SIGMA ONYX FIT - Manual (Page 45)

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2.4 MEASURING THE HEARTBEAT
Before starting to train you have to synchronize
the chest belt with the watch once. Select any
training and press the Navigation button
k ENTER.
The synchronization starts automatically and
takes just a few seconds.
After successful synchronization your ONYX FIT
gives a short confirmation with “Sync ok”.
Note: If you do not see this indication on your
watch synchronization has already been
completed successfully.
After your ONYX FIT has successfully synchro-
nized with your chest belt you can start training
by pressing k START.
Note: please refer to Chapter 7.4 “Trouble-
shooting” for possible problems with synchro-
nization.