Designation:D4496−21StandardTestMethodforD-CResistanceorConductanceofModeratelyConductiveMaterials1ThisstandardisissuedunderthefixeddesignationD4496;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofelectricalresistanceandelectricalresistivityofmaterialsthataregener-allycategorizedasmoderatelyconductiveandareneithergoodelectricalinsulatorsnorgoodconductors.1.2Thistestmethodappliestothematerialsthatexhibitvolumeresistivityintherangeof100to107Ω-cmorsurfaceresistivityintherangeof103to107Ω(persquare).1.3Thistestmethodisdesignedformeasurementsatstandardconditionsof23°Cand50%relativehumidity,butitsprinciplesofoperationcanbeappliedtospecimensmeasuredatlowerorhighertemperaturesandrelativehumidities.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Specificprecautionarystatementsaregivenin8.3.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D257TestMethodsforDCResistanceorConductanceofInsulatingMaterialsD374/D374MTestMethodsforThicknessofSolidElectri-calInsulationD618PracticeforConditioningPlasticsforTestingD991TestMethodforRubberProperty—VolumeResistiv-ityOfElectricallyConductiveandAntistaticProductsD1711TerminologyRelatingtoElectricalInsulation2.2ASTMAdjuncts:Carbonblacktestcell(twodrawings)33.Terminology3.1Definitions:3.1.1moderatelyconducti...
