CA active PASSION, Руководство пользователя

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After connecting your watch to the APP, you can set the
maximum heart rate warning value and synchronize it to
your watch. Then, when the heart rate value on your watch
reaches the maximum heart rate value, your watch will vi-
brate to give a prompt and at the same time, the heart
rate value will flash, telling you to stop intensive exercise. If
you are not clear of your maximum or minimum heart rate,
please consult your doctor before taking exercise.
Before making a measurement, ensure that there is no
contamination at the bottom of the heart rate sensor. Such
factors as skin color, thick hair, tattoo, and scar may affect
the detection result.
This heart rate detector works according to the PPG meas-
urement principle. Therefore, its precision may vary with
the physiological factors (blood circulation, blood pressure,
skin conditions, blood vessel location and density) which
affect light absorption and reflection. When the measured
heart rate value is very great or very small, the measure-
ment value may be incorrect and you need to make anoth-
er measurement.
Long-time measurement may cause the watch to get hot.
If this makes you uncomfortable, you can take the watch
off your wrist and wear it again after it has cooled down.
You are recommended to make measurement when it is
warm because cold weather may affect the measurement
result.