Polar CS300 User Manual

See the chapter Care and Maintenance for further instructions. 

Press and hold   until the time is displayed.

Reset the wrist unit by pressing all the buttons simultaneously for two 

seconds. 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  .

Burnt calories are calculated only when you are wearing the transmitter.

Consult the chapter Precautions.

•  Make sure the wrist unit is no further than 1 m / 3 ft from

  the transmitter.

•  Make sure the transmitter belt has not loosened during exercise.

•  Make sure the textile electrodes in sports apparel fit snugly.

•  Make sure that the electrodes of the transmitter / sports apparel are

  moistened. 

•  Make sure the transmitter / electrodes in the sports apparel are clean

  and undamaged.

•  Make sure that there is no other heart rate transmitter within

  1 m / 3 ft.

•  Strong electromagnetic signals can cause erratic readings.

  See Precautions. 

•  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.

•  If the heart rate measurement does not work with the sports apparel,

  try measuring with WearLink strap. If your heart rate can be found  

  with the strap, the problem is most probably in the apparel. Please  

  contact the apparel retailer/manufacturer.

•  If you have done all the above mentioned actions, and heart rate

  measurement does not work, the battery of your transmitter may be  

  empty. For further information see chapter Care and maintenance.