Casio GR-8900-1ER Instruction manual

MO1106-EA

Operation Guide 3269

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to read this manual carefully.

Keep the watch exposed to bright light

Bright Light

Solar cell

The electricity generated by the solar cell of the watch is stored by a rechargeable battery. Leaving or using the

watch where it is not exposed to light causes the battery to run down. Make sure the watch is exposed to light as much as possible.

• When you are not wearing the watch on your wrist, position the face so it is pointed at a source of bright light.

• You should try to keep the watch outside of your sleeve as much as possible. Charging is reduced significantly if the face is covered only partially.

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• The watch continues to operate, even when it is not exposed to light. Leaving the watch in the dark can cause the battery to run down, which will result in some watch functions to be disabled. If the battery goes dead, you will have to re-configure watch settings after recharging. To ensure normal watch operation, be sure to keep it exposed to light as much as possible.

Battery charges in the light. Battery discharges in the dark.

Solar cell (Converts light to electrical power.)

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About This Manual

• Depending on the model of your watch, display text appears either as dark figures on a light background or light figures on a dark background. All sample displays in this manual are shown using dark figures on a light background.

• Button operations are indicated using the letters shown in the illustration.

• Each section of this manual provides you with the information you need to perform

operations in each mode. Further details and technical information can be found in the “Reference” section.

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Procedure Lookup

The following is a handy reference list of all the operational procedures contained in this manual.

Bright Light

LEVEL 1

LEVEL 2

LEVEL 3

Charge

LEVEL 4

Rechargeable battery

Electrical energy

All functions enabled

Dis-

charge

LEVEL 1

LEVEL 2

LEVEL 3

LEVEL 4

Some or all functions disabled

To set the time and date manually ...................................................................... E-11

To specify your Home City ...................................................................................E-14

To change the Daylight Saving Time (summer time) setting ............................ E-15

To view the time in another city........................................................................... E-18

To toggle a city code time between Standard Time and Daylight

Saving Time ...................................................................................................... E-18

To set an alarm time ............................................................................................. E-20

To test the alarm ................................................................................................... E-22

To turn an alarm on and off.................................................................................. E-23

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• The actual level at which some functions are disabled depends on the watch model.

• Frequent display illumination can run down the battery quickly and require charging.

The following guidelines give an idea of the charging time required to recover from a single illumination operation.

Approximately 5 minutes exposure to bright sunlight coming in through a window

Approximately 8 hours exposure to indoor fluorescent lighting

• Be sure to read “Power Supply” (page E-35) for important information you need to know when exposing the watch to bright light.

If the display of the watch is blank...

If the display of the watch is blank, it means that the watch’s Power Saving function has turned off the display to conserve power.

• See “Power Saving Function” (page E-45) for more information.

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Contents

General Guide ......................................................................................................... E-8

Timekeeping .......................................................................................................... E-10

World Time ............................................................................................................. E-17

Alarms .................................................................................................................... E-19

Stopwatch .............................................................................................................. E-25

Countdown Timer .................................................................................................. E-27

Illumination ............................................................................................................ E-30

Power Supply ........................................................................................................ E-35

Reference .............................................................................................................. E-43

Specifications ....................................................................................................... E-51

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To turn the Hourly Time Signal on and off ..........................................................E-24

To measure times with the stopwatch ................................................................ E-26

To configure the countdown timer ...................................................................... E-28

To use the countdown timer ................................................................................ E-29

To illuminate the display manually ...................................................................... E-30

To specify the illumination duration ................................................................... E-31

To turn the auto light switch on and off.............................................................. E-34

To turn the button operation tone on and off .....................................................E-44

To recover from the sleep state ........................................................................... E-46

To turn Power Saving on and off ......................................................................... E-47

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General Guide

• Press C to change from mode to mode.

• In any mode, press L to illuminate the display.

Timekeeping Mode

▲

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World Time Mode

▲

Countdown Timer Mode Stopwatch Mode

▲

Alarm Mode

▲

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Operation Guide 3269

Timekeeping

Press the B button to toggle the upper display between the day of the week and date, and the currently selected World Time city and time (Dual Time). Use the Timekeeping Mode to set and view the current time and date.

Current Time

Seconds

PM indicator

Hour : Minutes Seconds

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• For full information on city codes, see the “UTC Differential/City Code List” at the back of this manual.

3. Press C to move the flashing in the sequence shown below to select the other

setting.

City Code

4. When the timekeeping setting you want to change is flashing, use D or B to

change it as described below.

Screen:

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To specify your Home City

Hour : Minutes

PM indicator

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Day of week

▲

Month – Day

12/24-Hour

DST

Format

Illumination

Duration

To do this: Do this:

Specify your Home City

Cycle between Daylight Saving Time (ON) and Standard Time (

City code

Seconds

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

code starts to flash, which indicates the setting screen.

2. Press D (east) and B (west) to select the city code

you want to use as your Home City.

3. Press A to exit the setting screen.

Seconds

Operation

Tone

OFF

Dual Time

Hour

DayPower Saving

Month

Use D (east) and B (west).

Press D.

City code

Dual time

Minutes

Year

Read This Before You Set the Time and Date!

This watch is preset with a number of city codes, each of which represents the time zone where that city is located. When setting the time, it is important that you first select the correct city code for your Home City (the city where you normally use the watch). If your location is not included in the preset city codes, select the preset city code that is in the same time zone as your location.

• Note that all of the times for the World Time Mode city codes (page E-17) are displayed in accordance with the time and date settings you configure in the Timekeeping Mode.

To set the time and date manually

Screen: To do this: Do this:

5. Press A to exit the setting screen.

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 change the Daylight Saving Time (summer time) setting

DST indicator

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

code starts to flash, which indicates the setting screen.

2. Use D and B to select the city code you want.

• Make sure you select your Home City code before changing any other setting.

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

Reset the seconds to zero (

Change the hour and minutes

Change the year, month and day

Toggle between Button Operation Tone on( ) and off ( )

Toggle the display illumination duration between 1.5 seconds ( and three seconds ( )

Toggle between Power Saving on ( and off ( )

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

code starts to flash, which indicates the setting screen.

2. Press C and the DST setting screen appears.

3. Use D to cycle through the DST settings in the

sequence shown below.

DST off (

OFF

4. When the setting you want is selected, press A to exit

the setting screen.

• The DST indicator appears to indicate that Daylight Saving Time is turned on.

Press D.

)

Press D.

Use D (+) and B (–).

Press D.

)

Press D.

) DST on (ON)

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12-hour 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 the P (PM) indicator.

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

Others

• The day of the week is displayed automatically in accordance with the date (year, month and day) settings.

• Button operation tone on and off (page E-44)

• Illumination duration (page E-31)

• Power Saving on and off (page E-47)

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To view the time in another city

While in the World Time Mode, use the D (eastward) and B (westward) buttons to scroll through the city codes (time zones). Holding down either button scrolls at high speed.

• Pressing the D and B buttons at the same time will jump to the UTC time zone.

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

DST indicator

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1. In the World Time Mode, use D and B to display the

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

2. Hold down A to toggle between Daylight Saving Time

(DST indicator displayed) and Standard Time (DST indicator not displayed).

• The DST indicator is shown on the World Time Mode screen while Daylight Saving Time is turned on.

• You can turn on DST individually for each city code, except UTC.

• Turning on DST for the city code that is currently selected as your Home City will turn on DST for normal timekeeping.

World Time

City code

Current time in selected city

Alarms

Alarm number

Current Time

Alarm time (Hour : Minutes)

World Time shows the current time in 48 cities (31 time zones) around the world.

• The times kept in the World Time Mode are synchronized with the time being kept in the Timekeeping Mode. If you feel that there is an error in any World Time Mode time, check to make sure you have the correct city selected as your Home City. Also check to make sure that the current time as shown in the Timekeeping Mode is correct.

• Select a city code in the World Time Mode to display the current time in any particular time zone around the globe. See the “UTC Differential/City Code List” at the back of this manual for information about the UTC differential settings that are supported.

• All of the operations in this section are performed in the World Time Mode, which you enter by pressing C (page E-9).

You can set up to five independent daily alarms with hour and minutes. When an alarm is turned on, the alarm tone sounds when the alarm time is reached. One of the alarms is a snooze alarm, while the other four are daily alarms. You also can turn on an Hourly Time Signal that causes the watch to beep twice every hour on the hour.

• There are five alarm screens numbered

AL3 and AL4 for the daily alarm, and a snooze alarm

screen indicated by screen is indicated by

• All of the operations in this section are performed in the Alarm Mode, which you enter by pressing C (page E-9).

SNZ. The Hourly Time Signal

SIG.

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AL1, AL2,

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