POLAR S725 - Manual (Page 52)

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Recording mode
Before starting recording, check that you have enough memory left.
This information is displayed in the upper row, in the Measuring mode.
If you are starting from the Time of day display, press and hold OK.
Exercise information will be stored in an exercise file only when the
stopwatch is running. The ongoing recording is indicated with a graphic
bar that runs continuously on the display.
If your preset exercise requires cycling settings, Set Bike is displayed for a
few seconds. In order to start the exercise set you need to select bike 1 or 2 by
pressing and holding the down button until the desired bike is displayed.
The choice is displayed in the lower right corner:
b0= bike off
b1= bike 1 settings on
b2= bike 2 settings on
If there is - - / 00 reading on the display, there is no heart rate reception.
Bring the wrist unit up to your chest near the transmitter’s Polar logo. The
wrist unit starts looking for the heart rate signal again.
In the beginning of your exercise, when it has lasted less than
60 minutes, the exercise time is displayed in minutes and seconds.
When you have exercised more than 60 minutes, the exercise time is
displayed in hours and minutes.