To measure the hourly average speed
of a vehicle
• Use the stopwatch to determine how
many seconds it takes to go one kilo-
meter (or one mile). The tachymeter
scale indicated by the stopwatch second
hand gives the average speed per hour.
• Please note that the tachymeter scale
can be used only when the time
required is less than 60 second. If it
exceeds 60 seconds, shorten the meas-
uring distance (Refer to “Ex 2” below).
Ex. 1:
If it takes 40 seconds to go one kilo-
meter (or one mile), the stopwatch
HOW TO USE THE TACHYMETER
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