How often do I have to make calibration?

Re-calibrate every 28 days. This product has been tested by calibration every 28 days for measurement accuracy. Even if user is changed, the measurement should be made after calibration by the new user.

After 28 days of the last calibration, the measurement cannot be made. This is an issue that is enforced by the certificating authority for measurement accuracy.

If you enter 'Notifications' in the drawer menu and turn on ‘Calibration reminder', you will be notified 3 days prior to calibration.