English
7
1
U s e t h e c h r o n o g r a p h t o
determine how many seconds it
takes to go 1 km or 1 mile.
2
Locate the second marker on the
main dial that corresponds to the
measured seconds, and the
tachymeter scale it indicates gives
the average speed per hour.
TACHYMETER
[for models with tachymeter scale on the dial]
To measure the hourly average speed of a vehicle
▲
Ex. 1
“90” (tachymeter scale figure) x
1 (km or mile) = 90 km/h or mph
Tachymeter
scale: “90”
Tachymeter scale can be used only when the time required is less than 60 seconds.
Ex. 2: If the measuring distance is extended to 2 km or miles or shortened to
0.5 km or miles and CHRONOGRAPH second hand indicates “90” on
CHRONOGRAPH
second hand:
40 seconds