POLAR S610i - Manual (Page 75)

H. PRECAUTIONS
H 73
Using the Polar Heart Rate Monitor in a Water Environment
Your Polar heart rate monitor is water resistant to 160 feet/ 50 meters. To
maintain the water resistance, do not operate the buttons of the wrist
receiver under water.
Users measuring heart rate in a water environment may experience
interference for the following reasons:
•
Pool water with a high chlorine content and seawater are very
conductive. The electrodes of a Polar transmitter may becoome short
circuited which prevents EKG signals from detection 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.