Casio 5088 Operation Manual Download Page 3

3

Operation Guide 5088

To select a mode

Press 

C

 to cycle between the modes as shown below. The 

n

 

Right Dial Hand

 

indicates the currently selected mode.

6

Timekeeping Mode

Stopwatch Mode

Alarm Mode

World Time Mode

The hand indicates 
the day of the week 
(

SU

MO

TU

WE

TH

FR

SA

).

The hand points to 

0

.

The hand points to 

AL

.

The hand points to 

STD

 or 

DST

.

C

Timekeeping

Use the Timekeeping Mode to view the current time and date. To enter the 
Timekeeping Mode from any other mode, hold down 

C

 for about two seconds.

Hand Functions

 Hour Hand

 Second Hand

 Minute Hand

 Upper Left Dial Hand: 

 Indicates the current hour in 
the Home City time in 24-hour 
format.

 Lower Left Dial Hands: 

 Indicate the current time in the World Time City in 
24-hour format.

 Right Dial Hand: 

 Indicates the day of the week.

 Day

Confi guring Home City Settings

There are two Home City settings: actually selecting the Home City and selecting 
either standard time or daylight saving time (DST).

To confi gure Home City settings

Note

 This watch does not have a city code that corresponds 

 

to Newfoundland.

 In the Timekeeping Mode, keep 

1. 

A

 depressed (for about 

fi ve seconds) as the 

x

 

Second Hand

 goes through the 

following sequence.

 Moves to 

 

YES

 (or 

Y

 for some models) or 

NO

 (

N

to indicate the last signal reception result, then to 

READY

 (

R

), and then to the city code of the currently 

selected Home City.
 This indicates the city code setting mode.

 

 The watch will exit the setting mode automatically if 

 

you do not perform any operation for about two or 
three minutes.
 For details about city codes, see the “City Code 

 

Table”.

 To change the Home City setting, press 

2. 

D

 to move the 

x

 

Second Hand

 clockwise.

 Keep pressing 

 

D

 until the 

x

 

Second Hand

 is pointing 

at the city code you want to select as your Home City.
 Each time you select a city code, the 

 

z

 

Hour Hand

c

 

Minute Hand

v

 

Upper Left Dial Hand

 and 

m

 

Day

 

move to the current time and date for that city code. 
Do not perform the next operation until these hands 
stop moving.

 Press 

3. 

B

 to toggle the time for the currently selected city code between 

STD

 

(standard time)/

DST

 (daylight saving time).

 In the city code setting mode, the 

 

n

 

Right Dial Hand

 indicates the current 

daylight saving time setting as 

STD

 (standard time) or 

DST

 (daylight saving 

time).
 Note that you cannot switch between 

 

STD

 (standard time)/

DST

 (daylight saving 

time) while 

UTC

 is selected as your Home City.

 After all the settings are the way you want, press 

4. 

A

 to return to the Timekeeping 

Mode.

To toggle the Home City time between standard time and daylight saving time

 Perform the step 1 under “To confi gure Home City settings”.

1. 

 Each time you select a city code, the 

 

z

 

Hour Hand

c

 

Minute Hand

, and 

v

 

Upper Left Dial Hand

 move to the current time for that city code. Do not 

perform the next operation until these hands stop moving.

 Press 

2. 

B

 to toggle the time for the city code of the currently selected Home City 

between 

STD

 (standard time)/

DST

 (daylight saving time).

 In the city code setting mode, the 

 

v

 

Right Dial Hand

 indicates the current 

daylight saving time setting as 

STD

 (standard time) or 

DST

 (daylight saving 

time).
 Note that you cannot switch between 

 

STD

 (standard time)/

DST

 (daylight saving 

time) while 

UTC

 is selected as your Home City.

 After the setting is the way you want, press 

3. 

A

 to return to the Timekeeping Mode.

Note

 After you specify a city code, the watch will use UTC* offsets in the World Time 

 

Mode to calculate the current time for other time zones based on the current time 
in your Home City.
 Selecting some city codes makes it possible for the watch to receive the time 

 

calibration signal for the corresponding area automatically.

 Coordinated Universal Time, the world-wide scientifi c standard of timekeeping. The 

 

*

reference point for UTC is Greenwich, England.

B

+

@

*

6

>

5

@

B

+

@

6

>

5

Confi guring Current Time and Date Settings Manually

You can confi gure current time and date settings manually when the watch is unable 
to receive a time calibration signal.

To change the current time setting manually

 In the Timekeeping Mode, keep 

1. 

A

 depressed (for about 

fi ve seconds) as the 

x

 

Second Hand

 goes through the 

following sequence.

 Moves to 

 

YES

 (or 

Y

 for some models) or 

NO

 (

N

to indicate the last signal reception result, then to 

READY

 (

R

), and then to the city code of the currently 

selected Home City.
 At this time, the 

 

n

 

Right Dial Hand

 will indicate the 

Home City’s current daylight saving time setting (

STD

 

or 

DST

).

 Change the Home City and daylight saving time (DST) 

2. 

settings, if you want.

 For details about these settings, see steps 2 and 3 

 

under “To confi gure Home City settings”.
 In the following steps, each press of 

 

C

 cycles 

between settings as shown below.

Home city/DST

Hour/Minute

Year

(tens)

Day

Month

Year

(ones)

 Press 

3. 

C

.

 The watch will beep, and the 

 

x

 

Second Hand

 and 

n

 

Right Dial Hand

 will move 

to their 12 o’clock positions. This is the time setting mode.

 Use 

4. 

D

 (+) and 

B

 (–) to change the time (hour and minute) setting.

 Each press of either button will move the hands (

 

z

 

Hour Hand

 and 

c

 

Minute 

Hand

) one minute.

 Holding down 

 

D

 or 

B

 will start high-speed 

z

 

Hour Hand

 and 

c

 

Minute Hand

 

movement in the applicable direction. To stop high-speed hand movement, 
press any button.
The 

 

v

 

Upper Left Dial Hand

 and 

z

 

Hour Hand

 move in sync with each other.

 When setting the time, make sure that the 

 

v

 

Upper Left Dial Hand

 indicates the 

proper a.m./p.m. hour.
 If you want to change the date setting at this time, press 

 

C

 and perform the 

procedure starting from step 3 under “To change the current date setting 
manually”.

 After the time setting is the way you want, press 

5. 

A

 to return to the Timekeeping 

Mode.

 This will cause the 

 

x

 

Second Hand

 to move automatically to 12 o’clock and 

resume movement from there.

To change the current date setting manually

@

00

50

10

40

30

90

60

80

70

Setting the year (tens digit)

20

 In the Timekeeping Mode, keep 

1. 

A

 depressed (for 

about fi ve seconds) as the 

x

 

Second Hand

 goes 

through the following sequence.

 Moves to 

 

YES

 (or 

Y

 for some models) or 

NO

 (

N

to indicate the last signal reception result, then 
to 

READY

 (

R

), and then to the city code of the 

currently selected Home City.

 Press 

2. 

C

 twice.

 The watch will beep and change to the year 

 

setting mode.
 The year can be set in the range of 2000 to 

 

2099.

 Use 

3. 

D

 to change the tens digit of the year setting.

 Each press of 

 

D

 will move the 

x

 

Second Hand

 

and change the tens digit of the year setting.

 After the tens digit of the year setting is the way 

4. 

you want, press 

C

.

 The watch will beep and change to the ones 

 

digit of the year setting mode.

 Use 

5. 

D

 to move the 

x

 

Second Hand

 to the ones 

digit of the year setting you want.

 Each press of 

 

D

 will move the 

x

 

Second Hand

 

and change the ones digit of the year setting.

 After the year setting is the way you want, press 

6. 

C

.

 The watch will beep and change to the month 

 

setting mode.

 Use 

7. 

D

 to move the 

x

 

Second Hand

 to the 

month setting you want.

 After the month setting is the way you want, 

8. 

press 

C

.

 The watch will beep and change to the day 

 

setting mode.

@

6

6

>

B

+

@

Setting the year (ones digit)

@

0

1

2

3

4

6

5

7

9

8

Setting the month

@

Dec

Jan

Feb

Mar

Apr

Jun

May

Nov

Jul

Oct

Sep

Aug

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