POLAR M21 - Manual (Page 24)

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In models M51 and M52 check that your personal user id
is active (USER 1 or USER 2). You can change the user
before starting the stopwatch by pressing and holding
SCROLL UP. To be able to swap the user you need to
set preferences for two users.
5. Start the stopwatch by pressing
START/STOP/OK.
Stopwatch starts running.
Automatic recording begins.
If you set OwnZone on:
OZ appears in
the display and OwnZone
determination begins.
If you set heart rate limits
manually: EXERCISE appears
in the display.
6. You can now start warmup with your Polar Heart Rate
Monitor.
Quick start: In the Time of Day display, press and
hold START/STOP/OK for a couple of seconds.
To stop the heart rate measurement:
Press START/STOP/OK to stop the stopwatch. If you
want to QUIT the heart rate measurement mode,
press SCROLL UP or
SCROLL DOWN to enter
the Time of Day display.
M52 man USA GBR A 2001 10/12/01, 12:46 25