© PCE Instruments
5
3.2.8
Calibration
3.2.8.1
CO
2
factory calibration
Touch the menu item RESET CO
2
To Factory Settings to calibrate the CO
2
sensor to factory
settings. The meter must be placed in a well ventilated room or placed outside and run for 15
minutes.
3.2.8.2
Automatic calibration
The PCE-CMM 8 has an integrated self-correcting ABC algorithm (Automatic Baseline
Correction) for automatic adjustment of the baseline value. This calibration is carried out regularly
at intervals of 10-15 days.
For this, the PCE-CMM 8 requires a regular supply of fresh air. The measured value is
automatically adjusted.
The ABC function is permanently switched on (cannot be switched off) and adjusts the baseline
value at regular intervals when the CO2 level is low. Do not use this meter in a closed environment
where the CO2 concentration remains relatively high. This would negatively affect the self-
correction of the device. We therefore recommend performing the manual calibration (3.2.8.1)
weekly.
3.2.9
Offset settings
3.2.9.1
CO
2
offset
Touch the menu item CO
2
Sensor Calibration
to set an offset for the CO
2
reading.
3.2.9.2
Temperature offset
Touch the menu item Built In Sensor
to set an offset for the temperature reading.
3.2.9.3
Humidity sensor offset
Touch the menu item Humidity Sensor
to set an offset for the humidity value reading.
3.2.10
Selecting the time zone
Touch this menu item to set the time difference from GMT. Press the
key to enable
synchronisation of the power on/off time with the internet time. To do this, the meter must be
successfully connected to the internet.
3.2.11
Daylight saving time
Touch the menu item
to set the daylight saving time based on the location.
3.2.12
Home screen colour
In the menu item Home Screen Colour
, select whether the background colour should be blue
or black.
