Nako Na-613d User Manual ((link))

From standard time mode, press . The seconds digits will begin flashing, indicating entry into configuration mode. Press [D] to reset the seconds counter back to 00 .

Press once. The minute digits will start flashing. Press [D] incrementally to advance to the correct minute. nako na-613d user manual

To record a while the clock continues running in the background: Press [S] while tracking is live. The screen freezes to show the lap time, but internal counting proceeds. Press [S] again to unfreeze the layout and catch up to the current running total. From standard time mode, press

Press M two times to enter alarm mode. Use S to toggle between hours and minutes, and press D to change the digits. Press M to exit. From standard time mode