You can take additional lap readings by pressing S3 repeatedly. 
If you take a another lap reading before the ten second delay, 
the new lap and split times are still measured and displayed. 
Each time you take a lap reading and a new lap starts, the legend at the bottom of the screen changes
To Stop, Pause: During lap timing, you can end your segment or take “time out” on the current lap by pressing S2. This will stop your chronograph, but it will not end your chance to take lap readings for that segment. To restart the chronograph from where you left off, press S3.
SECTION 7 – HOW TO STORE, DELETE AND RECALL
LAP AND SEGMENT TIMES
To Store, Delete Times: When you press S2 at the end of a 
segment (remember that you can stop temporarily within a 
lap), you can store the results of that segment by pressing S2 
again. The screen will show
the button for 2 more seconds, the segment, with as many laps as you have timed, will be stored.
If you press S2 again, the display will prompt you to
more than one segment and you continue to hold S2,
NOTE: If you decide not to retain the information from a
In Chrono mode you can determine the status of available lap memory by pressing S4. If your current segment exceeds the amount of free memory (100 laps maximum), you will not be able to store it and pressing S2 will bring up the
To Recall Times: In Chrono mode only, you can recall stored 
segment results. Press S1 to recall the recorded times for the 
most recent segment. First, the day and date of the segment, 
the total elapsed time, and the segment number will de 
displayed. Pressing S1 repeatedly will bring up the average lap 
time, the best lap time, and the individual lap times in 
ascending order for that segment. The next press of S1 brings you back to the segment total.
If you are recalling a segment currently being timed (and not stored), the lap times will be displayed in descending order for review.
While in Chrono Recall mode, select other segments by 
pressing S5. Each press reduces the segment number by one, 
and after 
(highest numbered) segment. At any time, you can delete the 
most recently stored segment by pressing and holding S2. 
While in Chrono Recall mode, S2 and S3 will operate for an 
active chronograph as described earlier (you can take lap times, 
RCL
or pause/stop the chronograph) and the display will 
automatically change from Chrono Recall mode to Chrono 
mode. Press S4 to exit Chrono Recall mode, or, if you do nothing while in Chrono Recall mode, the display will switch to Chrono mode after 15 seconds.
SECTION 8 – USING THE COUNTDOWN TIMER
The countdown timer can be used to enter one or more (up to 9) intervals of up to 99 hours, 59 minutes and 59 seconds, to allow a pattern of intervals to be repeated
For example, you can set a single interval of a selected length to let you know by the signal that the time has elapsed. You can set a series of intervals to count down to the beginning of an event, with the chronograph set to start after the last interval. You can set multiple or continuous repetitions of target training intervals during which you want to perform some exercise or reach some distance mark for
From Time/Calendar mode, press S5 twice to enter Timer mode. TIMER appears on the display for 2 seconds and then a display showing the number of repetitions and intervals 
programmed, if any.
The first time you enter Timer mode, the screen will show 
REPS 1 (repetition 1), 0:00.00 (meaning that no time has been 
set for any interval), and the legend INT 0/0 (interval number 0 of 0 – which will change as you enter your choices).
Press S4 to enter Timer Set mode. You’ll see SET NO. OF 
REPS and the flashing number 1. You can increase the number 
of repetitions by pressing S1, and decrease the number by 
pressing S2. This sets the number of times the interval pattern (which you will set next) will be repeated. You can set the number of repetitions from 1 to 9, or C for continuous. If you leave the number of repetitions at one, CDS (for Countdown Stop) will appear on the flag line of the display. CDR (for Countdown Repeat) appears if you set more than one repetition.
Press S3 (forward) or S5 (reverse) to select the next choice. 
The display will show 
flashing. If you wish to have the chronograph automatically 
start after the last repetition of countdown intervals, press S1 or S2. The CDC (Countdown Chrono) flag will appear upon exit from Timer Set mode. NOTE: If you selected C for continuous countdowns previously, this option will not appear as the countdowns will never end to allow the starting of the chronograph. Also note that this option cannot be used if the chronograph is running: the display will read CHRONO IN USE to inform you. The chronograph must be reset before going into Timer Set mode.
The next screen to appear when you press S3 or S5 will read 
INT 1 0:00.00 SET INT, allowing you to set the first interval. 
The 1 will be flashing, if you have more than one interval to set, 
you can press S1 to increase the interval number (or S2 to decrease it) so as to change any interval setting.
Press S3 and the HOURS will begin flashing. Set the hours by 
pressing S1 to increase the setting or S2 to decrease the 
setting (holding down the button will advance/reverse the digits 
rapidly). It is often faster to reach your setting by decreasing the digits than by increasing them (for example, from 0 hours to 75).
Press S3 to select MINUTES (they will begin flashing) and set them in the same manner. Press S3 one more time and SECONDS will flash, so you can set them. Note that you can reverse the order in which the digits flash by using the S5 button (for example, to move from SECONDS back to MINUTES).