More than sensors+automation

An 'ERR' error message appears on the device.

Calibration of the relative cell constant or determination of the temperature coefficient of the medium to be measured was completed with an error. The previous data is saved.
The factory data is displayed (Cell = 100%, ALPH= 2.3).
To remedy the 'ERR' error message, manually change the two parameters using the keyboard (e.g. change by one digit up or down and confirm with the PGM key) or re-calibrate the system.