Polar Electro S625X User Manual page 110

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 the wrist unit is not further than 1 meter/ 3 feet from the
transmitter.
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
1 meter/ 3 feet.
5. Cardiac arrhythmia may cause irregular readings. In this case consult
your physician.
...other person with heart rate monitor is causing interference?
Your training partner may have exactly the same code as you. In this case
proceed as follows: Keep a distance from your training partner and
continue your training session normally.
Or
1. Take the transmitter off your chest for 30 seconds. Keep a distance from
your training partner.
2. Put the transmitter back and bring the wrist unit up to your chest near
the transmitter's Polar logo. The wrist unit starts looking for a heart rate
signal again. Continue your training session normally.
...heart rate reading becomes erratic or extremely high?
You may have come within range of strong electromagnetic signals which
cause erratic readings. Check your surroundings and move further away
from the source of disturbance.
...the display is blank or fading?
If the display is blank, activate the wrist unit by pressing the OK button
twice, after which the Time of day display appears. The first sign of a
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