Casio Watch 3251 User Manual download pdf (Page 2)

Operation Guide 3165/3251

To turn Active Display on and off

1. In the Timekeeping Mode, hold down A until the

seconds start to flash, which indicates the setting

screen.

2. Press C seven times to display the Active Display

on/off screen.

3. Press D to toggle Active Display on (on) and off (OF).

4. Press A to exit the setting screen.

• The Active Display on indicator (ACT ON) is on the

display while Active Display is turned on.

• Displaying the setting screen while Style 6 is displayed

and turning off Active Display will change the display

style to Style 2 automatically.

To select a timekeeping display style

1. In the Timekeeping Mode, hold down A until the seconds start to flash. This is the

setting screen.

2. Press C seven times to display the Active Display on/off screen.

3. Use D to turn off (OF) Active Display.

• You cannot select the timekeeping display style while Active Display is turned on.

4. Press A to exit the setting screen.

5. In the Timekeeping Mode, press A to cycle through the available timekeeping

display styles (Style 1 through Style 5), until the one you want is displayed.

• Displaying the setting screen while Style 6 is displayed and turning off Active Display

will change the display style to Style 2 automatically.

Countdown Timer

The countdown timer can be set within a range of one to

60 minutes. An alarm will sound when the countdown

reaches zero.

• The initial factory default setting is one minute (01min).

• The countdown operation continues even if you exit the

Countdown Timer Mode.

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

Countdown Timer Mode, which you enter by pressing

To set the countdown start time

In the Countdown Timer Mode, press A to increase the countdown start time

(minutes).

• You can set the countdown start time within the range of one minute (01min) to 60

minutes (60min), in one-minute increments.

• Holding down A will increase the countdown start time at high speed.

To perform a countdown timer operation

In the Countdown Timer Mode, press D to start the countdown.

• When the countdown reaches zero, the alarm tone will sound for 10 seconds or until

you stop it by pressing any button. The countdown time will reset automatically to its

starting value after the alarm stops.

• In addition to the alarm tone, a Flash Alert operation will be performed when the

countdown reaches zero. The Flash Alert operation will continue for 5 seconds or

until you stop it by pressing any button.

• 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 A. This will return the countdown time to its starting value.

• The remaining minutes and seconds are counted down on the display until the final

minute of the countdown. Only the seconds are displayed during the final minute.

Stopwatch

The stopwatch measures elapsed time.

• The display range of the stopwatch is 59 minutes, 59.99 seconds.

• Elapsed time operations are performed internally at units of 1/100-second. When

you stop an elapsed time operation, the 1/100-second value will appear on the

display.

Mode indicator

Seconds

1/100 second

Seconds Minutes

• Only the seconds are displayed during the first 59 seconds of an elapsed time

operation. After that, both the minutes and seconds are displayed.

• 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.

• All of the operations in this section are performed in the Stopwatch Mode, which you

enter by pressing C.

To measure elapsed time with the stopwatch

Elapsed Time

Start Stop Re-start Stop

Clear

Mode indicator

Minutes

Screen when stopwatch elapsed time operation

is stopped at 40 minutes, 01.45 seconds

Mode indicator

Alarm time

(Hour : Minutes)

Alarm

When the daily alarm is turned on, the alarm tone will

sound when the alarm time is reached.

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

Alarm Mode, which you enter by pressing C.

Alarm Operation

The alarm tone will sound at the preset time for

10 seconds, regardless of the mode the watch is in.

• Alarm operations are performed in accordance with the

Timekeeping Mode time.

• To stop the alarm tone after it starts to sound, press any

button.

• In addition to the alarm tone, a Flash Alert operation will

be performed whenever the alarm time is reached. The

Flash Alert operation will continue for 5 seconds or until

you stop it by pressing any button.

To set an alarm time

1. In the Alarm Mode, hold down A until the hour setting

of the alarm time starts to flash, which indicates the

setting screen.

• This will turn on the alarm automatically.

2. Press C to move the flashing between the hour and

minutes.

3. While a setting is flashing, use D (+) and B (–) to

change it.

4. Press A to exit the setting screen.

• With the 12-hour format, set the time correctly as a.m.

(no indicator) or p.m. (P indicator).

To turn an alarm on and off

In the Alarm Mode, press D to toggle it on ( displayed) and off ( not displayed).

• The alarm on indicator ( ) flashes while the alarm is sounding.

• The alarm on indicator (

) is displayed in all modes.

To test the alarm

In the Alarm Mode, hold down D to sound the alarm.

Dual Time

The Dual Time Mode lets you keep track of time in a

different time zone.

• In the Dual Time Mode, the seconds count is

synchronized with the seconds count of the

Timekeeping Mode.

To set the Dual Time

1. Press C to enter the Dual Time Mode.

2. In the Dual Time Mode, hold down A until the hour

setting starts to flash, which indicates the setting

screen.

3. Press C to move the flashing between the hour and

minutes.

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

change it.

5. Press A to exit the setting screen.

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 cycles automatically through the screens of

each mode.

To turn off Auto Display

Press any button except for B (which will illuminate the

display).

To turn on Auto Display

In the Timekeeping Mode, hold down B and D for about

two seconds.

• Note that Auto Display cannot be turned on while a

setting screen is on the display.

Flash Alert

While Flash Alert is turned on, a 5-second Flash Alert

operation (flashing LEDs) will be performed whenever an

alarm time is reached or when a countdown reaches zero.

This helps to alert you even in areas where surrounding

noise is too loud to hear the alarm tone.

• You can stop the Flash Alert operation and the alarm

tone by pressing any button.

• Note that Flash Alert is always enabled. You cannot turn

it off.

Button Operation Tone

The button operation tone will sound any time you press

one of the watch’s buttons. You can turn the button

operation tone on or off as desired.

• The daily alarm and countdown alarm tones continue to

sound even if you turn off the button operation tone.

To turn the button operation tone on and off

In any mode (except when a setting screen is on the

display), hold down C to toggle the button operation tone

on (

not displayed) and off ( displayed).

• Holding down C to turn the button operation tone on or off also causes the watch’s

current mode to change.

• The mute indicator is displayed in all modes when the button operation tone is

turned off.

Alarm on indicator

Mode indicator

PM indicator

Dual time

(Hour : Minutes)

Mute indicator

LEDs

(Display illumination)

Active Display on indicator

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Casio Watch 3251 User Manual Page 2

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