Designation:D7619−22StandardTestMethodforSizingandCountingParticlesinLightandMiddleDistillateFuels,byAutomaticParticleCounter1,2ThisstandardisissuedunderthefixeddesignationD7619;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodusesaspecificautomaticparticlecounter2(APC)tocountandmeasurethesizeofdisperseddirtparticles,waterdropletsandotherparticles,inlightandmiddledistillatefuel,andbiofuelssuchasbiodieselandbiodieselblends,intheoverallrangefrom4µm(c)to100µm(c)andinthesizebands≥4µm(c),≥6µm(c),and≥14µm(c).NOTE1—ASTMandmilitaryspecificationfuelsfallingwithinthescopeofthistestmethodincludeSpecifications:D975grades1Dand2D,D1655,D3699,D4814(see14.1.1.1),D6751,D7467,distillategradesofD396andD2880,MIL-DTL-83133,andMIL-DTL-16884.NOTE2—Forthepurposesofthistestmethod,waterdropletsarecountedasparticles,andagglomeratedparticlesaredetectedandcountedasasinglelargerparticle.Dirtincludesbiologicalparticles.Althoughtheprojectedareaofaparticleismeasured,thisisexpressedasthediameterofasphereforthepurposesofthistestmethod.NOTE3—Thenotation(c),usedwithparticlesizes,isusedtodenotethattheapparatushasbeencalibratedinaccordancewithISO11171.Strictlythisonlyappliestoparticlesupto50µm.NOTE4—Thistestmethodmaybeusedforparticlesizesbandsupto100µm(c),howevertheprecisionhasonlybeendeterminedforthesizebands≥4µm(c),≥6µm(c),and≥14µm(c).Allmeasurementsarepermillilitre.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheappli...
