Timex Intelligent Quartz Manual page 226

2. To start, press button A (START/STOP). The 4th center
hand displays the seconds counting up; the lower
hand shows the minutes, counting up in a 30-minute
scale and the upper hand shows the hour counting up
on the 4-hour scale. Each time the lower hand reaches
the 30 minute mark, it will return to the zero position
to begin the next 30 minute period, while the upper
hand will continue to advance through the 4-hour
scale. (Please note: button C is disabled while the
chronograph is in operation).
3. To take a split time, press button B (SPLIT/RESET).
The upper, lower, and 4th center hands will hold their
positions for you to note the split (lap) time. The chro-
nograph is still maintaining the timing sequence while
the hands are stopped. To release the hands, press
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