G. PRECAUTIONS
Using the Polar heart rate monitor in a water environment
Your Polar heart rate monitor is water resistant to 30 meters/ 100 feet. To maintain the water resistance, do not operate 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 Polar transmitter may short circuit, which prevents the transmitter unit from detecting ECG signals.
•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 an ECG signal.
•ECG signal strength is individual and also varies depending on an individual’s tissue composition. The percentage of people who have problems measuring their heart rate is considerably higher in water than in other environments.
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