Designation:D7684−11StandardGuideforMicroscopicCharacterizationofParticlesfromIn-ServiceLubricants1ThisstandardisissuedunderthefixeddesignationD7684;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidecoverstheclassificationandreportingofresultsfromin-servicelubricantparticulatedebrisanalysisobtainedbymicroscopicinspectionofwearandcontaminantparticlesextractedfromin-servicelubricantandhydraulicoilsamples.Thisguidesuggestsstandardizedterminologytopromoteconsistentreporting,provideslogicalframeworktodocumentlikelyorpossiblerootcauses,andsupportsinferenceassociatedmachineryhealthconditionorseveritybasedonavailabledebrisanalysisinformation.1.2Thisguideshallbeusedinconjunctionwithanappro-priateweardebrisanalysissamplepreparationandinspectiontechniqueincluding,butnotlimitedto,oneofthefollowing:1.2.1Ferrographyusinglinearglassslides,1.2.2Ferrographyusingrotaryglassslides,1.2.3Patchanalysisusingpatchmakers(filtrationthroughmembranefilters),1.2.4Filterdebrisanalysis,1.2.5Magneticpluginspection,or1.2.6Othermeansusedtoextractandinspectparticulatedebrisfromin-servicelubricants.1.3Thisstandardisnotintendedtoevaluateorcharacterizetheadvantageordisadvantageofoneoranotheroftheseparticularparticleextractionandinspectionmethods.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4130TestMethodforSulfateIoninBrackishWater,Seawater,andBrinesD4175TerminologyRelatingtoPetroleum,PetroleumProducts,andLubricantsD7416PracticeforAnalysisofIn...
