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Operation Guide 5173
Daylight Saving Time (DST)
Daylight Saving Time (summer time) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use Daylight
Saving Time.
The time calibration signals transmitted from Mainflingen (Germany), Anthorn
(England), and Fort Collins (the United States) include both Standard Time and DST
data. When the Auto DST setting is turned on, the watch switches between Standard
Time and DST (Daylight Saving Time) automatically in accordance with the signals.
Though the time calibration signals transmitted by the Fukushima and Fukuoka/ •
Saga, Japan transmitters include summer time data, summer time currently is not
implemented in Japan (as of 2010).
The default DST setting is Auto DST ( •
) whenever you select LIS, LON, MAD,
PAR, ROM, BER, STO, ATH, MOW, TYO, ANC, YVR, LAX, YEA, DEN, MEX, CHI,
MIA, YTO, NYC, YHZ, or YYT as your Home City code.
If you experience problems receiving the time calibration signal in your area, •
it probably is best to switch between Standard Time and Daylight Saving Time
(summer time) manually.
To change the Daylight Saving Time (summer time) setting
In the Timekeeping Mode, hold down 1. A for about five
seconds until the left dial hand points to T1 and the city
code flashes on the upper display. This is the setting
mode.
Press 2. C. This will display the DST setting screen.
Use 3. D to cycle through the DST settings in the sequence
shown below.
Auto DST ( ) DST off (
OFF
)
DST on (
ON
)
When the setting you want is selected, press 4. A twice to exit the setting mode.
The DST indicator appears to indicate that Daylight Saving Time is turned on. •
Dual Time
Dual Time lets you display the current time in another time zone called your “Dual
Time City”, in addition to your Home City’s current time. This feature is very handy for
business professionals and others who need to keep track of the current time in two
different time zones.
For information about how to display the current time in the Dual Time City in the •
lower display, see “Timekeeping”.
To specify the Dual Time City
In the Timekeeping Mode, hold down 1. A for about five
seconds until the left dial hand points to T1 and the city
code flashes on the upper display. This is the setting
mode.
Press 2. A again. The left dial hand will move to T2 and
the current Dual Time City code will start to flash on
the upper display. This is the Dual Time City selection
screen.
Use 3. D (east) and B (west) to scroll through the
available city codes.
See the “City Code Table” for information about city •
codes.
Press 4. A to exit the setting mode.
Correction of Hand Home Positions
The hour and minute hands of the watch can be thrown off by exposure to strong
magnetism or impact. The watch is designed to perform hour and minute hand
correction automatically every hour in order to correct variation within the range of
–55 minutes to +5 minutes.
You can trigger auto hour and minute hand position correction manually, if you •
want.
If the variation is greater than –55 minutes to +5 minutes, you can trigger auto hand •
position correction manually or perform correction of the hour and minute hand
home positions manually.
If the dial hands are off, you will need to correct their home positions manually. •
To trigger auto correction of hand home positions
In the Timekeeping Mode, hold down D for about six
seconds, until H-SET starts flashing on the upper display.
Note that • H-SET will appear on the upper display about
three seconds after you depress D, but you should
not release the button until H-SET starts flashing. The
flashing H-SET indicates that auto hour and minute hand
home position correction has started.
Auto hour and minute hand home position correction •
takes about three and a half minutes to complete. Do not
perform any other watch operation during that time.
The watch will return to the Timekeeping Mode automatically after auto correction •
is complete.
You will not be able to trigger auto correction while the watch is in the Countdown •
Timer Mode or while a countdown timer operation is in progress.
To interrupt an ongoing auto correction, press • D. This will return to the
Timekeeping Mode.
DST indicator
Left dial hand
Currenty selected
Dual Time City
To adjust the home positions manually
In the Timekeeping Mode, hold down 1. D for about three
seconds until H-SET appears on the upper display and
“Sub” flashes on the lower display.
The dial hands are in their correct home positions •
when the left dial hand moves to C (Charge) and the
right dial hand moves to 12. If they don’t, use B to
adjust the left dial hand position and D to adjust the
right dial hand position.
After confirming that both dial hands are in their correct 2.
home positions, press C.
This will change to hour hand and minute hand home •
position manual correction.
The hour and minute hands are in their correct home •
positions if they are at 12 o’clock. If they are not, use
D (+) and B (–) to adjust their positions as required.
Pressing • C here will return to the setting at the
beginning of step 2.
After everything is the way you want, press 3. A to return
to the Timekeeping Mode.
After you complete the home position adjustment •
procedure, place the watch in a location that allows
for good time calibration signal reception, and then
perform a manual receive operation. See “To perform
manual receive” for more information.
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Power Saving Function
When turned on, the Power Saving function enters a sleep
state automatically whenever the watch is left in an area
for a certain period where it is dark. The table below shows
how watch functions are affected by the Power Saving
function.
Elapsed Time in Dark Hands and Display Operation
60 to 70 minutes Left dial hand: PS; Right dial
hand: “12”; Other hands:
Normal; Display: Blank
All functions enabled, except
for displays
6 or 7 days Left dial hand: PS; Other
hands: Stopped at 12 o’clock;
Display: Blank
Auto receive, beeper tone,
illumination, and display
disabled
Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state. •
The watch will not enter the sleep state between 6:00 AM and 9:59 PM. If the watch •
is already in the sleep state when 6:00 AM arrives, however, it will remain in the
sleep state.
To recover from the sleep state
Perform any one of the following operations.
Move the watch to a well-lit area. •
Press any button. •
Angle the watch towards your face for reading. •
To turn Power Saving on and off
In the Timekeeping Mode, hold down 1. A for about five
seconds until the left dial hand points to T1 and the city
code flashes on the upper display. This is the setting
mode.
Press 2. C nine times until PS appears in the upper
display and a flashing ON or OFF appears in the lower
display. This is the Power Saving ON/OFF screen.
Press 3. D to toggle Power Saving on (ON) and off
(OFF).
Press 4. A twice to exit the setting mode.
Radio-controlled Atomic Timekeeping Precautions
Strong electrostatic charge can cause the time setting to be thrown off. •
The time calibration signal bounces off the ionosphere. Because of this, such •
factors as changes in the reflectivity of the ionosphere, as well as movement of the
ionosphere to higher altitudes due to seasonal atmospheric changes or the time of
day may change the reception range of the signal and make reception temporarily
impossible.
Even if the time calibration signal is received properly, certain conditions can cause •
the time setting to be off by up to one second.
The current time setting in accordance with the time calibration signal takes priority •
over any time settings you make manually.
The watch is designed to update the date and day of the week automatically for •
the period January 1, 2000 to December 31, 2099. Setting of the date by the time
calibration signal cannot be performed starting from January 1, 2100.
This watch can receive signals that differentiate between leap years and non-leap •
years.
Though this watch is designed to receive both time data (hour, minutes, seconds) •
and date data (year, month, day), certain signal conditions can limit reception to
time data only.
If you are in an area where proper time calibration signal reception is impossible, •
the watch keeps the time with the precision noted in “Specifications”.
If you have problems with proper time calibration signal reception or if the time •
setting is wrong after signal reception, check your current city code, and DST
(Daylight Saving Time) settings.
The Home City setting reverts to the initial default of • TYO (Tokyo) whenever the
battery power drops to Level 5 (C: Charge) or when you have the rechargeable
battery replaced. If this happens, change the Home City to the setting you want.
Correct dial hand
positions
Correct hour and minute
hand positions
On/Off status