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5. RTC
Current time/date is displayed. Verify. Press any key to return to the
diagnostics menu.
6. SCANNER
Connect a bar code scanner to test bar code input by scanning bar
code labels. Press any key to return to the diagnostics menu.
7. RAM BACKUP
Follow the instruction displayed on the LCD to press the [PWR] key
to turn the power off and on to verify the memory backup.
8. EXIT
Return to the Ready mode of operation.