SUUNTO n6HR - Manual (Page 30)

30
4.4. TRANSMITTER BELT USAGE IN WATER
Heart rate measurement in water is technically demanding for the following reasons:
• Pool water with a high chlorine content and seawater may be very conductive, and
the electrodes of the transmitter may get short-circuited.
• The transmitter unit cannot detect the ECG (electrocardiogram) signals.
• Jumping into the water or strenuous muscle movement during swimming may
cause water resistance that shifts the transmitter on the body to a location where it
cannot pick up the ECG signal.
• The ECG signal strength varies depending on the individual’s tissue composition.
People have more problems with heart rate measurement in water than elsewhere.
4.5. CARE OF THE TRANSMITTER BELT
Wash the transmitter belt with mild soap and water after each use. Rinse it with clean
water, and dry thoroughly and carefully.
Store it in a cool and dry place. Never leave it wet because moisture keeps the
electrodes wet and the transmitter activated thereby shortening the battery life. Do
not bend or stretch the transmitter; this may damage the electrodes.
4.6. ELECTROMAGNETIC INTERFERENCE
Disturbances in the HR signal reception may occur near high voltage power lines,
traffic lights, overhead lines of electric railways, electric bus or tram lines, televisions,
car motors, bike computers, some motor driven exercise equipment, cellular phones
or when you walk through electric security gates.