4 blank function keys to select the various menus shown on the screen. Note: for the purposes of this manual, the buttons are referred to as F1, F2,
F3 and F4 but are not labelled on the unit.
•
A navigator:
•
A cancel key:
•
A Start/stop key for the unit and back-lighting on/off key:
A short push switches the unit on. During operation, a short push switches the back-lighting on or off. A long push of 2 seconds switches the unit off.
•
12 alphanumeric keys for programming the parameters.