User Manual
USER’S GUIDE 2539
3
Alarm Operation
All mode icons start to flash starting from the point the Timekeeping Mode time
reaches one hour before an alarm time. This pre-alarm feature lets you know that an
alarm time is about to be reached.
When the actual alarm time is reached, the alarm tone sounds at the preset time for
20 seconds, regardless of the mode the watch is in. In the case of the snooze alarm,
the alarm repeats up to seven times every five minutes until the alarm is turned off.
• To stop the alarm tone after it starts to sound, press any button.
• The pre-alarm feature works in the Timekeeping Mode only. To stop the pre-alarm
after it starts, press any button. Note, however, that pressing C also changes to the
e-DATA MEMORY Mode, while pressing D also changes the display format.
• If you input reminder text for an alarm, the text appears for one minute on the
Timekeeping Mode screen when the alarm time is reached. You can clear the
reminder text display by changing the Timekeeping Mode screen format or by exiting
the Timekeeping Mode.
• 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
SNZ
setting screen
Changing the DST setting of the Home City code in the World Time Mode
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn an alarm on and off
1. In the Alarm Mode, use D and B to select an alarm.
2. Press A to toggle it on and off.
• Turning on a one-time alarm (
AL1through ) displays the one-time alarm on
indicator (
x
) on its Alarm Mode screen. Turning on the snooze alarm displays the
snooze alarm on indicator (
) on its Alarm Mode screen.
• The applicable alarm on indicator (
x
or ) is displayed in all modes when an
alarm is turned on.
• The applicable alarm on indicator (
x
or ) flashes while the alarm is sounding.
• The SNZ indicator flashes during the 5-minute intervals between alarms.
To turn the Hourly Time Signal on and off
1. In the Alarm Mode, use D and B to select the Hourly
Time Signal (
).
2. Press A to toggle it on (OZ) and off (OFF).
• The Hourly Time Signal on indicator (
y
) is shown on the
display in all modes while this function is turned on.
Hourly time signal on
indicator
Hours Minutes
Seconds
Countdown Timer
You can set the countdown timer within a range of
1 minute to 24 hours. An alarm sounds when the
countdown reaches zero.
• You can also select auto-repeat, which automatically
restarts the countdown from the original value you set
whenever zero is reached.
• The initial default countdown start time when you
purchase the watch or after you have its battery
replaced is 15 minutes.
• On the Countdown Timer Mode screen, the graphic
analog hand moves counter-clockwise to count down
the seconds.
• Countdown timer functions are available in the
Countdown Timer Mode, which you can enter using C.
To use the countdown timer
Press D while in the Countdown Timer Mode to start the countdown timer.
• When the end of the countdown is reached 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.
• When the end of the countdown is reached and auto-repeat is turned on, the alarm
sounds, but the countdown starts again automatically whenever the countdown
reaches zero.
• The countdown timer measurement operation continues even if you exit the
Countdown Timer Mode.
• Press D while a countdown operation is in progress to pause it. Press D again to
resume the countdown.
• To completely stop a countdown operation, first pause it (by pressing D), and then
press B. This returns the countdown time to its starting value.
To set up the countdown timer
1. In the Countdown Timer Mode, hold down A until the
hour setting of the countdown start time starts to flash,
which indicates the setting screen.
2. Press C to move the flashing in the sequence shown
below to select other settings.
Auto-repeat
Minutes
Hours
Setting
Hours, Minutes
Auto-repeat
Screen Button Operations
Use D (+) and B (–) to change the setting.
Press D to toggle auto-repeat on (OZ) and off (OFF).
• To specify a countdown start time of 24 hours, set A:AA.
4. Press A to exit the setting screen.
• The auto-repeat on indicator (
) appears on the display while this function is
turned on.
• Frequent use of auto-repeat and the alarm can run down battery power.
Seconds
Seconds
Minutes
Minute
s
Hours
1/100 second
More than 60 minutes
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 seconds.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
• Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
• On the Stopwatch Mode screen, the graphic analog
hand moves clockwise to count the seconds.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
To measure times with the stopwatch
Elapsed Time
Start
Stop Re-start Stop Clear
Start
Split
(SPL displayed)
Split release Stop Clear
Start
Split Stop Split release Clear
Split Time
Two Finishes
First runner
finishes.
Display time of
first runner.
Second runner
finishes.
Display time of
second runner.
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 Display
Auto Display continually changes the contents of the
digital display.
To turn off Auto Display
Press any button (except for L) to turn off Auto Display.
This returns to the Timekeeping Mode.
To turn on Auto Display
Hold down C for about two seconds until the watch
beeps.
• Note that Auto Display cannot be performed while a
setting screen is on the display.
Auto Return Features
• If you leave the watch in the e-DATA MEMORY or Alarm Mode for two or three
minutes without performing any operation, it automatically changes to the
Timekeeping Mode.
• If you leave a screen with flashing digits or a cursor on the display for two or three
minutes without performing any operation, the watch automatically saves any
settings you have made up to that point and exits the setting screen.
Data and Setting Scrolling
The B and D buttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Initial Screens
When you enter the e-DATA MEMORY, World Time, or Alarm Mode, the data you were
viewing when you last exited the mode appears first.
Timekeeping
• Resetting the seconds to 00 while the current count is in the range of 30 to 59
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to 00 without changing the minutes.
• The year can be set in the range of 2000 to 2039.
• The watch’s built-in full automatic calendar automatically 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.
e-DATA MEMORY Management
e-DATA MEMORY can hold up to 315 characters total, while each record can contain
up to 63 characters. The maximum number of records depends on the number of
characters per record, as shown below.
• 63 characters per record: 5 records
• 7 characters per record: 40 records
When you purchase the watch, e-DATA MEMORY contains one record, with the text:
http://world.casio.com. This text is also stored automatically whenever memory
contents are cleared by battery replacement.
3. While a setting is flashing, use D and B to change it as described below.