Tachymeter - Citizen AN0 Series Instruction Manual

■ Tachymeter

Chronograph
second hand
The tachymeter is the device which
measures the speed of an automobile.
Knowing in how many seconds the car
covers a distance of 1km, the meter
can measure the approximate average
speed per hour during a journey (up to
the maximum measurable range of 60
seconds.)
If the chronograph is started at the same
time as measurement, and stopped after
1km, the average speed per hour can be
determined according to the position of the
second hand.
If the car covers the distance of 1km in 45
seconds, the average hourly speed during
the journey will be about 80km.
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