Designation:D5931−13StandardTestMethodforDensityandRelativeDensityofEngineCoolantConcentratesandAqueousEngineCoolantsbyDigitalDensityMeter1ThisstandardisissuedunderthefixeddesignationD5931;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofthedensityorrelativedensityofenginecoolantconcentratesandaqueousenginecoolants.1.2Thistestmethodshouldnotbeappliedtosamplessodarkincolorthattheabsenceofairbubblesinthesamplecellcannotbeestablishedwithcertainty.1.3Theacceptedunitsofmeasurefordensityaregramspermilliliterorkilogramspercubicmeter.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeNote1.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD4052TestMethodforDensity,RelativeDensity,andAPIGravityofLiquidsbyDigitalDensityMeterE230SpecificationandTemperature-ElectromotiveForce(EMF)TablesforStandardizedThermocouples3.Terminology3.1Definitions:3.1.1relativedensity,n—theratioofthedensityofamaterialatastatedtemperaturetothedensityofwateratthesamestatedtemperature.4.SummaryofTestMethod4.1Asmallvolumeofliquidsampleisintroducedintoanoscillatingsampletube,andthechangeinoscillatingfrequencycausedbythechangeinthemassofthetubeisusedinconjunctionwithcalibrationdatatodeterminethedensityofthesample.5.SignificanceandUse5.1Densityisafundamentalphysicalpropertythatcanbeusedinconjunctionwithotherpropertiestocharacterizeenginecoolantconcentratesandaqueousenginecoolants.5.2Determinationofthedensityorrelativedensityoftheseproductsisnecessaryfortheconversionofmeasuredvolumestovolumesatthestandardtemperat...
