1、Designation:D821022Standard Test Method forAutomatic Determination of Low-Temperature Viscosity ofAutomatic Transmission Fluids,Hydraulic Fluids,andLubricants Using a Rotational Viscometer1This standard is issued under the fixed designation D8210;the number immediately following the designation indi
2、cates 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.1.Scope*1.1 This test method automates the determination of
3、lowtemperature,low-shear-rate viscosity of driveline and hydrau-lic fluids,such as automatic transmission fluids,gear oils,hydraulic fluids,and other lubricants.It utilizes a thermoelec-trically temperature-controlled sample chamber along with aprogrammable rotational viscometer.This test method cov
4、ers aviscosity range of 300 mPas to 900 000 mPas measured attemperatures from 40 C to 10 C.1.2 The precision data were determined at 40 C and26 C for a viscosity range of 6380 mPas to 255 840 mPas.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are inclu
5、ded in thisstandard except those noted below.1.3.1 ExceptionThe test method uses the SI unit,milliPascal-second(mPas),as the unit of viscosity.(1 cP=1 mPas).1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of t
6、his standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Deci
7、sion 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:2D341 Practice for Viscosity-Temperature Equations andCharts for Liquid Petroleum or H
8、ydrocarbon ProductsD2162 Practice for Basic Calibration of Master Viscometersand Viscosity Oil StandardsD2983 Test Method for Low-Temperature Viscosity of Au-tomatic Transmission Fluids,Hydraulic Fluids,and Lubri-cants using a Rotational ViscometerD4175 Terminology Relating to Petroleum Products,Liq
9、uidFuels,and LubricantsD5133 Test Method for Low Temperature,Low Shear Rate,Viscosity/Temperature Dependence of Lubricating OilsUsing a Temperature-Scanning TechniqueD5293 Test Method for Apparent Viscosity of Engine Oilsand Base Stocks Between 10 C and 35 C UsingCold-Cranking SimulatorD6708 Practic
10、e for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a MaterialD6821 Test Method for Low Temperature Viscosity of DriveLine Lubricants in a Constant Shear Stress ViscometerD8278 Specification for Digital Contact Thermo
11、meters forTest Methods Measuring Flow Properties of Fuels andLubricants2.2 ISO Standard:3ISO/IEC 17025 General requirements for the competence oftesting and calibration laboratoriesISO 17034 General requirement for the competence ofreference material producers3.Terminology3.1 Definitions:3.1.1 appar
12、ent viscosity,nthe determined viscosity ob-tained by use of this test method.D41751This 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 July
13、 1,2022.Published August 2022.Originallyapproved in 2018.Last previous edition approved in 2020 as D8210 20.DOI:10.1520/D8210-22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,r
14、efer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,
15、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 for theDevelopment of International Standards,Guides and Recommendations issued by
16、the World Trade Organization Technical Barriers to Trade(TBT)Committee.13.1.1.1 DiscussionIn all cases the term“viscosity”impliesthat the value is the“apparent viscosity.”3.1.1.2 DiscussionApparent viscosity may vary with thespindle speed(shear rate)of a rotational viscometer when thefluid is non-Newtonian.3.1.2 digital contact thermometer(DCT),nan electronicdevice consisting of a digital display and associated tempera-ture sensing probe.D41753.1.2.1 DiscussionThis device consists of a temperatu
