iwc 3713 Instrucciones De Manejo página 23

Operating the double chronograph
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Start: Start the chronograph by pressing the start-stop button.
Intermediate timing: Actuate the split-seconds stop button and this will
stop the split-seconds hand, but it will not influence time measurement.
You have now recorded an intermediate time while the standard stopwatch
continues to run. By actuating the stop button once again, you can cause
the split-seconds hand to catch up with the regular seconds stop hand
again, and your chronograph is then ready for the next intermediate time
stop.
Stop: Stop the chronograph by pressing the start-stop button again. Both
seconds hands stop simultaneously.
Resetting: Press the reset button. This will cause the chronograph hands
to fly back to the zero position. The separately stopped split-seconds hand
is not automatically reset, but must be reset by pressing the split-seconds
hand button again.
Aggregate time recording: You can add the stop times together by press-
ing the start-stop button again, instead of the reset button, after taking the
first measurement.
Seconds counter: The scale for the central seconds stop hand and the
split-seconds hand is situated at the edge of the dial.
Minutes counter: The display at 12.00 features a 30-minute scale with a
slow jumping hand. This hand makes two complete revolutions in one hour.
Hour counter: In the lower half of the dial at 6.00 is the 12-hour display,
which features short marks for the half-hours and a continuously running
hand. The hour counter is not affected if you measure an intermediate time.
Suggestion: In order to avoid placing unnecessary strain on the movement,
the split-seconds hand should not be left in a stopped position for long
periods. It is essentially only used for the measurement of intermediate
times or for recording a second finish time, and should be resynchronised
with the seconds stop hand once again after doing so.