> HOW TO USE > Chronograph (For Cal. 9SC5)

Chronograph (For Cal. 9SC5)

A chronograph is a watch that has a stopwatch function in addition to a time display function. This watch features a stopwatch function which can measure time up to 12 hours.

Before using the stopwatch function

  1. Make sure that the mainspring is sufficiently wound.

    2. When using the stopwatch, ensure that the watch is working.

  2. Make sure that the center chronograph seconds hand is pointing at the 0 position.

    3. If it is not pointing at the 0 position, press the RESET button.

    Do not pull out the crown while the stopwatch function is operating, as doing so will stop the measurement.

Names of the chronograph parts and their function

9SC5_Chronograph_Names of the parts

  1. Center chronograph seconds hand

  2. 30-minute dial
    Chronograph minute hand

  3. 12-hour dial
    Chronograph hour hand

  4. START/STOP button

  5. RESET button

The orientation and design of the display may vary depending on the model.

How to use the chronograph (stopwatch) function

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

  2. Start measuring time.

    3. Upon pressing of the START/STOP button, the chronograph hands start moving and the stopwatch starts measuring time.

    9SC5_Chronograph_Set Time-1

  3. Stop measuring time.

    4. At the moment you want to finish the measurement, press the START/STOP button again to stop the chronograph hands.

    【Ex.】

    6 hours 20 minutes 10 seconds and 8

    The chronograph minute hand on the 30-minute dial completes two full rotations in an hour.

    To read the 30-minute dial, see the display of the 12-hour dial as a rough indication.

    9SC5_Chronograph_Set Time-2

  4. Reset the chronograph hands.

    5. After stopping the chronograph hands, press the RESET button to return all the chronograph hands to the 0 position.

    9SC5_Chronograph_Set Time-3

Accumulated elapsed time measurement

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

  2. Start measuring time.

    3. Upon pressing of the START/STOP button, the chronograph hands start moving and the stopwatch starts measuring time.

    9SC5_Total_Set Time-1

  3. Stop measuring time.

    4. At the moment you want to stop the first measurement, press the START/STOP button again to stop the chronograph hands. The measured time will be displayed.

    9SC5_Total_Set Time-2

  4. Restart measuring time.

    5. Upon pressing of the START/STOP button again, the chronograph hands restart moving from the position they had previously stopped.

    9SC5_Total_Set Time-3

  5. Stop measuring time.

    6. At the moment you want to stop the second measurement, press the START/STOP button again to stop the chronograph hands. The measured time displayed at this time will be the total of the first and the second measurements (accumulated elapsed time).

    9SC5_Total_Set Time-4

  6. Repeat measuring time cumulatively.

    7. Step Num5 and Num6 above can be repeated as required. As you repeat pressing of the START/STOP button, the measurement will stop and restart and each elapsed time measurement will be accumulated.

  7. Reset the chronograph hands.

    8. After stopping the chronograph hands, press the RESET button to return all the chronograph hands to the 0 position.

    9SC5_Total_Set Time-5

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

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

  2. When 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 seconds hand is pointing.

9SC5_TACHYMETER-1 + 9R96_TACHYMETER-1

START/STOP button

START/STOP button

1 km

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

9SC5_TACHYMETER-1 V + 9R96_TACHYMETER-1 V

START/STOP button

START/STOP 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

  1. At 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 seconds hand is pointing.

9SC5_TACHYMETER-2 + 9R96_TACHYMETER-2

START/STOP button

START/STOP button

1 unit

The measured result shows that the average productivity rate is 300 units/h.

9SC5_TACHYMETER-2 V + 9R96_TACHYMETER-2 V

START/STOP button

START/STOP button

1 unit

The measured result shows that the average productivity rate is 300 units/h.