Timex W-248 - Manual (Page 17)

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3. The average heart rate for each recorded interval (shown with interval
times in Review Mode); and
4. Peak and minimum heart rates for the complete time the Heart Rate
Sensor was operating and the interval timer was running (shown as
PEAK and MINIMUM in Review Mode).
Interval Mode Notes & Tips
 When the watch accumulates information concerning time in target
heart rate zones, the information is an aggregate for the time in all
zones, not the time in zone for each individual interval.
 If all workouts are locked in Review Mode you will see the message
WORKOUTS LOCKED - UNLOCK IN REVIEW. In this instance, the watch
cannot save any data for a workout.
 With the interval timer running along with the Heart Rate Sensor you
can change the Interval Mode display by pressing HEART RATE. Choose
from:
1. Heart Rate over Interval Time (per interval);
2. Interval Time (per interval) over Heart Rate;
3. Heart Rate only; or
4. Interval Time over Interval Number/Repetition Number.
 If an interval is set to 00:00:00, the watch will automatically skip over
NOTE: To quickly change the value being set, press and hold START/SPLIT
(+) or HEART Rate (-).
To Operate the Interval Timer
1. Press MODE until INTERVAL appears.
2. Press and hold STOP/RESET/SET to clear interval data from a previous
interval workout (if necessary).
3. Press START/SPLIT to begin timing countdown for the Interval Timer
(i.e., 10, 9, 8...).
4. Press STOP/RESET/SET to stop timing when you want to take a break
or you reach the end of your workout before the intervals have
completed timing.
5. Press START/SPLIT to continue the countdown OR press and hold
STOP/RESET/SET to save and then clear the current interval workout.
Heart Rate Data When Using Interval Mode
When you operate the watch in Interval Mode with the Heart Rate Sensor,
you will accumulate heart-related data in Review Mode, including:
1. Amount of time your heart rate stays within your target heart rate zone
(shown as IN ZONE in Review Mode);
2. The average heart rate for the complete time the Heart Rate Sensor
was operating and the interval timer was running (shown as AVERAGE
in Review Mode);
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