ASTM_D_4683_-_20.pdf

Designation:D468320Standard Test Method forMeasuring Viscosity of New and Used Engine Oils at HighShear Rate and High Temperature by Tapered BearingSimulator Viscometer at 150 C1This standard is issued under the fixed designation D4683;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the laboratory determination ofthe viscosity of engine oils at 150 C and 1.0106s1using aviscometer having a slightly tapered rotor and stator called theTapered Bearing Simulator(TBS)Viscometer.21.2 The Newtonian calibration oils used to establish this testmethod range from approximately 1.2 mPas to 7.7 mPas at150 C.The precision has only been determined for theviscosity range 1.47 mPas to 5.09 mPas at 150 C for thematerials listed in the precision section.1.3 The non-Newtonian reference oil used to establish theshear rate of 1.0106s1for this test method has a viscosityclosely held to 3.55 mPas at 150 C by using the absoluteviscometry of the TBS.1.4 Manual,semi-automated,and fully automated TBSviscometers were used in developing the precision statementfor this test method.1.5 Application to petroleum products such as base oils andformulated engine oils was determined in preparing the visco-metric information for this test method.1.6 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6.1 This test method uses the milliPascalsecond(mPas)as the unit of viscosity.This unit is equivalent to the centipoise(cP).1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D4741 Test Method for Measuring Viscosity at High Tem-perature and High Shear Rate by Tapered-Plug ViscometerD5481 Test Method for Measuring Apparent Viscosity atHigh-Temperature and High-Shear Rate by Multicell Cap-illary ViscometerD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products,Liquid Fuels,and LubricantsD6708 Practice for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a Material2.2 Coordinating European Council(CEC)Standard:4,5CEC L-36-90The Measurement of Lubricant DynamicViscosity under Conditions of High Shear2.3 Energy Institute Standard:6,5IP 370 Test Method for the Measurement of LubricantDynamic Viscosity Under Conditions of High Shear Using1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.07 on Flow Properties.Current edition approved June 1,2020.Published June 2020.Originallyapproved in 1987.Last previous edition approved in 2017 as D4683 17.DOI:10.1520/D4683-20.2The sole source of supply of the apparatus known to the committee at this timeis Tannas Co.,4800 James Savage Rd.,Midland,MI 48642.If you are aware ofalternative suppliers,please provide this information to ASTM InternationalHeadquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you may attend.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from Coordinating European Council(CEC),Services provided byKellen Europe,Avenue Jules Bordet 142-1140,Brussels,Belgium,http:/www.cectests.org.5This test method is technically identical to that described in CEC L-36(underthe jurisdiction of the CEC Engine Lubricants Technical Committee)and IP 370references CEC L-036.6Available from Energy Institute,61 New Cavendish St.,London,W1G 7AR,U.K.,http:/www.energyinst.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles f