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Operation Guide 3090
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Exposure Level
Approximate Exposure Time
(Brightness)
Level 5
Outdoor Sunlight
2 hours
(50,000 lux)
Sunlight Through a Window
6 hours
(10,000 lux)
Daylight Through a Window
11 hours
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting
127 hours
(500 lux)
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
Timekeeping
Use the Timekeeping Mode to set and view the current time and date.
• When setting the time, you can also configure settings for the 12/24-hour format,
and power saving on/off, and you can specify the screens that are displayed in the
Timekeeping Mode.
• Pressing D in the Timekeeping Mode will display the Last Signal screen.
Press D.
Setting the Time and Date
Make sure you select your Home City code before you change the current time and
date settings. World Time Mode times are all displayed in accordance with the
Timekeeping Mode settings. Because of this, World Time Mode times will not be
correct if you do not select the proper Home City code before setting the time and
date in the Timekeeping Mode.
To set the time and date
1. In the Timekeeping Mode, hold down A until the city
City code
code starts to flash, which indicates the setting screen.
2. Press C to change the flashing contents in the
sequence shown below to select other settings.
12/24-Hour
City Code
DST
Format
Power
Day
Month
Saving
3. When the setting you want to change is flashing, use B and/or D to change it as
described below.
Screen:
To do this:
Change the city code
Cycle between auto DST (AT),
Standard Time (OFF), and Daylight
Saving Time (ON)
Toggle between 12-hour (12H) and
24-hour (24H) timekeeping
Reset the seconds to 00
Change the hour or minutes
Change the year, month, or day
Toggle Power Saving on (ON) and
off (OFF)
• See "City Code Table" for a complete list of available city codes.
• Auto DST (AT) can be selected only while LIS, LON, MAD, PAR, ROM, BER, STO,
ATH, MOW, HKG, BJS, TPE, SEL, TYO, HNL, ANC, YVR, LAX, YEA, DEN, MEX,
YWG, CHI, MIA, YTO, NYC, YHZ, or YYT is selected as the Home City code. For
more information, see "Daylight Saving Time (DST)" below.
• For information about settings other than the time and date, see the following.
Power Saving: Power Saving Function
4. Press A to exit the setting screen.
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), Rugby
(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.
• The time calibration signals transmitted from Fukushima and Fukuoka/Saga (Japan)
do not include summer time data.
Level 4
Level 3
Level 2
Level 1
44 hours
12 hours
167 hours
46 hours
270 hours
75 hours
– – –
Seconds
Hour
Year
Minutes
Do this:
Use D (east) and B (west).
Press D.
Press D.
Press D.
Use D (+) and B (–).
Press D.
• The default DST setting is Auto DST (AT) whenever you select LIS, LON, MAD,
PAR, ROM, BER, STO, ATH, MOW, HKG, BJS, TPE, SEL, TYO, HNL, ANC, YVR,
LAX, YEA, DEN, MEX, YWG, 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
1. In the Timekeeping Mode, hold down A until the city code starts to flash, which
indicates the setting screen.
2. Press C and the DST setting screen appears.
3. Use D to cycle through the DST settings in the sequence shown below.
Auto DST (AT)
DST off (OFF)
4. When the setting you want is selected, press A to exit the setting screen.
• The DST indicator appears to indicate that Daylight Saving Time is turned on.
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.
Button Operation Tone
The button operation tone sounds any time you press one
of the watch's buttons. You can turn the button operation
tone on or off as desired.
• Even if you turn off the button operation tone, the alarm,
Hourly Time Signal, and Countdown Timer Mode alarm
all operate normally.
To turn the button operation tone on and off
In any mode (except when a setting screen is on the
display), hold down C to toggle the button operation tone
on (MUTE indicator not displayed) and off (MUTE
MUTE indicator
indicator displayed).
• Since the C button is also the mode change button, holding it down to turn the
button operation tone on or off also causes the watch's current mode to change.
• The MUTE indicator is displayed in all modes when the button operation tone is
turned off.
Power Saving Function
When turned on, the Power Saving function enters a sleep
state automatically whenever the watch is left in an area
where it is dark for a certain period. The table below
shows how watch functions are affected by the Power
Saving function.
Power saving indicator
Display
Elapsed Time
in Dark
60 to 70 minutes
Blank, with Power Saving
indicator (PS) flashing
6 or 7 days
Blank, with Power Saving
indicator (PS) not flashing
• 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
1. In the Timekeeping Mode, hold down A until the city
On/Off status
code starts to flash, which indicates the setting screen.
2. Press C nine times until the Power Saving on/off
screen appears.
3. Press D to toggle Power Saving on (ON) and off
(OFF).
4. Press A to exit the setting screen.
• The Power Saving indicator (PS) is on the display in all
modes while Power Saving is turned on.
Auto Return Features
• If you leave the watch in the Alarm Mode for two or three minutes without performing
any operation, it returns to the Timekeeping Mode automatically.
• If you leave the watch with a flashing setting on the display for two or three minutes
without performing any operation, the watch exits the setting screen automatically.
Scrolling
The B and D are used in various modes and setting screens to scroll through data.
In most cases, holding down these buttons during a scroll operation scrolls through
the data at high speed.
Initial Screens
When you enter the World Time or Alarm Mode, the data you were viewing when you
last exited the mode appears first.
DST on (ON)
Operation
All functions enabled, except
for the display
Beeper tone, illumination, and
display are disabled.
5
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