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1803-4
3. Press D to increase the selection or B to decrease it. Holding down either
button changes the selection at high speed.
• To set the starting value of the countdown time to 24 hours, set
0:00 00.
4. After you set the countdown time, press A to return to the Countdown Alarm
Mode.
• If you do not operate any button for a few minutes while a selection is flashing,
the flashing stops and the watch goes back to the Countdown Alarm Mode
automatically.
To use the countdown timer
Press L while in the Countdown Alarm Mode to start the countdown timer.
• When the countdown reaches zero and auto repeat is turned off, the alarm
sounds for 10 seconds or until you stop it by pressing any button. The
countdown time is automatically reset to its starting value after the alarm
stops.
• Press L while a countdown operation is in progress to pause it. Press L
again to resume the countdown.
• To completely stop a countdown operation, first pause it (by pressing L),
and then press B. This returns the countdown time to its starting value.
To turn auto repeat on and off
1. Hold down A while in the Countdown Alarm
Mode until the hours digit starts to flash on
the display.
2. Press L to turn auto repeat on (
AUTO
displayed) and off (AUTO not displayed).
3. Press A to return to the Countdown Alarm
Mode.
• The auto repeat on indicator (
AUTO)
appears in the upper part of the display only
in the start time setting screen (starting time
digits flashing).
• When the end of the countdown is reached while auto repeat is on, the alarm
sounds, but the countdown starts again automatically whenever the countdown
reaches zero. You can stop timing by pressing L, and manually reset to the
starting countdown time by pressing B.
• Normally, an alarm tone sounds for about 10 seconds when the end of the
countdown is reached. If you use auto repeat with start time of 10 seconds or
less, the alarm tone sounds for only one second.
• Frequent use of auto repeat with a short countdown time can reduce the
charge of the storage battery and cause the countdown time alarm to become
disabled, so it does not sound.
To turn progress beeper on and off
Press B while in the Countdown Alarm Mode (while the countdown is completely
stopped or ongoing) to turn the progress beeper on (
displayed) and off (
not displayed).
• When the progress beeper is turned on, the watch beeps as the countdown
time passes the 10, 5, 4, 3, 2, and 1-minute marks, and the 50, 40, 30, 20,
10, 5, 4, 3, 2, and 1-second marks.
A
CD
L
B
Auto repeat on indicator
BATTERY
This watch is equipped with a solar cell and a
storage battery (secondary battery) that is
charged by the electrical power produced by the
solar cell.
• The area outside of the LCD digital areas is a
solar cell panel that picks up available light to
charge the storage battery.
• A Sleep Mode is provided to conserve battery
power.
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 storage
battery power to run down. Be sure that the watch is normally exposed to
light whenever possible.
• This watch employs a solar cell that converts light into electricity that charges
a built-in storage battery. Normally, the storage battery should not need
replacement, but after very long use over a number of years, the storage
battery may lose its ability to achieve a full charge. Should you notice problems
with getting the storage battery to a full charge, contact your dealer or CASIO
distributor about having the storage battery replaced.
• The storage battery should be replaced with a CASIO-specified ML-2020
battery only. Other storage batteries can cause damage to the watch.
• Be sure to put the watch into its Sleep Mode and keep in an area normally
exposed to light when storing it for long periods. This helps to keep the storage
battery from going dead.
A
CD
L
B
Solar cell panel
Battery power indicator
Level Indicator Functional Status
1
2
3
4
5
All functions enabled.
All functions enabled.
Alarms, Hourly Time Signal, backlight disabled.
Alarms, Hourly Time Signal, backlight, display disabled;
timekeeping enabled.
Alarms, Hourly Time Signal, backlight, display, timekeeping
disabled.
Battery Power Indicator
The battery power indicator on the display shows you the current status of the
storage battery’s power.
• At Level 4, the display is disabled but timekeeping and other functions continue
to operate internally. Pressing any button causes the Timekeeping Mode
screen to appear for two or three minutes.
• At Level 5, all functions are disabled. Functions are enabled once again after
the storage battery is charged, but anything previously stored in memory is
lost. Because of this, you must set the current time and alarms, and re-input
Telememo data items after the storage battery is charged.
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 storage
battery.
Warning!
Leaving the watch in sunlight to charge its storage battery can cause it to
become quite hot. Take care when handling the watch to avoid burn injury.
• On the dashboard of a car parked in direct sunlight
• Too close to an incandescent lamp
• Under direct sunlight or in any other area exposed to intense heat for long
periods
Charging Guide
Required charge time when the backlight is used for two seconds and the alarm
sounds for 20 seconds per day:
• Approximately 8 hours of 500 lux (indoor fluorescent lighting) per day
• Approximately 1 hour 15 minutes of 3,000 lux (direct fluorescent lighting) per
day
• Approximately 50 minutes of 36,000 lux (afternoon outdoor sunlight) per week
(7 minutes per day)
Required charge time when the backlight is used for 30 seconds and the alarm
sounds for 20 seconds per day:
• Approximately 4 hours 30 minutes of 3,000 lux (direct fluorescent lighting)
per day
• Approximately 2 hours 20 minutes of 36,000 lux (afternoon outdoor sunlight)
per week (20 minutes per day)
Using the Sleep Mode
In any mode (except while figures are flashing
on the display for input), hold down C for about
two seconds.
• This enters the Sleep Mode, which causes all
figures (except SLEEP) to disappear from the
display. Timekeeping and other functions
continue to be performed internally, however.
• Alarms, the Hourly Time Signal, and the
backlight are disabled while the watch is in
the Sleep Mode.
• Pressing any button (except A) exits the
Sleep Mode and enters the Timekeeping
Mode.
About Auto Display
Auto Display is a demonstration feature that continually changes the contents
of the digital display. Note that you cannot use any of the watch’s other functions
while Auto Display is operating.
To turn off Auto Display
Hold down A for about two seconds until the watch beeps.
To turn on Auto Display
1. In any mode (except while figures are flashing on the display for input), hold
down C for about two seconds to enter the Sleep Mode.
2. Hold down A for about two seconds until the watch beeps. This indicates
that Auto Display is on.
• You cannot turn on Auto Display while a setting screen (indicated by flashing
digits) is on the display.
• Leaving the watch in a dark area can cause Auto Display operation to stop.
Normal operation should resume when the watch is again exposed to light.
• Auto Display cannot be turned on while the storage battery is at Level 4 or
Level 5. Auto Display also turns off automatically whenever the storage battery
drops to Level 4 or Level 5.
A
CD
L
B
[Sleep Mode]