4.Have you had a cardiac event which may have altered your ECG waveform? In this case consult your physician.
...heart symbol flashes irregularly?
1.Check that your Polar wrist unit is inside the transmission range and not further that 3 feet/1 meter from the Polar Transmitter you are wearing.
2.Check that the elastic strap has not become loose during exercise.
3.Make sure that the electrodes of the transmitter are moistened.
4.Make sure that there is no other heart rate transmitter within the reception range (3 feet/1 meter).
5.Cardiac arrythmia may cause irregular readings. In this case consult your physician.
...other person with heart rate monitor is causing interference? Your training partner may have coincidentally activated exactly the same code as you. In this case keep distance to your training partner or proceed as follows:
1.Stop the stopwatch and heart rate measurement.
2.Take the transmitter off your chest for 10 seconds.
3.Put the transmitter back and start the heart rate measurement again.
...heart rate reading becomes erratic or extremely high?
You may have come within range of strong electromagnetic signals which cause erratic readings on the wrist unit display. Check your surroundings and move further away from the source of disturbance.
...there are no reactions to any buttons?
Reset the Polar Heart Rate Monitor. Resetting clears watch settings which will return to the default settings. User information and measurement options settings will be saved.
1.Press the RESET button with a pen tip. Display becomes full of digits.
2.Press any of the four button once.
The Polar Heart Rate Monitor enters the Time of day display.
If you don't press any button after reset within one minute the wrist unit goes to the battery saving mode.
...the display is blank or fading?
The Polar Heart Rate Monitor is in battery saving mode when it leaves the factory. Wake up by pressing START/STOP/OK button twice. The Polar Heart Rate Monitor enters the Time of day display.
Usually the first sign of a discharged battery is fading of the digits when using the backlight. Have the batteries checked.
...the battery of the wrist unit must be replaced?
We recommend having all service done by an authorized Polar Service Center. This is especially necessary to ensure the warranty remains valid and is not affected by incorrect repair procedures done by an unauthorized agent. Polar Service will test your wrist unit for water resistance after battery replacement and make a full periodic check of the complete Polar Heart Rate Monitor.
76 
ENGLISH
