SIGMA PC 3.11 - Manual (Page 8)

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2.2 DISPlAYING ThE hEArT rATE frEquENCY
2.3 TrAINING TImE (STArT, STOP, rESET)
The PC 3.11 is in sleep mode.
The chest belt is attached.
Press the top button to activate training mode.
The current heart rate appears in the display.
The PC 3.11 is in sleep mode.
The chest belt is attached.