Designation:D7919−14StandardGuideforFilterDebrisAnalysis(FDA)UsingManualorAutomatedProcesses1ThisstandardisissuedunderthefixeddesignationD7919;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONTypically,mainlubricationsystemsincorporatein-systemfilterstomaintainanappropriatelubricantcleanlinesslevelduringoperation.Sincethelubricationfilterelementremovesandretainsamajorportionofthesolidcontaminationinthelubricationsystem,evaluationofthedebriscapturedwithinthefilterelementaidsinthedeterminationofmachineconditionandrootcauseanalysis(RCA).Thepastdecadehasseenmorewidespreaduseoffilterdebrisanalysis(FDA)asacondition-monitoringtooltodetectandanalyzeabnormalcontaminantingressionintothelubesystemandpredictlubesystemcomponentwear.Thisisinpartduetotheincreaseduseoffinerfiltrationinmachinerywhichresultsinadecreaseofweardebrisavailablefordetectionbytraditionalsampledoilanalysis.TheU.S.militaryandothermilitariesaroundtheworldaswellasOriginalEquipmentManufacturershaveadoptedFDAtechniques.Commercialin-serviceoillaboratoriesarealsoutilizingawiderangeofFDAtechniques,frommanualtoautomated.Itisnecessarytoprovideaguidetoimproveanalysisandcomparisonofdata.1.Scope1.1Thisguidepertainstoremovalandanalysistechniquestoextractdebriscapturedbyin-servicelubricantandhydraulicfiltersandtoanalyzethedebrisremoved.1.2Thisguidesuggeststechniquestoremove,collectandanalyzedebrisfromfiltersinsupportofmachineryhealthconditionmonitoring.1.3Debrisremovaltechniquesrangefrommanualtoauto-mated.1.4Analysistechniquesvaryfromvisual,particlecounting,microscopic,x-rayfluorescence(XRF),atomicemissionspec-troscopy(AES),andscanningelectronmicroscopyenergydispersivex-rays(SEMEDX).1.5Thisguideissuitableforusewiththefollowingfiltertypes:screwon,metalmesh,andremovablediagnosticlayerfilters.1.6Thisstanda...
