How to use


YF20

Using the watch

Using the timer

The timer on this watch can measure up to 60 minutes in 1-minute increments.

!

Countdown time of the timer must be changed on the watch.

  1. Press and hold the middle right button B of the watch.
  2. The hands of the watch line horizontally and the menu appears on the display.

    !

    The indication automatically returns to normal indication in 3 minutes without executing any operation.

  3. Press and release the lower right button A or the upper right button C of the watch repeatedly to indicate [Timer].
  4. !

    When “<”, “>”, “∧” or “∨” is indicated on the display, you can switch indication using the lower right button A or the upper right button C of the watch.

  5. Press the middle right button B of the watch.
  6. The screen switch to the [Timer] screen.

    On the figure just above, 5 minute is set as countdown time.

    Here we change the countdown time to 3 minutes for example.

  7. Press the lower right button A of the watch.
  8. “·” at the left of [5 min] moves to the left of [15 min].

    !

    “·” is works as a cursor.
    Use the lower right button A and the upper right button C of the watch to move the cursor.

  9. Press the lower right button A of the watch.
  10. “·” at the left of [15 min] moves to the left of [Custom].

  11. Press the middle right button B of the watch.
  12. Countdown time become adjustable in 1-minute increments.

    !

    The middle right button B works here as the OK button.

  13. Press and release the lower right button A or the upper right button C of the watch repeatedly to choose [3 min].
  14. !

    Each time you press the buttons, countdown time changes.

    !

    It keeps changing while you are pressing and holding one of the buttons.

  15. Press the middle right button B of the watch.
  16. [3 min] is set as countdown time.

  17. Press the middle right button B of the watch.
  18. The minute hand overlaps the hour hand and they starts to rotate counterclockwise as the second hand to start countdown.

After measurement

The watch vibrates to tell you time is up.

To cancel measurement

Measurement of timer and other functions does not stop even when the display is switched.
To cancel measurement, stop it following the steps below.

  1. Press the middle right button B of the watch during measurement.
  2. The time remaining and the alternatives, [Resume] and [Cancel], appear on the display.

    !

    In some types of measurement, the alternatives may be [Resume] and [End].

  3. Press the lower right button A of the watch during measurement.
  4. [Cancel] is chosen.

  5. Press the middle right button B of the watch during measurement.
  6. Measurement is stopped.

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