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Electromagnetic interference
Disturbances may occur near high voltage power lines, traffic lights,
overhead lines of electric railways, electric bus lines or trams, televisions,
car motors, bike computers, some motor driven exercise equipment, cellular
phones or when you walk through electric security gates.
Exercise equipment
Several pieces of exercise equipment with electronic or electrical
components such as LED displays, motors and electrical brakes may cause
interfering stray signals. To try to tackle these problems, relocate the Polar
wrist receiver as follows:
1. Remove the transmitter from your chest and use the exercise equipment
as you would normally.
2. Move the wrist receiver around until you find an area in which it
displays no stray reading or flashing of the heart symbol. Interference is
often worst right in front of the display panel of the equipment, while
the left or right side of the display is relatively free of disturbance.
3. Put the transmitter back on the chest and keep the wrist receiver in this
interference-free area as far as it is possible.
4. If the Polar heart rate monitor still does not work with the exercise
equipment, this piece of equipment may be electrically too noisy for
wireless heart rate measurement.
Polar heart rate monitor and interference
H 85
Using the Polar S510 in a water environment
Your Polar S510 is water resistant to 20 metres/ 60 feet.
Heart rate measurement in a water environment is technically demanding
for the following reasons:
• Pool water with a high chlorine content and seawater may be very
conductive and the electrodes of Polar transmitter may get short
circuited and ECG signals cannot be detected by the transmitter unit.
• Jumping into the water or strenuous muscle movement during
competitive swimming may cause water resistance that shifts the
transmitter on the body to a location where it is not possible to pick up
ECG signal.
• The ECG signal strength varies depending on the individual’s tissue
composition and the percentage of people who have problems in
heart rate measuring is considerably higher in a water environment
than in other use.
H. PRECAUTIONS
H 84
H 85H 84
Manual S510 GBR C.pm6 8.3.2001, 12:4484-85