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PRECAUTIONS
THE POLAR HEART RATE MONITOR IN A WATER ENVIRONMENT
Polar Heart Rate Monitors are water resistant to 20 metres. To maintain this
water resistance, do not operate the buttons of the Polar 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 a transmitter may get short circuited,
causing the ECG signals not to 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
the ECG signal.
• ECG signal strength varies depending on an individual’s tissue
composition. The percentage of people who have problems with heart
rate measuring is considerably higher in a water environment than in
other cases.
THE POLAR HEART RATE MONITOR AND INTERFERENCE
ELECTROMAGNETIC INTERFERENCE
Interference 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 electronic security gates.
CROSSTALK
The Polar wrist receiver in non-coded mode of operation picks up
transmitters signals within 1 metre / 3 feet. Therefore, make sure no other
transmitter is within that range. 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