Casio 3488 Operation Manual Download Page 2

Operation Guide 3488

E-19

To turn the daily alarm and hourly time signal on and off

Press 

B

 while in the Alarm Mode to change the status of the daily alarm and hourly 

time signal in the following sequence.

B

B

B

Both OFF

Daily Alarm 

Only

Hourly Time 

Signal Only

Both ON

B

 

x

 The alarm on indicator (

) and the Hourly Time Signal on indicator (

) are shown 

on the display in all modes while these functions are turned on.

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3.  Press 

D

 to increase the selected digits and 

B

 to decrease them. Holding down 

either button changes the selection at high speed.

 

x

 The format (12-hour and 24-hour) of the alarm time matches the format you 
select for regular timekeeping.

 

x

 When setting the alarm time using the 12-hour format, take care to set the time 
correctly as morning (no indicator) or afternoon (

P

).

4.  After you set the alarm time, press 

A

 to return to the Alarm Mode.

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Alarm Mode

When the Daily Alarm is switched on, the alarm 
sounds for 20 seconds at the preset time each day. 
Press any button to stop the alarm after it starts 
to sound. When the Hourly Time Signal is on, the 
watch beeps every hour on the hour.

To set the alarm time

1.  Hold down 

A

 until the hour digits start to flash 

on the display. The hour digits flash because they 
are 

selected

.

This operation will switch the Daily Alarm on 
automatically.

2.  Press 

C

 to change the selection in the following 

sequence.

Hour

Minutes

C

Minutes

Hour

Hourly time signal on indicator

Current time

Alarm on indicator

Mode indicator

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4.  Press 

A

 to move the flashing to the target time ON/OFF setting.

5. 

 

Press 

D

 or 

B

 to toggle the target time on and off.

6.  Press 

A

 to return to the Stopwatch Mode.

Important!

The alarm will not sound if you do not turn on the target time.

 

x

 Press 

A

C

 or 

L

 to stop the alarm after it starts to sound.

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To set the Target Time and to turn it on and off

1.  While the display is showing all zeros in the 

Stopwatch Mode, hold down 

A

, and the hour 

digit of the target time starts to flash because it 
is 

selected

.

2.  Press 

C

 to change the selection in the following 

sequence.

C

C

Hour

Minutes

Seconds

C

3.  Press 

D

 to increase the selected number or 

B

 to 

decrease it. Holding down either button changes 
the selection at high speed.

 

x

 Press 

D

 and 

B

 at the same time to clear the 

setting to 0:00' 00".

Minutes 

Hour

Mode indicator

Target time on indicator

Seconds

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About the Auto-Start function

With the Auto-Start function, the watch performs a 5-second countdown. When the 
countdown reaches zero, stopwatch operation starts automatically. During the final 
three seconds of the countdown, a beeper sounds with each second.

To turn the Auto-Start function on and off

While the display is showing all zeros in the Stopwatch Mode, press 

B

 to toggle it 

on and off.

 

x

 The indicator 

A.START

 appears and 

05

 is shown in the upper display while Auto-

Start is turned on. The 

A.START

 indicator is not shown and the upper part of the 

display shows the current time when Auto-Start is turned off.

About the Target Time function

With the Target Time function, an alarm sounds for ten seconds whenever the time 
being kept by the stopwatch reaches a target time you have preset.

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(a) Elapsed time measurement

D

D

D

D

B

Start

Stop

Resume

Stop

Reset

(b) Split time measurement

D

B

B

D

B

Start

Split

Split release

Stop

Reset

(c) Split time and two finishes

D

B

D

B

B

Start

Split

First runner 
finishes.

Stop

Second runner 
finishes.
Record time of 
first runner.

Split release

Record time of 
second runner.

Reset

E-12

Stopwatch Mode

The Stopwatch Mode lets you measure elapsed 
time, split times, and two finishes. The range of the 
stopwatch is 23 hour, 59 minutes, 59.99 seconds. 
You can also have an alarm sound when a target 
time is reached. The Stopwatch Mode also features 
an Auto-Start function.

1/100 Seconds

Current time

Target time 
on indicator

Minutes

Seconds

Mode indicator

E-11

To switch auto repeat timing and the progress beeper on and off

1.  Hold down 

A

 while in the Countdown Timer Mode. The hour digits flash on the 

display because they are 

selected

. Press 

A

 again to move the flashing to the auto 

repeat ON/OFF setting.

2.  Press 

D

 or 

B

 to toggle auto repeat on (

) and off.

3.  Press 

C

 to move the flashing to the progress beeper ON/OFF setting.

4.  Press 

D

 or 

B

 to toggle the progress beeper on ( ) and off.

5.  Press 

A

 to return to the Countdown Timer Mode.

 

x

 When the end of the countdown is reached while auto repeat is on, the alarm 
sounds, but the countdown restarts from the beginning without stopping. You 
can stop the countdown by pressing 

D

 and manually reset to the start time by 

pressing 

B

.

 

x

 If you set a starting time of 10 seconds or less and have Auto Repeat turned on, 
the countdown timer tone (which normally sounds for 10 seconds) sounds for only 
one second.

 

x

 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.

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3.  Press 

D

 to increase the selected number or 

B

 to decrease it. Holding down 

either button changes the selection at high speed.

 

x

 Press 

D

 and 

B

 at the same time to clear the starting time to 0:00' 00".

 

x

 To set the starting value of the countdown time to 24 hours, set 0:00' 00".

4.  After you set the countdown start time, press 

A

 twice to return to the Countdown 

Timer Mode.

To use the countdown timer

1.  Press 

D

 while in the Countdown Timer Mode to start the countdown timer.

2.  Press 

D

 again to stop the countdown timer.

 

x

 You can resume countdown timer operation by pressing 

D

.

3.  Stop the countdown timer and then press 

B

 to reset the countdown time to its 

starting value.

 

x

 When the end of the countdown is reached and auto repeat timing is off, the 
alarm sounds for 10 seconds or until you stop the alarm by pressing any button. 
Countdown timing stops and the countdown time is automatically reset to its 
starting value after the alarm stops.

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