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Operation Guide 5178
E-30
Probable Cause
• The Home City setting is not
correct for the area where you are
using the watch.
• The home position of the hands is
off.
Problem
The time setting
is incorrect
following signal
reception.
What you should do
• Select the correct Home
City (page E-12).
• Enter the home position
adjustment mode and
adjust the home position
(page E-45).
• For further information, see “Important!” (page E-21) and “Radio-controlled Atomic
Timekeeping Precautions” (page E-60).
E-31
30
Stopwatch
The stopwatch measures elapsed time in units of 1/20
second up to 23 hours, 59 minutes, 59.95 seconds (24
hours). When the maximum limit is reached, the elapsed
time returns to zero automatically and timing continues
from there.
Stopwatch second hand
Points to 0 in the
Stopwatch Mode.
Functions as a 1/20-
second hand during
an elapsed time
operation.
Stopwatch
time hour and
minute hands
E-32
To start or stop an elapsed time operation
In the Stopwatch Mode, press B to start and stop the stopwatch.
• Pressing D during an elapsed time operation stops the hands at the split time.
Elapsed time measurement continues internally. After about five seconds, the hands
will return to normal elapsed time indication.
• 1/20-second timing is performed only for the first 30 seconds after you start or
restart an elapsed time operation. The 1/20-second hand also jumps to the elapsed
time position when you stop an elapsed time operation.
• Pressing D while the stopwatch is stopped will reset stopwatch to zero. The
following operations are not possible while the watch’s hands are moving during a
stopwatch elapsed time operation.
Split, reset
E-33
To measure elapsed time
Start
B
Stop
B
Reset
D
To measure split times
Start
B
Split
D
Stop
B
Reset
D
Normal measurement
resumed after 5 seconds.
• Pressing D again while a split time is indicated will cause the hands to jump to a
new (current) split time.
• Pressing B while a split time is indicated will stop the elapsed time operation,
causing the hands to jump to the stop time.
Cumulative Elapsed Time Measurement
Pressing B to restart the stopwatch without resetting it will resume the elapsed time
operation from where it was last stopped.
E-34
World Time
World time lets you display the current time in any one of
29 cities (29 time zones) around the world.
• If the current time is not correct, check your current
Home City settings and make adjustments as required
(page E-38).
• The following operations are not possible while the
watch’s hands are moving to the current time for a newly
selected city code.
Using
A
to switch between standard time (STD) and
daylight saving time (DST).
Using
B
to swap the Home City and World Time City
• For full information on city codes, see the “City Code
Table” at the back of this manual.
30
City code
In the World Time Mode, indicates
the current daylight saving time
setting (STD or DST).
World Time
E-35
To search for a city
In the World Time Mode, press D to move the second hand (which is pointing at the
currently selected city code) clockwise.
• About one second after you release D, the hands of the watch will move to the
current time in the zone of the city code indicated by the second hand.
Daylight Saving Time (summer time)
Daylight saving time calls for setting clocks ahead one hour from standard time during
the summer season.
• Note that the start and end of daylight time, and whether it is used at all depends on
each country and geographic area.
Standard time
Daylight saving time
The hand points to STD (standard time).
The hand points to DST (daylight saving time).
E-36
To change the STD/DST setting of a particular city code
1.In the World Time Mode, use D to select the city
whose setting you want to change.
2.Hold down A for about two seconds to toggle between
daylight saving time and standard time.
• You can select STD or DST for each World Time city
code, except UTC.
30
Hold down
A for two
seconds.
▲
▲
E-37
Swapping your Home City and World Time City
You can use the procedure below to swap your Home City and World Time City. This
capability can come in handy when you travel frequently between two cities in different
time zones.
• If your current World Time City supports receipt of a time calibration signal, making it
your Home City enables calibration signal reception.
To swap your Home City and World Time City
1. In the World Time Mode, use D to select the World Time City you want.
2. Hold down B for about three seconds.
• This will make the World Time City (which you selected in step 1), your Home City.
At the same time, it will change the Home City you had selected prior to step 2 to
your World Time City.
• After swapping the Home City and World Time City, the watch stays in the World
Time Mode with the city that was selected as the Home City prior to step 2 now
displayed as the World Time City.
E-38
Home City and DST
Use the procedure in this section to configure your Home
City (the place where you normally use the watch) and
daylight saving time settings.
• Use the Timekeeping Mode to configure Home City and
daylight saving time settings.
To set your Home City time
1.In the Timekeeping Mode, keep A depressed (for
about five seconds) as the second hand moves to the
last signal reception result (“Y” or “N”), then to “READY”
(or “R” for some models), and then to the city code of
the currently selected Home City.
• This indicates the city code setting mode.
2.Use C to cycles through available settings in the
sequence shown below.
30
City code
E-39
C
• Home City
• DST setting
Hour and
minute
C
Year
C
C
Month
C
Day
3. Use D to move the second hand clockwise to select the city code you want.
4. While the city code you want is selected, press B to toggle between STD
(standard time) and DST (daylight saving time).
• You will not be able to change the STD/DST setting while the watch’s hands are
moving to the current time for a newly selected city code. Wait until the hands stop
moving.
Standard time
Daylight saving time
The hand points to STD (standard time).
The hand points to DST (daylight saving time). Daylight
saving time is one hour ahead of standard time.