1、Designation:D821020Standard 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 ViscometerD5293 Test Method for Apparent Viscosity of Engine O
9、ilsand Base Stocks Between 10 C and 35 C UsingCold-Cranking SimulatorD6708 Practice for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a MaterialD8278 Specification for Digital Contact Thermometers forTest Methods Meas
10、uring 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 digital contact thermometer(DCT)
11、,nan electronicdevice consisting of a digital display and associated tempera-ture sensing probe.3.1.1.1 DiscussionThis device consists of a temperaturesensor connected to a measuring instrument;this instrumentmeasures the temperature-dependent quantity of the sensor,computes the temperature from the
12、 measured quantity,and1This 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 Nov.1,2020.Published November 2020.Originallyapproved in 2018.La
13、st previous edition approved in 2019 as D8210 19b.DOI:10.1520/D8210-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM web
14、site.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,PO Box C700,West Conshohocken,PA 19428-2959.United StatesT
15、his 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 the World Trade Organization Technical Barriers to Trade(T
16、BT)Committee.provides a digital output.This digital output goes to a digitaldisplay and/or recording device that may be internal or externalto the device.3.1.1.2 DiscussionThe devices are often referred to as a“digital thermometers,”however the term includes devices thatsense temperature by means other than being in physicalcontact with the media.3.1.1.3 DiscussionPET is an acronym for portable elec-tronic thermometer,a subset of digital contact thermometers(DCT).3.2 Definitions of Terms Specifi
