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2. Check that you have kept the transmitter clean.
3. Check that you are not near other people that have heart rate monitors,
high voltage power lines, televisions, mobile phones or other sources of
electromagnetic disturbance.
4. Have you had a cardiac event which may have altered your EKG
waveform? In this case consult your physician.
...heart symbol flashes irregularly?
1. Check that the wrist receiver is not further than 3 feet/ 1 meter 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
3 feet/ 1 meter.
5. Cardiac arrhythmia may cause irregular readings. In this case consult
your physician.
...other person with heart rate monitor is causing interference?
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 receiver up to your chest near
the transmitter’s Polar logo. The receiver 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 receiver by pressing the OK button
twice, after which the Time of Day display appears. The first sign of a
discharged battery is the battery symbol on the display. Also the digits fade
when the backlight is used. Have the batteries checked.
...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.
If you don’t press any button after reset within one minute the wrist
receiver returns to the Time of Day display.
2. Press any of the buttons once. Time of day is displayed.
...the battery of the wrist receiver 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 receiver for water resistance after
battery replacement and make a full periodic check of the complete Polar
Heart rate monitor.
S720i manual USA A .pm6 12/2/02, 10:1196-97