Designation:E1995−12AnAmericanNationalStandardStandardTestMethodforMeasurementofSmokeObscurationUsingaConicalRadiantSourceinaSingleClosedChamber,WiththeTestSpecimenOrientedHorizontally1ThisstandardisissuedunderthefixeddesignationE1995;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisisafire-test-responsestandard.1.2Thistestmethodprovidesameansofmeasuringsmokeobscurationresultingfromsubjectingessentiallyflatmaterials,products,orassemblies(includingsurfacefinishes),notex-ceeding25mm[1in.]inthickness,inahorizontalorientation,exposedtospecifiedlevelsofthermalirradiance,fromaconicalheater,inthepresenceofapilotflame,inasingleclosedchamber.Optionaltestingmodesexcludethepilotflame.1.3Theprincipalfire-test-responsecharacteristicobtainedfromthistestmethodisthespecificopticaldensityofsmokefromthespecimenstested,whichisobtainedasafunctionoftime,foraperiodof10min.1.4Anoptionalfire-test-responsecharacteristicmeasurablewiththistestmethodisthemassopticaldensity(seeAnnexA1),whichisthespecificopticaldensityofsmokedividedbythemasslostbythespecimensduringthetest.1.5Thefire-test-responsecharacteristicsobtainedfromthistestarespecifictothespecimentested,intheformandthicknesstested,andarenotaninherentpropertyofthematerial,product,orassembly.1.6Thistestmethoddoesnotprovideinformationonthefireperformanceofthetestspecimensunderfireconditionsotherthanthoseconditionsspecifiedinthistestmethod.Forlimitationsofthistestmethod,see5.5.1.7UsetheSIsystemofunitsinrefereedecisions;seeIEEE/ASTMSI-10.Theinch-poundunitsgiveninbracketsareforinformationonly.1.8Thistestmethodisusedtomeasureanddescribetheresponseofmaterials,products,orassembliestoheatandflameundercontrolledconditions,butdoesnotbyitselfincorporateallfactorsrequiredforfirehazardorfireriskassessmentofthematerials,products,ora...
