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DISPLAY AND KEYBOARD DESCRIPTION
1. Graphic LCD
2. Battery level indicator
3. Softkeys
4. On/Off key: turn the meter on and off
5. Lamp key: turn the backlight on and off
6. Alphanumeric keyboard: insert alphanumeric codes
7. / Arrow keys: scroll the displayed options/message
8. HELP key: obtain information about the displayed screen
9. ESC key: return to the previous screen
10. Softkey functions defined on display