Designation:D2273−08(Reapproved2016)StandardTestMethodforTraceSedimentinLubricatingOils1ThisstandardisissuedunderthefixeddesignationD2273;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationoftraceamounts(lessthan0.05%byvolume)ofsedimentinlubricat-ingoils.Sinceoil-solublematerialprecipitatedbythespecifiedsolventisnotintendedaspartofthemeasuredsediment,thetestmethodisnotapplicableincaseswhereprecipitatedoil-solublecomponentswillappreciablycontributetothesedimentreadings.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4177PracticeforAutomaticSamplingofPetroleumandPetroleumProducts3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1tracesediment,n—thenumberofmillilitresofsedi-mentprecipitatedfrom100mLofoilsample(volumepercent)whenequalpartsoftheoilsampleandthespecifiedsolventaremixedandcentrifugedundertheprescribedconditions.4.SignificanceandUse4.1Thistestmeasuresthetracelevelamountofsedimentthatisnaphtha-insolubleandcanbeseparatedbycentrifuging.Excessiveamountsofsedimentinoilcouldleadtosystemmalfunctionincriticalapplications.5.Apparatus5.1Centrifuge,meetingallthesafetyrequirementsfornormaluseandcapableofwhirlingtwoormorefilledcentrifugetubesataspeedwhichcanbecontrolledtogivearelativecentrifugalforce(rcf)between600and700atthetipofthetubes.Therevo...
