The CS600 cycling computer is water resistant. However, heart rate measurement does not work in water due to the 2.4GHz W.I.N.D frequency. You can use the cycling computer under water as a watch but it is not a diving instrument. To maintain water resistance, do not press the buttons of the cycling computer under water.
General Facts when using any Polar Heart Rate Monitor in a Water Enviroment
Polar Heart Rate Monitors are water resistant to 10, 20, 30, 50 or 100 metres depending on the model. To maintain the water resistance, do not operate the buttons of the Polar wrist receiver under water. Heart rate measurement in a water environment is technically demanding for the following reasons:
Pool water with a high chlorine content and seawater may be very conductive and the electrodes of a transmitter may get short circuited and ECG signals cannot be detected 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 the ECG signal.
The ECG signal strength varies depending on the individual's tissue composition. The percentage of people who have problems in heart rate measuring is considerably higher in a water environment than in other use
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