6-11SectionSystem 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
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