English
7
1 Use the stopwatch to 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
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