Designation:D2129−17StandardTestMethodforColorofClearElectricalInsulatingLiquids(Platinum-CobaltScale)1ThisstandardisissuedunderthefixeddesignationD2129;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisstandarddescribesatestmethodforthevisualdeterminationofthecolorofclearinsulatingliquids.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD1209TestMethodforColorofClearLiquids(Platinum-CobaltScale)D1500TestMethodforASTMColorofPetroleumProducts(ASTMColorScale)3.SummaryofTestMethod3.1Thecolordeterminedbythistestmethodisderivedbycomparingthecolorofthetestspecimenwiththatofaseriesofnumberedcolorreferencestandardsusingtransmittedlightunderprescribedconditions.Theproceduredescribedisbasedonthatformeasuringthecolorofwaterandclearliquidsaccordingtotheplatinum-cobaltscale.Thisscaleissuitableformeasurementsoverthecolorrangefrom5to300.Thecoloroftestspecimensdarkerthan300ontheplatinum-cobaltscalemustbemeasuredaccordingtotheASTMColorScaleasdescribedinTestMethodD1500.Theuseoftheplatinum-cobaltscaleinthiswayisprimarilyofvalueasanexpansionofthelowerpartoftheASTMColorScale,especiallyintherangebetween0and1.4.SignificanceandUse4.1Colorissignificantchieflyasanindicatorofcontami-nationinelectricalinsulatingliquids.Frequentlythiscontami-nationistheresultofsolventactionintheapparatusinvolvedoritmayindicatepossiblecontamination.Nodefiniterelation-shipcanbeestablishedbetweencolorandthephysicalandelectricalchar...
