Polar M21 Heart Rate Monitor User Manual


 
30
MEASURE
EXERCISE TIME IN ZONE OWNCAL
FUNCTIONS DURING
HEART RATE MEASUREMENT
SEE YOUR HEART RATE
You can see your heart rate in beats per minute. A flashing
heart symbol indicates an ongoing heart rate
measurement. The heart symbol flashes at the pace of your
heart.
If there is - - reading on the display, there has not
been heart rate reception for at least 5 minutes.
Bring the wrist receiver up to your chest near the
transmitter’s Polar logo. The receiver starts looking
for the heart rate again.
ILLUMINATE THE DISPLAY
Press
.
Backlight is activated for a few seconds.
TURN THE SOUND SIGNAL AND
THE BUTTON SOUND ON/OFF
When appears in the display, you will hear an alarm
sound with each heart beat if you go above the upper limit
or below the lower limit of your Target Zone. You will hear
a beep when pressing the buttons. The sound signal will be
on in OwnZone determination.