User manual

EXTECHINSTRUMENTS
5CO240‐en‐GB_v1.63/15
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 CO
2
 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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