日本ASKER橡膠硬度計B型TheASKERDurometerTypeBforsemi-rigidrubber(fromnormalhardnesstohighhardness),asspecifiedbyASTMD2240Itisusedformeasuringharderspecimens,suchasearthenwareclayormossedpottery,thantheTypeAdurometer,becausetheindentorisspring-loadedasintheASKERTypeA,butisaconicalshapeasintheASKERTypeD.FeaturesIndentorHeight:2.50mmShape:SharpConePointPressurefootThePressurefootincontactwiththespecimenis44mminwidthand18mmindepth,wideenoughtoensureaccuratemeasurement.TheLongerPressureFootType(Btype)isapplicableformeasurementofnarroworconcavespecimens.HardnessTesterSelectionChartOurproductlineconsistsofvarioustypesofdurometersapplicabletospecificmaterialsasindicatedinthechartabove.TypeADurometer(ASKERAtype),conformingtoJISK6235isthemostpopulartypeofdurometerformeasuringrubberhardness.However,verificationisrecommendedbecauseasignificantdifferenceisestimatedtobethelargestwhenadurometerindicatesmeasurementvaluesfrom10to90points.ForhardspecimensforwhichTypeADurometerreadingsindicatemorethan90points,measurementsshouldbeundertakenusingtheTypeDDurometer(ASKERDtype).However,forsoftspecimenswithmeasurementsoflessthan20points,theASKERCtypeorTypeEDurometer(ASKEREtype)shouldbeused.Themostimportantconsiderationinusingdurometersistoselectthecorrecttypeforpurposesofmeasurementaccordingtothespecimen.SpecificationStandardsASTMD2240Indicationrange0point-100point(262degreedialscale)Minimumindication1point(Accuracy: 1point)IndentorDesign(mm)Height:2.5030 AngleSharpConePointTipRadius0.1SpringForces[mN(g)]0point:550(56)100point:8050(821)CentralholeofdiameterofPressurefoot 3PressurefootDimension(mm)44 18(Rectangular)OuterDimension(mm)Approx.Width57 Depth30 Height76Weight(g)200ApplicationSemi-rigidrubber,EarthenwareclayOuterDimension(mm)Acustomdesignedpressurefootdurometerisavailableaccordingtospecimenconditions.OptionTwo-pointertype(max-handandactivehand)ofRubberHardnessTesterThestationarysethand(max-hand)makesthemaximumvalueeasiertoreadandallowsthecreepcharacteristicsofaspecimen.Accuratemeasurementismadepossibleforspecimens*forwhichstressrelaxationoccursovertimeorforspecimensforwhichitisdifficulttotakereadingsfromthefront.*Materialsforwhichthereadingdecreasesimmediatelyaftertheindentorhasbeenpressedagainstthesurface.ConstantLoaderforDurometer Constantloarderassuresuniformtestpressureeliminatingfalsereadingsduetodifferencesbetweenoperatorsinmeasuringbyhand. Highaccuracyandrepeatabilityofthehardnessreadingsareassuredbytheflexiblejointfunction.IndentorExtensionTester Thegaugetochecktheindentorheightonadurometerandthereadingindicatormechanism. Inspectionisconductedat2,50,and100pointsrespectively.LoadTesterforHardnessTester Testertocheckloadpropertiesofthespringonadurometer Inspectionisconductedat2,50,and75pointsrespectively.