Komatsu WA480-8 Operation & Maintenance Manual page 150

EXPLANATION OF COMPONENTS
1.
Select "GPS Synchronization" from the "Clock Adjustment"
menu, then press ENTER switch (1).
2.
Select "ON" or "OFF", then press ENTER switch (1).
"ON"
Sets the date and time automatically.
"OFF"
Does not set the date and time automatically. (Can be set
manually.)
REMARK
This setting is held even if the starting switch is turned to OFF
position.
The default is "OFF".
When the machine is in the environment where the radio
waves from GPS cannot be received, the automatic setting
function might be disable.
Turning the "GPS Synchronization" "ON" disables selecting the
"Calendar" and "Time".
CALENDAR SETTING
Adjust the date of the machine monitor.
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OPERATION