Alarms; Stopwatch; To Set An Alarm Time; Alarm Operation - Casio 2531 Operation Manual

Operation Guide 2531
To use the countdown timer
In the Countdown Timer Mode, press D to start the
countdown timer.
• The countdown timer measurement operation continues
even if you exit the Countdown Timer Mode.
• The table below describes button operations you can
perform to control countdown operations.
To do this:
Stop the countdown operation
Resume a stopped countdown operation
Display the countdown start time
Stop the countdown operation and display the reset time
Start the countdown from the displayed reset time
• The table below describes button operations you can perform during an elapsed
time measurement operation in the elapsed time mode.
To do this:
Stop the elapsed time operation
Resume a stopped elapsed time operation
Display the countdown start time
Stop the elapsed time operation and display the reset time
Start the countdown from the displayed reset time

Alarms

Alarm number You can set five independent Daily Alarms. When an
Alarm time alarm is turned on, the alarm tone sounds when the alarm
(Hour : Minutes) time is reached. One of the alarms can be configured as a
snooze alarm or a one-time alarm, while the other four are
one-time alarms.
You can also turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour, and a
brightness alarm that beeps whenever the watch is moved
from an area where it is dark to an area where it is light.
Timekeeping Mode time
• There are five alarm screens numbered 1 through 5. The hourly time signal screen
is indicated by :00. The brightness alarm screen shows ON or OFF.
• When you enter the Alarm Mode, the screen you were viewing when you last exited
the mode appears first.
• All of the operations in this section are performed in the Alarm Mode, which you
enter by pressing B.

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.
x1
ON or OFF
• You can configure Alarm 1 as a snooze alarm or a one-time alarm. Alarms 2
through 5 can be used as one-time alarms only.
• The snooze alarm repeats every five minutes.
2. After you select an alarm, hold down C until the hour setting of the alarm time
starts to flash. This indicates the setting screen.
3. Press B to move the flashing between the hour and minute settings.
4. While a setting is flashing, use D (+) and A (–) to change it.
• 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).
5. Press C to exit the setting screen.

Alarm Operation

The alarm sounds at the preset time for about 10 seconds. In the case of the snooze
alarm, the alarm operation is performed a total of seven times, every five minutes, until
you turn the alarm off or change it to a one-time alarm.
The watch also has a brightness alarm. When turned on, the brightness alarm causes
the watch to beep for 10 seconds when the watch is brought from the dark into the
light. The following are the conditions for brightness alarm operation.
• The watch needs to be in the dark for about 30 to 35 minutes for the brightness
alarm to become activated.
• The brightness alarm sounds about 15 to 20 minutes after the watch is next exposed
to light.
• The brightness alarm sounds only once and then turns off automatically.
Note
• 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 Alarm 1 setting screen
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn Alarms 2 2 2 2 2 through 5 5 5 5 5 on and off
1. In the Alarm Mode, use D to select a one-time alarm
One-time alarm on
(alarm number 2 through 5).
indicator
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 (ALM) on its screen.
• The one-time alarm on indicator is displayed in all
modes.
• If any alarm is on, the alarm on indicator is shown on
the display in all modes.
Do this:
Press D.
Press D again.
While the countdown is
stopped, press A.
Press A.
Press D.
Do this:
Press D.
Press D again.
While the elapsed time is
stopped, press A.
Press A.
Press D.
x2 x3 x4
:00 x5
To select the operation of Alarm 1 1 1 1 1
1. In the Alarm Mode, use D to select Alarm 1.
2. Press A to cycle through the available settings in the sequence shown below.
SNZ indicator and one-time alarm on indicator
ALM SNZ ALM
One-time alarm on Snooze alarm on
• The applicable alarm on indicator (ALM or SNZ ALM) is displayed in all modes
when an alarm is turned on.
• The SNZ indicator flashes during the 5-minute intervals between alarms.
• Displaying the Alarm 1 setting screen while the snooze alarm is turned on
automatically turns off the snooze alarm (making Alarm 1 a one-time alarm).
To turn the hourly time signal and the brightness alarm on and off
1. In the Alarm Mode, use D to select the Hourly Time
Hourly time signal on
Signal or the brightness alarm.
indicator
2. Press A to toggle the displayed item on and off.
• Turning on the Hourly Time Signal displays the hourly
time signal on indicator (SIG) on its screen.
• Turning on the brightness alarm displays the brightness
alarm on indicator (BRT) on its screen.
• The hourly time signal on indicator and brightness alarm
on indicator are displayed in all modes.
Brightness alarm on
indicator

Stopwatch

The stopwatch lets you measure elapsed time, split times,
Minutes
and two finishes.
• The display range of the stopwatch is 99 hours, 59
Hours Seconds
minutes, 59.99 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
1/100 second
elapsed time measurement.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing B.
To measure times with the stopwatch
Elapsed Time
D ➤ D
D ➤
Start Stop Re-start
Split Time
D ➤ A ➤ A
Start Split
Split release
(SPL displayed)
Two Finishes
➤ D
D ➤ A
Start Split Stop
First runner Second runner
finishes. finishes.
Display time of
first runner.
Dual Time
The Dual Time Mode lets you keep track of time in a
Dual time
different time zone.
(Hour : Minutes Seconds)
• The seconds count of the Dual Time is synchronized
with the seconds count of the Timekeeping Mode.
To set the Dual Time
1. Press B to enter the Dual Time Mode.
2. Use A, C, and D to set the Dual Time Mode time.
• Each press of D (+) and A (–) changes the time
setting in 30-minute increments.
• Pressing C sets the Dual Time Mode to the same time
Timekeeping Mode time
as the Timekeeping Mode.
Backlight
The backlight uses an EL (electro-luminescent) panel that
Auto light switch
causes the entire display to glow for easy reading in the
on indicator
dark. The watch's auto light switch automatically turns on
the backlight when you angle the watch towards your face.
• The auto light switch must be turned on (indicated by
the auto light switch on indicator) for it to operate.
• See "Backlight Precautions" for other important
information about using the backlight.
To turn on the backlight manually
In any mode, press L to illuminate the display for about
one second.
• The above operation turns on the backlight regardless of
the current auto light switch setting.
Alarm off
➤ D ➤ A
Stop Clear
D ➤ A
➤
Clear
Stop
➤ A ➤ A
Split release Clear
Display time of
second runner.
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