Meter Description; Operation; Powering The Meter - Extech Instruments CO240 User Manual

Meter Description

1. Sensors
2. LCD Screen
3. HOLD / Up Arrow Button
4. MODE /
5. SET Button
6. AC Adaptor jack
7. Tripod Mount
8. POWER ( ) Button
9. (Max/Min) /
10. UNIT Button
11. Down Arrow Button
12. USB PC interface port
Battery compartment on rear of meter.

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.
Left Arrow Button
Right Arrow Button
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