Seiko 9R15, 9R65 manual How to use the tachymeter, How to measure average speed of your vehicle

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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

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Contents Spring Drive JSYGS9R1-1302Contents History of Spring Drive Spring Drive Mechanism ① Tri-synchro regulator MainspringGear train hands Water resistance How to check the caliber numberAbout the caliber number Precautions for diving 9R65, 9R15 Diver’s models Hour hand Second hand Crown Power reserve Date Indicator9R65, 9R15 Regular models 9R86, 9R84 9R66 Regular model9R66 Model with a rotating bezel Crown Power reserve indicatorHow to read the power reserve indicator Screw-lock type crownDate adjustment at the end of the month How to wind the main springTips for more accurate time setting How to set the time and dateNames of the chronograph parts and their function How to use the screw-lock type buttonBefore using the stopwatch function Screw-lock type button② If your watch has screw-lock How to use the stopwatch functionAccumulated elapsed time measurement Working Type buttons, unlock themHow to compute productivity rate per hour How to use the tachymeterHow to measure average speed of your vehicle How to set the time and calendarHow to set the calendar How to use the time difference adjustment function How to use the 24-hour handTime difference adjustment function When daylight saving time is observed How to use the bi-directional rotating bezelSelectable display mode On the rotating bezelList of time zone differences in major regions of the world How to use the rotating bezelUnidirectional rotating bezel After-sale service Diver adjusterHow to use the diver adjuster Replacement partsGuarantee Daily careMetallic band BandMagnetic resistance Magnetic influence Leather bandIf your watch has Lumibrite TroubleshootingLumibrite Reference data on the luminanceSPECIFICATIONS（Movement）

9R15, 9R65 specifications

The Seiko 9R series is a remarkable line of mechanical watches featuring Spring Drive technology, a hallmark of precision and innovation. Among its esteemed models, the 9R65 and 9R15 movements stand out for their unique characteristics and advancements.

The 9R65 movement is known for its impressive power reserve of up to 72 hours, which is significant for a watch powered by a spring-driven mechanism. This makes it extremely reliable for everyday wear, as users can take the watch off for a weekend without worrying about it stopping. One of the most notable features of the 9R65 is its smooth and continuous movement of the second hand, a signature of Spring Drive technology. Instead of ticking like traditional mechanical watches, the 9R65 provides a seamless glide, offering a visual experience that is both captivating and elegant.

On the other hand, the 9R15 movement, while sharing some similarities with the 9R65, takes the craftsmanship a step further with its chronograph function. This feature allows users to accurately measure elapsed time, making it ideal for sports enthusiasts and those who require precision timing. The 9R15 has a power reserve of approximately 60 hours, ensuring that it maintains its functionality over an extended period. Its robust design is complemented by the familiar Spring Drive mechanism, ensuring that while it offers additional functionality, it does not compromise on the smoothness and reliability typical of Seiko.

Both movements utilize Seiko’s advanced Spring Drive technology, which combines the best elements of mechanical and quartz watchmaking. This unique hybrid system allows for unparalleled accuracy, with variations of just one second per day, which is exceptional for a mechanical watch. Furthermore, the 9R series features a durable construction, incorporating high-quality materials such as stainless steel and ceramic, enhancing their longevity and resistance to wear.

In conclusion, the Seiko 9R65 and 9R15 movements exemplify the brand’s commitment to innovation, precision, and durability. Whether you prefer the minimalist elegance of the 9R65 or the added complexity of the chronograph in the 9R15, both options promise an exceptional blend of technology and artistry that showcases Seiko's prowess in horology. These movements not only cater to the demands of modern watch enthusiasts but also pay homage to the intricate traditions of watchmaking, making them a desirable choice for collectors and aficionados alike.
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