3. Rotary knob and function keys
Left Operation: The left moving key
Right Operation: The right moving key
ESC: Can be used to exit from any working state
OK: Confirmation key
Rotary knob: The rotary dial
Fig 5 Rotary knob and function keys
1.4.2.2 Back view
Fig 6 Back View
The fuse can be changed easily by using a small screwdriver.