If there is 00 / - - reading on the display, there is no heart rate reception. Bring the wrist receiver up to your chest near the transmitter’s Polar logo. The receiver starts looking for the heart rate signal again.
At the start of your workout, 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.
Turning the Heart Rate Zone Alarm on/off
Note that you can not use the alarm when Bycicle functions 
are on. Note that trip distance is reset by pressing and holding signal/light button. Therefore Trip should not be displayed in the upper row when turning zone alarm on/off.
Press and hold the signal/light button.
When 
appears on the display the zone alarm is on. You will hear a beeping sound with each heartbeat if your heartbeat is outside the heart rate limit. If you do not want to use the zone alarm the flashing heart rate reading indicates if your heartbeat is outside the heart rate limit. This function can be used if you have set heart rate limits on in Interval Training Set or BasicSet.
In addition to the rate zone alarm you can see:
if you are exercising above heart rate zone.
if you are exercising below heart rate zone.
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