Table des matières
51
EN
9.7
Manual CO
2
-
Calibration
The meter is calibrated at standard 400 ppm CO
2
concentration in factory. It is suggested to do man-
ual calibration regularly and especially before using
it for the first time to maintain good accuracy. (Use
power bank if no power connection available). The
calibration will last about 5 minutes.
When accuracy becomes a concern after a long
time usage or other special conditions, return to
dealers for standard calibration.
ATTENTION!
Do not calibrate the meter in the air with unknown
CO
2
level. Otherwise, it will be taken as 400 ppm
and this fact leads to inaccurate measurements.
The manual calibration is suggested to be done
outdoor, e.g. on an exterior window ledge, on a
sunny day where CO
2
level is around 400 ppm.
NOTE!
Do not calibrate on rainy days, because the high
humidity will affect the CO
2
level in air.
•
Do not calibrate the meter in places crowded
with people or close to where exist high CO
2
concentration such as ventilating outlets or
fireplaces.
Exit Manual Calibration Menu
without performing a calibration
•
To exit the Manual Calibration Menu
without
performing a calibration
, press the
Ξ
-key.
“Exit" appears in the display.
•
Confirm with the ●
-key to return to the meas-
urement display.
•
If you want to carry out the calibration, pro-
ceed as follows:
Содержание IQ 300
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