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Operation Guide 3107
To turn Alarms 2 through 5 on and off
1. In the Alarm Mode, use D to select a one-time alarm
(alarm number 2 through 5).
2. Press A to toggle the displayed alarm on and off.
• Turning on a one-time alarm (2 through 5) displays the
one-time alarm on indicator on its screen.
• The one-time alarm on indicator is displayed in all
modes.
• If any alarm is on, the one-time alarm on indicator is
shown on the display in all modes.
One-time alarm on
indicator
To select the operation of Alarm 1
1. In the Alarm Mode, use D to select Alarm1.
2. Press A to cycle through the available settings in the sequence shown below.
Snooze alarm on indicator and one-time alarm on indicator
One-time alarm on
Snooze alarm on
• The applicable alarm on indicator is displayed in all modes when an alarm is turned
on.
• The snooze alarm on indicator flashes during the 5-minute intervals between alarms.
• Displaying the Alarm1 setting screen while the snooze alarm is turned on
automatically turns off the snooze alarm (making Alarm1 a one-time alarm).
To turn the hourly time signal on and off
1. In the Alarm Mode, use D to select the Hourly Time
Hourly time signal on
Signal (:00).
indicator
2. Press A to toggle it on and off.
• Turning on the Hourly Time Signal displays the hourly
time signal on indicator on its screen.
• The hourly time signal on indicator is displayed in all
modes when the Hourly Time Signal is turned on.
Illumination
The watch has an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark.
• See "Illumination Precautions" for other important
information.
To turn on illumination
In any mode (except when a setting is on the display),
press B to illuminate the display for about one second.
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 if the face is only partially
covered.
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 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 Charge Indicator
The battery power indicator shows you the current power level of the rechargeable
battery.
Level
Battery Power Indicator
1
2
3
(Charge Soon Alert)
Battery power indicator
4
(Charge Soon Alert)
5
• The
• The
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.
After some time, battery power will recover and the charge indicator (CHG) will
disappear, indicating that the above functions are enabled again.
Alarm off
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 nine 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)
• For details about the battery operating time and daily operating conditions, see the
"Power Supply" section of the Specifications.
• 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
Solar cell
(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.
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.
• In the Timekeeping Mode, you can press A to toggle the display contents as shown
below.
• Pressing D in the Timekeeping Mode will display the Last Signal screen.
Function Status
All functions enabled.
All functions enabled.
Alarm, hourly time signal,
illumination and time calibration
signal reception disabled.
All functions disabled.
All functions, including
timekeeping, disabled and
initialized.
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
Illumination
Beeper tone
Time calibration signal reception
Approximate Exposure Time
Level 5
Level 4
2 hours
6 hours
9 hours
95 hours
Date
Month – Day
Press A.
Press D.
Approximate Exposure Time
5 minutes
24 minutes
48 minutes
8 hours
Level 3
Level 2
Level 1
33 hours
9 hours
124 hours
34 hours
201 hours
56 hours
– – –
Day of the Week
Day of week
4
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