Casio 5288 Operation Manual Download Page 4

Operation Guide 5288

E-39

To change the illumination duration

 In the Timekeeping Mode, hold down 

1. 

A

 until the seconds start to fl ash. This is 

the setting mode.

 Press 

2. 

C

 nine times so the illumination duration setting mode is on the display.

 Press 

3. 

D

 to toggle the illumination duration between 1.5 seconds ( ) and 

3 seconds ( ).

 After the settings are the way you want, press 

4. 

A

 to exit the setting mode.

Illumination Precautions

 Illumination may be hard to see when viewed under direct sunlight.

 

 Illumination turns off automatically whenever an alarm sounds.

 

 Frequent use of illumination runs down the battery.

 

E-38

Illumination

The face of the watch is illuminated for easy reading in 
the dark.

To turn on illumination

In any mode (except when a setting mode, with fl ashing 
digits is on the display), press 

B

 to illuminate the display.

 You can use the procedure below to select either 

 

x

1.5 seconds or 3 seconds as the illumination duration. 
When you press 

B

, the display will remain illuminated 

for about 1.5 seconds or 3 seconds, depending on the 
current illumination duration setting.

E-37

 If you need to advance the analog time setting a long way, hold down 

 

x

D

 until 

the time starts advancing at high speed, and then press 

B

. This locks the high-

speed hand movement, so you can release the two buttons. High-speed hand 
movement continues until you press any button. It will also stop automatically 
after the time advances 12 hours or if an alarm (daily alarm, Hourly Time Signal, 
or countdown beeper) starts to sound.

 Press 

4. 

A

 to exit the setting mode.

 The watch will automatically adjust the minute hand slightly to match its internal 

 

x

second count when you exit the setting mode.
 To return to the Timekeeping Mode, press 

 

x

C

.

E-36

Adjusting the Analog Hand Setting

Use the following procedure to adjust the analog hands so their settings match the 
digital time.

To adjust the analog time

 Use 

1. 

C

 to select the Hand Setting Mode as shown on 

page E-11.

 Hold down 

2. 

A

 until the current digital time starts to 

fl ash, which indicates the analog setting mode.

 Press 

3. 

D

 to advance the analog time setting by 

20 seconds.

 Holding down 

 

x

D

 advances the analog time setting 

at high speed.

E-35

 Press 

5. 

A

 to exit the setting mode.

To test the alarm

In the Alarm Mode, hold down 

D

 to sound the alarm.

To turn an alarm and the Hourly Time Signal on and off

 In the Alarm Mode, use 

1. 

D

 to select an alarm or the 

Hourly Time Signal.

 When the alarm or the Hourly Time Signal you want is 

2. 

selected, press 

A

 to toggle it between on and off.

 The alarm on indicator (when any alarm is on), snooze 

 

x

alarm indicator (when the snooze alarm is on), and the 
Hourly Time Signal on indicator (when the Hourly Time 
Signal is on) are shown on the display in all modes.

To stop the alarm

Press any button.

Hourly time signal 
on indicator

Snooze alarm indicator

E-34

To set an alarm time

 In the Alarm Mode, use 

1. 

D

 to scroll through the alarm 

screens until the one whose time you want to set is 
displayed.

AL1

AL3

SNZ

AL2

AL4

SIG

D

D

D

D

D

D

 Hold down 

2. 

A

 for about two seconds until the alarm time starts to fl ash. This is 

the setting mode.

 Press 

3. 

C

 to move the fl ashing between the hour and minute settings.

 While a setting is fl ashing, use 

4. 

D

 (+) and 

B

 (–) to change it.

 When setting the alarm time using the 12-hour format, take care to set the time 

 

x

correctly as a.m. (no indicator) or p.m. (

P

 indicator).

Alarm ON/OFF indicator

E-33

To enter the Alarm Mode

Use 

C

 to select the Alarm Mode as shown on page E-11.

 The snooze alarm screen is indicated by 

 

x

SNZ

, while the other alarm screens are 

numbered 

AL1

 through 

AL4

. The Hourly Time Signal screen is indicated by 

SIG

.

 When you enter the Alarm Mode, the data you were viewing when you last exited 

 

x

the mode appears fi rst.

E-32

Using the Alarm

You can set fi ve independent daily alarms. When a 
daily alarm is turned on, an alarm tone will sound 
for about 20 seconds each day when the time in the 
Timekeeping Mode reaches the preset alarm time. 
This is true even if the watch is not in the Timekeeping 
Mode. One of the alarms is a snooze alarm, while the 
other four are one-time alarms. The snooze alarm 
operation repeats every fi ve minutes.
You can also turn on an Hourly Time Signal, which will 
cause the watch to beep twice every hour on the hour.

Alarm number

Alarm time (Hour : Minutes)

E-31

Note

 The Stopwatch Mode can indicate elapsed time up to 59 minutes, 59 seconds.

 

x

 Once started, stopwatch timing continues until you press 

 

x

D

 to stop it, even if 

you exit the Stopwatch Mode to another mode and even if timing reaches the 
stopwatch limit defi ned above.
 Exiting the Stopwatch Mode while a split time is frozen on the display clears the 

 

x

split time and returns to elapsed time measurement.

E-30

To perform an elapsed time operation

D

D

D

D

A

Start

Stop

(Restart)

(Stop)

Reset

To pause at a split time

D

A

A

D

A

Start

Split

(

SPL

 displayed)

Split release

Stop

Reset

To measure two fi nishes

D

A

D

A

A

Start

Split

(

SPL

 displayed)

First runner fi nishes.
Display time of fi rst 
runner.

Stop

Second runner 
fi nishes.

Split release

Display time of 
second runner.

Reset

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