Designation:D1810–94StandardTestMethodforSpecificGravityofAskarels1ThisstandardisissuedunderthefixeddesignationD1810;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesthemeasurementofthespecificgravity(relativedensity)ofaskarels.Askarelsareliquidscontainingchlorinatedaromatichydrocarbonsusedaselectricalinsulationandcoolantintransformersandcapacitors.Thistestmethodappliestothoseaskarelsremaininginservicewhichcontainpolychlorinatedbiphenyls(PCB’s).Thetestmethodmayalsobeappliedtounusedorin-servicenon-PCBaskarels,whichhavebeenintroducedasreplacementsintheseapplications.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D923TestMethodforSamplingElectricalInsulatingLiquids2E1SpecificationforASTMThermometers33.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1specificgravity(relativedensity)ofanaskarel—theratioofthemassesofequalvolumeofaskarelandwater.Foraskarelsoflowviscosity,bothmassesaredeterminedwiththeliquidatatemperatureof60°F(15.56°C),andbothweightsarecorrectedforthebuoyanteffectofair.Thischaracteristicisexpressedas“SpecificGravity60/60°F”whereinthefirst60°Freferstothetemperatureoftheaskarelandthesecond60°Freferstothetemperatureofthewater.Foraskarelsofhighviscosity,whichcannotbetestedat60°F,thestandardtesttemperatureis194°F(90°C)andthespecificgravityisre-cordedas194/60°F.4.SignificanceandUse4.1Low-viscosityaskarelsarefrequentlysoldonthebasisofvolumedeliveredat60°F.Deliveryisoftenmadeonthebasisofnewweightofproductindr...
