Designation:E2214−12´1StandardPracticeforSpecifyingandVerifyingthePerformanceofColor-MeasuringInstruments1ThisstandardisissuedunderthefixeddesignationE2214;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—ReferencetoFig.1andFig.2andcorrectionsinthetableinA1.3.1weremadeeditoriallyinSeptember2013.INTRODUCTIONRecentadvancesinoptics,electronicsanddocumentarystandardhaveresultedinaproliferationofinstrumentsforthemeasurementofcolorandappearanceofmaterialsandobjects.Theseinstrumentspossessverygoodperformancebuttherehasbeenlittleprogresstowardstandardizingtheterminologyandprocedurestoquantifythatperformance.Therefore,thecommercialliteratureandevensomedocumentarystandardsareamassofconfusingterms,numbersandspecificationsthatareimpossibletocompareorinterpret.Tworecentpapersintheliterature,haveproposedtermsandprocedurestostandardizethespecification,comparisonandverificationofthelevelofperformanceofacolor-measuringinstrument.2,3Followingthoseprocedures,thosespecificationscanbecomparedtoproducttolerances.Thisbecomesimportantsothatinstrumentusersandinstrumentmakerscanagreeonhowtocompareorverify,orboth,thattheirinstrumentsareperforminginthefieldastheyweredesignedandtestedinthefactory.1.Scope1.1Thispracticeprovidesstandardtermsandproceduresfordescribingandcharacterizingtheperformanceofspectralandfilterbasedinstrumentsdesignedtomeasureandcomputethecolorimetricpropertiesofmaterialsandobjects.Itdoesnotsetthespecificationsbutrathergivestheformatandprocessbywhichspecificationscanbedetermined,communicatedandverified.1.2Thispracticedoesnotdescribemethodsthataregener-allyapplicabletovisible-rangespectroscopicinstrumentsusedforanalyticalchemistry(UV-VISspectrophotometers).ASTMCommitteeE13onMolecularSpectroscopyandChromatog-raphyincludessuchproceduresinstandardsundertheirjur...
