6-11
Section
System Maintenance
161
After confirming the result of the check, press Quit. The NT21 returns to the DE-
VICE CHECK MENU screen.
Note If a battery is installed and low battery voltage is detected, replace the battery
immediately. For details on the replacement method, refer to 7-3-1 Replacing
the Battery (page 184).
6-11-7 Checking Interfaces
The NT21 allows the following communication functions to be checked.
•
Communication with the NT Support Tool
Page 161
•
Communication at serial ports
Page 163