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Operation Guide 5163 (OC)
E-47
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
x
page E-42.
To specify the Dual Time City
In the Timekeeping Mode, hold down 1. A for about fi ve seconds until the left
dial hand points to T1 and the city code fl ashes 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 fl ash 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” at the back of this manual for information about
x
city codes.
Press 4. A to exit the setting mode.
Left dial hand
Currently selected
Dual Time City
E-46
The default DST setting is Auto DST ( x ) 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
x
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 fi ve seconds until the left
dial hand points to T1 and the city code fl ashes 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 ( ) DST on ( )
When the setting you want is selected, press 4. A twice to exit the setting mode.
The
x DST indicator appears to indicate that Daylight Saving Time is turned on.
DST indicator
E-45
Auto DST ( x ) can be selected only while
LIS
,
LON
,
MAD
,
PAR
,
ROM
,
BER
,
STO
,
ATH
,
MOW
,
TPE
,
SEL
,
TYO
,
HNL
,
ANC
,
YVR
,
LAX
,
YEA
,
DEN
,
MEX
,
CHI
,
MIA
,
YTO
,
NYC
,
YHZ
, or
YYT
is selected as the Home City code. For
more information, see “Daylight Saving Time (DST)” below.
The day of the week is displayed automatically in accordance with the date (year, month, and day)
x
settings.
12-hour and 24-hour timekeeping
With the 12-hour format, the PM ( x PM) indicator appears to the left of the hour digits for times in the
range of noon to 11:59 p.m. and no indicator appears for times in the range of midnight to 11:59 a.m.
With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without any indicator.
x
The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is applied in all other x
modes.
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 Mainfl ingen (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
x
transmitters include summer time data, summer time currently is not implemented in Japan (as of
2010).
E-44
When the timekeeping setting you want to change is fl ashing, use 4. D or B to change it as described
below.
Screen: To do this: Do this:
Change the city code.
Use D (east) and B (west).
Cycle between Auto DST ( ), Daylight Saving
Time (
) and Standard Time ( ).
Press D.
Toggle between 12-hour ( ) and 24-hour ( )
timekeeping.
Press D.
Reset the seconds to .
Press D.
Change the hour and minutes.
Use D (+) and B (–).
Change the year, month, or day.
Toggle between Power Saving on ( ) and off ( ).
Press D.
Press 5. A twice to exit the setting mode.
For details about the Daylight Saving Time setting, see “To change the Daylight Saving Time x
(summer time) setting” (page E-46). For information about Power Saving, see “To turn Power Saving
on and off” (page E-51).
E-43
Read This Before You Set the Time and Date!
This watch is preset with a number of city codes, each of which represents the time zone where that city is
located. When setting the time, it is important that you fi rst select the correct city code for your Home City
(the city where you normally use the watch). If your location is not included in the preset city codes, select
the preset city code that is in the same time zone as your location.
Note that all of the times for the World Time City codes (page E-24) and Dual Time City (page E-47) are
x
displayed in accordance with the time and date settings you confi gure for the Timekeeping Mode.
To set the time and date manually
In the Timekeeping Mode, hold down 1. A for about fi ve seconds until the left
dial hand points to T1 and the city code fl ashes on the upper display. This is
the setting mode.
Use 2. D and B to select the city code you want.
Make sure you select your Home City code before changing any other
x
setting.
For full information on city codes, see the “City Code Table” at the back x
of this manual.
Press 3. C to change the fl ashing screen content in the sequence shown below to select the other
settings.
City Code DST 12/24-Hour Format Seconds Hour
Power Saving Day Month Year Minutes
E-42
Timekeeping
You can adjust the Home City time and date in the Timekeeping Mode manually.
You also can simultaneously display the current time in one other time zone, by specifying a Dual Time
City.
For information about selecting a Dual Time City, see “To specify the Dual Time City” (page E-47).
x
Pressing x D in the Timekeeping Mode will cycle the lower display between the screens shown below.
Home City Date Home City Time Dual Time
D D
D
E-41
For details about the battery operating time and daily operating conditions, see the “Power Supply” x
section of the Specifi cations (page E-56).
Stable operation is promoted by frequent exposure to light.
x
Recovery Times
The table below shows the amount exposure that is required to take the battery from one level to the next.
Exposure Level (Brightness)
Approximate Exposure Time
Level 5 Level 4 Level 3 Level 2 Level 1
Outdoor sunlight (50,000 lux) 2 hours 21 hours 6 hours
Sunlight through a window
(10,000 lux)
6 hours 78 hours 21 hours
Daylight through a window on a
cloudy day (5,000 lux)
10 hours 126 hours 34 hours
Indoor fl uorescent lighting (500 lux) 106 hours – – – – – –
The above exposure time values are all for reference only. Actual required exposure times depend on x
lighting conditions.
E-40
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid leaving the watch in the areas
described below whenever charging its rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid crystal display to black out. The
appearance of the LCD should become normal again when the watch returns to a lower temperature.
Warning!
Leaving the watch in bright light to charge its rechargeable battery can cause it to become quite
hot. Take care when handling the watch to avoid burn injury.
The watch can become particularly hot when exposed to the following conditions for long periods.
On the dashboard of a car parked in direct sunlight
Too close to an incandescent lamp
Under direct sunlight
Charging Guide
After a full charge, timekeeping remains enabled for up to about six months.
The following table shows the amount of time the watch needs to be exposed to light each day in order x
to generate enough power for normal daily operations.
Exposure Level (Brightness) Approximate Exposure Time
Outdoor sunlight (50,000 lux) 8 minutes
Sunlight through a window (10,000 lux) 30 minutes
Daylight through a window on a cloudy day (5,000 lux) 48 minutes
Indoor fl uorescent lighting (500 lux) 8 hours