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3.2
Function keys
The keypad consists of 18 keys. The keys from 0 to 9 and the decimal point are used to enter
numbers
Key
Name
Up / + key
Down / - key
Back key
ENTER key
MENU key
ON / OFF key
Reset key
4
Getting started
4.1
Internal battery
The device can be powered either by the internal rechargeable battery (more than 12 hours with
continuous operation) or via the mains adaptor.
During charging, the LED glows red. It will turn green as soon as the battery is fully charged.
When the battery is fully charged, the voltage is approx. 4.25 V. The voltage is shown in window
M07. The battery is nearly flat when the voltage falls below 3 V. The device also indicates the
remaining battery life which is determined internally via the voltage. The indication of the remaining
battery life is just a rough guide value.
4.2
Power on
The device can be switched on via the ON key and switched off using the OFF key. After switching
on, the device runs a self-diagnostic programme. The hardware and the internal software are tested.
If an error is detected, this will be shown in the display.
Function
Press to select different window or enter numbers
Press to go one step back or move cursor left
Press to confirm or make a selection
Press to enter menu mode or press followed by
two digits to enter a certain menu window
Press to switch ON / OFF
Press to reset device to factory default settings
26
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