Designation:D7110−15StandardTestMethodforDeterminingtheViscosity-TemperatureRelationshipofUsedandSoot-ContainingEngineOilsatLowTemperatures1ThisstandardisissuedunderthefixeddesignationD7110;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcovershowtomeasuretheapparentviscosityofusedandsoot-containingengineoilsatlowtemperatures.1.2Ashearrateofapproximately0.2s-1isproducedatshearstressesbelow200Pa.Apparentviscosityismeasuredcontinuouslyasthesampleiscooledatarateof3°Cperhourovertherangeof−5°Cto−40°C.1.3Themeasurementsresultingfromthistestmethodareviscosity,themaximumrateofviscosityincrease(GelationIndex)andthetemperatureatwhichtheGelationIndexoccurs.1.4Applicabilitytopetroleumproductsotherthanengineoilshasnotbeendeterminedinpreparingthistestmethod.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D341PracticeforViscosity-TemperatureChartsforLiquidPetroleumProductsD3829TestMethodforPredictingtheBorderlinePumpingTemperatureofEngineOilD4684TestMethodforDeterminationofYieldStressandApparentViscosityofEngineOilsatLowTemperatureD4057PracticeforManualSamplingofPetroleumandPetroleumProducts3.Terminology3.1Definitions:3.1.1apparentviscosity,n—theviscosityobtainedbyuseofthistestmethod.3.1.1.1Discussion—See3.1.7fordefinitionofviscosityandunits.3.1.2digitalcontactthermometer(DCT),n—anelectronicdeviceconsistingofadigitaldisplayandassociatedtempera-turesensingprobe.3.1.2.1Discussion—Thisdeviceconsistsofatemperatu...
