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Operation Guide 5041
About Auto Receive
The watch receives the time calibration signal automatically up to six times a day.
When any auto receive is successful, the remaining auto receive operations are not
performed. The reception schedule (calibration times) depends on your currently
selected Home City, and whether standard time or Daylight Saving Time is selected
for your Home City.
Your Home City
Auto Receive Start Times
1
2
LON
Standard Time
1:00 am
2:00 am
Daylight
2:00 am
3:00 am
Saving Time
PAR
Standard Time
2:00 am
3:00 am
Daylight
3:00 am
4:00 am
Saving Time
ATH
Standard Time
3:00 am
4:00 am
Daylight
4:00 am
5:00 am
Saving Time
Note
• When a calibration time is reached, the watch will receive the calibration signal only
if it is in either the Timekeeping Mode or World Time Mode. Reception is not
performed if a calibration time is reached while you are configuring settings.
• Auto receipt of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that the Timekeeping Mode time is set correctly).
Before going to bed for the night, remove the watch from your wrist, and put it in a
location where it can receive the signal easily.
• The watch receives the calibration signal for two to 14 minutes every day when the
time in the Timekeeping Mode reaches each of the calibration times. Do not perform
any button operation within 14 minutes before or after the calibration times. Doing so
can interfere with correct calibration.
• Remember that reception of the calibration signal depends on the current time in the
Timekeeping Mode.
To perform manual receive
1. Place the watch on a stable surface so its 12 o'clock
side is facing towards a window.
2. In the Timekeeping Mode, hold down A for about two
seconds until the watch beeps.
3. The second hand will move to R (READY) to indicate
that the watch is setting up for time calibration
reception.
• The second hand will move to W (WORK) and stay there
while actual reception is in progress.
• If signal reception is unstable during reception, the
second hand may move between W (WORK) and
W (WORK)
R (READY).
• The hour and minute hands continue to keep time
R (READY)
normally.
• Time calibration signal reception takes from two to
seven minutes, but in some cases it can take as long as
14 minutes. Take care that you do not perform any
button operations or move the watch during this time.
• If reception is successful, the second hand will move to
Y (YES). Five seconds later, the hands will move to the
correct time.
N (NO)
Y (YES)
Note
• To interrupt a receive operation and return to the Timekeeping Mode, press any
button.
• If reception is not successful, the second hand will move to N (NO). Five seconds
later, the second hand will resume normal operation, without any adjustment of the
hand setting.
• If the second hand is pointing to Y (YES) or N (NO), you can return to the
Timekeeping Mode by pressing A.
Viewing the Latest Signal Reception Results
You can use the procedure below to check whether or not the last signal receive
operation was successful.
To check the latest signal reception results
In the Timekeeping Mode, press A.
• If the watch was able to perform a successful signal
receive operation since midnight, the second hand will
move to Y (YES). If the watch has been unable t o
receive any signal successfully, the second hand will
move to N (NO).
• The watch will return to the Timekeeping Mode after five
seconds or when you press A.
• The current receive result is cleared when the first auto
N (NO)
receive operation is performed on the following day. This
Y (YES)
means Y (YES) indicates successful signal reception
since the start of the current day.
• If you adjust the time or date setting manually, the second hand will move to N (NO).
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
Problem
Probable Cause
• You changed the time setting manually.
The second
• You performed some button operation
hand is pointing
at N (NO).
during the auto receive operation.
• The watch is not in the Timekeeping
Mode.
• Signal reception results are reset at
midnight each day.
• Radio interference is often present
during the day time, which can interfere
with calibration signal reception.
• The Home City setting is not correct
The time setting
is incorrect
for the area where you are using the
following signal
watch.
• The home position of the hands is
reception.
off.
• For further information, see "Important!" under "Time Calibration Signal Reception"
and "Radio-controlled Atomic Timekeeping Precautions".
3
4
5
6
3:00 am
4:00 am
5:00 am
Midnight*
4:00 am
5:00 am
Midnight*
1:00 am*
4:00 am
5:00 am
Midnight*
1:00 am*
5:00 am
Midnight*
1:00 am*
2:00 am*
5:00 am
Midnight*
1:00 am*
2:00 am*
Midnight*
1:00 am*
2:00 am*
3:00 am*
* Next day
What you should do
• Perform manual signal
receive at night or wait until
the next auto signal receive
operation is performed.
• Enter the Timekeeping
Mode and try again.
• Check to make sure the
watch is in a location
where it can receive the
signal.
• Select the correct Home
City.
• Enter the home position
adjustment mode and
adjust the home position.
Twin Stopwatch
Your watch has two stopwatches built in, each of which can measure elapsed time and
cumulative elapsed time in 1/100-second units up to 29 minutes, 59.99 seconds (30
minutes total).
• When the maximum limit is reached by either stopwatch, it returns to zero
automatically and timing continues from there.
• A stopwatch elapsed time measurement operation continues even if you exit the
Stopwatch Mode.
• All of the operations in this section are performed in the Stopwatch Mode, which you
enter by pressing C.
Stopwatch B
Stopwatch minute hand
(Used for both A and B.)
Stopwatch A
Stopwatch A second hand
Entering the Stopwatch Mode
Use the C button to enter the Stopwatch Mode.
• The second hand of Stopwatch A or Stopwatch B will move to 12 o'clock. "ST" will
appear on the digital display.
Elapsed Time Measurement in Progress
If you enter the Stopwatch Mode while elapsed time measurement is being performed,
the second hands of Stopwatch A and Stopwatch B will quickly move to the current
elapsed second. The stopwatch minute hand and the digital display will indicate the
minutes of the last stopwatch (A or B) you were viewing the last time you exited the
Stopwatch Mode.
Elapsed Time Measurement Not in Progress
Both stopwatches will be reset to their starting positions, with the stopwatch minute
hand stopped at 0 and the digital display showing 00. Stopwatch A will be standing by
to start timing. The hour and minute hands of the watch indicate the current
Timekeeping Mode time.
Elapsed Time Measurements
Perform the same steps for either of the stopwatches. Each stopwatch can be used to
perform a separate timing operation.
1. Press the A button to toggle between Stopwatch A and Stopwatch B.
• The stopwatch minute hand and the digital display indicate the minutes and
1/100 seconds for the currently selected stopwatch.
2. Press the B button to start and stop the currently selected stopwatch.
• Pressing the B button to restart the stopwatch without resetting it to all zeros
resumes elapsed time measurement from where it was last stopped.
• Switching from one stopwatch to another does not stop any ongoing timing
operation. The timing operations continue internally, even though they are not
indicated on the display.
Resetting a Stopwatch
• To reset the currently selected stopwatch to its starting position, make sure it is
stopped and then hold down the B button for about three seconds.
• To reset both of the stopwatches to their starting positions, make sure they are both
stopped and then hold down the A button for about three seconds.
World Time
The World Time Mode shows you the current time in 29
City code
Second
cities (29 time zones) around the world.
hand
• When you enter the World Time Mode, the second hand
will move to the city code that is currently selected as
the World Time city. At the same time, the hour and
minute hands will move to the current time in that city.
• If the current time shown for a city is wrong, check your
Home City settings and make the necessary changes.
• All of the operations in this section are performed in the
World Time Mode.
Seconds
Minutes
Current time (hour) in
the currently selected
World Time city
To view the time in another city
In the World Time Mode, use B to move the second hand to the city code you want to
select as the World Time city.
• The hour hand, minute hand, and second display will change automatically to the
applicable settings for the currently selected city code.
• All buttons (except for C for changing modes) are disabled while the hands and
second display are changing.
• For full information on city codes, see the "City Code Table".
To toggle a city code time between Standard Time and Daylight Saving Time
1. In the World Time Mode, use B to move the second
hand to the city code whose Standard Time/Daylight
Saving Time setting you want to change.
2. Hold down A for about three seconds until the watch
beeps to toggle Daylight Saving Time (DST indicator
displayed) and Standard Time (DST indicator not
displayed).
• Note that you cannot switch between Standard Time and
L
Hold down
Daylight Saving Time while UTC is selected as the city
A for three
code.
seconds.
• Note that the Standard Time/Daylight Saving Time
setting affects only the currently displayed city code.
Other city codes are not affected.
DST indicator
Stopwatch B second hand
Stopwatch 1/100 second
indicator
(Used for both A and B.)
2
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