Designation:D3847−01(Reapproved2018)StandardPracticeforRubber—DirectionsforAchievingSubnormalTestTemperatures1ThisstandardisissuedunderthefixeddesignationD3847;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthegeneralrequirementsforachievingandmaintainingtemperaturesbelow21°Cforther-malconditioningandphysicaltestingofrubber.1.2Thispracticedescribestheacceptabletypesandcon-structionoflow-temperaturecabinetsforconditioningandtestingofrubber,thecompositionandcirculationofheat-transfermedia,andtherequireduniformityandprecisionoftemperaturecontrol.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D746TestMethodforBrittlenessTemperatureofPlasticsandElastomersbyImpactD832PracticeforRubberConditioningForLowTempera-tureTestingD945TestMethodsforRubberPropertiesinCompressionorShear(MechanicalOscillograph)D1053TestMethodsforRubberProperty—StiffeningatLowTemperatures:FlexiblePolymersandCoatedFabricsD1229TestMethodforRubberProperty—CompressionSetatLowTemperaturesD1329TestMethodforEvaluatingRubberProperty—RetractionatLowerTemperatures(TRTest)D1415TestMethodforRubberProperty—InternationalHardnessD2136TestMethodforCo...
