Precautions - Polar Electro Running Sports RS100 User Manual

7. PRECAUTIONS

INTERFERENCE DURING EXERCISE
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, cell 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 tackle these problems, try
the following:
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 does not flash 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 your chest and keep the wrist unit in
this interference-free area as much as possible.
4. If the running computer still does not work with the exercise
equipment, this piece of equipment may be electrically too noisy
for wireless heart rate measurement.
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Crosstalk
When in non-coded mode the wrist unit picks up transmitter
signals within 3 feet/1 meter. Simultaneous non-coded signals
from more than one transmitter can cause an incorrect readout.
Using the Polar Running Computer in a Water Environment
Your running computer is water resistant and can be worn when
swimming. The running computer is not, however, a diving instru-
ment. To maintain water resistance, do not press the buttons of
the wrist unit under water. When measuring heart rate in water you
may experience interference for the following reasons:
• Pool water with high chlorine content and seawater are very
conductive. The electrodes of a transmitter may short-circuit,
preventing ECG signals from being detected by the transmitter.
• Jumping into water or a strenuous muscle movement during
competitive swimming may cause water resistance that shifts
the transmitter to a location on the body where it ECG signals
cannot be picked up.
• The ECG signal strength depends on the individual, and varies
depending on the individual's tissue composition.
The occurrence of problems when measuring heart rate is
considerably higher in water.
ENG