DS2422 Trim Procedure and Software Correction

Abstract:Beforeitcanaccuratelymeasuretemperatures,theDS2422needstoundergoatwo-pointtrim.Forthehighestlevelofaccuracy,thistrimneedstotakeplaceaslateaspossible,i.e.,withtheendproductthattheDS2422residesin.TheaccuracycanbefurtherimprovedthroughsoftwarecorrectionifactualvaluesandtemperaturereadingsoftheDS2422atadditionaltemperaturepointsarestoredinthecalibrationmemory.Thisapplicationnotedescribeshowtoperformthetrim,howtoobtain,formatandstorethedataforthesoftwarecorrectionandhowtoperformthesoftwarecorrection.Aspreadsheetwithcalculationsandformatconversionsusedinthisapplicationnotecanbedownloadedfromwww.ibutton.com.DS2422TrimProcedureandSoftwareCorrectionBy:BernhardLinke,PrincipalMemberTechnicalStaffDec08,2003Abstract:Beforeitcanaccuratelymeasuretemperatures,theDS2422needstoundergoatwo-pointtrim.Forthehighestlevelofaccuracy,thistrimneedstotakeplaceaslateaspossible,i.e.,withtheendproductthattheDS2422residesin.TheaccuracycanbefurtherimprovedthroughsoftwarecorrectionifactualvaluesandtemperaturereadingsoftheDS2422atadditionaltemperaturepointsarestoredinthecalibrationmemory.Thisapplicationnotedescribeshowtoperformthetrim,howtoobtain,formatandstorethedataforthesoftwarecorrectionandhowtoperformthesoftwarecorrection.Aspreadsheetwithcalculationsandformatconversionsusedinthisapplicationno