You might be planning to move your detector to a different room in your home or lend it to a friend or family member. Whatever the case, you need to start a new measurement to end the previous one and start fresh. This is because radon values are reported as averages and you don't want past data impacting the the future measurement.
IMPORTANT: If you are using your Corentium Home 2 without the app, starting a new measurement clears all previous data collected. If you want to retain the history, first Connect to the Airthings app and fully sync the data from your detector. Then start the new measurement.
Using the app, you will retain access to previous measurements.
Here’s how to do it
Open the back cover of the device. Simultaneously press and hold the Bluetooth and Units buttons for 5 seconds to start a new measurement.
Your Corentium Home 2 will restart and your first new radon values will be available in 24 hours.
Within about an hour, you will see a vertical blue line appear in the graphs for radon, temperature and humidity. This signifies the divide between the previous measurement and the new one.