AVI-8 AV-4064, Инструкция по эксплуатации

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Note: The tachymeter indications may appear
on dial ring, rather than on the outer bezel
(depending on model).
As shown in the illustration, it takes the vehicle
45 seconds to travel 1 km so the approximate
average speed is 80 kph (50 mph).
STOPWATCH
SECOND HAND
45 SECONDS ELAPSED
THE AVERAGE SPEED IS 80 KPH
The most common use of a tachymeter is for
measuring the approximate speed of a vehicle
over a known distance.
(E.g.) Based on how many seconds it takes a
vehicle to travel 1 km or 1 mile (the available
measuring range is up to 60 seconds), the
average speed within the distance can be
calculated.
1. Start the chronograph when the vehicles
commence travel.
2. After the vehicle has travelled 1 km/1 mile,
stop the chronograph.
The approximate average speed within the
distance can be determined by observing the
present position of the stopwatch second hand
and reading the outer bezel.
USING THE TACHYMETER
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