Manual Casio G-Shock DW-5900TH-1ER Watch

Manual

Operation Guide 3465

E-19

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.

x The countdown operation continues even if you exit the

Countdown Timer Mode.

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

Countdown Timer Mode, which you enter by pressing

C (page E-7).

To use the countdown timer

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

x When the end of the countdown is reached, the alarm sounds for 10 seconds or

until you stop it by pressing any button. The countdown time is automatically reset

to its starting value after the alarm stops.

Minutes

Hours Seconds

E-18

To measure times with the stopwatch

Elapsed Time

D

D D D A

Start Stop Resume Stop Reset

Split Time

D

A A D A

Start Split

(SPL displayed)

Split release Stop Reset

Two Finishes

D

A D A A

Start Split

First runner

finishes.

Display time of

first runner.

Stop

Second runner

finishes.

Split release

Display time of

second runner.

Reset

E-17

Stopwatch

The stopwatch lets you measure elapsed time, split

times, and two finishes.

x The display range of the stopwatch is 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-7).

Seconds

Minutes

1/100 seconds

E-16

Note

x The seconds count of the World Time is synchronized with the seconds count of

the Timekeeping Mode.

x All World Time Mode times are calculated from the current Home City time in the

Timekeeping Mode using UTC time differential values.

x The UTC differential is a value that indicates the time difference between a

reference point in Greenwich, England and the time zone where a city is located.

x The letters “UTC” is the abbreviation for “Coordinated Universal Time”, which is the

world-wide scientific standard of timekeeping. It is based upon carefully maintained

atomic (cesium) clocks that keep time accurately to within microseconds. Leap

seconds are added or subtracted as necessary to keep UTC in sync with the

Earth’s rotation.

E-15

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

1. In the World Time Mode, use D 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 between

Daylight Saving Time (DST indicator displayed) and

Standard Time (DST indicator 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.

x In the World Time Mode, you can switch the city code you currently have selected

as your Timekeeping Mode Home City between Standard Time and DST. The

setting you select in the World Time Mode will also be applied in the Timekeeping

Mode.

DST indicator

E-14

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-6).

To view the time in another city code

In the World Time Mode, press D to scroll through the

available city codes. Holding down the button scrolls at

high speed.

x For full information about city codes, see the “City Code

Table” at the back of this manual.

x If the current time shown for a city is wrong, check your

Timekeeping Mode time and Home City code settings

and make the necessary changes.

City code

Current time in the zone of

the selected city code

E-13

Daylight Saving Time (DST)

Daylight Saving Time (summer time) advances the time setting by one hour from

Standard Time. Remember that not all countries or even local areas use Daylight

Saving Time.

To toggle the Timekeeping Mode time between DST and Standard Time

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

seconds start to flash, which indicates the setting

screen.

2. Press C twice to display the DST setting screen.

3. Press D to toggle between Daylight Saving Time (On)

and Standard Time (OF).

4. Press A to exit the setting screen.

x The DST indicator is displayed on the Timekeeping

Mode and Alarm Mode screen while Daylight Saving

Time is turned on.

DST indicator

On/Off status

E-12

4. Press A to exit the setting screen.

x Resetting the seconds to 00 while the current count is in the range of 30 to 59

causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are

reset to 00 without changing the minutes.

x 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.

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

any indicator.

x The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is

applied in all modes.

x The year can be set in the range of 2000 to 2099.

x The watch’s built-in full automatic calendar makes allowances for different month

lengths and leap years. Once you set the date, there should be no reason to

change it except after you have the watch’s battery replaced.

x The day of the week is automatically displayed in accordance with the date (year,

month, and day) settings.

E-11

3. When the setting you want to change is flashing, use D and B to change it as

described below.

Screen To do this: Do this:

Reset the seconds to 00

Press D.

Change the city code

Use D (east) and B (west).

Toggle between Daylight Saving Time (On)

and Standard Time (OF)

Press D.

Change the hour or minutes

Use D (+) and B (–).

Toggle between 12-hour (12H) and 24-hour

(24H) timekeeping

Press D.

Change the year, month, or day

Use D (+) and B (–).

x See “Daylight Saving Time (DST)” (page E-13) for details about the DST setting.

E-10

To set the time and date

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

seconds start to flash, which indicates the setting

screen.

2. Press C to move the flashing in the sequence shown

below to select other settings.

Seconds

MinutesHourDSTCity Code

Day 12/24-Hour FormatYearMonth

CCC

CCC

C C

C

Rating

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