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2 CO220-en-GB_V1.3 07/13
Introduction
CongratulationsonyourpurchaseoftheModelCO220CarbonDioxideMeter.Thismeter
measuresCO
2
concentration,airtemperature,andrelativehumidity.TheCO200includesa99
MemoryDataloggerforstoringandretrievingreadingswithdateandtimestamping.
Theaudiblealarmsmakethisisanidealinstrumentforindoorairquality(IAQ)diagnostics.
Carbondioxide(CO
2
)isagaseouscomponentoftheearth’satmosphere.Theconcentrationof
CO
2
innaturalambientairisapproximately0.04%or400ppm.
Thismeterisshippedfullytestedandcalibratedand,withproperuse,willprovideyearsof
reliableservice.Pleasevisitourwebsite(www.extech.com)tocheckforthelatestversionofthis
UserGuide,ProductUpdates,andCustomerSupport.
FEATURES
ExtraLargeLCDsimultaneouslydisplaysCO
2
Level,AirTemperature,&RelativeHumidity
DisplayedCalendarClock.
Six(6)iconsindicateindoorairqualitylevels(350/450/700/1000/1250/5000ppm)
StableNDIRsensorforCO
2
detection
AutomaticBaselineCalibration(ABC)function
AudiblehighCO
2
concentrationalarmwithse lectablehighalarmthreshold
DewPointandWetBulbtemperaturemeasurements
Descriptions
METER
1. CO
2
reading
2. RelativeHumidityReading
3. AirTemperatureReading
4. Time/DateDisplay
5. SETbutton
6. ESC–MEMbutton
7. SELECT–RECALLbutton
8. C/F‐%RHbutton
9. CO
2
button
10. ACadaptorjack
NOTE:CO
2
,TemperatureandRHsensorsonrearofinstrument