Why does the display react slowly or is coloured black?
The operating temperature may be too high or low. Your heart rate monitor
is designed for temperatures between 0 °C and 55 °C
(32 - 140 degrees F).
What should I do if the screen display is weak?
A weak display may be due to weak batteries. You should change them as
quickly as possible – battery type CR 2032 (Item No. 00342)
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7.3 Beep
The different volume settings are:
summary
1 x long:
The ONYX EASY
When entering Zone
provides information
with various beep
3 x short:
signals.
If you are below Zone
5 x short:
When you are above Zone
3 x short in interval:
Countdown has finished,
alarm rings
1 x short:
Button beep