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ENGLISH
10.1 USING A POLAR HEART RATE MONITOR IN A WATER
ENVIRONMENT
Your Polar Heart Rate Monitor is water resistant to 330 feet/100
meters. To maintain the water resistance, do not operate the
buttons of the wrist unit under water.
Heart rate measurement in a water environment is technically
demanding for the following reasons:
• Pool water with a high chlorine content and seawater are very
conductive. The electrodes of a transmitter may short-circuit,
which prevents ECG signals from being detected by the
transmitter.
• 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.
10.2 POLAR HEART RATE MONITOR AND INTERFERENCE
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
10. PRECAUTIONS
exercise equipment, cellular phones or when you walk through
electric security gates.
Crosstalk
The Polar wrist unit in non-coded mode of operation picks up
transmitter signals within 3 feet/1 meter. Non-coded signals from
more than one transmitter picked up simultaneously can cause an
incorrect readout.
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 unit as follows:
1. Remove the transmitter from your chest and use the exercise
equipment as you would normally.
2. Move the wrist unit 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 unit 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.