【英文标准名称】:StandardTestMethodforAlternatingCurrentMagneticPropertiesofMaterialsUsingtheWattmeter-Ammeter-VoltmeterMethod,100to10000Hzand25-cmEpsteinFrame
【原文标准名称】:用瓦特计--安培计--伏特计法(100-10000赫兹)和25厘米艾普斯亭框测定材料的交流磁性能的试验方法
【标准号】:ASTMA348/A348M-2005
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:A06.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:alternating-current;ammeter;coreloss;customaryunits;Epstein;excitingpower;fluxvoltage;formfactor;incrementalmagnetization;induction;magnetic;magneticmaterial;magnetictest;permeability;voltmeter;wattmeter
【摘要】:Thistestmethodevaluatestheperformanceofflat-rolledmagneticmaterialsoverawidefrequencyrangeofacexcitationwithandwithoutincrementaldcbias,asusedontransformers,motors,andotherlaminatedcoredevices.Thistestmethodissuitablefordesign,specificationacceptance,serviceevaluation,andresearch.Theapplicationoftestresultsobtainedwiththistestmethodtothedesignorevaluationofaparticularmagneticdevicemustrecognizetheinfluenceofthemagneticcircuitryuponitsperformance.Somespecificitemstoconsideraresize,shape,holes,welding,staking,bolting,bracketing,shortingbetweenlaminations,acwaveform,adjacentmagneticfields,andstress.1.1Thistestmethodcoversthedeterminationofthemagneticpropertiesofflat-rolledmagneticmaterialsusingEpsteintestspecimenswithdouble-lapjointsinthe25-cmEpsteinframe.Itcoversdeterminationofcoreloss,rmsandpeakexcitingcurrent,excitingpower,magneticfieldstrength,andpermeability.Thistestmethodiscommonlyusedtotestgrain-orientedandnonorientedelectricalsteelsbutmayalsobeusedtotestnickel-iron,cobalt-iron,andotherflat-rolledmagneticmaterials.1.2ThistestmethodshallbeusedinconjunctionwithPracticeA34/A34MandTestMethodA343/A343M.1.3Testsunderthistestmethodmaybeconductedwitheithernormalacmagnetizationorwithacmagnetizationandsuperimposeddcbias(incrementalmagnetization).1.4Ingeneral,thistestmethodhasthefollowinglimitations:1.4.1FrequencyTherangeofthistestmethodnormallycoversfrequenciesfrom100to10000Hz.Withproperequipment,thetestmethodmaybeextendedabove10000Hz.Whentestsarelimitedtotheuseofpowersourceshavingfrequenciesbelow100Hz,theyshallusetheproceduresofTestMethodA343/A343M.1.4.2MagneticFluxDensity(mayalsobereferredtoasFluxDensity)-Therangeofmagneticfluxdensityforthistestmethodisgovernedbythetestspecimenpropertiesandbytheavailableinstrumentsandotherequipmentcomponents.Normally,formanymaterials,themagneticfluxdensityrangeisfrom1to15kG[0.1to1.5T].1.4.3CoreLossandExcitingPowerThesemeasurementsarenormallylimitedtotestconditionsthatdonotcauseatestspecimentemperatureriseinexcessof50Corexceed100W/lb[220W/kg].1.4.4ExcitationEitherrmsorpeakvaluesofexcitingcurrentmaybemeasuredatanytestpointthatdoesnotexceedtheequipmentlimitationsprovidedthattheimpedanceoftheammetershuntislowanditsinsertionintothetestcircuitdoesnotcauseappreciablyincreasedvoltagewaveformdistortionatthetestmagneticfluxdensity.1.4.5IncrementalPropertiesMeasurementofincrementalpropertiesshallbelimitedtocombinationsofacanddcexcitationsthatdonotcausesecondaryvoltagewaveformdistortion,asdeterminedbytheformfactormethod,toexceedashiftof10%awayfromsinewaveconditions.1.5Thevaluesandequationsstatedincustomary(cgs-emuandinch-pound)orSIunitsaretoberegardedseparatelyasstandard.Withinthisstandard,SIunitsareshowninbracketsexceptforthesectionsconcerningcalculationswherethereareseparatesectionsfortherespectiveunitsystems.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththisstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H21
【国际标准分类号】:29_030
【页数】:10P.;A4
【正文语种】:英语


【英文标准名称】:Soilimproversandgrowingmedia-Sampling
【原文标准名称】:土壤改良剂和生长基质.取样
【标准号】:BSEN12579-2000
【标准状态】:现行
【国别】:英国
【发布日期】:2000-03-15
【实施或试行日期】:2000-03-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:试样;报告;肥料;土壤学;土壤改良;抽样方法;土壤
【英文主题词】:Agriculture;Definition;Definitions;Fertilizers;Growingmedia;Inspection;Quantitativedetermination;Samplingmethods;Soilimprovement;Soilimprovingmaterials;Testing
【摘要】:ThisEuropeanStandardspecifiesmethodsforsamplinggrowingmediaandsoilimprovers(excludinglimingmaterials)forsubsequentdeterminationofqualityandquantity.Itoutlinestheprinciplestobetakenintoconsiderationwhentakingthesampleandensuringanadequatequantityisavailablefortesting.Thisstandardappliesonlytomaterialthatisinsolidform.NOTE1Thisstandardisintendedtobeusedbymanufacturers,buyersandenforcementagenciesinverifyingclaimsmadefortheseproducts.Itisnotintendedthatitshouldnecessarilybeusedforthepurposeofmanufacturingcontrol.NOTE2Therequirementsofthestandardmaydifferfromthenationallegalrequirementsforthedeclarationoftheproductsconcerned.
【中国标准分类号】:B11
【国际标准分类号】:65_080
【页数】:14P.;A4
【正文语种】:英语