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Problem
68
Possible cause
Transmittance of light
through the skin can be
influenced by stark contrast
in pigmentation of the skin
(e.g. due to a pattern in a
tattoo). This could result in
inaccurate optical heart rate
measurement.
Solution
Try re-positioning the watch at bit
higher up on the wrist or on the
other wrist (if you place the watch
on the other arm, do not forget
to change the watch placement
setting in the app).
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