Designation:A932/A932M−01(Reapproved2012)StandardTestMethodforAlternating-CurrentMagneticPropertiesofAmorphousMaterialsatPowerFrequenciesUsingWattmeter-Ammeter-VoltmeterMethodwithSheetSpecimens1ThisstandardisissuedunderthefixeddesignationA932/A932M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstestsforvariousmagneticpropertiesofflat-castamorphousmagneticmaterialsatpowerfrequencies(50and60Hz)usingsheet-typespecimensinayoke-typetestfixture.Itprovidesfortestingusingeithersingle-ormultiple-layerspecimens.NOTE1—Thistestmethodhasbeenappliedonlyatfrequenciesof50and60Hz,butwithproperinstrumentationandapplicationoftheprinciplesoftestingandcalibrationembodiedinthetestmethod,itisbelievedtobeadaptabletotestingatfrequenciesrangingfrom25to400Hz.1.2Thistestmethodprovidesatestforspecificcoreloss,specificexcitingpowerandacpeakpermeabilityatmoderateandhighfluxdensities,butisrestrictedtoverysoftmagneticmaterialswithdccoercivitiesof0.07Oe[5.57A/m]orless.1.3Thetestmethodalsoprovidesproceduresforcalculatingacpeakpermeabilityfrommeasuredpeakvaluesoftotalexcitingcurrentsatmagneticfieldstrengthsuptoabout2Oe[159A/m].1.4Explanationofsymbolsandabbreviateddefinitionsappearinthetextofthistestmethod.TheofficialsymbolsanddefinitionsarelistedinTerminologyA340.1.5ThistestmethodshallbeusedinconjunctionwithPracticeA34/A34M.1.6Thevaluesstatedineithercustomary(cgs-emuandinch-pound)orSIunitsaretoberegardedseparatelyasstandard.Withinthisstandard,SIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnoncon-formancewiththisstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheus...
