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Operation Guide 5161
E-50
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
E-51
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
Approximate
Exposure Time
8 minutes
30 minutes
48 minutes
8 hours
Charging Guide
The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.
• For details about the battery operating time and daily operating conditions, see the
“Power Supply” section of the Specifications (page E-78).
• Stable operation is promoted by frequent exposure to light.
E-52
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Approximate Exposure Time
Level 5 Level 4 Level 3 Level 2 Level 1
2 hours 16 hours 5 hours
4 hours 58 hours 16 hours
7 hours 94 hours 26 hours
76 hours - - - - - - - - - - - - - - - -
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through a
Window (10,000 lux)
Daylight Through a
Window on a Cloudy
Day (5,000 lux)
Indoor Fluorescent
Lighting (500 lux)
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
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E-53
Timekeeping
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 first
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 Mode city codes (page E-32) are
displayed in accordance with the time and date settings you configure in the
Timekeeping Mode.
• The watch automatically adjusts its analog setting to match the current digital setup
of your Home City. If the analog time is not correct even though you are sure the
digital setup of your Home City is correct and the watch is performing signal
reception properly, check the home positions of the hands and make adjustments if
necessary (page E-63).
E-54
To set the time and date manually
1.In the Timekeeping Mode, hold down A for about three
seconds. You can release the button after “ADJ”
appears on the display.
• At this time, “12H” (12-hour timekeeping) or “24H” (24-
hour timekeeping) also will be flashing on the display.
• The second hand will move to 12 o’clock and stop
there.
2.Press C to toggle between 12-hour (12H) and 24-hour
(24H) timekeeping.
3.Press B and the city code of the current Home City will
flash on the display.
4.Use C to select the city code you want.
• Make sure you select your Home City code before
changing any other setting.
• For full information on city codes, see the “City Code
Table” at the back of this manual.
E-55
5. Press B to move the flashing in the sequence shown below to select the other
settings.
Seconds
12/24-Hour
Format
Hour
Minutes
DST
Month
Ye a r
City Code
Day
Language
Button
Operation Tone
• The following steps explain how to configure timekeeping settings only.
6. When the timekeeping setting you want to change is flashing, use C to change it
as described below.
Toggle between 12-hour (
) and 24-
hour ( ) timekeeping
Change the city code
Press C.
Screen:
To do this: Do this:
E-56
/
Cycle between Auto DST ( ), Daylight
Saving Time (
) and Standard Time
( ).
Reset the seconds to
Change the hour and minutes
Change the year, month, or day
Toggle the button operation tone between
(on) and (off)
Change the language of the day of the week
: English : German : Spanish
: Chinese : Japanese
Press C.
Screen: To do this: Do this:
E-57
7. Press A to exit the setting screen.
• Auto DST (
) can be selected only while LON, PAR,ATH, TYO, HNL, ANC, LAX,
DEN, CHI,orNYC 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) settings.
12-hour and 24-hour timekeeping
• With the 12-hour format, the P (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 to the left of the
hour digits 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.
• The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is
applied in all other modes.
E-58
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), or 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 (summer 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 LON, PAR, ATH,
TYO, ANC, LAX, DEN, CHI, or NYC 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.
E-59
To change the Daylight Saving Time (summer time) setting
1.In the Timekeeping Mode, hold down A for about three
seconds. You can release the button after “ADJ”
appears on the display.
• At this time, “12H” (12-hour timekeeping) or “24H” (24-
hour timekeeping) also will be flashing on the display.
2.Press B twice to enter the Daylight Saving Time
setting mode.
3.Use C to cycle through the DST settings in the
sequence shown below.
Auto DST ( ) DST off ( ) DST on ( )
AT (AUTO)
This setting causes the watch to switch between standard time and summer time
automatically, in accordance with time calibration signal data. This setting is
available only when a city code that supports signal reception is selected as the
Home City.
DST indicator