B. Heart rate measurement mode (Int is OFF):
Two timers in use.
1.Press SIGNAL/LIGHT to turn the timer function ON or OFF.
2.Press STORE/LAP/RECOVERY to confirm your selection.
The minutes of Timer 1 are flashing.
3.Press SIGNAL/LIGHT to select the desired number of minutes.
4.Press STORE/LAP/RECOVERY to confirm your selection.
The seconds of the Timer are flashing.
5.Press SIGNAL/LIGHT to select the desired number of seconds.
6.Press STORE/LAP/RECOVERY to confirm your selection.
7.Press SET/START/STOP to set Timer 2.
ON or OFF is flashing.
8. Repeat the steps 1 to 6 to set Timer 2.
Timer 1 starts running when you start the stopwatch. You will hear one beep when the time of timer 1 is up. Timer 2 will start automatically after the beep. You will hear two beeps when the time of timer 2 is up. If you only set timer 1, it will not repeat itself. When the time is up, you will hear 6 beeps.
Timer 2 cannot be set if TIM 1 is switched OFF.
If you accidentally pass the digit you wanted to enter, press and hold SET/START/STOP to restart from 00.
Choose from the following two alternatives to continue:
1.To set Heart rate limits 1, 2 and 3 press SET/START/STOP. The third block of the graphic bar is flashing.
LIM1 is displayed.
The reading representing the upper limit 1 is flashing.
Continue from Setting the heart rate limits.
2. To return to the Time of day display press SELECT twice.
SETTING THE HEART RATE LIMITS
If you are in the Time of day display press SELECT three times.
Int is displayed.
Press SET/START/STOP until you enter the mode for setting the heart rate limit.
LIM1 is displayed.
The upper number, representing the upper limit of LIM 1, is flashing.
Heart rate limits
Heart rate limits can be set in beats per minute increments which allows you to monitor your workouts insuring the correct exercise session intensity. You can set three different target heart rate limits (LIM1, LIM2, and LIM3).
In the interval training mode the heart rate limits swap automatically according to different exercise phases 
Functions during the interval training mode.
Setting heart rate limits 1:
1. Press SIGNAL/LIGHT to select the upper limit to heart rate limits 1.
You cannot set the upper limit below the lower limit. The range for the target heart rate zone is 10 - 240.
2. Press STORE/LAP/RECOVERY to confirm your selection.
The lower reading, representing the lower limit to heart rate limits 1, is flashing.
3.Press SIGNAL/LIGHT to select the desired lower limit to heart rate limits 1.
4.Press STORE/LAP/RECOVERY to confirm your selection.
The upper reading is flashing.
5.Press SET/START/STOP to set the limits to heart rate limits 2. LIM2 is displayed.
Setting heart rate limits 2:
If OFF is flashing in the lower row of the display, press SIGNAL/LIGHT to switch heart rate limits 2 ON.
LIM2 is displayed in the upper row of the display.
The upper reading, representing the upper limit to heart rate limits 2, is flashing.
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