Timex W236 - Manual (Page 14)

TACHYMETER FUNCTION
The tachymeter will only determine speeds greater
than 60 units per hour using this method; slower
speeds can be measured by decreasing the unit of
measurement. The function performed by a
tachymeter is independent of the unit of distance
(e.g. statute miles, nautical miles, kilometers, meters
etc.) as long as the same unit of length is used for all
calculations.
1) Determine the start and finish markers for your
pre-determined distance.
2) Start the chronograph once the target for speed
measurement passes the start marker.
3) Stop the chronograph once the target for speed
measurement passes the finish marker.
4) The chronograph second hand is compared to the
tachymeter markings to determine the target’s
speed.
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ENGLISH
*Do not push crown to normal position while the
chronograph second hand returns to zero position.
It stops on the way when crown is returned to
normal position and its position is recognized as
zero position.
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T1003-01_W236_EN_analoglayout_4 3/10/10 10:02 AM Page 20