Sigma onyx FIT Mode D'emploi page 72

During synchronization
two or more chest belts
were found close by.
Move away and press
SYNC again to start
synchronization.
PAGE 34
Important If no heart rate is shown on the display, this may be due
note to the following reasons:
k The belt with the heart rate transmitter is not worn
correctly
k The sensors (electrodes) on the heart rate transmitter
are dirty or dry
k Interference from electrical sources (high voltage lines,
railways etc.)
k Transmitter battery (CR 2032) is dead (Item no. 00342)
Before starting to train, consult your doctor to avoid risks to
your health. This applies in particular if you have cardio-vascular
problems.
7.5 Changing the
battery/water-
proofing and
warranty