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Operation Guide 4719
4
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.
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 eight months.
• 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.
• Since these are the specs, we can include all the technical details.
• Watch is not exposed to light
• Internal timekeeping
• Analog hands operational 18 hours per day, sleep state 6 hours per day
• 10 seconds of alarm operation per day
• 1 illumination operation (1.5 seconds) per day
• 1 time calibration reception per day
• Stable operation is promoted by frequent charging.
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
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
27 hours
133 hours
– – –
– – –
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
Level 3 Level 2 Level 1
2 hours
5 hours
9 hours
109 hours
Exposure Level
(Brightness)
▲
▲
▲
Timekeeping
Use the Timekeeping Mode to set and view the current
time and date. This section also explains how to set the
current date and time manually.
• All of the operations in this section are performed in the
Timekeeping Mode, which you enter by pressing C.
Hour hand
Date
Minute hand
Second hand
24-hour hand
Setting the Time and Date Manually
Make sure you select your Home Time Zone before you change the current time and
date settings. Dual Time Mode times are all displayed in accordance with the
Timekeeping Mode settings. Because of this, Dual Time Mode times will not be correct
if you do not select the proper Home Time Zone before setting the time and date in the
Timekeeping Mode.
• When setting the time and date, you also can configure settings for your Home Time
Zone (the time zone where you normally use the watch) and summer time (Daylight
Saving time or DST).
To set the time and date manually
1.In the Timekeeping Mode, hold down A until the GMT
differential value starts to flash, which indicates the
setting screen.
• The second hand will move at high speed to the 12
o’clock position, where it will stop.
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DST indicator
Minus sign
• The GMT differential value indicates the time difference in hours between
Greenwich Mean Time and the currently selected time zone.
• The DST indicator indicates that Daylight Saving Time (summer time) is turned on
for the currently selected time zone.
To do this:
Change the time zone
Toggle between Daylight Saving Time ( ),
Standard Time ( ), or Auto DST ( )
Change the minutes (time)
Change the year
Change the month
Change the day
Do this:
Press B.
Press B.
Press B.
Press B.
Press B.
Press B.
5. Press A to exit the setting screen.
• When you exit the setting screen, the analog hands are adjusted automatically to
match the digital time.
Screen
• Auto DST ( ) can be selected only while +0.0, +1.0, or +2.0 (+1.0, +2.0, or +3.0
while DST is turned on) is selected as the Home Time Zone. For more information,
see “Daylight Saving Time (DST)” below.
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 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 signal it receives.
• The auto DST setting can be turned on only while +0.0, +1.0, or +2.0 (+1.0, +2.0, or
+3.0 while DST is turned on) is selected as the Home Time Zone.
• If you experience problems receiving the time calibration signal in your area, it is
probably 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 GMT differential value starts to
flash, which indicates the setting screen.
2. Press C to display the DST setting screen.
3. Press B to cycle through the DST settings in the sequence shown below.
Auto DST ( ) DST off ( ) DST on ( )
4. Press A to exit the setting screen.
• The DST indicator appears on the display to indicate that Daylight Saving Time is
turned on.
• Turning on DST causes the GMT differential value to be increased by one.
• The
(GMT: Greenwich Mean Time) time zone cannot be switched between
Standard Time and Daylight Saving Time.
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
Power Saving enters a sleep state automatically whenever the watch is left for a
certain period in an area where it is dark. The table below shows how watch functions
are affected by Power Saving.
• There actually are two sleep state levels: “second hand sleep” and “function sleep”.
• Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.
Operation
Second hand is stopped and display is blank. All other
functions are enabled.
• All functions, including analog timekeeping, disabled
• Internal timekeeping maintained
Elapsed Time in Dark
60 to 70 minutes
(second hand sleep)
6 or 7 days
(function sleep)
• 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.
Auto Return Features
• If you leave the watch in the Alarm or Hand Setting Mode for two or three minutes
without performing any operation, it returns to the Timekeeping Mode automatically.
• If you do not perform any operation for about two or three minutes while a setting
mode is selected, the watch will exit the setting mode automatically.
Scrolling
• The B button is used to change the hand setting in various setting modes. In most
cases, holding down this button will start high-speed movement of the applicable
hand(s).
• High-speed movement of hands will continue until you press any button, or until the
moving hand(s) finishes one complete cycle.
- One complete cycle for the hands is one revolution (360 degrees) or 24 hours.
• When battery power is at Level 2, time calibration signal reception is disabled.
• Alarm operation can cause hand movement to stop due to the sudden temporary
drop in battery power. This does not indicate malfunction, and normal operation will
resume when the watch is exposed to light. Though hand movement stops,
timekeeping continues internally, and the hands will be adjusted to the correct
setting when normal operation returns.
• At Level 3, all functions are disabled and settings return to their initial factory
defaults. Functions are enabled once again after the rechargeable battery is
charged, but you need to set the time and date, after the battery reaches Level 1
from Level 3.
• Leaving the watch in direct sunlight or some other very strong light source can
cause the battery power indication to show a reading that is momentarily higher than
the actual battery level. The correct battery power indication should appear after a
few minutes.
2. Use B to select the time zone you want to use as your Home Time Zone.
• For full details about GMT differential values, see the “Time Zone Table”.
3. Press C to move the flashing in the sequence shown below to select other
settings.
GMT differential
value
DST
Day
Minutes
YearMonth
4. When the setting you want to change is flashing, use B to change it as described
below.
GMT differential value
: +2.0 : –4.0