Casio 2645 User Manual

MA0310-EA

Power Saving

Operation Guide 2514/2645

The Power Saving feature of the watch is turned on at the factory.

• Power Saving causes the watch to automatically enter a sleep state to save power whenever the watch is left in the dark.

• Note that the watch may also enter the sleep state if the watch is blocked from light by your sleeve.

❚

How the sleep state works

• Display sleep state

The display sleep state is triggered whenever the watch is left in the dark for three or four days.

• The display goes blank, except for a sleep indicator. Alarms, the hourly time signal, and auto signal reception continue to operate normally while the watch is in the display sleep state.

• Function sleep state

The function sleep state is triggered whenever the watch is left in the dark for four days.

• Alarms, the hourly time signal, and auto signal reception do not operate while the watch is in the function sleep state.

• Digital timekeeping functions continue to operate normally in the function sleep state.

Each press of the C button sounds a confirmation tone and cycles through available modes in the sequence shown below.

• The watch will automatically revert to the Timekeeping Mode if you leave it in the Alarm Mode or Data Memory Mode without performing any operation for about two or three minutes.

Sleep indicator

❚

To recover from the sleep state

Move the watch to a brightly lit location or press any button.

• It may take as long as five seconds to recover from the sleep state

❚

To turn Power Saving on and off

See the procedure under “To manually set the time and date” for information about turning off Power Saving.

Leaving the watch in a drawer or anywhere else it is dark can cause Power Saving to trigger in order to conserve battery power.

World Time ModeTimekeeping Mode

(Light)

Button

(RECOVER indicator)

Button

(Sleep indicator)

Button

(Mode Switching)

Battery Indicator

day

Month

PM indicator (no display for AM)

Hour

Minutes

Button

(Alarm Indicator)

Day of the Week

Receive Icon

Receive Indicator

Seconds

Days of the Week

SUN : Sunday MON : Monday TUE : Tuesday WED : Wednesday THU : Thursday FRI : Friday SAT : Saturday

GMT Differential

World Time

Stopwatch Mode

Time

City Code

Mode Name

• The actual appearance of your watch display depends on its model number.

Alarm Mode

Alarm Number

Message text appears when text is present.

Alarm Time

Data Memory Mode

Data

Record Number

Display IlluminationModes and Display Screens

Pressing the L button in any mode illuminates the display for about 1.5 seconds for easy reading in the dark.

Important!

• The light may be difficult to see if you turn it on under bright sunlight.

• The light is shut off automatically if the alarm starts to sound while it is on.

• You may notice a slight sound from the watch while the display is illuminated. This is the sound of EL panel vibration, and does not indicate malfunction.

Operation Guide 2514/2645

Power Supply

The power supply of this watch uses a solar cell to generate electrical power, which is stored by a rechargeable battery. Using or storing the watch where it is not regularly exposed to light, or allowing it to be blocked from light by your sleeve as you are wearing it can cause the power of the rechargeable battery to run down. To ensure stable operation, be sure to allow the watch to be exposed to light as much as possible when you are wearing or storing it.

Note that all data in memory and all settings are cleared whenever you allow the level of the rechargeable battery to drop to Level 4.

Battery Indicator

Level 1

Level 2

Level 3

Level 4

• Exposing the watch to direct sunlight or other strong light may cause the battery level indicator to momentarily indicate a level that is higher than the actual battery level. Because of this, you should wait for a short while after charging to check the battery level indicator.

Normal operation enabled.

Signal reception, tones (alarms, hourly time signal) display illumination, digital display, and button operations disabled.

All functions, including digital timekeeping, disabled.

Important!

• Even after the battery drops to Level 4, watch operation will resume as soon as charging starts. However, you should wait until the battery reaches Level 2 before setting the time and date.

❚

Start charging at Level 3!

If the Level 3 indicator starts to flash, it means that battery power is very low. Be sure to expose the watch to light for recharging as soon as possible after the Level 3 indicator starts to flash.

❚

RECOVER Indicator

If you use the light or alarms a number of times during a short period, the RECOVER indicator may appear on the display to indicate that the following operations are disabled in order to allow battery power to recover.

• Display illumination

• Alarm and hourly time signal

• Time calibration signal reception

Normal operation will return after the battery recovers.

RECOVER indicator

World Time Mode

World time lets you display the current time in any one of 30 cities (29 time zones) around the world.

• When you enter the World Time Mode, the screen for the city that was displayed when you last exited the mode appears first.

• The seconds count in the World Time Mode is linked with the Timekeeping Mode seconds count.

• Selecting 24-hour timekeeping for the Timekeeping Mode automatically switches the World Time mode to 24-hour timekeeping.

Important!

If the World Time Mode time is incorrect, correct the setting of the current time in the Timekeeping Mode.

• See “To manually set the time and date” for more information.

❚

To search for a city

(Back)

D (+) and

In the World Time Mode, use the buttons to scroll through city codes.

• Holding down either button scrolls city codes at high speed.

City Code

GMT Differential

World Time

(Forward)

A (–)

Charging Precautions

Avoid charging the watch in the following locations, and anywhere else the watch may become very hot.

• On the dashboard of an automobile parked in the sun

• Very close to an incandescent light source or other sources of

heat

• In a location exposed to direct sunlight for long periods Note that the display panel may become black under very high temperatures. This is temporary, and the display will appear normal again at lower temperatures.

Depending on the light source you are using, the case of the watch may become quite hot during charging. Take care to guard against burn injury after charging.

❚

To charge the battery

Point the solar panel (face) of the watch at a light source.

• Remember that even a partial blockage of the solar cell reduced charging efficiency.

Example: Positioning the watch

Solar Cell

• The illustration shows the resin band mode.

Using Summer Time (DST)

Summer time, or Daylight Saving Time (DST) as is it is called in some countries, calls for setting clocks ahead one hour during the summer season. Note that the use of summer time depends on the country and even the local area.

❚

To turn summer time on and off

1. In the World Time Mode,

2. Press the

• The “DST” indicator appears on the display and

• You can turn summer time on or off independently for each

use the buttons to select the city whose summer time setting you want to change.

toggle auto reception ON and OFF.

timekeeping is advanced by one hour when summer time is turned on.

World Time Mode city. Note, however, that you cannot change the summer time setting for the “GMT” (Greenwich Mean Time) zone.

D and

B button to

DST indicator

❚

Charging Guide

Starting from a full charge, it should take approximately six months of operation without further charging under the conditions described below before battery drops to Level 3.

Daily Use (All time values are approximate.)

• Display Illumination: 1.5 seconds

• Alarms: 10 seconds

• Signal reception: 3 times

Making sure the watch is regularly exposed to light ensure stable operation.

• Charge Times Required to Advance to a Higher Level

Exposure Level

(Brightness)

Outdoor Sunlight

(50,000 lux)

Sunlight Through a

Window (10,000 lux)

Daylight Through a

Window on a Cloudy

Day (5,000 lux)

Indoor Fluorescent

Lighting (500 lux)

• Note that the above charging times are for reference only. Actual charging time depends on a variety of environmental factors.

Level 4 \ Level 3 \ Level 2 \ Level 1

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)

Sunlight Through a

Window (10,000 lux)

Daylight Through a

Window on a Cloudy Day

(5,000 lux)

Indoor Fluorescent

Lighting (500 lux)

Approximate Charging Time

52 min.

2 hr.

4 hr. –––

37 hr. –––

15 hr.

67 hr.

Approximate

Charging

Time

5 min.

24 min.

48 min.

8 hr.

2 hr.

13 hr.

–––

City Code List

City

GMT

–11 –10

–9 –8 –7 –6 –5 –4 –3 –2 –1 +0 +0 +1 +1 +2 +2

City Name

Honolulu

Anchorage

Los Angeles

Denver

Chicago

New York

Caracas

Rio de Janeiro

Greenwich Mean Time

London

Pari s

Berlin

Athens

Cairo

Code

Differential

–––

HNL

ANC

LAX

DEN

CHI NYC CCS

RIO ––– ––– GMT LON

PA R BER

AT H

CAI

• The contents of the above table are current as of June 2002.

• Time differentials in the above table are in accordance with

Universal Time Coordinated (UTC).

City

Code

JRS

JED THR DXB KBL

KHI DEL DAC

RGN

BKK HKG SEL TYO ADL SYD

NOU WLG

GMT

Differential

+2 +3

+3.5

+4.5

+5.5

+6.5

+7 +8 +9 +9

+9.5

+10 +11 +12

City Name

Jerusalem

Jeddah

Teheran

Dubai Kabul

Karachi

Delhi

Dakar

Yangon

Bangkok

Hong Kong

Seoul Tokyo

Adelaide

Sydney

Noumea

Wellington

Operation Guide 2514/2645

How a Radio-controlled Watch Works

What is a radio-controlled watch?

Yo ur radio-controlled watch is designed to receive a time calibration signal that contains standard time data and adjust its current time setting accordingly.

Signal is received using

Transmitter

Cesium atomic clock

After the watch receives the Standard Time signal, it performs internal calculations to determine the current time. Because of this, there may be an error of up to one second in the displayed time.

Long-wave time calibration signal

Signal data

Time data

Watch

Internally

built-in antenna.

Decode

Watch decodes received data and converts it to time data.

Time is adjusted according to time data.

Location

Reception is difficult and may even be impossible in the locations described below. Avoid such locations when performing signal reception.

• You should think of your watch operating like a radio or TV when it is receiving the calibration signal.

Among or near buildings

Inside a vehicle (automobile, train, plane, etc.)

interference (construction site, airport, etc.)

If you are experiencing problems with reception, move away from the types of locations described above to a location with better reception, and try again.

Near high-voltage lines

Next to a household appliance or office equipment (TV, speaker, fax, PC, mobile phone, etc.)

Near mountainsIn a location where there is radio

Calibration Signal

• The Japanese calibration signal (Call Sign: JJY) is maintained by the independent Japan Ministry of Posts and Telecommunications Communication Research Laboratory (CRL). It is a long wave signal transmitted 24 hours a day from the Mt. Otakadoya transmitter (40kHz) located in Tamura-gun, Fukushima Prefecture, and from the Mt. Hagane transmitter (60kHz) located on the border between Saga Prefecture and Fukuoka Prefecture.

• The U.S. calibration signal (Call Sign: WWVB) is transmitted by the National Institute of Standards and technology from Fort Collins, Colorado.

Though the calibration signal is normally transmitted 24 hours a day, transmission may be interrupted occasionally due to maintenance, lightening, etc.

Receiving the Calibration Signal

There are two methods you can use to receive the time calibration signal.

• Auto reception (Reception is performed automatically at 2:00,

4:00, and 6:00 each morning.)

• Manual receive (You initiate reception using a button operation.)

• The watch is set up for auto reception at the factory, so all you

need to do is to place it in a location that allows good reception each night.

❚

To make reception easier

Remove the watch from your wrist and place it somewhere so its top (12 o’clock side, where the antenna is located) is facing approximately in the direction of the signal transmitter. Keep it away from metal objects.

Resin band

Metal band

• Orienting the watch so it is sideways to the transmitter makes it more difficult to receive the signal.

• Do not move the watch while it is receiving the calibration signal.

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 selecting a Home City, see “To manually set the time and date”.

Home City

TYO

LAX, DEN, CHI, NYC

Transmitter Location

Mt. Hagane (60kHz)

• Under optimum conditions, the calibration signal should be receivable up to 1,000 kilometers from the transmitter.

• Note that the wave is relatively weak at distances greater than 500km, so reception may be poor at long distances.

• Geographic contours, nearby buildings, the season, the time of day, can even make reception impossible even when you are within range of the transmitter.

• Best reception is possible late at night.

❚

Time Required for Reception

Signal reception takes anywhere from about two to six minutes.

• Note that when “FREQ. AT” is specified as the frequency selection mode, signal reception can take up to 12 minutes.

• See “Specifying the Transmitter Mode” for more information.

❚

To trigger reception manually

Hold down the about two seconds.

• The watch beeps and reception starts. Ongoing reception is indicated by the “ ” icon and the receive indicator.

❚

To stop signal reception

Press the

• All other buttons besides A are disabled during signal reception.

500km

A button for

A button.

Either the Mt. Otakadoya signal (40kHz) or the Mt.Hagane signal (60kHz)

Fort Collins, Colorado signal

1000km

Mt. Otakadoya (40kHz)

500km

1000km

❚

While reception is in progress, the “ ” icon and the receive indicator cycle from “Unstable” through “Stable” as shown below. How far they cycle depends on the signal strength. Keep the watch in a location where reception is stable while reception is in progress.

When reception is successful

After reception is complete, the watch adjusts its current time setting and then its current date setting.

• The “ ” icon and the receive indicator remain on the display to indicate that reception was successful.

• Even under optimum reception conditions, it can take about 10

When reception fails

The watch does not adjust its current time setting, and displays “ERROR!” instead.

• The display will return to the normal timekeeping screen automatically if you do not perform any operation for about one or two minutes.

Transmitter

Transmitter Location

1000km

Fort Collins

• Under optimum conditions, the calibration signal should be receivable up to 3,000 kilometers from the transmitter.

• Note that the wave is relatively weak at distances greater than 1,000km, so reception may be poor at long distances.

3000km

Receive Icon and Indicator

Receive Icon

Receive Indicator

Unstable Stable

seconds for reception to stabilize.

• Use the receive icon and receive indicator to check reception status and to determine the best location for signal reception.

• Note that weather, the time of day, surroundings, and other factors can all affect reception.

❚

To view the last reception date and time

In the Timekeeping Mode, press the

• This displays the date and time that signal reception was complete and the current time and date were adjusted.

• To return to the timekeeping screen, press the A button again.

• The display will return to the normal timekeeping screen

automatically if you do not perform any operation for about one or two minutes.

A button.

Important!

• The calibration signals received by this watch include two data groups: an hour-minute-second group and a year-month-day group.

• The “ ” icon is displayed only when both the hour-minute-second group and year-month-day group are received. It will not remain on the display if only the hour-minute-second group is received.

Hour-minute-second group and year-month-day group received “ ” displayed Hour-minute-second group only received “ ” not displayed

• If only hour, minute, and second data (no date data) is received, the last reception date shows the date that the receive operation was performed (as kept in the Timekeeping Mode).

Operation Guide 2514/2645

❚

To turn auto reception on and off

1. In the Timekeeping Mode,

• This causes the “ ” icon and

2. Press the

• Press the D button to toggle

3. When the setting is the

• This exits the setting screen.

• The display also will exit the setting screen automatically if

press the

B button.

the receive indicator to flash, which indicates the setting screen.

D button to

toggle auto reception on or off.

auto reception ON and OFF.

way you want, press the

B button.

you do not perform any operation for about two or three minutes.

Specifying the Transmitter Mode

When TYO (Tokyo) is selected as the Home City, you can select either of two different transmitters for reception.

• For information about selecting a Home City, see “To manually set the time and date”.

• The initial factory default settings of the watch are TYO (Tokyo) for the Home City and FREQ. AT (auto select) for the transmitter mode.

1. In the Timekeeping Mode,

• This causes the “ ” icon and the receive indicator to flash, which indicates the setting screen.

2. Press the

press the

B button.

C button to

change to display the Transmitter Mode setting screen.

3. Press the

• FREQ. AT

With this setting, the watch automatically selects either the Otakadoya Mountain signal (40kHz) or the Hagane Mountain signal (60kHz), whichever is strongest.

• The transmitter that was last received successfully is given priority for the next receive operation.

• FREQ. 40

With this setting, the watch always receives the Mt. Otakadoya signal (40kHz).

• FREQ. 60

With this setting, the watch always receives the Mt. Hagane signal (60kHz).

4. When the setting is the

• 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.

D button to

cycle through the available Transmitter Mode settings, described below.

way you want, press the

B button.

Calibration Signal Reception Precautions

• Auto reception can be performed while the watch is in the Timekeeping Mode or World Time Mode only.

• Operating any button while auto reception is in progress will cause the watch to beep and then exit the receive operation.

• Make sure you are within the range of the calibration signal transmitter before performing the reception operation. Remember that geographic contours, nearby buildings, the season, the time of day, can even make reception impossible even when you are within 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 States, or in any area that is outside the range of one of the receivable time calibration signal transmitters.

• When the watch is unable to adjust its time signal using the calibration signal for some reason, timekeeping accuracy is within

±15 seconds per month.

• Strong electrostatic charge can cause timekeeping error.

• Signal reception is cancelled if an alarm starts to sound while it is

being performed.

• The watch's built-in calendar runs up to the year 2039. Signal reception after that causes an error, and the date remains displayed as December 31, 2039.

Troubleshooting

Cannot perform manual reception.

Cause: • Manual receive can be performed in the

Corrective Measures: • Perform manual receive in the

The “ ” icon is not on the display even though auto signal reception is turned on.

Cause: • The “ ” icon appears after the

Corrective Measures: • Check to make sure the watch is in a

Timekeeping Mode only.

• The Home City is set to a city other than TYO (Tokyo), NYC (New York), CHI (Chicago), DEN (Denver), or LAX (Los Angeles).

Timekeeping Mode.

• Change Home City to TYO (Tokyo), NYC (New York), CHI (Chicago), DEN (Denver), or LAX (Los Angeles). For details, see “To manually set the time and date”.

watch successfully receives the calibration signal and adjusts the current time and date settings.

• A single receive operation was not successful.

• The “ ” icon is displayed only when both the hour-minute-second group and yearmonth-day group were received. It will not remain on the display if only the hourminute-second group is received.

• The watch is not in the Timekeeping Mode or World Time Mode when an auto reception time is reached.

location where it can receive the signal.

• Place the watch in a location where reception conditions are good.

• Make sure that the watch is in the Timekeeping Mode or World Time Mode during the auto reception times.

• Note that manual reception also clears the “ ” icon from the display.

Time setting is incorrect following signal reception.

Cause: • Summer time is turned on or the wrong

Corrective Measures: • If the time is advanced by one hour, it

If you cannot receive the calibration signal or if the current time setting is incorrect after signal reception, check the current setup of the watch.

• The following are the watch’s factory default settings, which are configured automatically whenever you have the battery of the watch replaced.

Auto Receive

Transmitter

Home City

Summer Time

Home City is selected.

probably means that summer time (indicated by the DST indicator on the display) is turned on. If the time is off by more than one hour, it probably means that the Home City is selected. Correctly configure the summer time and Home City settings as detailed under “To manually set the time and date”.

Auto Japan transmitter select (40kHz/ 60kHz)

Tokyo

Auto (according to signal data)

Operation Guide 2514/2645

Data Memory Mode

You can use the Data Memory Mode to store e-mail addresses, Web site URLs, and other information for instant recall whenever you need it.

• The theoretical maximum number of records is 40, but the actual maximum depends on the number contained in each record.

• If each record contains 63 characters, for example, you can store up to five records.

• If each record contains seven characters, you will be able to store up to 40 records.

• When you display the Data Memo screen, the record that was displayed when you last exited the Data Memory Mode appears first.

❚

To view Data Memory records

1. In the Data Memory Mode,

• Holding down the A button advances the hand at high speed.

• As shown in the example below, scrolling through Data Memory records also displays a remaining memory screen. If there is no data currently in Data Memory, only the remaining memory screen appears.

Example: When there are three Data Memory records

press the

A button to

scroll through Data Memory records.

Record 1 Record 2 Record 3

(Forward)

Record Number

Remaining

Memory

2. When the record whose

contents you want to view is on the display, press

the

D button.

• This causes the record's data to start scrolling from right to left, six characters at a time.

• Holding down the D button advances the hand at high speed.

• The end of the record is indicated by the “ < ” symbol.

• The data of the currently displayed record does not scroll

when you press the D button if it contains five or fewer characters.

❚

To create a new Data Memory record

1. In the Data Memory Mode,

• If the remaining memory screen shows “0%”, it means that memory is full and further data storage is not possible. If you want to input more data, you first need to delete existing data that you no longer need.

• See “To edit or delete a Data Memory record”.

2. Press the

• This is the setting screen.

press the buttons at the same time to display the remaining memory screen.

the first character of the data field of a new record starts to flash.

A and

B button so

Remaining Memory

First Data Character

3. Use the

• Holding down either button

Supported Characters

• Katakana: ア to ンァ to ォッャ to ョ゛゜

• Lower Case Alpha: a to z

• Symbols: ＊―＿＠.／？＃！％.：，＆＝÷×−＋

• Upper Case Alpha: A to Z

• Numerals: 0 to 9

• Holding down the D or A button while inputting katakana

4. When the character you

• Repeat steps 3 and 4 as many times as necessary to

D (+) button and

A (–) button to scroll

through characters at the current cursor position.

scrolls characters at high speed.

will jump between rows ( ア<->カ<->サ<->タ, etc.)

want is at the current cursor position, press the

C button to move the

cursor one character to the right.

input all of the characters for the record you are creating.

(Back)

(Forward)

5. When the text is the way

you want, press the button to save it.

• “SAVE!” will flash on the display as the record is being saved. After the save operation is complete, the watch will exit 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.

• If you want to create another record, repeat steps 1 through

• Records are stored in the same sequence they are input.

❚

To edit or delete a Data Memory record

1. In the Data Memory Mode, use the

the record you want to edit or delete.

2. Press the

• This causes the first character of the displayed record to flash, which indicates the setting screen.

B button.

A button to display

3. Edit or delete the data as described below.

• To edit the record’s data

Use the C button to move the cursor to the location of the character you want to change, and then use the D and A buttons to scroll through characters until the one you want to change to is displayed.

• To delete the record’s data

Press the D and A buttons at the same time. This causes “CLEAR!” to flash on the display as the record is deleted.

• After deleting a record's data, you can input new data, if you want.

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

4. After editing or deleting the record, press the

to exit the setting screen.

• Deleting a record’s data deletes the record, and causes the remaining records to shift upwards.

B button

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

Each press of the

• Pressing the A button while timing is being performed freezes the current elapsed time on the display, but timing of the next split continues internally. This condition is indicated by the “SPL” (split) indicator on the display.

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

• Pressing the A button while timing is stopped resets the stopwatch.

D button starts or stops the stopwatch.

1/100-second

Seconds

(Split/Reset)

(Start/Stop)

Minutes

Hours

Elapse Time Measurement

Start Stop Reset

Cumulative Time Measurement

Pressing the D button to restart the stopwatch without resetting it to all zeros resumes elapsed time measurement from where it was last stopped.

❚

Split Time Measurement

Record split Release split ResetStopStart

❚

1st and 2nd Place Finishers

Start 1st finisher

(Displays time

of 1st finisher.)

2nd finisher Displays time

of 2nd finisher.

Reset

Operation Guide 2514/2645

Alarm Mode

Using the Alarms

❚

Alert Types

You can configure an alarm with an hour and minute, as well as a text message (up to eight characters long). You can configure an alarm to perform either of the two following alert operations.

• Beeper Alert Signals arrival of an alarm time with a beeper.

• Silent Alert Signals arrival of an alarm time with a flashing display indicator.

• See “To turn an alarm on and off, and select an alert type” for information about using alerts.

• If you specify message text, the message is displayed for one minute in the Timekeeping Mode when the alarm time is reached.

❚

Alarm Types

This watch has five alarms: four daily alarms and one snooze alarm.

Daily Alarm (AL1 to AL4)

The alert operation is performed for 10 seconds when the alarm time is reached.

Snooze Alarm (SNOOZE)

With the snooze alarm, the alert operation is performed for 10 seconds when the alarm time is reached, and up to seven times at five-minute intervals thereafter. Pressing any button stops the alert operation, but the alert operation will start again after five minutes.

8. When the character you

want is at the current cursor position, press the

C button to move the

cursor to the right.

Repeat steps 7 and 8 as many times as necessary to input up to eight characters.

9. When the text is the way

you want, press the button to save it.

• 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.

❚

To set an alarm time

1. In the Alarm Mode, use

the

D button to scroll

through the alarm screens in the sequence shown below until the one you want is displayed.

• The indicator of the currently selected alarm is shown on the display.

Alarm 1

(ALARM1)

Hourly Time

Signal (SIGNAL)

Alarm Indicators

❚

To modify alarm settings

1. In the Alarm Mode, use the

alarm you want to modify.

2. Press the

display.

• This is the setting screen.

Alarm 1

B button so the hour digits flash on the

Alarm 1 Indicator

Alarm 2

(ALARM2)

Snooze Alarm

(SNOOZE)

Alarm 2

Alarm 3

Alarm 4

Snooze Alarm

D button to display the

Alarm 3

(ALARM3)

Alarm 4

(ALARM4)

3. Modify the alarm settings.

Use the

C button to move the cursor to location of the

character you want to change, and then use the

A buttons to scroll through characters until the one you

want to change to is displayed.

• To clear an alarm, press both the D and A buttons. This causes “CLEAR!” to appear, clears any message text, and sets the alarm time to 12:00 a.m. (midnight).

4. When the alarm is the way you want, press the

button to save it.

D and

2. Press the

• This is the setting screen.

• If the currently selected alarm

was turned off, the beeper alert turns on at this time, indicated by the alarm indicator on the display.

3. Use the

• Holding down either button scrolls characters at high speed.

• When setting the hour, make sure you specify AM (no indicator) or PM (P) correctly when using 12-hour timekeeping, or that you specify the correct 24-hour time.

4. Press the

❚

To turn an alarm on and off, and select

B button until

the hour digits flash on the display.

D (+) and

buttons to change the hour setting.

move the flashing to the minute digits.

A (–)

C button to

Hour

Alarm Indicator

an alert type

1. In the Alarm Mode, use

the

D button to scroll

through the alarm screens in the sequence shown below until the one you want is displayed.

• In the Alarm Mode, use the D button to display the alarm you want to turn on or off.

2. Use the

A button to cycle

through the alarm settings in the sequence shown below.

Alarm Indicator

Alert Indicator

Minute

(Back)

(Forward)

(Back)

(Forward)

5. As with the hour setting,

6. Press the

• This causes the first character

7. Use the

• Holding down either button

Supported Characters

• Katakana: ア to ンァ to ォッャ to ョ゛゜

• Lower Case Alpha: a to z

• Symbols: ＊―＿＠.／？＃！％.：，＆＝÷×−＋

• Upper Case Alpha: A to Z

• Numerals: 0 to 9

• Holding down the D or A button while inputting katakana

• Alarm Off

No alert operation is performed.

• Beeper Alert On

A beeper sounds for 10 seconds when the alarm time is reached.

• The applicable alarm indicator flashes while the beeper is

• If there is message text, it appears on the Timekeeping

• Silent Alert On

The applicable alarm indicator flashes on the display, without sounding the beeper.

• If there is message text, it appears on the Timekeeping

❚

To test the beeper alert

In the Alarm Mode, hold down the D button to sound the beeper.

use the

D (+) and

buttons to change the minute setting.

display the message text input screen.

of the message text to flash, which indicates the input screen.

D (+) and

buttons to scroll through characters at the current cursor position.

scrolls characters at high speed.

will jump between rows ( ア<->カ<->サ<->タ, etc.)

sounding.

Mode screen for one minute.

A (–)

C button to

A (–)

First Message Text Character

(Back)

(Forward)

Alarm Off

Beeper Alert On

Silent Alert On

Operation Guide 2514/2645

Important!

• Pressing any button while the beeper is sounding stops it. The message remains on the Timekeeping Mode screen even if you stop the beeper.

• Changing to another mode or performing any operation that changes the display contents clears the message text.

• With the snooze alarm, the alert operation is performed for 10 seconds when the alarm time is reached, and up to seven times at five-minute intervals thereafter. The snooze indicator flashes while the snooze alarm is active (indicating that the alert will be performed again).

• Use the procedure under “To turn an alarm on and off, and select an alert type” to turn off the snooze alarm so it does not sound any more.

• Performing any of the following operations while the snooze indicator is flashing on the display cancels the snooze operation and stops the flashing.

• Displaying the Timekeeping Mode setting screen

• Displaying the Alarm Mode setting screen

5. Press the

• OFF DST

This setting turns off summer time, and displays the current time normally.

• ON DST

This setting turns on summer time.

• Selecting this setting displays the DST indicator, and advances the current time setting by one hour.

• AUTO DST

This setting enables the auto summer time setting, which turns summer time on or off in accordance with the received time calibration signal.

• This setting uses Japan summer time data when TYO is selected as the Home City code, and U.S. summer time data when NYC, CHI, DEN, or LAX is selected as the Home City code.

• In the United States, Daylight Saving Time (summer time) is from 2:00 a.m. on the first Sunday in April until 1:00 a.m. on the last Sunday in October.

• Note that the above setting toggles between “OFF DST” and “ONDST” when any city code other than HKG, SEL, TYO, NYC, CHI, DEN, LAX, ANC, or HNL is selected as the Home City.

D button to select the summer time setting

you want.

Using the Hourly Time Signal

The hourly time signal causes the watch to beep every hour on the hour.

❚

To turn the hourly time signal on and off

1. In the Alarm Mode, use

the

D button to display

the screen for the hourly time signal (SIGNAL).

2. Press the

6. Use the

Auto Reception

Power Saving

Day Month Year

7. Use the

A button to

toggle the hourly time signal on (hourly time signal indicator displayed) or off (no indicator displayed).

C button to cycle

through the time and date settings shown below. Each press of the causes the applicable setting to flash.

Setting

On/Off

selected setting.

C button

Time and Date Setting

D (+) and

Transmitter

Mode

Minute

A (–) buttons to change the currently

Hour

Hourly Time Si

Home City

Summer Time

Seconds

nal Indicator

12/24-hour

Setting

Setting the Time and Date Manually

You can use the following procedure to set the current time and date of the Home City that you have selected in the Timekeeping Mode. You can also turn Power Saving on and off.

❚

To manually set the time and date

1. In the Timekeeping Mode,

• This is the setting screen.

2. Press the

• The currently selected city code will be flashing on the screen.

To select 12/24-hour timekeeping

While the 12/24-hour setting is selected, press the D button to toggle the timekeeping format between 12-hour (“12H” indicator) and 24-hour (24H indicator).

press the

B button so

the receive icon and indicator flash on the display.

C button twice

to change to display the Home City setting screen.

(2 times)

12/24-hour

To reset the seconds to 00

While the seconds are selected, press the D button to reset them to 00 in accordance with the time signal on the radio, TV, etc.

• 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.

Resets to 00.

To change the hour, minutes, year, month, or day setting

Press the D button to increase the selected setting or the A button to decrease it.

• Holding down either button scrolls characters at high speed.

YearDayMonth

(Back)

3. While the Home City code

is flashing, use the

and

A (–) buttons to

scroll through the city codes.

• Holding down either button scrolls characters at high speed.

• See the “City Code List” for more information.

4. Press the

the summer time setting is displayed.

• See “Using Summer Time (DST)” for more information about summer time.

❚

To turn Power Saving on and off

While the Power Saving setting is selected, press the D button to toggle it ON and OFF.

Repeat the above step as many times as necessary to select each setting and change it as required.

• When setting the hour, make sure you specify AM (no indicator) or PM (P) correctly when using 12-hour timekeeping, or that you specify the correct 24-hour time.

• You can set the year within the range of 2000 to 2039. The day of the week is set automatically in accordance with the date you set.

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

8. When the text is the way you want, press the

button to save it.

• 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.

D (+)

C button so

City Code

(Back)

(Forward)

Minute

(Forward)

Hour

Casio 2645 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Power Saving

Display IlluminationModes and Display Screens

Power Supply

World Time Mode

How a Radio-controlled Watch Works

Data Memory Mode

Stopwatch Mode

Alarm Mode

Setting the Time and Date Manually