Acumen Stopwatch Instruction Manual page 60

You can quickly quit the Recall Data Mode and go to the Chrono Mode by
pressing STP/RESET Button
If the In-Zone-Goal Countdown Timer (Optional) and the Calorie
Note:
values are zero, In-Zone-Goal Countdown Timer (Optional) or Calories will
not be displayed.
56
Average
Heart Rate
Total Time Lower related heart rate
display are optional
.
C