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MEASUREMENT
SCALES
Measurement scales are scales that establish a relation
between elapsed time and another variable. The
desired information in terms of speed (tachymeter),
distance (telemeter) or units (pulsometer, productivity
meters) is read off between the central seconds hand
of the chronograph and the corresponding scale, over
a maximum duration of 60 seconds. For the telemeter,
it is possible to make use of the minutes counter by
adding 20 km to the distance indicated by the central
seconds hand for each minute elapsed.
TACHYMETER
SCALES
Only for:
AL-725xARx - AL-727x4NHx
TACHYMETER SCALE USE
Example 1:
calculating the speed of a car.
Measure the time it takes the car to cover a distance of
1 km. Read off the speed indicated by the central chro-
nograph seconds hand on the tachymetric scale. In our
example, the car is travelling at 90 km/h.
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