User Guide

Time Calibration Signal Reception
Ranges
● Japan (JJY)
The Japan time signal radio stations are
located on Mt. Otakadoya in Fukushima and
Mt. Hagane in Fukuoka/Saga.
The reception range of the Japanese time
signals is approximately 1,000 km from each
transmission station.
● China (BPC)
The China time signal radio station is located
in Shangqiu, Henan Province, China.
The reception range of the Chinese time
signal is approximately 1,500 km from the
transmission station.
● United States (WWVB)
The United States time signal radio station is
located in Fort Collins, Colorado.
The reception range of the U.S. time signal is
approximately 3,000 km from the transmission
station.
● U.K. (MSF)/Germany (DCF77)
The U.K. time signal radio station is located in
Anthorn, Cumbria.
The German time signal radio station is
located in Mainflingen, southeast of Frankfurt.
The reception range of the U.K. and German
time signals is approximately 1,500 km from
each transmission station.
Note
●
Even if you are within the normal
reception range of a time calibration
signal, reception may be made
impossible by the following factors:
geographic contours, weather, the
season, the time of day, wireless
noise.
Auto Time Calibration Signal
Receive
An automatic time calibration signal receive
operation is performed and the time and day
settings are adjusted between midnight and
5:00 a.m. Once a signal receive operation is
successful, no more auto receive operations
are performed that day.
Getting Ready
Enter the Timekeeping Mode.
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Navigating Between Modes
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0
Place the watch near a window or some other
location appropriate for signal reception.
●
The second hand points to [RC] while time
calibration reception in progress.
●
When the receive operation is successful,
the time and day settings will be adjusted
automatically.
Note
●
Reception takes anywhere from about
two minutes to about 10 minutes. It can
take as long as 20 minutes.
●
If the watch connects with a phone and
adjusts its time setting, the watch will
not perform auto receive of a time
calibration signal for the rest of that day
or the next day.
Manual Time Calibration Signal
Receive
1. Place the watch near a window or some
other location appropriate for time signal
reception.
2. Enter the Timekeeping Mode.
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Navigating Between Modes
3. Hold down (B) for about 1.5 seconds until
the second hand points to [RC].
This indicates that the receive operation
has started. After the receive operation is
complete, the watch’s time and day
settings will be adjusted accordingly.
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0
Note
●
Reception takes anywhere from about
two minutes to about 10 minutes. It can
take as long as 20 minutes.
●
Time calibration signal reception is
better at night than during the day.
Signal Reception Precautions
●
When the watch is unable to adjust its time
in accordance with a calibration signal for
some reason, average timekeeping
accuracy is within ±15 seconds per month.
●
Note that an internal decoding process the
watch performs after it receives a signal
may cause the time setting to be slightly off
(by less than one second).
●
Time calibration signal reception is not
possible under the conditions described
below.
ー
While battery power is low
ー
While in the Stopwatch Mode
ー
At Power Saving Level 2
ー
While the crown is pulled out
ー
While the Home City setting is one where
time signal reception is not possible
ー
While the watch is outside the time signal
reception range
●
As of January 2018, China does not
observe summer time. If China starts to
observe summer time in the future, the time
displayed by the watch for China may not be
correct.
Operation Guide 5544
7