Casio 3420 Operation Manual Download Page 2

Operation Guide 3420

E-19

 To confi gure the countdown timer

1.  While the countdown start time is on the display in the 

Countdown Timer Mode, hold down 

A

 until the current 

countdown start time starts to fl ash, which indicates the 
setting screen.

 

x

 If the countdown start time is not displayed, use the 
procedure under “To use the countdown timer” (page 
E-21) to display it.

2.  Press 

C

 to move the fl ashing in the sequence shown 

below to select other settings.

Hours

Progress Beeper

Auto-repeat

C

C

Minutes

C

C

E-18

Countdown End Beeper

The countdown end beeper lets you know when the countdown reaches zero.

 

x

 When the progress beeper is turned off, the countdown end beeper sounds for 
about 10 seconds, or until you press any button to stop it.

 

x

 When the progress beeper is turned on, the countdown end beeper sounds for 
about one second.

Progress Beeper

When the progress beeper is turned on, the watch uses beeps to signal countdown 
progress as described below.

 

x

 Starting from fi ve minutes before the end of the countdown, the watch emits four 
short beeps at the top of each countdown minute.

 

x

 30 seconds before the end of the countdown, the watch emits four short beeps.

 

x

 The watch emits a short beep for each of the last 10 seconds of the countdown. 

 

x

 If the countdown start time is six minutes or greater, the watch emits a short beep 
for each second of the fi nal 10 seconds before the fi ve-minute point is reached. Four 
short beeps are emitted to signal when the fi ve-minute point is reached.

E-17

Auto-repeat

When auto-repeat is turned on, the countdown restarts automatically from the 
countdown start time when it reaches zero. If left running, the countdown is repeated 
a total of eight times, after which it stops automatically.
When auto-repeat is turned off, the countdown stops when it reaches zero and the 
display shows the original countdown start time.

 

x

 Pressing 

D

 while an auto-repeat countdown is in progress pauses the current 

countdown. You can resume the auto-repeat countdown by pressing 

D

, or you can 

press 

B

 to reset to the countdown time starting value. 

Countdown Timer Beeper Operations

The watch beeps at various times during a countdown so you can keep informed 
about the countdown status without looking at the display. The following describes the 
types of beeper operations the watch performs during a countdown.

E-16

Countdown Timer

The countdown timer can be set within a range of one 
minute to 24 hours. An alarm sounds when the countdown 
reaches zero. The countdown timer also has an auto-
repeat feature and a progress beeper that signals the 
progress of the countdown.

All of the operations in this section are performed in the 
Countdown Timer Mode, which you enter by pressing 

C

 (page E-5).

Confi guring the Countdown Timer

The following are the settings you should confi gure before 
actually using the countdown timer.

Countdown start time; Auto-repeat on/off; Progress beeper 
on/off

See “To confi gure the countdown timer” (page E-19) for 
information about setting up the timer.

Seconds

Hours

Minutes

E-15

About Auto-Start

With Auto-Start, the watch performs a 5-second countdown, and stopwatch operation 
starts automatically when the countdown reaches zero.
During the fi nal three seconds of the countdown, a beeper sounds with each second.

To use Auto-Start

1.  While the stopwatch screen is showing all zeros in the 

Stopwatch Mode, press 

B

.

 

x

 This displays a 5-second countdown screen.

 

x

 To return to the all zeros screen, press 

B

 again.

2.  Press 

D

 to start the countdown.

 

x

 When the countdown reaches zero, a tone sounds and a 
stopwatch timing operation starts automatically.

 

x

 Pressing 

D

 while the Auto-Start countdown is in 

progress immediately starts the stopwatch.

E-14

To measure times with the stopwatch

Elapsed Time

D

D

D

D

B

Start

Stop

Re-start

Stop

Clear

Split Time

D

B

B

D

B

Start

Split

(

 displayed)

Split release

Stop

Clear

Two Finishes

D

B

D

B

B

Start

Split

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

Stop

Second runner 
fi nishes.

Split release

Display time of 
second runner.

Clear

The time on the screen may not appear to stop immediately when you press a 
button to stop timing or to perform a split operation. Despite this, the time recorded 
by your button operation is accurate.

E-13

Stopwatch

The stopwatch lets you measure elapsed time, split times, 
and two fi nishes. It also includes Auto-Start.

 

x

 The display range of the stopwatch is 23 hours, 
59 minutes, 59.99 seconds.

 

x

 The stopwatch continues to run, restarting from zero after 
it reaches its limit, until you stop it.

 

x

 The stopwatch measurement operation continues even if 
you exit the Stopwatch Mode.

 

x

 Exiting the Stopwatch Mode while a split time is frozen 
on the display clears the split time and returns to elapsed 
time measurement.

 

x

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

C

 

(page E-5).

Seconds

1/100 second

Minutes

Hours

E-12

To toggle a city code time between Standard Time and Daylight Saving Time

1.  In the World Time Mode, use 

D

 (east) and 

B

 (west) to 

display the city code (time zone) whose Standard Time/
Daylight Saving Time setting you want to change.

2.  Hold down 

A

 for about one second to toggle Daylight 

Saving Time (

DST

 displayed) and Standard Time 

(

DST

 not displayed).

 

x

 The 

DST

 indicator is on the display whenever you display 

a city code for which Daylight Saving Time is turned on.

 

x

 Note that the DST/Standard Time setting affects only 
the currently displayed city code. Other city codes are 
not affected.

DST indicator

E-11

World Time

World Time shows the current time in 48 cities (29 time 
zones) around the world.

 

x

 All of the operations in this section are performed in 
the World Time Mode, which you enter by pressing 

C

 

(page E-4).

To view the time for another city code

In the World Time Mode, press 

D

 to scroll eastwardly 

through city codes.
In the World Time Mode, press 

B

 to scroll westwardly 

through city codes.

 

x

 For full information about city codes, see the “City Code 
Table” at the back of this manual.

 

x

 If the current time for a city is wrong, check your 
Timekeeping Mode time and time zone settings and 
make necessary changes.

Current time and date 
in the zone of the 
selected city code

City code

E-10

To toggle between 12-hour and 24-hour timekeeping

In the Timekeeping Mode, press 

D

 to toggle between 12-hour timekeeping and 

24-hour timekeeping.

With the 12-hour format, the 

P

 (PM) indicator appears to the left of the hour digits for 

times in the range of noon to 11:59 p.m. and no indicator appears to the left of the 
hour digits for times in the range of midnight to 11:59 a.m.

With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without 
any indicator.

The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is 
applied in all other modes.

The 

P

 indicator is not displayed when the current time is displayed in other modes.

Summary of Contents for 3420

Page 1: ...isplayed in the Timekeeping Mode and World Time Mode are linked Because of this make sure you select a Home Time zone before you set the time and date Seconds Hour Minutes PM indicator Day of week Month Day E 5 C Stopwatch Mode Countdown Timer Mode Alarm Mode C C E 4 General Guide x Press C to change from mode to mode x In any mode except when a setting screen is on the display press L to illumina...

Page 2: ...l zeros in the Stopwatch Mode press B x This displays a 5 second countdown screen x To return to the all zeros screen press B again 2 Press D to start the countdown x When the countdown reaches zero a tone sounds and a stopwatch timing operation starts automatically x Pressing D while the Auto Start countdown is in progress immediately starts the stopwatch E 14 To measure times with the stopwatch ...

Page 3: ...et an alarm time 1 In the Alarm Mode use D or B to scroll through the alarm screens until the one whose time you want to set is displayed x To set a one time alarm display an alarm screen or To set the snooze alarm display the screen x 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 which indicates the set...

Page 4: ...rent time flashes on the display This is the setting screen 2 Press C eight times to display the Flash Alert setting screen 3 Press D to toggle Flash Alert on displayed and off displayed 4 Press A to exit the setting screen x The Flash Alert setting you select with the above procedure is applied in all modes x When Flash Alert is on appears on the timekeeping screen for about one second whenever y...

Page 5: ...finishes Illumination LED light emitting diode Selectable illumination duration Auto Light Switch Other Button operation tone on off Flash alert Battery One lithium battery Type CR2032 Approximately 10 years on type CR2032 10 seconds of alarm operation per day one countdown timer operation with progress beeper per week one stopwatch operation with auto start per week 1 5 seconds of illumination pe...

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