> BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) > Leap second (Automatic leap second reception function)

Leap second (Automatic leap second reception function)

Leap second

The leap second is to compensate for deviations from the universal time (UT) which is astronomically determined and the “International Atomic Time (TAI).

“1 second” may be added (deleted) once a year or every few years.

Automatic leap second reception function

A leap second is automatically added by receiving “leap second data” from GPS signals at the time of leap second addition (deletion).

“Leap second data” includes information about future leap second addition and current leap second data.

Receiving leap second data

Receiving the leap second data

5X83_31-01

When the GPS signal reception (automatic time adjustment, manual time adjustment, or time zone adjustment) is performed on or after December 1st and June 1st, the multi-function indicator hand may display as shown at the right.

When the leap second data reception is completed, the multi-function indicator hand returns to display the day of the week (or the charging status). Use the watch as it is.

The leap second data reception is performed every half a year regardless of leap second addition.

After the completion of time adjustment (automatic time adjustment or manual time adjustment), up to 18 minutes may be required until receipt of leap second data is complete.

When GPS signals are received under the following conditions, the leap second data reception is also started.

GPS signals have not been received for a long time

Leap second data reception has failed

With GPS signal reception, leap second data reception will be performed again. This will continue until leap second data reception is successful. Confirm the result (success or failure) of the leap second data reception.

Check whether leap second data reception was successful

The reception result (success or failure) of the regular leap second data reception is displayed for 5 seconds.

  1. Press Button A once and then release it

  2. The seconds hand and multi-function indicator hand display the reception result.

    5X83_29-01 + Push ButtonA

    Press and then release

    When Button A is kept pressed, the watch enters the Manual time adjustment operation.

  3. The result of the reception is displayed

  4. The seconds hand displays the result of the GPS signal reception (time adjustment or time zone adjustment).

    The multi-function indicator hand points to “1” or “4+” which shows “time adjustment” or “time zone adjustment.”

    5X83_32-02

    The indicator hand points to “4+” as a result of time zone adjustment.

    Seconds hand: Reception result (success/failure)

    Result

    Successful

    Failed

    Display

    P18-5-P
    P18-5-P2

    Position

    Y: 8-second position

    N: 52-second position

    After 5 seconds have elapsed or when Button B is pressed, the watch returns to the time display mode.

  5. Press Button A and then release it while the result of the reception is displayed (for 5 seconds) in step 2

  6. The seconds hand displays the result of the leap second data reception (successful / failed).

    The multi-function indicator hand displays “LEAP SEC.” of the leap second data reception.

    5X83_32-03 + Leap second reception function

    Seconds hand

    Press and then release

    Seconds hand: Reception result (success/failure)

    Result

    Successful

    Failed

    Display

    P18-5-P
    P18-5-P2

    Position

    Y: 8-second position

    N: 52-second position

    After 5 seconds have elapsed or when Button B is pressed, the watch returns to the time display mode.

    When the leap second data reception result is Y (successful)

    The leap second data reception was successful.
    Use the watch as it is.

    When the leap second data reception result is N (failed)

    The leap second data reception, periodically performed, has not been successful.
    It will be performed automatically with the next GPS signal reception (automatic time adjustment, manual time adjustment or time zone adjustment). Use the watch as it is.

    The leap second data is received on or after December 1st and June 1st.

    Even when the leap second data reception has not been successful, the time is correct until the leap second data is added (deleted).

    Move to the outdoors where GPS signals can be easily received as necessary to receive GPS signals.