Polar Electro F55 User Manual page 46

10. PRECAUTIONS
10.1 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, 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 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 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 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.
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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 Heart Rate Monitor in a Water Environment
Your Polar heart rate monitor is water resistant and can be used
when swimming. The fitness heart rate monitor is not, however, a
diving instrument. To maintain the water resistance, do not press
the buttons of the wrist unit under water.
Users measuring their heart rate in water may experience
interference 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 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 signals.
• The ECG signal strength depends on the individual and also
varies depending on an individual's tissue composition.
The percentage of people who have problems in heart rate
measuring is considerably higher in water than in other use.
10.2 MINIMIZING POSSIBLE RISKS WHEN
EXERCISING
Exercise may include some risk. Before beginning a regular
exercise program, it is recommended that you answer the following
questions concerning your health status. If you answer yes to any
of these questions, we recommend that you consult a doctor before
starting any training program.
• Have you been physically inactive for the past 5 years?
• Do you have high blood pressure or high blood cholesterol?
• Do you have symptoms of any disease?
• Are you taking any blood pressure or heart medication?
• Do you have a history of breathing problems?
• Are you recovering from a serious illness or medical treatment?
• Do you use a pacemaker or another implanted electronic device?
• Do you smoke?
• Are you pregnant?
Note that in addition to exercise intensity, medications for heart,
blood pressure, psychological conditions, asthma, breathing etc.
as well as some energy drinks, alcohol and nicotine may affect your
heart rate.
It is important to be sensitive to your body's responses during
exercise. If you feel unexpected pain or excessive fatigue when
exercising, it is recommended that you stop the exercise or continue
at a lighter intensity.
Notice to individuals with pacemakers, defibrillators or other
implanted electronic devices. Individuals who have a pacemaker
use the Polar fitness heart rate monitor at their own risk. Before
starting use, we always recommend a maximal exercise stress test
under a doctor's supervision. The test is to ensure the safety and
reliability of the simultaneous use of the pacemaker and the Polar
fitness heart rate monitor.
If you are allergic to any substance that comes into contact with
your skin or if you suspect an allergic reaction due to using the
product, check the listed materials on Technical Specifications
chapter. To avoid any skin reaction to the transmitter, wear it over a
shirt. However, moisten the shirt well under the electrodes to ensure
flawless operation.
The combined impact of moisture and intense abrasion may cause a
black color to come off the transmitter's surface, which might stain
light-colored clothes especially.
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