9
CO CALIBRATION
2
CAUTION:
1. Do not calibrate the meter in the
air with unknown CO level.
2
Otherwise, it will be taken as 400
ppm and leads to inaccurate
measurements.
2. When operating the meter in the
closed indoor areas that are not
ventilating,
be sure
to disable the ABC function to
prevent incorrect calibration.
such as hospitals or
offices with windows shut,
The meter is calibrated at standard
400ppm CO concentration in factory.
2
It’s suggested to do either ABC or
manual calibration regularly to maintain
the good accuracy.
Fig. 14
Fig. 15
CO
2
CO
2
Press key enter
P4.1
with blinking
"en" icon (Fig.14) on the lower LCD. To
disable the ABC function, press or
and "dis" blinks for choice (Fig.15).
After the preferred selection is done,
press key to save the setting or
without saving and return to
P4.0
.
SET
SET
DP/WB
M /
X
N
AVG
SET
SET
CAL
ESC
CAL
ESC
Note:
When the accuracy becomes a concern
after a long time usage or other special
conditions, return to dealers for standard
calibration.
