ASTM_D_7686_-_19.pdf

Designation:D768619Standard Test Method forField-Based Condition Monitoring of Soot in In-ServiceLubricants Using a Fixed-Filter Infrared(IR)Instrument1This standard is issued under the fixed designation D7686;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 pertains to field-based monitoring ofsoot in diesel crankcase engine oils as well as in other types ofengine oils where soot may contaminate the lubricant as aresult of a blow-by due to incomplete combustion of fuels.It isapplicable to oils having soot levels of up to 12%by mass.1.2 This test method uses filter-based infrared technologyfor monitoring of soot build-up in in-service petroleum andhydrocarbon-based lubricants as a result of normal machineryoperation.Soot levels in engine oils rise as soot particlescontaminate the oil as a result of exhaust gas recirculation fromblow-by.This test method is designed as a fast,simple,andfield-capable spectroscopic check for soot in in-servicehydrocarbon-based lubricants with the objective of helpingdiagnose the operational condition of the machine based onmeasuring the level of soot in the oil.1.3 This test method is intended as a field test only,andshould be treated as such.Critical applications should uselaboratory based methods,such as Thermal GravimetricAnaly-sis(TGA)described in Test Method D5967,Annex A4.1.4 Acquisition of spectral data for measuring soot inin-service oil and lubricant samples with the use of a fixed-filter IR instrument is described in this test method.Calibrationagainst prepared soot standards is also described.NOTE1It is not the intent of this test method to establish orrecommend normal,cautionary,warning,or alert limits for any machinery.Such limits should be established in conjunction with advice and guidancefrom the machinery manufacturer and maintenance group.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 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.1.7 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:2D5967 Test Method for Evaluation of Diesel Engine Oils inT-8 Diesel EngineD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD7418 Practice for Set-Up and Operation of Fourier Trans-form Infrared(FT-IR)Spectrometers for In-Service OilCondition MonitoringE131 Terminology Relating to Molecular SpectroscopyE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE2412 Practice for Condition Monitoring of In-Service Lu-bricants by Trend Analysis Using Fourier TransformInfrared(FT-IR)Spectrometry3.Terminology3.1 DefinitionsFor definitions of terms relating to infraredspectroscopy used in this test method,refer to TerminologyE131.3.2 DefinitionsFor definition of terms related to in-serviceoil condition monitoring,refer to Practice D7418.4.Summary of Test Method4.1 This test method uses filter-based infrared spectrometryto monitor levels of soot in in-service petroleum and1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.96.03 on FTIR Testing Practices and Techniques Related toIn-Service Lubricants.Current edition approved July 15,2019.Published September 2019.Originallyapproved in 2011.Last previous edition approved in 2011 as D7686 11.DOI:10.1520/D7686-19.2For 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.*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 for theDevelopment of International Standards,Guides and Recommendations i