Acumen EON-2028HS - Manual (Page 45)

LAP
LAP
Select Target Zone (TZ) Mode
Freezes for two seconds
From the Analog Time Display, press MODE/NXT Button D two times to
enter the Select TZ Mode. There are three Heart Rate Target Zones in the
watch. In this mode, you can select Heart Rate Training Zone, Set Target Zone
Limit, Out of Target Zone alarm, and Heart Rate Sampling Interval Time.
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Part II