Citizen Systems CMP-10BT Benutzerhandbuch

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Power is automatically cut off after a specified period of time, during
which no command is sent to the printer and the LF switch has not
been pressed.
The default setting of this time duration is 10 minutes, however, the
period can be custom set by the user with a special command to the
printer.  (see Command Reference List)
The behavior of the printer at the operation of Auto Power OFF is the
same as that when power is turned OFF by the Power switch.

The interface is automatically selected depending on the presence or
absence of connection to the serial port with a serial cable connector.

● At POWER ON, no cable is connected, the IrDA/Bluetooth interface

is selected.

● At POWER ON, the cable is connected, the Serial interface is selected.

If cable is connected with printer power ON, selecting IrDA/Bluetooth interface
remains valid.  If you want to use the serial interface, turn the printer power
OFF once, connect the serial cable, and then turn the printer power ON again.

Battery charge level is monitored at Power ON, before paper feeding,
and before printing.
When the buzzer sounds three times or “Low Battery” is printed,
immediately charge the battery.