Designation:F2046−00(Reapproved2011)AnAmericanNationalStandardStandardSpecificationforTachometers,Various1ThisstandardisissuedunderthefixeddesignationF2046;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoversvarioustachometerscapableofmeasuringrotationalshaftspeed.1.2SpecialrequirementsfortachometertypesusedinnavalshipboardapplicationsareincludedinSupplementS1.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.2.ReferencedDocuments2.1ASTMStandards:2D3951PracticeforCommercialPackaging3.Terminology3.1Definitions:3.1.1SI(LeSystemeInternationald’Unites)Units—unitsofmeasurementrecognizedbytheComite’InternationaldesPoidsetMesures(CIPM).3.1.2tachometer—aninstrumentcapableofgenerating,transmitting,andindicatinginformationorsignalthatcanbeconvenedintoafunctionofrotationalspeed.4.Classification4.1DesignTypes—Thefollowingareamongthetypesoftachometersavailable:(1)Centrifugal;(2)Centrifugal,flexibledrive;(3)Chonometric;(4)Electrical,alternatingcurrent(ac)voltageresponsive,directdrive;(5)Electricalreactance;(6)Electrical,magnetovoltmeter,directdrive;(7)Electrical,magnetovoltmeter;(8)Frequencyresponsive,electricalcontrolboxandvoltmeter,directdrive;(9)Frequencysensitive,electrical,nonrotatingmagneticpickup,directdrive,consistsofamagneticpickup,transducer,andindicator;(10)Photoelectric;(11)Digitalcontact;(12)Centrifugal,flexibledrive;and(13)Vibratingresonantreed.5.OrderingInformation5.1Thebuyershallprovidethemanufacturerwithallofthepertinentapplicationdatainaccordancewiththeacquisitionrequirements,5.2.5.2AcquisitionRequirements—Acquisitiondocumentsshallspecifythefollowing:(1)Title,number,anddateofthisspecification;(...
