Manual

15
CO CALIBRATION
2
CAUTION:
Do not calibrate the meter in the air
with unknown CO concentration.
2
Otherwise, it will be calibrated as
400ppm by default and leads to
inaccurate measurements.
NOTE:
Ensure the batteries are with full voltage
during the calibration to prevent from
interruption or failed calibration.
The manual calibration is suggested to
to be done in fresh outdoor air that is
well ventilated and in sunny weather.
Place the meter in the calibration site.
Press , , simultaneously
for 3 seconds to turn on the meter and
enter calibration mode (Fig.33). Two
calibration menu is available: Humidity
/CO2.
Press key to select the CO2
calibration. 400ppm and “ “ icon
are blinking on the LCD. Press
to start calibration. (Fig.34)
Wait about 10 minutes until the blinking
stops and the calibration is completed
automatically. To abort the calibration,
turn off the meter at any time.
The meter is calibrated at standard
400ppm CO concentration in factory.
2
It’s suggested to do manual calibration
regularly to maintain good accuracy.
Note:
When the accuracy becomes a concern
after a long time usage, return to dealers
for standard calibration.
START
ESC
MEM
SET
ON/OFF
CAL
HOLD
MAX/AVG
MIN