeasurand values, over which a sensor isintended to measure, specified by their upper and lower limits.ANSI/ISA S37.1S3.1.12 repeatability, nability of
