In models M51 and M52 the sound signal will also alarm you at the end of the Fitness test.
Press and hold 
for 2 seconds to turn the sound signal and the button sound on and off.
Sound signal is on.
A flashing heart rate reading also informs you of being outside your target zone.
The sound signal setting is saved i.e. the next time you start heart rate measurement the previous setting will be used.
S W A P T H E U S E R
In models M51 and M52 you can swap the user in the beginning of an exercise when the stopwatch is not running yet.
Press and hold 
SCROLL UP.
or 
is displayed to indicate which one of the user settings are activated.
The following exercise will be recorded in the selected user’s file.
To be able to swap the user you need to set preferences for two users.
S T A R T / S T O P T H E S T O P W A T C H
Press START/STOP/OK to start/stop the stopwatch.
Exercise information will be stored in an exercise file only when the stopwatch is running.
You can pause the stopwatch by pressing START/STOP/OK. Repressing it will restart the stopwatch and the above calculations.
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