SIGMA ONYX PRO - Manual (Page 97)

97
GB
7.4 FAQ
What happens if I remove the chest belt during training?
The watch will no longer display a signal, the screen will
indicate “0” – after a short period of time the ONYX PRO
goes into sleep mode.
Do SIGMA heart rate monitors switch off completely?
No – in sleep mode only the time and date are displayed so you
can use the heart rate monitor as a normal watch. In this state
the ONYX PRO uses only very little power.
Why does the display react slowly or is colored 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 - 131 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)