Operation Guide 4766
4
5. Use
D
(+) and
B
(–) to change the time (hour and
minute) setting.
•
As you set the time, take care to ensure that the 24-
hour hand also is at the correct position.
6. After the time setting is the way you want, press
C
.
•
The watch will enter the date setting mode.
7. Use
D
(+) and
B
(–) to change the date setting.
8. After the date setting is the way you want, press
C
.
•
The watch will enter the day of the week setting
mode.
9. Use
D
(+) to change the day of the week setting.
•
Pressing
C
will return to the city code setting mode.
10. After all the settings are the way you want, press
A
to enter the Timekeeping
Mode.
•
You can press
A
at any time during the above procedure to return to the
Timekeeping Mode.
30
Stopwatch second hand
Power Supply
This watch is equipped with a solar cell and a special rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell. The
illustration shown below shows how you should position the watch for charging.
Example:
Orient the watch so its face is
pointing at a light source.
•
The illustration shows how to position
a watch with a resin band.
•
Note that charging efficiency drops
when any part of the solar cell is
blocked by clothing, etc.
•
You should try to keep the watch
outside of your sleeve as much as
possible. Even if the face of the watch
is blocked from light only partially,
charging will be reduced significantly.
Solar cell
Important!
•
Storing the watch for long periods in an area where there is no light or wearing it in
such a way that it is blocked from exposure to light can cause rechargeable battery
power to run down. Make sure that the watch is exposed to bright light whenever
possible.
•
This watch uses a special rechargeable battery to store power produced by the solar
cell, so regular battery replacement is not required. However, after very long use, the
rechargeable battery may lose its ability to achieve a full charge. If you experience
problems getting the special rechargeable battery to charge fully, contact your dealer
or CASIO distributor about having it replaced.
•
Never try to remove or replace the watch’s special battery yourself. Use of the wrong
type of battery can damage the watch.
•
The current time and all other settings return to their initial factory defaults whenever
battery power drops to Level 3 and when you have the battery replaced.
•
Keep the watch in an area normally exposed to bright light when storing it for long
periods. This helps to keep the rechargeable battery from going dead.
Battery Power Levels
The movement of the analog hands indicates the current battery power level.
•
The second hand jumping every two seconds (Level 2) indicates that battery power
is quite low. Expose the watch to light as soon as possible to charge the battery.
•
When battery power is at Level 2, time calibration signal reception is disabled.
Hand Movement
Normal.
•
Second hand jumps
every 2 seconds.
•
Date changes to home
position.
•
Second hand stopped.
•
Hour and minute hands
stopped at 12 o’clock.
Level
1
2
3
Function Status
All functions enabled.
All functions disabled,
except for analog
timekeeping and
stopwatch.
All functions disabled.
30
Jumps 2 seconds
•
At Level 3, all functions are disabled and settings return to their initial factory
defaults. The watch will continue to keep time internally for about one month after the
battery drops to Level 3. If you recharge the battery sufficiently during this period,
the analog hands will move automatically to the correct setting and normal
timekeeping will resume.
•
Internal timekeeping will stop and the Home City setting will change to Tokyo (
TYO
)
automatically if you leave the watch in the dark for about one month after the battery
level drops to Level 3. With this Home City code setting, the watch is configured to
receive the time calibration signals of Japan. If you are using the watch in North
America or Europe, you will need to change the Home City code setting to match
your location whenever the battery drops to Level 3.
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 five 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
•
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.
20 hours
76 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
1 hour
2 hours
4 hours
37 hours
Exposure Level
(Brightness)
▲
▲
▲
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.
Auto Return Feature
•
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
D
and
B
button are used to change the hand setting in various setting modes.
In most cases, holding down these buttons will start high-speed movement of the
applicable hand(s) and day.
•
High-speed movement of the hands and day will continue until you press any button,
or until the moving hand(s) and day finish one complete cycle.
– One complete cycle for the hands is one revolution (360 degrees) or 24 hours.
– One complete cycle for the day is 31 days.
Radio-controlled Atomic Timekeeping Precautions
•
Strong electrostatic charge can result in the wrong time being set.
•
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, 2001 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 time within ±20 seconds a month at normal temperature.
Timekeeping
•
The year can be set in the range of 2001 to 2099.
•
The watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to change
it except after you have the watch’s battery replaced or when battery power drops to
Level 3.
•
The date will change automatically when the current time reaches midnight. The
date change at the end of the month may take more time than normal.
•
The current time for all city codes in the Timekeeping Mode is calculated in
accordance with the Greenwich Mean Time (GMT) differential of each city, based on
your Home City time setting.
•
GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC
*
) data.
*
UTC is the world-wide scientific standard of timekeeping. It is based upon carefully
maintained atomic (cesium) clocks that keep time accurately to within
microseconds. Leap seconds are added or subtracted as necessary to keep UTC
in sync with the Earth’s rotation. The reference point for UTC is Greenwich,
England.