Extech Instruments CO220 User manual

USERGUIDE
CO2MonitorandDatalogger
ModelCO220
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

2 CO220-EU-EN V1.3 07/13
Introduction
CongratulationsonyourpurchaseoftheModelCO220CarbonDioxideMeter.Thismeter
measuresCO2concentration,airtemperature,andrelativehumidity.TheCO200includesa99
MemoryDataloggerforstoringandretrievingreadingswithdateandtimestamping.
Theaudiblealarmsmakethisisanidealinstrumentforindoorairquality(IAQ)diagnostics.
Carbondioxide(CO2)isagaseouscomponentoftheearth’satmosphere.Theconcentrationof
CO2innaturalambientairisapproximately0.04%or400ppm.
Thismeterisshippedfullytestedandcalibratedand,withproperuse,willprovideyearsof
reliableservice.Pleasevisitourwebsite tocheckforthelatestversionofthisUserGuide,
ProductUpdates,andCustomerSupport.
FEATURES
ExtraLargeLCDsimultaneouslydisplaysCO2Level,AirTemperature,&RelativeHumidity
DisplayedCalendarClock.
Six(6)iconsindicateindoorairqualitylevels(350/450/700/1000/1250/5000ppm)
StableNDIRsensorforCO2detection
AutomaticBaselineCalibration(ABC)function
AudiblehighCO2concentrationalarmwithselectablehighalarmthreshold
DewPointandWetBulbtemperaturemeasurements
Descriptions
METER
1. CO2reading
2. RelativeHumidityReading
3. AirTemperatureReading
4. Time/DateDisplay
5. SETbutton
6. ESC–MEMbutton
7. SELECT–RECALLbutton
8. C/F‐%RHbutton
9. CO2button
10. ACadaptorjack
NOTE:CO2,TemperatureandRHsensorsonrearofinstrument

3 CO220-EU-EN V1.3 07/13
DISPLAYSYMBOLDESCRIPTIONS
ppmCO2concentrationunitofmeasure
350ppmto450ppm
450ppmto700ppm
700ppmto1000ppm
1000ppmto2500ppm
2500ppmto5000ppm
5000ppmandabove
AirTempAirTemperature
TWATimeWeightedAverage(8hrs)
STELShort‐TermExposureLimit(15minuteweightedaverage)
IPS%Literspersecondperperson
cfm/pCubicfeetperminuteperperson
WBWetBulbtemperature
DPDewPointtemperature
MAX/MINMaximumorMinimumreading


PUSH‐BUTTONDESCRIPTION
SETEntersetupmode
Saveandconfirmsettings
ESC‐MEMExitsetupandprogrammingpages
Endacalibrationsession
MemoryDatalogger(99points)
SELECT/RECALLSelect/RecallandClearDataloggerMemoryReadings
oC/oF‐%RHTemperature/RelativeHumidityModes/TemperatureUnitchanging
CO2CO2modepagestepping


4 CO220-EU-EN V1.3 07/13
Operation
POWERINGTHEINSTRUMENT
PowertheunitbypluggingtheACadaptorintothemeterand
intoanACsource.ThemeterwillswitchONwithashortbeep.
Pleaseuseanappropriatepowersource:100to240VAC(50‐60Hz).
TheACadaptor’soutputvoltageis7.5to9.0Vanditsoutput
currentis0.5A.Useof3rdpartyACadaptorcandamagethemeter.
TheLCDwilldisplaythecurrentCO2
concentration ,airtemperature,
relativehumidity,date,andtime(dateandtimetoggleevery10
seconds).Sixfacialiconsindicatetheindoorairqualityleveland
appearonthetop‐tierdisplayarea(seefigureatrightandthe
sectiontitledDisplaySymbolsearlierinthisguideforadditional
details).
CO2MEASUREMENTCONSIDERATIONS
ThemeterstartsmeasuringwhenpoweredONandupdatesreadingsevery6seconds.
Responsetimeis10secondsforCO2and2secondsforRelativeHumidity.
Iftheenvironmentalconditionschange(forexample,alowtohightemperatureswing)please
allow30secondsforCO2readingsand30minutesforRelativeHumidityreadingstostabilize.
NOTE:DonotholdthemeterclosetothemouthoranyothersourceofCO2.
CHANGETHETEMPERATUREUNITS(oC/oF)
Thechangethedisplayedtemperatureunitsofmeasure:
1. PressandholdtheSETbutton
2. WhileholdingtheSETbutton,presstheoC/oFbutton
3. Repeatthesestepstochangetheunitsagain


5 CO220-EU-EN V1.3 07/13
CO2DISPLAYPAGES
PresstheCO2buttontochangetheCO2displaypageonthetop‐tierLCDarea.Thepagesare
shownbelowforCO2,Max‐Min,TWA,STEL,IPS%andcfm/p.
TIMEWEIGHTEDAVERAGE(TWA)
TWAisTimeWeightedAverage(8hours);themeterupdatesthereadingevery60seconds.If
themeterhasbeenpoweredonforlessthan8hours,theTWAvaluewillbetheweighted
averageofreadingstakensincetheunitwaspoweredON.
SHORT‐TERMEXPOSURELIMIT(STEL)
STEListheShort‐TermExposureLimit(15minutesweightedaverage);themeterupdates
readingsevery60seconds.Ifthemeterhasbeenpoweredonforlessthan15minutes,theSTEL
valueshowstheweightedaverageofreadingtakensincetheunitwaspoweredON.
LPS%
LPS%representsLiterspersecondperperson.
CFM/P
CFM/PrepresentsCubicFeetperMinuteperperson.

6 CO220-EU-EN V1.3 07/13
VENT.R(CO2‐baseddemand‐controlledventilation)
CO2‐baseddemand‐controlledventilationreferstothepracticeofusingcarbondioxide
concentrationsasanindicatorforaper‐personventilationrate.Inthiscontext,CO2ismonitored
asabyproductofrespirationratherthanasanindoorcontaminant.Therateatwhichpeople
produceCO2varieswithdietandhealth,aswellaswiththedurationandintensityofphysical
activity.Themoreexertionanactivityentails,themorecarbondioxideisproduced.
CHANGINGTHE2NDTIERDISPLAYCOMBINATION
RepeatedpressesoftheC/F‐RH%buttonstepthroughthefollowingcombinationsof
parameters:
Humidity+AirTemperature
Humidity+WebBulbTemperature
Humidity+DewPointTemperature
MAX/MINMEMORY
ThemeterautomaticallyrecordsMaximumandMinimumreadingswhenthemeterisswitched
ON.Inthenormalmode,presstheCO2buttontoseethemaximumandminimumlevelsofCO2.
WhileviewingtheMaxorMinreading,pressandholdtheSELECT/RECALLbuttontoresetthe
MAXorMINmemory.The“Clr”iconwillappearfor2secondsandthedisplaywillbegintracking
newMAXandMINreadings.
DATALOGGERMEMORY99READINGS
Theusercanstoreupto99CO2readingsinmemoryforlaterrecall.
PresstheESC‐MEMbuttonmomentarilytosavethecurrentCO2
readingwithdate/timestamp.Themeterwillemitashortbeepand
thememorylocationnumberwillreplacetheRHreadingfor2
secondsbeforereturningtotheRHreading.
Oncethememoryisfull,themeterwilloverwritethefirstdatapoint
storedandcontinuetooverwriteexistingreadingsasnewreadings
arestored.
TorecallthedatausetheSELECT/RECALLbutton.Themiddletierdisplaywillshowthe
memorylocationnumberandthetoptierdisplaywillshowthestoredreadinginppm.The
bottomtierdisplayshowsthedate/timestampforthedisplayedreading.
PresstheoC/oF‐RH%buttonmomentarilytoreturntothenormaloperatingmode.
PressandholdtheSELECT/RECALLbuttontoresetthe99pointmemorybank,the“Clr”iconwill
appearfor2secondsbeforereturningtothenormaldisplaymode.
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7 CO220-EU-EN V1.3 07/13
SetupMode 
PressandholdtheSETbuttonfor2secondsfromthenormalmodeofoperationtoaccessthe
SETUPmode.
SettingYear
Whenthetwo‐digityearnumberappears,usetheSELECTbuttontoincreasetheyearvalue.
PressSETtomovetothenextsetting
SettingMonth
Whenthetwo‐digitmonthappearsontheLCDpressSELECTtoincreasethemonth.PressSETto
saveandmovetothenextsetting.
SettingDate
Whenthetwo‐digitdateappearsonLCDpressSELECTtoincreasethedate.PressSETbuttonto
saveandmovetothenextsetting.
SettingHours
Whenthetwo‐digithourappearsontheLCDpressSELECTtoincreasethehour.PressSETto
movetothenextsetting.
SettingMinutes
Whenthetwo‐digitminutesvalueappearsontheLCDpressSELECTtoincreasetheminutes.
PressSETtomovetothenextsetting.
SettingSeconds
Whenthetwo‐digitsecondsvalueappearsontheLCDpressSELECTtoincreasetheseconds.
PressSETtomovetothenextsetting(highalarmbelow).
HighCO2Alarm
IntheSETUPmode,afterthedateandtimeareset(asdetailedabove)theA‐oniconwillbe
displayedintheupperdisplay.PresstheSELECTbuttontoswitchthealarmONorOFF.See
diagrambelow.
WhenthealarmisON,presstheSETbuttontosavethesettingandmovetoCO2alarmsetting.
ThemetershowsCO21000ppmasthedefaultalarm.TochangetheHighAlarm,pressthe
SELECTbuttontoincreasethevalue(pressandholdtheSELECTbuttontoscrollfaster).PressSET
tosaveandpressESCtoreturntothenormaloperatingmode.
Nowwhenthereadingexceedstheprogrammedlimitthemeterwillbeatoncepersecond.The
meterwillsoundthealarmuntilthereadingdoesnotexceedthealarmlimit,theuserchanges
thealarmlimitvalue,thealarmisswitchedoffasdescribedabove,orthemeterpoweris
removed.

8 CO220-EU-EN V1.3 07/13
AutomaticBaseline(ABC)Calibration
ABC(AutomaticBaselineCalibration)establishesabaselinecalibrationtoeliminatethezerodrift
oftheinfraredsensor.TheABCfunctionisalwaysONwhenthemeterisON.ABCisdesignedto
calibratethemeterattheminimumCO2readingdetectedduring7.5dayscontinuousmonitoring
(withpoweron).ItassumesthattheareabeingtestedreceivesfreshairwithaCO2levelof
approximately400ppmatsomeperiodoftimeduringthesevendays.Itisnotsuitabletouse
desktopCO2inclosedareaswithconsistentlyhighCO2levels24hoursaday.
NOTE:Afterthemeterhasbeenpoweredforoneday,presstheCO2buttontodetermineifthe
environmentissuitablefortheautomaticbaselinecalibration.
Maintenance
Cleaningandstorage
1. Themetershouldbecleanedwithadampclothandmilddetergentwhennecessary.Donot
usesolventsorabrasives.
2. Storethemeterinanareawithmoderatetemperatureandhumidity.

9 CO220-EU-EN V1.3 07/13
Specifications
FunctionRangeResolutionAccuracy
CO20to9999ppm1ppm±(5%rdg+50ppm)from0to2000ppm
Temperature
‐10to60°C
14to140°F 0.1°±0.6°C/1.0°F
RelativeHumidity0.1to99.9%0.1%
±3%(10to90%)
±5%(<10%or>90%)
@25°C
Display3‐tierMulti‐functionLCD
SensorTypeCO2:NDIR(non‐dispersiveinfrared)technology
Humidity:Capacitancesensor;
Temperature(air):Thermistor
Datalogging99points
OperatingConditions0to50°C(32to122°F);5to80%RH
StorageConditions‐20to50°C(14to122°F);5to90%RH
PowerSupply9VDCuniversalplugadapter
Dimensions155x87x81.5mm(6.1x3.4x3.2”)
Weight178g(6.2oz.)
Troubleshooting
Meterwon’tpowerONChecktoseethattheadaptorisproperlypluggedin.
SlowresponseCheckthattheairflowchannelsontherearofthe
meterhaveclearance.
ErrorCodes:
E‐1 CO2sensorisdamaged Returnforrepair
E‐2 Humiditysensoris
damaged
Returnforrepair
E‐3 Temperaturesensoris
damaged
Returnforrepair
E‐4Operatingtemperature
istoohigh
Putthemeterintypicalroom
temperaturefor30minutes,if
problempersists,returnforrepair
E‐5Operatingtemperature
istoolow
Putthemeterintypicalroom
temperaturefor30minutes,if
problempersists,returnforrepair
E‐6HardwarefailedReturnforrepair

10 CO220-EU-EN V1.3 07/13
CO2LevelsandGuidelines
IMPORTANTLIABILITYNOTE
TheCO2guidelinedataprovidedhereismeantforinformationalpurposesonlyandisnot
intendedasadirectrecommendationfromExtechInstrumentsorFLIRSystems.Theuser
musttakefullresponsibilitywhendetermininghowthisinformationistobeused.
Non‐EnforcedReferencelevels
250‐350ppm–background(normal)outdoorairlevel
350‐1,000ppm‐typicallevelfoundinoccupiedspaceswithgoodairexchange.
1,000–2,000ppm‐levelassociatedwithcomplaintsofdrowsinessandpoorair.
2,000–5,000ppm–levelassociatedwithheadaches,sleepiness,andstagnant,stale,stuffy
air.Poorconcentration,lossofattention,increasedheartrateandslightnauseamayalso
bepresent.
>5,000ppm–Exposuremayleadtoseriousoxygendeprivationresultinginpermanent
braindamage,comaandevendeath.
Regulatoryexposurelimits
ASHRAEStandard62‐1989:1000ppm:CO2concentrationinoccupiedbuildingshouldnot
exceed1000ppm.
OSHA:5000ppm:Timeweightedaverageoverfive8‐hourworkdaysshouldnotexceed
5000ppm
Buildingbulletin101(Bb101):1500ppm.UKstandardsforschoolssaythatCO2averaged
overtheentireday(i.e.9amto3.30pm)shouldnotexceed1500ppm.
Germany,Japan,Australia,UK:5000ppm,8hoursweightedaverageoccupational
exposurelimitis5000ppm.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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