Seiko SSC721 Owner Manual - Page 11

Rotating Bezel, Tachymeter

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English ROTATING BEZEL (for models with rotating bezel) The rotating bezel can show the elapsed time up to 60 minutes. 1. Turn the rotating bezel to align its " " mark with the minute hand. * The rotating bezel rotates with clicks. With each click, it turns half a minute. 2. To know the elapsed time, read the number on the rotating bezel that the minute hand points to. Example: Start(10:10 AM) " " mark Minute hand "30" on rotating bezel 30 minutes have elapsed. 20 English TACHYMETER (for models with tachymeter scale on the dial) To measure the hourly average speed of a vehicle 1 Use the stopwatch to determine how many seconds it takes to go 1 km or 1 mile. 2 Tachymeter scale indicated by the 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 l 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 the 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 21

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21
English
English
20
ROTATING BEZEL
(for models with rotating bezel)
The rotating bezel can show the elapsed time up to 60 minutes.
Start(10:10 AM) "
" mark
30 minutes have elapsed.
"30" on rotating bezel
1.
Turn the rotating bezel to align its "
" mark with the minute hand.
* The rotating bezel rotates with clicks.
With each click, it turns half a minute.
2. To know the elapsed time, read the number on the rotating bezel that the
minute hand points to.
Minute hand
Example:
TACHYMETER
(for models with tachymeter scale on the dial)
l
Tachymeter scale can be used only when the time required is less than 60 seconds.
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.
Tachymeter scale indicated by
the 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
Ex. 2:
If the measuring distance is extended to 2 km or miles or shortened to 0.5 km or
miles and the 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
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