Automatic Baseline Calibration; Manual Calibration - Wohler CDL 110 Instructions De Service

CO2-Calibration
8.1 Automatic Base-
line Calibration
8.2 Manual Calibra-
tion
Fig. 18: Display during the CO
tion
46
The automatic baseline calibration (ABC) elimi-
nates the zero drift of the infrared sensor. The
ABC function is always ON when turning on the
meter.
ABC is to calibrate the meter at the minimum CO
reading detected during 7.5 days continuous mon-
itoring (power on). It is supposed that in the venti-
lating area there is fresh air with CO
400 ppm during a period of time.
WARNING!
For the described reasons, the automatic baseline
calibration cannot be done in close area with
higher CO
shut.
The manual calibration is suggested to be done
outdoor, e.g. on an exterior window ledge, on a
sunny day where CO
Do not calibrate on rainy days, because the high
humidity will affect the CO
Do not calibrate the meter in places crowded with
people or close to where exist high CO
tration such as ventilating outlets or fireplaces.
Turn on the meter and hold down SET, ▲ and
•
MIN/MAX▼ simultaneously and more than 1
second to enter CO
400 ppm and CO
performing calibration, Fig. 18. Wait about
5 minutes until the blinking stops and the calibra-
tion is completed automatically. The meter will
calibra-
2
return to normal mode now.
To abort the calibration, press RESET for more
than 1 second.
level such as places with windows
2
level is around 400 ppm.
2
NOTE!
calibration mode, Fig. 18.
2
are blinking on the LCD while
2
level around
2
level in air.
2
concen-
2
2