SIGMA ONYX EASY - Manual (Page 50)

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7.2 FAQ
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)
The ONYX EASY provides information with various beep signals.
The different volume settings are:
1 x long:
When entering Zone
3 x short:
If you are below Zone
5 x short:
When you are above Zone
7.3 BEEP SUMMARY