Operation Manual

the symbol appears, the training computer sounds and backlight are automatically deactivated. For further
information on changing the battery, see Important Information (page 48).
...I do not know where I am in the menu?
Press and hold BACK until the time of day is displayed.
...there are no reactions to any buttons?
Reset the training computer by pressing all the buttons simultaneously for two seconds until the display
fills with digits. Press any button, select language and set the time and date in Basic Settings after the
reset. All other settings are saved. Skip the rest of the settings by pressing and holding BACK.
...the heart rate reading becomes erratic, extremely high or shows nil (00)?
• Make sure the heart rate sensor strap has not loosened during exercise.
• Make sure the textile electrodes in the sports apparel fit snugly.
• Make sure the electrodes of the heart rate sensor strap are moistened.
• Make sure the heart rate sensor is clean. Strong electromagnetic signals can cause erratic readings. For
further information, see Precautions (page 50).
• If the erratic heart rate reading continues despite moving away from the source of disturbance, slow down
your speed and check your pulse manually. If you feel it corresponds to the high reading on the display,
you may be experiencing cardiac arrhythmia. Most cases of arrhythmia are not serious, but consult your
doctor nevertheless.
• A cardiac event may have altered your ECG waveform. In this case, consult your physician.
…Check heart rate sensor! is displayed and your training computer cannot find your heart rate signal?
• Make sure the heart rate sensor strap has not loosened during exercise.
• Make sure the electrodes of the heart rate sensor are moistened.
• Make sure the electrodes of the heart rate sensor are clean and undamaged.
If you have done all of the above-mentioned actions, and the message still appears and heart rate
measurement does not work, the battery of your heart rate sensor may be empty. For further information,
see Important Information (page 48).
...Calibration failed is displayed?*
Calibration did not succeed and you need to re-calibrate. Calibration fails if you move during the process.
Once you reach lap distance, stop running and stand still for calibration. The range of the calibration
factor during manual calibration is 0.500-1.500. If you have defined the calibration factor below or above
these values, calibration fails.
*Optional s3+ stride sensor required.
ZoneOptimizer determination fails?
• Make sure that the electrodes of the heart rate sensor are moistened.
• Make sure the heart rate sensor strap has not loosened during exercise.
• Make sure the heart rate sensor electrodes are clean and undamaged.
• Make sure you have followed the instructions carefully.
If you have done all of the above-mentioned actions, and the message still appears and heart rate
measurement does not work, the battery of your heart rate sensor may be empty. For further information,
see Important Information (page 48).
Limited International Polar Guarantee
• This guarantee does not affect the consumer’s statutory rights under applicable national or state laws in
ENGLISH
54 Important Information