Extech Instruments CO240 User manual

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USERMANUAL
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CarbonDioxideMeter
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ModelCO240
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AdditionalUserManualTranslationsavailableatwww.extech.com

EXTECHINSTRUMENTS
2CO240‐en‐GB_v1.711/16
Introduction
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ThankyouforselectingtheExtechInstrumentsModelCO240.TheCO240measuresCarbon
Dioxide(CO2),AirTemperature,andRelativeHumidity.ItalsocalculatesDewPointTemperature
andWetBulbTemperature.Theuser‐programmablehighalarmfeaturealertstheuserwhen
CO2levelrisesabovetheprogrammedlimitandthedatastreamingfeatureallowsreadingstobe
capturedinrealtimebyPC(USBconnection).Thisdeviceisshippedfullytestedandcalibrated
and,withproperuse,willprovideyearsofreliableservice.Pleasevisitourwebsite
(www.extech.com)tocheckforthelatestversionofthisUserGuide,ProductUpdates,and
CustomerSupport.
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Features
PortablemetermeasuresCO2,AirTemperature,andRelativehumidityaccurately
MeasuresCO2(0~9,999ppm)usingNDIR(Non‐dispersiveInfraredTechnology)
DualdisplayindicatesRelativeHumidity/AirTemperatureandCO2
CalculatesDewPointandWetBulbTemperature
AdjustableCO2highalarmthresholdwithaudiblebeeper
Tripodmount
USBcableforPCdatastreaming(softwaresupplied)
BatteryorACAdaptorPowered
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EXTECHINSTRUMENTS
3CO240‐en‐GB_v1.711/16
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MeterDescription
1. Sensors
2. LCDScreen
3. HOLD/UpArrowButton
4. MODE/LeftArrowButton
5. SETButton
6. ACAdaptorjack
7. TripodMount
8. POWER( )Button
9. (Max/Min)/ RightArrowButton
10. UNITButton
11.  DownArrowButton
12. USBPCinterfaceport
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Batterycompartmentonrearofmeter.

EXTECHINSTRUMENTS
4CO240‐en‐GB_v1.711/16
Operation
Poweringthemeter
MomentarilypressthePOWERbuttontopoweronthemeter.HoldthePOWERbuttonfor2
secondstoturnoffthemeter.Duringmeasurement,ifthealarmissounding(audiblebeeper)
pressthePOWERbuttonmomentarilytoturnoffthebeeper.Pressagaintoactivatethebeeper
function.ThealarmbeeperissettoONbydefault.Themetercanbepoweredby6AAA
batteriesorACAdaptor.
Recommendation:Fordatalogging,powertheunitusinganAC/DCadaptorinordertoconserve
batterypower.
AutoPowerOff
TheCO240willautomaticallyturnoffafter20minutesofinactivity.Todisabletheautopower
offfunction:WiththemeterOFF,pressandholdtheHOLDbuttonandthenpressthePOWER
button.TheLCDwillshow“n”,andwillthenreturntonormalmeasurementmode.
Measurements
Whenthemeteristurnedon,aself‐testisimplemented.DuetothenatureoftheNDIRsensor,
ittypicallyrequiresapproximatelytenminutestoobtainstable,accuratereadings.IftheUSB
cableisconnectedtotheCO240,theUSBsymbolwillbeshownontheLCD.
ThetemperatureandrelativehumidityreadingswillalternateonthelowerLCDlinealongwith
theCO2readingonthetopdisplayline.UsetheMODEbuttontoswitchtoDP(DewPoint
Temperature)andWB(WetBulbTemperature)modes(lowerdisplayline).
MaximumandMinimumReadingsMemory
MomentarilypresstheMAX/MINbuttontoreviewthemaximumandminimumreadings
capturedsincethemeterwaspoweredon.Pressingthebuttononcewillshowthemaximum
value.Pressingthebuttonagainwilldisplaytheminimumvalue.Pressingthebuttonathirdtime
willreturnthemetertoitsnormalmodeofoperation.WhileinMAX‐MINmode,pressandhold
theHOLDbuttonfor2secondstoreset(clear)thestoredmaximumandminimumvalues.
SelectingoC/oFunitsofmeasure
PresstheUNITbuttontoselectthedesiredtemperatureunitofmeasure.
Calibration
PressandholdtheSET+UNITbuttonsfor2secondstoentertheself‐calibrationmode.Ensure
thatthereisaslittleCO2presentaspossible.Itisrecommendedthatthisbedoneinoutsideair.
TheLCDwilldisplay“CAL”andwillperforma60‐secondcountdownasitperformsthe
calibration.Areadingof“400”isdisplayedasanormalCO2levelreferencevalueduringthe
calibration.Afterthecalibrationhascompleted,themeterwillreturntoitsnormalmode
operation.

EXTECHINSTRUMENTS
5CO240‐en‐GB_v1.711/16
AutomaticCO2BaselineCalibration(ABC)
TheABCalgorithmcontinuallytracksthesensor’slowestreadingoverafixedtimeintervaland
slowlycorrectsforanylong‐termdrift(ascomparedtotheexpectedfreshairvalueof400ppm).
TheABCperiodis15days,duringwhichtheABCfunctiondefaultisalwayson.
CO2AlarmSetting
PressandholdtheSETbuttonfor2secondstoenterthehighCO2alarmthreshold.Pressthe
HOLDbuttontoincreasethevalue,andtheDownarrowbuttontodecreasethevalue.Pressthe
MODEbuttontoselectthedigittotheleftandpresstheMAX/MINbuttontoselectthedigitto
theright.Oncethedesiredvalueisset,presstheSETbuttonfor2secondstosavethealarm
setting.TheLCDwillreturntoitsnormalmodeofoperation.Themeteralarmlimitdefaultis
1000ppm(OSHA).MomentarilypressthePOWERbuttontotogglethealarmonandoff.
DataStreamingtoPC
TheCO240featuresreal‐timedatastreamingtoaPCusingthesuppliedSW200‐Ssoftware.
WhenthemeterisconnectedtoaPC,theUSBiconwillbevisibleontheLCDdisplay.Please
installtheUSBdriverandsuppliedsoftwarebeforeattemptingtostreamdata.RefertotheHelp
Utilitywithinthesoftwareprogramforfurtherdetails.
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EXTECHINSTRUMENTS
6CO240‐en‐GB_v1.711/16
MaintenanceandTroubleshooting
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BatteryReplacement
WhenthebatteryiconappearsontheLCD,thebatteriesmustbereplaced.
Inadownwardmotion,slidetherearbatterycompartmentcoveroffofthemeterhousing.
Removetheoldbatteriesandreplacewithnewbatteries(allofthesametype)observingcorrect
polarity.Thismeterusessix(6)1.5VAAAbatteries.Pleasereplacethebatterycompartment
coverbeforeattemptingtousethemeter.
Neverdisposeofusedbatteriesorrechargeablebatteriesinhouseholdwaste.
Asconsumers,usersarelegallyrequiredtotakeusedbatteriestoappropriate
collectionsites,theretailstorewherethebatterieswerepurchased,orwherever
batteriesaresold.
Disposal:Donotdisposeofthisinstrumentinhouseholdwaste.Theuserisobligatedtotake
end‐of‐lifedevicestoadesignatedcollectionpointforthedisposalofelectricalandelectronic
equipment.
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BatterySafetyReminders
oPleasedisposeofbatteriesresponsibly;observeallrelevantregulations.
oNeverdisposeofbatteriesinafire;batteriesmayexplodeorleak.
oNevermixbatterytypes;installnewbatteriesofthesametype.
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Troubleshooting/ErrorMessageDisplays
ErraticReadingsReplacethebatteriesorusetheAC/DCadaptorandcheckagain.
ER1DisplayCO2,TemperatureorHumiditysensorfailureorasensorcommunication
error.Sendforserviceifdisplaypersists.
ER2Display Out‐of‐rangeconditionforCO2,TemperatureorRelativeHumidity.
DetectedreadingexceedsCO2,TemperatureorHumidityrange
specification.Thiserrorisnormalwhenclearingthemaximumand
minimumreadingsintheMAX/MINmode.
“9999”DisplayReadingexceedstheCO2maximummeasurementrangeorthebattery
powerisweak.
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EXTECHINSTRUMENTS
7CO240‐en‐GB_v1.711/16
Specifications
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Display  DualmultifunctionLCD
CO2measurerange 0to9,999ppm
CO2accuracy  ±(75ppm+5%ofreading)0to2,000ppm
OperatingTemperature0to50°C(32to122°F);0.1°resolution
TemperatureAccuracy±1°C(1.8°F)
OperatingRelativeHumidity0to95%RH(avoidcondensation)
RelativeHumidityAccuracy ±5%ofrdgat25°C(77°F)otherwise±7%RH
DewPointTemperaturerange‐72.9to47°C(‐99.22to118°F);0.1°resolution
WetBulbTemperaturerange‐11to48.2°C(12.2to118.8°F);0.1°resolution
StorageTemperature‐20to50°C(‐4to122°F)
StorageHumidity 0to95%RH(avoidcondensation)
Power   AAAbatteriesx6pcsorACadaptor
Dimensions 211x60x40mm(8.3x2.4x1.6")
Weight  181.4g(6.4oz.)
Copyright©2014‐2016FLIRSystems,Inc.
Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform
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