Casio 2839 Operation Manual Download Page 8

Operation Guide 2839

8

Stopwatch Mode

The stopwatch measures elapsed time in units of 1/100 second up to 23 hours 59 minutes, 59.99 seconds (24 hours). When the maximum
limit is reached, the elapsed time automatically returns to zero and timing continues from there.

Performing Stopwatch Operations

Mode Indicator

About two 
seconds

Timekeeping Mode

Hours

Minutes

Seconds

1/100 second

(Four times)

B

B

B

B

B

 Button

Split/Reset

Press during elapsed time
measurement to display the
split time.

Press when elapsed time
measurement is stopped to
reset the stopwatch to all
zeros.

D

D

D

D

D

 Button

Start/Stop

Each press starts and
stops elapsed time
measurement.

Elapsed Time Measurement

Start

Stop

Reset

Pressing the 

B

 button while timing is stopped resets the

stopwatch to all zeros.

Cumulative Time Measurement
Pressing the 

D

 button to restart the stopwatch without resetting it

to all zeros causes the elapsed time measurement to resume from
where it was last stopped.

Split Time Measurement

Record split

Release split

Reset

Stop

Start

Pressing 

B

 while timing is being performed freezes the current

elapsed time on the display, but timing of the next split continues
internally.

Changing to another mode while a split time is displayed cancels
the split time operation.

1st and 2nd Place Finishers

Start

1st finish

(Displays time 
of 1st finish.)

2nd finish

Displays time 
of 2nd finish.

Reset

Configuring Time and Date Settings Manually

Normally, you should never need to configure time and date settings manually if you have auto receive turned on and you are within the
range of a time calibration signal. If the watch is unable to update its settings automatically for some reason, however, you can configure
them manually as described below.

Time and Date Settings

Home City Code

Transmitter Selection 

Mode

Timekeeping Mode

 (Hold down about two seconds.) 

Summer Time

Auto Receive

Day

Month

Year

Seconds

Hour

Minute

12/24-hour 

Timekeeping

Power Saving

While the setting screen (the one with a flashing setting) is on the
display, use the 

C

 and 

A

 buttons to move the flashing between

settings.

A

A

A

A

A

 Button

Displays the setting screen.

Changes from the first
setting group to the next.

Exits the setting screen.

C

C

C

C

C

 Button

Moves the flashing
between settings.

See “Signal Reception Settings” for information about
calibration signal, Home City, summer time, and auto receive
settings.

To configure time and date settings
manually

1.

In the Timekeeping Mode
hold down the 

A

A

A

A

A

 button

for about two seconds.

This will cause the watch to
beep and display the
transmitter selection mode
setting screen.

A

A

A

A

A

 Button

Displays the setting screen.

Changes from the first
setting group to the next.

Exits the setting screen.

B

B

B

B

B

 Button

Scrolls back through the
options at the flashing
(selected) setting.

C

C

C

C

C

 Button

Moves the flashing
between settings.

D

D

D

D

D

 Button

Scrolls forward through the
options at the flashing
(selected) setting.

2.

Press the 

A

A

A

A

A

 button to

advance to the next group
of settings.

This causes the 12/24-hour
timekeeping setting to flash.
Example: 12H (12-hour
timekeeping)

3.

Use the 

C

C

C

C

C

 and 

A

A

A

A

A

 buttons

so the setting you want to
change is flashing on the
display.

Use the 

C

 button to cycle

through the settings shown
below. Each press of the 

C

button causes the next setting
to flash.

12/24-hour 

timekeeping

Power Saving 

Day

Month

Year

Seconds

Hour

Minute

4.

While the 12/24-hour
timekeeping setting is
flashing, press the 

D

D

D

D

D

button to select the
setting you want.

Pressing the 

D

 button toggles

the timekeeping format between
12-hour (“12H” indicator) and
24-hour (“24H” indicator).

5.

To restart the seconds
count to 00, press the 

D

D

D

D

D

button.

Pressing the 

D

 button while

the seconds count is in the
range of 30 to 59 resets it to
00 and also adds 1 to the
minutes. Pressing the 

D

button in the range of 00 to 29
resets the seconds count
without changing the minutes.

6.

While the hour, minutes,
year, month, or day setting
is flashing, use the 

D

D

D

D

D

 (+)

and 

B

B

B

B

B

 (–) buttons to

change the setting.

Holding down either button
changes the setting at high
speed.

When setting the hour, make sure you specify AM (A) or PM
(P) correctly, or that you specify the correct 24-hour time.

You can set a date in the range of January 1, 2000 to
December 31, 2099.

The day of the week is set automatically in accordance with
the date you set.

7.

While the Power Saving
setting is flashing, press
the 

D

D

D

D

D

 button to toggle it

on (PS On) or off (PS OF).

Use the 

C

 button to select each of the settings and the 

D

and 

B

 buttons to change them.

8.

When the settings are the
way you want, press the

A

A

A

A

A

 button.

This exits the setting screen.

The display also will exit the setting screen automatically if
you do not perform any operation for about two or three
minutes.

The watch automatically makes adjustments for leap years
and month lengths.

 (Forward)

(Back)

FREQUENCY (Frequency)

Timekeeping Mode

Summary of Contents for 2839

Page 1: ...ate the display It can take up to two seconds before display figures re appear after you place the watch in a well lit area To turn Power Saving on and off Use the procedure under Configuring Time and Date Settings Manually to turn Power Saving on or off The watch automatically enters the sleep state if left in a desk drawer or some other dark place for a long time while Power Saving is turned on ...

Page 2: ...ging times are for reference only Actual charging time depends on a variety of environmental factors Required Daily Charging Time The following is the daily amount of charging required each day to support the operations under Daily Use Exposure Level Brightness Outdoor Sunlight 50 000 lux 5 minutes 24 minutes 48 minutes 8 hours Approximate Exposure Time Sunlight Through a Window 10 000 lux Dayligh...

Page 3: ...ning etc Reception Range This watch is designed to receive the standard time calibration signal of Japan JJY or of the United States WWVB The signal that is received depends on the current Home City setting For information about city codes see the Selecting Your Home City Home City TYO LAX DEN CHI NYC Transmitter Either the Mt Otakadoya signal 40kHz or the Mt Hagane signal 60kHz Fort Collins Color...

Page 4: ...d setting C C C C C Button Moves the flashing between settings D D D D D Button Scrolls forward through the options at the flashing selected setting 2 Press the C C C C C button once to select the Home City setting The currently selected city code will be flashing on the screen 3 Use the D D D D D and B B B B B buttons to scroll through the city codes until the one you want to select is displayed ...

Page 5: ...in range of the transmitter Proper reception may be impossible if there is something blocking the signal If reception is unsuccessful try again This watch is designed to adjust its current time setting in accordance with the calibration signal transmitted in Japan and the United States only Note that you will need to make your own adjustments when using this watch outside of Japan or the United St...

Page 6: ...button This will display the date and time that the time calibration signal was last received successfully To return to the Timekeeping Mode press the D button again When you enter the World Time Mode the screen for the city that was displayed when you last exited the mode appears first Time in World Time City City Code Time in Home City Once Timekeeping Mode After you set the current time for the...

Page 7: ...to beep twice every hour on the hour When you enter the Alarm Mode the screen for the alarm that was displayed when you last exited the mode appears first Alarm Time Alarm Number Current Time Three Times Timekeeping Mode To select an alarm or the Hourly Time Signal screen Each press of the D button cycles through available screens in the sequence shown below Alarm 1 Alarm 2 Alarm 3 Alarm 4 Hourly ...

Page 8: ...nd auto receive settings To configure time and date settings manually 1 In the Timekeeping Mode hold down the A A A A A button for about two seconds This will cause the watch to beep and display the transmitter selection mode setting screen A A A A A Button Displays the setting screen Changes from the first setting group to the next Exits the setting screen B B B B B Button Scrolls back through th...

Page 9: ...me Stamp records The record that was on the display the last time you exited the Recall Mode appears first Mode Indicator About two seconds Recall Mode Twice Timekeeping Mode To search for Time Stamp data In the Recall Mode use the D D D D D and B B B B B buttons to scroll through Time Stamp records Holding down either button scrolls at high speed B B B B B Button Scrolls in the direction of newer...

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