Seiko 7L22 Manual - Page 11

TACHYMETER, for models with tachymeter scale

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English TACHYMETER (for models with tachymeter scale) To measure the hourly average speed of a vehicle 300 250 400 1 Use the stopwatch to determine how many seconds it takes to go 1 km or 1 mile. 2 Tachymeter scale indicated by STOPWATCH second hand gives the average speed per hour. Ex. 1 STOPWATCH second hand: 40 seconds Tachymeter scale: "90" 80 75 90 7 100 65 0 60 TACHYMETER 500 140 200 180 16 0 120 "90" (tachymeter scale figure) x 1 (km or mile) = 90 km/h or mph * 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 STOPWATCH second hand indicates "90" on tachymeter scale: "90" (tachymeter scale figure) x 2 (km or mile) = 180 km/h or mph "90" (tachymeter scale figure) x 0.5 (km or mile) = 45 km/h or mph 11

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TACHYMETER
(for models with tachymeter scale)
To measure the hourly average speed of a vehicle
*
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 STOPWATCH second hand indicates “90” on tachymeter scale:
“90” (tachymeter scale figure) x 2 (km or mile) = 180 km/h or mph
“90” (tachymeter scale figure) x 0.5 (km or mile) = 45 km/h or mph
Use the stopwatch to
determine how many
seconds it takes to go 1 km or
1 mile.
Tachymeter scale indicated
by STOPWATCH second hand
gives the average speed per
hour.
Ex. 1
STOPWATCH
second hand:
40 seconds
Tachymeter scale:
“90”
“90” (tachymeter scale figure) x 1 (km or mile)
= 90 km/h or mph
1
2