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CO
Alarm Setting
2
Press and hold the SET button for 2 seconds to enter the high CO
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.
PC Software
This
meter
has
Check the software download page of the website www.extech.com/software/downloads for
the latest version of the PC software and its operating system compatibility.
Download and unzip the software. Run ExtechInstaller.exe and then refer to the instructions
provided in the HELP Utility within the software program.
the
capability
to
connect
to
and
5
alarm threshold. Press the
2
communicate
with
CO240-en-US_v1.9 10/22
a
PC.
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