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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.
Charging is reduced significantly even if
the face is covered only partially.
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.
• The special rechargeable (secondary) battery used by your watch is not
intended to be removed or replaced by you. Use of a rechargeable battery
other than the special one specified for this watch can damage the watch.
• The current time and all other settings return to their initial factory defaults
whenever battery power drops to Level 5 and when you have the battery
replaced.
• Turn on the watch's Power Saving function and keep it 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 Indicator and Recover Indicator
The battery power indicator shows you the current power level of the
rechargeable battery.
Level
Battery Power Indicator
1
2
3
Battery power indicator
(Charge Soon Alert)
4
(Charge Soon Alert)
5
•
flashes on the display in the Timekeeping Mode when battery is at
Level 3.
•
at Level 3 and the flashing charge indicator (CHG) at Level 4 tell you
that battery power is very low, and that exposure to bright light for charging
is required as soon as possible.
• At Level 5, 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 4 (indicated by the flashing charge indicator (CHG)) from
Level 5. You will not be able to configure any of the other settings until the
battery reaches Level 3 (no charge indicator) after dropping to Level 5.
• Leaving the watch in direct sunlight or some other very strong light source
can cause the battery power indicator to show a reading that is
momentarily higher than the actual battery level. The correct battery power
indicator should appear after a few minutes.
• If you use the illumination or alarms a number of times during a short
period, the charge indicator (CHG) flashes and the following operations
become disabled until battery power recovers.
Illumination
Beeper tone
Time calibration signal reception
After some time, battery power will recover and the charge indicator (CHG)
will disappear, indicating that the above functions are enabled again.
Operation Guide 3127
Solar cell
Function Status
All functions enabled.
All functions enabled.
Alarm, hourly time
l
signal, illumination and
time calibration signal
reception disabled.
All functions, including
auto light swich,
disabled.
All functions, including
timekeeping, disabled
and initialized.
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 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.
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)
• Since these are the specs, we can include all the technical details.
• Display on 18 hours per day, sleep state 6 hours per day
• 1 illumination operation (1.5 seconds) per day
• 10 seconds of alarm operation per day
• 10 minutes of signal reception per day
• Stable operation is promoted by frequent exposure to light.
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 Level 4 Level 3
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
122 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 also can 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.
• In the Timekeeping Mode, you can press A to toggle the display contents
as shown below.
Date
Month – Day
Press A.
PM indicator
Hour : Minutes
• Pressing D in the Timekeeping Mode will display the Last Signal screen.
Press D.
Approximate Exposure Time
5 minutes
24 minutes
48 minutes
8 hours
Level 2
Level 1
43 hours
12 hours
161 hours
45 hours
261 hours
72 hours
– – –
Day of the Week
Day of week
5
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