Designation:D5280−96(Reapproved2013)StandardPracticeforEvaluationofPerformanceCharacteristicsofAirQualityMeasurementMethodswithLinearCalibrationFunctions1ThisstandardisissuedunderthefixeddesignationD5280;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispractice2coversproceduresforevaluatingthefollowingperformancecharacteristicsofairqualitymeasure-mentmethods:bias(inpartonly),calibrationfunctionandlinearity,instability,lowerdetectionlimit,periodofunattendedoperation,selectivity,sensitivity,andupperlimitofmeasure-ment.1.2Theprocedurespresentedinthispracticeareapplicableonlytoairqualitymeasurementmethodswithlinearcontinu-ouscalibrationfunctions,andtheoutputvariableofwhichisadefinedtimeaverage.Thelinearitymaybeduetopostprocess-ingoftheprimaryoutputvariable.Additionally,replicatevaluesbelongingtothesameinputstateareassumedtobenormallydistributed.Componentsrequiredtotransformtheprimarymeasurementmethodoutputintothetimeaveragesdesiredareregardedasanintegralpartofthismeasurementmethod.1.3Forsurveillanceofmeasurementmethodstabilityunderroutinemeasurementconditions,itmaysufficetochecktheessentialperformancecharacteristicsusingsimplifiedtests,thedegreeofsimplificationacceptablebeingdependentontheknowledgeontheinvariancepropertiesoftheperformancecharacteristicspreviouslygainedbytheprocedurespresentedhere.1.4Thereisnofundamentaldifferencebetweentheinstru-mental(automatic)andthemanual(forexample,wet-chemical)procedures,aslongasthemeasuredvalueisanaveragerepresentativeforapredefinedtimeinterval.Therefore,theprocedurespresentedareapplicabletoboth.Furthermore,theyareapplicabletomeasurementmethodsforambient,workplace,andindooratmospheres,aswellasemissions.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilit...
