Designation:E2975−15StandardTestMethodforCalibrationofConcentricCylinderRotationalViscometers1ThisstandardisissuedunderthefixeddesignationE2975;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesthecalibration(orperfor-mancevalidation)ofrotationalviscometersinwhichtherotationalelementisimmersedinthetestfluidunderambienttemperatureconditions.Itisnotintendedforcone-and-plateorparallelplateviscometers.1.2CalibrationshallbeperformedwithNewtonianrefer-encematerialsusingexperimentalconditions,suchastemperature,viscosityrangeandshearrate(rotationalspeed),ascloseaspracticaltothosetobeusedformeasurementoftestspecimens.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.1.3.1CommonviscosityunitsofPoise(P)arerelatedtotheSIunitsbytheequivalency1cP=1mPa·s.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E473TerminologyRelatingtoThermalAnalysisandRhe-ologyE1142TerminologyRelatingtoThermophysicalPropertiesE1970PracticeforStatisticalTreatmentofThermoanalyticalData3.Terminology3.1Definitions—SpecifictechnicaltermsusedinthistestmethodaredescribedinTerminologiesE473andE1142includingNewtonian,non-Newtonian,stress,strain,viscometer,viscometry,andviscosity.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1apparentviscosity(η),n—viscositydeterminedbythistestmethod.3.2.1.1Discussion—Becausethevelocitygradientinthistestmethodmaynotbethesameatallpointsoftherotationalelementfornon-Newtonianfl...
