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8 CO220-en-GB_V1.3 07/13
AutomaticBaseline(ABC)Calibration
ABC(AutomaticBaselineCalibration)establishesabaselinecalibrationtoeliminatethezerodrift
oftheinfraredsensor.TheABCfunctionisalwaysONwhenthemeterisON.ABCisdesignedto
calibratethemeterattheminimumCO
2
readingdetectedduring7.5dayscontinuousmonitoring
(withpoweron).ItassumesthattheareabeingtestedreceivesfreshairwithaCO
2
levelof
approximately400ppmatsomeperiodoftimeduringthesevendays.Itisnotsuitabletouse
desktopCO
2
inclosedareaswithconsistentlyhighCO
2
levels24hoursaday.
NOTE:Afterthemeterhasbeenpoweredforoneday,presstheCO
2
buttontodetermineifthe
environmentissuitablefortheautomaticbaselinecalibration.
Maintenance
Cleaningandstorage
1. Themetershouldbecleanedwithadampclothandmilddetergentwhennecessary.Donot
usesolventsorabrasives.
2. Storethemeterinanareawithmoderatetemperatureandhumidity.