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RATCHET BEZEL (Available on select models only)
The rotating ratchet bezel, available on select models only, was
designed to enable divers to time dives, but can be used to measure
any elapsed time period. The turning bezel has grooves to make it
easy to operate. To measure elapsed time, simply turn the bezel
counter-clockwise until the zero mark (also the 60 mark) is opposite
the minute hand. From this moment on, the position of the minute
hand in relation to the zero mark on the bezel will indicate the total
number of minutes that have elapsed.
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TO MEASURE SPEEDS OF TRAVEL:
1. Assume you wish to measure a car’s average speed over a one
mile course. Start the stopwatch when the car passes the starting
point. Stop it when the car passes the one-mile or one-kilometer
mark.
2. Read the corresponding number on the outer tachymeter ring.
Let’s say the car covered one mile or one kilometer in 45 seconds.
The tachymeter number next to the 45-second mark is 80 – so the
car averaged 80 miles per hour, or 80 kilometers per hour, over
that measured course.
TO DETERMINE UNITS PER HOUR:
1. Start the stopwatch, count a convenient number of units and then
stop the watch. Say, for example, that you are counting units of
production and you stop the count at 10 units, and the sweep
seconds hand reads 45 seconds.
2. The tachymeter number next to the 45-second mark is 80. Multiply
10 times 80 to get the number of units produced per hour: 800.
NOTE: The tachymeter numbers offer you a mathematical shortcut.
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