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USING A POLAR HEART RATE
MONITOR IN A WATER
ENVIRONMENT
Your Polar Heart Rate Monitor is water resistant to 30
metres / 100 feet. To maintain the water resistance, do not
operate the buttons of the wrist receiver 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
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.
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 exercise equipment, cellular phones or when
you walk through electric security gates.
CROSSTALK
The Polar wrist receiver in non-coded mode of operation
picks up transmitter signals within 1 metre / 3 feet. 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 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.
MINIMISING POSSIBLE RISKS IN
EXERCISING WITH A HEART RATE
MONITOR
Exercise may include some risk, especially for those who
have been sedentary. To minimise possible risks consider
the following advice:
PRECAUTIONS
M52 man GBR/D 5/1/01, 9:1146-47