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22
To measure the hourly average speed of a vehicle
Use the stopwatch to determine
how many seconds it takes to go
1 km or 1 mile.
1
Tachymeter scale indicated by
Second hand gives the average
speed per hour.
2
Ex. 1Ex. 1
“80” (tachymeter scale figure) x 1 (km or mile)
= 80 km/h or mph
HOW TO USE THE TACHYMETER
(for models with tachymeter scale on the dial)
➚
Tachymeter
scale: “80”
Second hand:
45 seconds
* Tachymeter scale can be used only when the time required is less than 60 seconds. If necessary,
shorten the measuring distance.