Casio 2654 Alarms, Stopwatch, Backlight, Alarm Operation, About the Auto Light Switch

USER’S GUIDE 2534/2654

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:	Do this:
Stop the countdown operation	Press D.

Resume a stopped countdown operation	Press Dagain.

Display the countdown start time	While the countdown is
	stopped, press B.

Stop the countdown operation and display the reset time	Press B.

Start the countdown from the displayed reset time	Press D.

•The table below describes button operations you can perform during an elapsed time measurement operation in the elapsed time mode.

To do this:	Do this:
Stop the elapsed time operation	Press D.

Resume a stopped elapsed time operation	Press Dagain.

Display the countdown start time	While the elapsed time is
	stopped, press B.

Stop the elapsed time operation and display the reset time	Press B.

Start the countdown from the displayed reset time	Press D.

Alarms

To select the operation of Alarm 1

1.In the Alarm Mode, use Dto select Alarm 1.

2.Press Bto cycle through the available settings in the sequence shown below.

SNZ indicator and one-time alarm on indicatorALM SNZ ALM

One-time alarm on

Snooze alarm on

Alarm off

•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

	Hourly time signal on		1. In the Alarm Mode, use Dto select the Hourly Time
	Hourly time signal on		Signal or the brightness alarm.
	indicator		Signal or the brightness alarm.
			2. Press Bto 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

Alarm number Alarm time

(Hour : Minutes)

You can set five independent Daily Alarms. When an alarm is turned on, the alarm tone sounds when the alarm time is reached. One of the alarms can be configured as a snooze alarm or a one-time alarm, while the other four are

Stopwatch

Timekeeping Mode time

To set an alarm time

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.

• 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.

• All of the operations in this section are performed in the

Alarm Mode, which you enter by pressing C.

1. In the Alarm Mode, use Dto scroll through the alarm

screens until the one whose time you want to set is

Minutes

HoursSeconds

1/100 second

The stopwatch lets you measure elapsed time, split times, and two finishes.

•The display range of the stopwatch is 99 hours, 59 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 elapsed time measurement.

•All of the operations in this section are performed in the Stopwatch Mode, which you enter by pressing C.

displayed.

To measure times with the stopwatch Elapsed Time

x1 x2 x3 x4

ON or OFF	:00	x5

•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 A until the hour setting of the alarm time starts to flash. This indicates the setting screen.

3.Press Cto move the flashing between the hour and minute settings.

4.While a setting is flashing, use D(+) and B(–) 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 A 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,

D	➤D	➤D	➤D	➤B
Start	Stop	Re-start	Stop	Clear
Split Time
D	➤B	➤B	➤D	➤B
Start	Split	Split release	Stop	Clear
	(SPL displayed)
Two Finishes
D	➤B	➤D	➤B	➤B
Start	Split	Stop	Split release	Clear
	First runner	Second runner	Display time of
	finishes.	finishes.	second runner.
	Display time of
	first runner.

Backlight

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

Auto light switch on indicator

The backlight uses an EL (electro-luminescent) panel that causes the entire display to glow for easy reading in the 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 Lto illuminate the display for about one second.

•The above operation turns on the backlight regardless of the current auto light switch setting.

Displaying the Alarm 1 setting screen

To test the alarm

In the Alarm Mode, hold down Dto sound the alarm.

To turn Alarms 2 through 5 on and off

One-time alarm on		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 Bto 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.

About the Auto Light Switch

Turning on the auto light switch causes the backlight to turn on for about one second, 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 turn on the backlight under bright light.

Moving the watch to a position that is parallel to the ground and then tilting it towards you more than 40 degrees causes the backlight to turn on.

Parallel to	More than
ground	40°