SIGMA ONYX EASY - Manual (Page 35)

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2.4 MEASURING THE HEARTBEAT
Synchronisation of Watch and Chestbelt
Your ONYX EASY is equipped with a digitally coded chestbelt that
enables you to have interference free training.
To activate your ONYX EASY hold down any
button for two seconds. The clock changes to
active mode and you enter the training main
menu.
Note: At the start always refer to the tree
diagram shown in 2.1.
You can enter another word with up to
10 characters under the ONYX EASY font
(my name function). Please refer to Chapter
3.2 “Setting unit”.