Designation:D1827–92(Reapproved2002)StandardTestMethodforGasContent(Nonacidic)ofInsulatingLiquidsbyDisplacementwithCarbonDioxide1ThisstandardisissuedunderthefixeddesignationD1827;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesthedeterminationofthegascontentofelectricalinsulatingliquidswithaviscosityof216cStorlessat100°C.Anygasthatisnonreactivewithastrongcausticsolutionmaybedetermined.NOTE1—Thetestmethodhasabiasforsamplescontaininggasesotherthanoxygenandnitrogeninatmosphericratiosduetodifferentialsolubilityeffects.GaseswhichreactwithKOHsuchascarbondioxidewillnotbemeasured.Unsaturatedhydrocarbonssuchasacetylene,ifpresent,willreactwithKOHtoasmalldegreeandwillresultinanunderestimationofthetotalgaspresent.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D831TestMethodforGasContentofCableandCapacitorOils2D923PracticesforSamplingElectricalInsulatingLiquids2D1193SpecificationofReagentWater3D3613PracticeforInsulatingLiquidsforGasAnalysisandDeterminationofWaterContent23.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1gascontentbyvolume—ofaninsulatingliquid,thevolumeofgascontainedinagivenvolumeofliquid.Itisusuallyexpressedasapercentageatstandardatmosphericconditionsof760mmHgpressureand0°Ctemperature.3.1.2gascontentbyweight—theweightofgascontainedinagivenweightofliquid,usuallyexpressedinpartspermillion.4.SummaryofTestMethod4.1Thistestmethodconsistsessentiallyofpurgingdis-solvedgasesfromasmallliquidtestspecimenwithpurecarbondioxidegas.Thedissolvedgasesarethencarriedintoagraduatedburet(precision...
