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4 CO220-en-GB_V1.3 07/13
Operation
POWERINGTHEINSTRUMENT
Power the unit by plugging the AC adaptor into the meter and
intoanACsource.Themeterwill switchONwi thashortbeep.
Pleaseuseanapprop riatepowersource:100to240VAC(50‐60Hz) .
The AC adaptor’s outpu t voltage is 7.5 to 9.0V and its output
currentis0.5A.
Use of3
rd
partyACadaptorcandamagethemeter.
TheLCDwilldisplaythecurrentCO
2
concentra ti on
,airtemperature,
relativehumidity,date,andtime(dateandtimetoggleevery10
seconds).Sixfacialiconsindicate theindoorairqualityleveland
appearonthetop‐tierdisplayarea(seefigureatrightandth e
sectiontitledDisplaySymbolsearlierinthis guideforadditional
details).
CO
2
MEASUREMENTCONSIDERATIONS
ThemeterstartsmeasuringwhenpoweredONandupdatesreadingsevery6seconds.
Responsetimeis10secondsforCO
2
and2secondsforRelativeHumidity.
Iftheenvironmentalconditionschange(forexample,alowtohightemperatureswing)please
allow30secondsforCO
2
readingsand30minutesforRelativeHumidityreadingstostabilize.
NOTE:DonotholdthemeterclosetothemouthoranyothersourceofCO
2
.
CHANGETHETEMPERATUREUNITS(
o
C/
o
F)
Thechangethedisplayedtemperatureunitsofmeasure:
1. PressandholdtheSETbutton
2. WhileholdingtheSET button,pressthe
o
C/
o
Fbutton
3. Repeatthesestepstochangetheunitsagain