POLAR M21 - Manual (Page 29)

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FUNCTIONS DURING
HEART RATE MEASUREMENT
MEASURE
EXERCISE TIME IN ZONE OWNCAL
S E E Y O U R H E A R T R A T E
You can see your heart rate in beats per minute. A flashing
heart symbol indicates an ongoing heart rate measurement.
The inner heart symbol flashes at the pace of your heart. The
outline indicates that the heart rate reception is coded.
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.
I L L U M I N A T E T H E D I S P L A Y
Press
Backlight is activated for a few seconds.
T U R N T H E S O U N D S I G N A L A N D
T H E B U T T O N S O U N D O N / O F F
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.
M52 man USA GBR A 2001 10/12/01, 12:46 30