MANUAL P 38 NO MENTION MADE
This is prior Thread this site.

How do I reset the system timer on the main screen?
The TIMER display shows the system timer. This shows the time the unit has been in use. To reset this timer press the down cursor key from the main screen. Then when that is blinking press the dial until it resets. Many modelers use this timer to keep track of how long the radio has been on since last charge.
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