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Operation Guide 2628
4
To set an alarm time
1.In the Alarm Mode, use D to scroll through the alarm
screens until the one whose time you want to set is
displayed.
2.After you select an alarm, hold down A until the hour
setting of the alarm time starts to flash, which indicates
the setting screen.
• This operation turns on the alarm automatically.
3.Use C to move the flashing between the hour and
minute settings.
AL1 AL2 AL3
SIG SNZ AL4
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4. While a setting is flashing, use D (+) and B (–) to change it.
5. Press A to exit the setting screen.
• When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (no indicator) or p.m. (P indicator).
Alarm Operation
The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in. In the case of the snooze alarm, the alarm operation is performed a total
of seven times, every five minutes, or until you turn the alarm off.
• Pressing any button stops the alarm tone operation.
• Performing any one of the following operations during a 5-minute interval between
snooze alarms cancels the current snooze alarm operation.
Displaying the Timekeeping Mode setting screen
Displaying the snooze alarm setting screen
To test the alarm
In the Alarm Mode, hold down B to sound the alarm.
To turn an alarm on and off
1.In the Alarm Mode, use D to select an alarm.
2.Press B to toggle it on and off.
• Turning on a one-time alarm (
AL1, AL2, AL3,
AL4) displays the alarm on indicator on its Alarm
Mode screen. Turning on the snooze alarm (
SNZ)
displays the alarm on indicator and snooze alarm
indicator on its Alarm Mode screen.
• In all modes, the alarm on indicator is shown for any
alarm that is currently turned on. When the snooze
alarm is on, the snooze alarm indicator is displayed in all
modes.
• The alarm on indicator flashes while the alarm is
sounding.
• The snooze alarm indicator flashes during the 5-minute
intervals between alarms.
Snooze alarm indicator
Alarm on indicator
To turn the Hourly Time Signal on and off
1.In the Alarm Mode, use D to select the Hourly Time
Signal (
SIG
).
2.Press B to toggle it on (Hourly Time Signal on
indicator displayed) and off (Hourly Time Signal on
indicator not displayed).
• The Hourly Time Signal on indicator is displayed in all
modes when the Hourly Time Signal is turned on.
Hourly time signal
on indicator
Stopwatch
The stopwatch lets you measure elapsed time, split times,
and two finishes.
• The display range of the stopwatch is 23 hours, 59
minutes, 59.99 seconds.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
• The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
1/100 second
Hours
Timekeeping
Mode time
Seconds
Minutes
D
Start Stop
Elapsed Time
➤
Re-start Clear
D
➤
Stop
D
➤
D
➤
B
Split Time
D
Start Split
➤
Split release
Clear
B
➤
Stop
B
➤
D
➤
B
Two Finishes
D
Start Split
➤
Stop
Clear
B
➤
Split release
D
➤
B
➤
B
First runner
finishes.
Display time of
first runner.
Second runner
finishes.
Display time of
second runner.
To measure times with the stopwatch
(SPL displayed)
Illumination
The watch has an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark. The watch’s auto light switch illuminates the display
automatically when you angle the watch towards your
face.
• The auto light switch must be turned on (indicated by
the auto light switch indicator) for it to operate.
• See “Illumination Precautions” for other important
information.
To turn on illumination manually
In any mode, press L to illuminate the display for about
one second.
• The above operation turns on illumination regardless of
the current auto light switch setting.
Auto light switch
indicator
Parallel to
ground
More than
40°
About the Auto Light Switch
Turning on the auto light switch causes illumination to turn on whenever you position
your wrist as described below in any mode. Note that this watch features a “Full Auto
EL Light”, so the auto light switch operates only when available light is below a certain
level. It does not illuminate the display under bright light.
Moving the watch to a position that is parallel to the ground and then tilting it
towards you at more than 40 degrees causes illumination to turn on.
• Wear the watch on the outside of your wrist.
Warning!
• Always make sure you are in a safe place whenever you are reading the watch
using the auto light switch. Be especially careful when running or engaged in
any other activity that can result in accident or injury. Also take care that
sudden illumination by the auto light switch does not startle or distract others
around you.
• When you are wearing the watch, make sure that its auto light switch is turned
off before riding on a bicycle, or operating a motorcycle or any other motor
vehicle. Sudden and unintended operation of the auto light switch can create a
distraction, which can result in a traffic accident and serious personal injury.
To turn the auto light switch on and off
In any mode (except when a setting screen is on the display), hold down L for about
two seconds to toggle the auto light switch on (auto light switch indicator displayed)
and off (auto light switch indicator not displayed).
• The auto light switch indicator remains in all modes while the auto light switch is
turned on.
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.
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 4 and when you have the battery replaced.
• Turn on the watch’s Power Saving function and keep it in an area exposed to bright
light when storing it for long periods. This helps to keep the rechargeable battery
from going dead.
Function Status
All functions enabled.
All functions enabled.
Alarm, hourly time signal,
illumination, calibration
signal reception, display, and
buttons are disabled.
All functions, including
timekeeping, disabled and
initialized.
Battery Power Indicator and Recover Indicator
The battery power indicator shows you the current power level of the rechargeable
battery.
Level
1
2
3
4
Battery Power Indicator
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Battery power indicator
Recover indicator
(Charge Soon Alert)