Seiko 9R15, 9R65 How to use the tachymeter, HOW TO USE For Cal. 9R86, 9R66, How to set the time

How to use the tachymeter

The tachymeter can be used to measure average speed or productivity rate per unit time.

○How to measure average speed of your vehicle

【Ex.】Measure the time taken by your vehicle to go one kilometer

①When the car passes the start line, press the START/STOP button to

start the stopwatch.

②When the car crosses the 1-kilometer mark, press the START/STOP button to stop the stopwatch. Read the number on the tachymeter scale to which the center stopwatch second hand is pointing.

START/STOP		START/STOP
button		button
	1 km

The measured result shows that the average speed of the vehicle is 80 km/h.

○ How to compute productivity rate per hour

【Ex.】Measure the time required to produce one unit

①At the start of production, press the START/STOP button to start the stopwatch.

② When the production is completed, press the START/STOP button to

stop the stopwatch. Read the number on the tachymeter scale to

which the center stopwatch second hand is pointing.

HOW TO USE (For Cal. 9R86, 9R66)

For the instructions on how to use the chronograph (stopwatch function) of Cal. 9R86, refer to“Chronograph”on page 20.

How to wind the main spring

○This watch is an automatic winding type (with manual winding function).

○The mainspring can be sufficiently wound automatically by natural movement of the arm while it is worn on the wrist. In addition, the mainspring can be wound by turning the crown. Please see the power reserve indicator to check the level of the remaining power.

⇒“How to read the power reserve indicator”page 17.

○When starting to use a stopped watch, it is recommended that you turn the crown to wind the mainspring. To wind the mainspring, turn the crown at the normal position clockwise (12 o'clock direction) slowly. If you turn the crown counterclockwise (6 o'clock direction), it will turn free. Five full rotations of the crown will provide the power to run the watch for approximately ten hours.

○If you wear the watch for twelve hours per day consecutively for 3 to 5 days, the watch will be fully wound.

※Under a low-temperature condition (below 0ºC), always keep at least one-sixth of the watch power shown by the power reserve indicator.

How to set the time and calendar

○To set the time and calendar, set the 24-hour hand and minute hand first, and then set the hour hand and calendar.

○When setting the time, make sure that the mainspring is sufficiently wound.

How to set the time

①Make sure that the mainspring is sufficiently wound and the watch is working.

※When setting the date and time, ensure that the watch is working.

English

START/STOP		START/STOP
button		button
	1 unit

The measured result shows that the average productivity rate

is 300 units/h.

24Chronograph (For Cal. 9R86, 9R84)

②Unlock the crown.

⇒"How to use the screw-lock type crown" page 16.

③Pull out the crown to the second click when the second hand (or the small second hand) is pointing at the "0" second position. The second hand (or the small second hand) will stop on the spot.

22
20	21
19
18
17
16	15
	14

23 1

	GMT
13	11
	12

2
3	4
	5
	6
6	4
	8
6
10	Pull out the

crown to the second click.

25