DISABLE ABC FUNCTION
The meter is default with ABC for automatically
It assumes that the area being tested receives fresh air with
a CO
2
level of approximately 400ppm at some period of time
during the seven days. It is not suitable to use desktop CO
2
in closed areas with consistently high CO
2
levels 24 hours a
day.
For example, if the monitor is located in 24 hours area, such
as hospital or convenient stores, the ABC function should
be turned off for not being calibrated with high CO
2
level.
When adaptor plug in, long press
POWER
button to turn off
the meter. Hold
MODE+UNIT
and press
POWER
button.
Display shows “AbcOn”. Press
SEL/R
to select ABC
function ON or OFF. Press
TRH/M
to save setting and meter
will restart automatically.
Step2:Hold
MODE
+
UNIT
Step1:Long press
POWER
turn off meter
Step3:Press
POWER
to enter ABC function.
Display shows below.
ppm
Co
2
ppm
Co
2
Press
SEL
./
R
Step4:Press
SEL/R
to select AbcOn or off.
Step5:Press
TRH/M
to save. Meter restarts
automatically.
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