Tachymeter (for models with tachymeter scale), English – Seiko CAL. 7L22 User Manual
Page 11

English
11
60
TACHYM
ETER
50
0
40
0
30
0
2
5
0
2
0
0
18
0
16
0
140
12
0
10
0
90
8
0
75
70
65
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
U s e t h e s t o p w a t c h t o
d e t e r m i n e h o w m a n y
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
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