RADO Chronograph_DiaMaster_mini - Manual (Page 5)

Tachymeter scale
The basic unit is a distance of 1 kilometer or
1 mile. The time taken to travel this distance
gives the average speed in km/h or mph.
Start
Stop
The speed can be read off from
the tachymeter scale.
Reset to zero
All chronograph hands are reset to zero and
the chronograph is ready for the next time
measurement.
23 60
20 40
30
10 20 4
0
2
6
8
23 60
20 40
30
10 20 4
0
2
6
8
23 60
20 40
30
10 20
4
0
2
6
8