There are three calibration modes: manual (M), semi-automatic (SA) and automatic (?).
1.
Press and hold down the ?enu (3) button to enter the main menu.
2.
Select the Calibration Mode option with the UP (2)/DOWN (5) buttons.
3.
Press briefly the Menu (3) button to enter submenu.
4.
Select the desired calibration mode with the UP (2)/DOWN (5) buttons.
5.
Confirm your selection with a brief press of the Menu (3) button.
More details in the section Microbolometer Calibration.