ASTM_D_7279_-_14a.pdf

Designation:D727914aStandard Test Method forKinematic Viscosity of Transparent and Opaque Liquids byAutomated Houillon Viscometer1This standard is issued under the fixed designation D7279;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.1.Scope*1.1 This test method covers the measurement of the kine-matic viscosity of transparent and opaque liquids;such as baseoils,formulated oils,diesel oil,biodiesel,biodiesel blends,andused lubricating oils using a Houillon viscometer in automatedmode.1.2 The range of kinematic viscosity capable of beingmeasured by this test method is from 2 mm2/s to 1500 mm2/s(see Fig.1).The range is dependent on the tube constantutilized.The temperature range that the apparatus is capable ofachieving is between 20 C and 150 C,inclusive.However,the precision has only been determined for the viscosity range;2 mm2/s to 478 mm2/s at 40 C for base oils,formulated oils,diesel oil,biodiesel,and biodiesel blends;3 mm2/s to106 mm2/s at 100 C for base oils and formulated oils;25 mm2/s to 150 mm2/s at 40 C and 5 mm2/s to 16 mm2/s at100 C for used lubricating oils.As indicated for the materialslisted in the precision section.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For specificwarning statements,see Section 6.2.Referenced Documents2.1 ASTM Standards:2D445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D2162 Practice for Basic Calibration of Master Viscometersand Viscosity Oil StandardsD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6708 Practice for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a MaterialD6792 Practice for Quality System in Petroleum Productsand Lubricants Testing LaboratoriesE1137 Specification for Industrial Platinum Resistance Ther-mometers2.2 ISO Standards:ISO 5725 Accuracy(Trueness and Precision)of Measure-ment Methods and Results3ISO/EC 17025 General Requirements for the Competence ofTesting and Calibration Laboratories32.3 NIST Standard:NIST Technical Note 1297 Guideline for Evaluating andExpressing the Uncertainty of NIST Measurement Re-sults43.Summary of Test Method3.1 The kinematic viscosity is determined by measuring thetime taken for a sample to fill a calibrated volume at a giventemperature.The specimen is introduced into the apparatus andthen flows into the viscometer tube which is equipped with twodetection cells.The specimen reaches the test temperature ofthe viscometer bath and when the leading edge of the specimenpasses in front of the first detection cell,the automatedinstrument starts the timing sequence.When the leading edgeof the specimen passes in front of the second detection cell,the1This 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 Oct.1,2014.Published November 2014.Originallyapproved in 2006.Last previous edition approved in 2014 as D7279 14.DOI:10.1520/D7279-14A.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 website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from National Institute of Standards and Technology(NIST),100Bureau Dr.,Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.*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 States1 instrument stops timing the flow.The time interval thusmeasured allows the calculation of the kinematic viscosityusing a viscometer tube constant determined earlier by calibra-tion with certified viscosity reference standards.3.2 The kinematic viscosity is calculated using the formula:5 C 3t(1)where:=the kinematic viscosity in mm2/s,C=the viscometer tube constant in mm2/s,andt=the flow time in s measured during th