How do I change the upper CO2 limit on my TFA Dostmann Aircontrol Up 31.5011.10 CO2 meter?

[JulietteDella]

To adjust the upper CO2 limit on your TFA 31.5011.10 Dostmann Aircontrol Up Single Beam CO2 Reading Device, follow these straightforward steps:

1. Initiate the Process: In normal operating mode, briefly press the CO2 SET button. The display will show either the current upper CO2 limit (typically 2000 ppm by default) or the previously set limit.
2. Enter Setting Mode: Hold down the CO2 SET button for about two seconds. The displayed value will begin to flash, indicating you've entered the setting adjustment mode.
3. Adjust the Limit: Use either the DOWN/CALIBRATE button or the UP/°C/°F button to adjust the upper limit. Each press changes the value in increments of 10 ppm while the number is flashing.
4. Speed Up Adjustment: For quicker adjustments, hold down the DOWN/CALIBRATE or UP/°C/°F button while in setting mode.
5. Confirm Your Setting: Once you've set your desired limit, confirm the change by pressing the CO2 SET button again.
6. Automatic Save: If no button is pressed for 20 seconds, the device will automatically save the new upper CO2 limit and exit the setting mode.

By following these steps, you can easily customize the upper CO2 limit on your TFA Dostmann Aircontrol Up 31.5011.10 to align with your needs.