13. Switching Between F/C
13.1 Press “set” button for 4 seconds,
display shows LCK
13.2 Input 68 then press “set” button to
enter into second level menu.
13.3 Press “set” button to select “Pb” mode.
Press up and down button to make tem-
perature calibration.
13.4 Press “set” button 4 seconds to quit.