Amprobe CO2-200 CO2-Meter - Manual (Page 12)

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When entering setup mode, P1.0 and “AL” are displayed
on the LCD (Fig. 4). Press “SET” again to go into P1.1 for
setting CO2 upper limit. The current set value will be
blinking on LCD (Fig.5). Press “p/DP/WB” to increase the
value or “MNX/AVG/q”to decrease. Each press tunes
100 ppm and the alarm range is from 100 to 9900ppm.
When the preferred value is set, press “SET” to go into
P1.2 for lower limit setting. After both settings are done,
press “SET” to save or “CAL/ESC” without saving and
return to P1.0.
P3.0: Temperature scale
Press “p/DP/WB“ in P1.0 to access P3.0 for setting up
temperature scale. Press “SET” and it goes into P3.1 with
blinking °C or °F current set on the lower left display.
To switch °C or °F, press “p/DP/WB “or “MNX/AVG/q”.
Then press “SET” to save the setting or “CAL/ESC”
without saving and return to P3.0.
P4.0: ABC selection
Press “p/DP/WB“ in P3.0 or “MNX/AVG/q” in P1.0 to
access P4.0 for selecting ABC function. Press “SET” and it
goes into P4.1 with blinking “dis” default (Fig. 6) on the
lower left display. To enable the ABC function, press “p/
DP/WB“ or “MNX/AVG/q” and “En” blinks for choice.
After the preferred selection is done, press “SET” to save
the setting or “CAL/ESC” without saving and return to
P4.0.
Calibration Mode
CO2 calibration
ABC (Automatic Baseline Calibration)
ABC is to implement baseline calibration to
eliminate the zero drift of the NDIR sensor. It
calibrates the meter at the minimum CO2 reading
detected during 7 days continuous monitoring
(power on). It’s not suitable to implement ABC in
close area with higher CO2 level all the time. The
ABC default is off. To enable the function, please
refer to SETUP P4.0.