EXTECHINSTRUMENTS
CO30USERGUIDE3CO30‐en‐GB_v1.612/14
Operation
Poweringthemeter
Ifthemeterissuppliedwithoutbatteriesinstalled,installthesuppliedbatteriesintherear
batterycompartmenttopowerthemeter.Pleaseobserveproperpolarity.
Ifthemeterissuppliedwiththebatteriesinstalled,andaprotectivebatterystripisinstalledin
thebatterycompartment,removetheprotectivestriptopowerthemeter.
Alternatively,plugtheACadaptorintothejackonthesideofthemeterandthenintoanAC
powersourcetopowerthemeter.
NormalOperationMode
WhenswitchedON,theLCDdisplays‘0000’foraperiodoftime,dependingonthetimethatthe
meterhasbeeninactive.Themeterwillthenproceedtothenormalmodeofoperationwhere
theLCDdisplaysthecurrentCOlevelsinppm,theTemperature(°C/°F),andRH%(relative
humidity)alternatelyevery6seconds.
StatusIndicatorLED
TheFrontpanelstatusLEDusesacolor‐codingsystemtoinformtheuserastothemeasuredCO
concentration;GreenforGood(<10ppm);YellowforCaution(10to29ppm);RedforDanger
(>30ppm).IftheLEDfailstoilluminatepleasereturntheunitforservice.
Controlbutton
TheControlbuttonlocatedontheleftsideofthemeterisusedtocontrolandprogramavariety
ofmeterfunctions.PressandholdtheControlbuttonforatleast3secondstoaccessthe
ControlSetupMode.RepeatedpressesoftheControlbuttoncyclethroughtheavailable
parameters.Theseparameters,inorder,are:
ZEROCalibration
TemperatureUnitselection(°C/°F)
Temperaturecompensation(usedinconjunctionwithsidepotentiometer)
Humiditycompensation(usedinconjunctionwithsidepotentiometer)
AlarmBeeperThreshold(25,30,35,50,100,200ppm)
FactoryDefaultsettingreset
Escape/Return(abortandreturntonormalmode)
ZEROCalibration
EnsurethattheZeroCalibrationisperformedinacleanairenvironment(noCOgases).
PressandholdtheControlbuttonfor3seconds(until appearsontheLCDscreen)and
thenpressandholdtheControlbuttonagaintoenterthecalibrationmode(‘CAL’should
appearonthedisplay).