Casio 2688, 2638, 2608 User Manual

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Casio 2688, 2638, 2608 User Manual

MO0306-EA

Operation Guide 2608 2638 2688

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to carefully read this manual and keep it on hand for later reference when necessary.

This watch does not have a time zone that corresponds to the Greenwich Mean Time differential of –3.5 hours. Because of this, the radio-controlled timekeeping and World Time functions will not display the correct time for Newfoundland, Canada.

Expose the watch to bright light to charge its battery before using it.

You can use this watch even as its battery is being charged by exposure to bright light.

Be sure to read “Battery” of this manual for important information you need to know when exposing the watch to bright light.

If the display of the watch is blank...

If the sleep indicator (S /SLEEP ) is on the display, it

Sleep indicator

means that the display is blank because the watch’s

 

Power Saving function has shut it to conserve power.

 

Power Saving automatically turns off the display and

 

enters a sleep state whenever your watch is left in an

 

area where it is dark for a certain period.

 

The initial factory default setting is Power Saving on.

 

The watch recovers from the sleep state if you move it

to a well-lit area*, if you press any button, or if you angle the watch towards your face for reading.

*It can take up to two seconds for the display to turn on.

See “Power Saving Function” for more information.

General Guide

Press Cto change from mode to mode.

In any mode, press Lto illuminate the display.

World Time Mode

Timekeeping Mode

Press C.

Radio-controlled Atomic Timekeeping

PM

indicator Day of week

Month – Day

Hour : Minutes Seconds

Current Time Setting

This watch receives a time calibration signal and updates its time setting accordingly. The time calibration signal includes both Standard Time and Daylight Saving Time (summer time) data.

This watch is designed to pick up the time calibration signal transmitted from Fort Collins, Colorado (USA). Reception is possible within North America*.

*The term “North America” in this User’s Guide refers to the area that consists of Canada, the continental United States, and Mexico.

This watch automatically adjusts its time setting in accordance with a time calibration signal. You can also perform a manual procedure to set the time and date, when necessary.

The first thing you should do after purchasing this watch is to set your Home City, which is the city where you will normally use the watch. For more information, see “To set your Home City” below.

When using the watch outside of the range of the transmitter in Fort Collins, you need to manually adjust the time as required. See “Timekeeping” for information about manual settings.

To set your Home City

City code

E/C/M/P indicator

1.In the Timekeeping Mode, hold down A until the city code starts to flash, which indicates the setting screen.

2.Use D(east) and B(west) to select the city code you want to use as your Home City.

The following are the city codes for major cities in North America.

LAX(P (Pacific) indicator):

Los Angeles, San Francisco, Las Vegas, Seattle, Vancouver, Tijuana

DEN(M (Mountain) indicator):

Denver, El Paso, Edmonton, Culiacan CHI(C (Central) indicator):

Chicago, Houston, Dallas/Fort Worth, New Orleans, Winnipeg, Mexico City

NYC(E (Eastern) indicator):

New York, Detroit, Miami, Boston, Montreal

Note that this watch does not have a city code that corresponds to Newfoundland.

3.Press Atwice to exit the setting screen.

The first press of Adisplays the 12/24-hour setting screen. Pressing Aagain exits the setting screen.

Important!

Normally, your watch should show the correct time as soon as you select your Home City code. If it does not, it should adjust automatically after the next auto receive operation (in the middle of the night). You can also perform manual receive or you can set the time manually.

If you are in an area that does not use Daylight Saving Time (summer time), turn off the DST setting.

Time Calibration Signal Reception

There are two different methods you can use to receive the time calibration signal: auto receive and manual receive.

About This Manual

The operational procedures for Modules 2608, 2638 and 2688 are identical. All of the illustrations in this manual show Module 2608.

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.

(Light)

(Light)

(Light)

Module 2608

Module 2638

Module 2688

Time Recorder Mode

Stopwatch Mode

Alarm Mode

 

 

Auto Receive

With auto receive, the watch automatically picks up the time calibration signal four times a day at 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m. For more information, see “About Auto Receive”.

Manual Receive

Manual receive lets you start a time calibration receive operation with the press of a button. For more information, see “To perform manual receive”.

Important!

When getting ready to receive the time calibration signal, position the watch as shown in the nearby illustration, with its 12 o’clock side facing towards a window. Make sure there are no metal objects nearby.

Resin Band Metal Band

The watch should not be on its side or facing the wrong way.

Proper signal reception can be difficult or even impossible under the conditions listed below.

Inside or

Inside a

Near

Near a

Near high-

Among or

among

vehicle

household

construction

tension

behind

buildings

 

appliances or

site, airport, or

power lines

mountains

 

 

office

other sources

 

 

 

 

equipment,

of electrical

 

 

 

 

or a mobile

noise

 

 

 

 

phone

 

 

 

Signal reception is normally better at night than during the day.

Time calibration signal reception takes from two to six minutes, but in some cases it can take as long as 12 minutes. Take care that you do not perform any button operations or move the watch during this time.

600 miles

2,000 miles

 

Fort Collins

Under good reception conditions, signal reception is possible within a radius of about 2,000 miles (3,000 kilometers) from the Fort Collins transmitter.

1

Receiving indicator
Module 2638
DST indicator
Module 2608

Operation Guide 2608 2638 2688

At distances further than about 600 miles (1,000 kilometers) from the transmitter, signal reception may not be possible during certain times of year or times of day. Radio interferance may also cause problems with reception.

See the information under “Signal Receive Troubleshooting” if you experience problems with time calibration signal reception.

About Auto Receive

When auto receive is turned on, the watch automatically starts to receive the time calibration signal when the time in the Timekeeping Mode reaches 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m. each day (calibration times).

Note

The auto receive operation is performed only if the watch is in the Timekeeping Mode or World Time Mode when one of the calibration times is reached. It is not performed if a calibration time is reached while an alarm is sounding, or while you are configuring settings (while settings are flashing on the display).

Auto receipt of the calibration signal is designed to be performed early in the morning, while you sleep (provided that the Timekeeping Mode time is set correctly). Before going to bed for the night, remove the watch from your wrist, and put it in a location where it can easily receive the signal.

When auto receive is turned on, the watch receives the calibration signal for two to six minutes everyday when the Timekeeping Mode time reaches each of the calibration times. Do not perform any button operation within six minutes before or after any one of the calibration times. Doing so can interfere with correct calibration.

Remember that reception of the calibration signal depends on the time kept in the Timekeeping Mode. The receive operation will be performed whenever the display shows any one of the calibration times, regardless of whether or not the Timekeeping Mode time is actually the correct time.

When two, three, or four receptions are successful, the watch uses the data of the last reception for calibration. When only one reception is successful, the watch uses the data of the successful reception.

About the Receiving Indicator

The receiving indicator shows the strength of the calibration signal being received. For best reception, be sure to keep the watch in a location where signal strength is strongest.

Modules 2608, 2638, and 2688

Module 2608 Module 2638

Receiving indicator

Weak

Strong

(Level 1)

(Level 4)

 

Even in an area where signal strength is strong, it takes about 10 seconds for signal reception to stabilize enough for the receiving indicator to indicate signal strength.

Use the receiving indicator as a guide for checking signal strength and for finding the best location for the watch during signal receive operations.

Following reception of the time calibration signal and calibration of the watch’s time setting, the Level 4 receiving indicator will remain on the display in all modes. The Level 4 receiving indicator will not be displayed if signal reception was unsuccessful or after you adjust the current time setting manually.

The Level 4 receiving indicator is displayed only when the watch is able to successfully receive both time and date data. It does not appear when only time data is received.

The Level 4 receiving indicator indicates that at least one of the auto calibration signal receive operations was successful. Note, however, that the Level 4 receiving indicator is cleared from the display at 3:00 a.m. each day.

To perform manual receive

1. Place the watch on a stable surface so its top (12 o’clock side) is facing towards a window.

2. In the Timekeeping Mode, hold down D for about two

seconds until the watch beeps.

Release D and the message RC! appears to indicate that signal reception has started.

Time calibration signal reception takes from two to six minutes. Take care that you do not perform any button operations or move the watch during this time.

After signal reception is complete, the display of the watch changes to the Last Signal screen.

Note

To interrupt a receive operation and return to the Timekeeping Mode, press D.

If the receive operation is unsuccessful, the message ERR appears on the display for about one or two minutes. After that, the watch returns to the Timekeeping Mode.

You can also change from the Last Signal or ERR screen to the normal timekeeping screen by pressing D.

To turn auto receive on and off

 

 

 

 

 

 

 

 

 

 

 

1. In the Timekeeping Mode, hold down Auntil the city

 

 

 

 

 

 

 

 

 

 

 

code starts to flash, which indicates the setting screen.

 

 

 

 

 

 

 

 

 

 

 

2. Press Ctwice to move the flashing to the auto receive

 

 

 

 

 

 

 

 

 

 

 

on/off setting.

 

l l l l l l l ll

l

l l l l l l

3. Press Dto toggle auto receive on (ON) and off (OF).

l

 

 

 

 

 

 

 

 

l

If the current Home City setting is a city code that

l

 

 

 

 

 

 

 

 

 

l l

l

 

 

 

 

 

 

 

 

 

l

l l

l l l

l

l

 

 

 

 

l

does not support signal receive, “xx” appears in

 

 

 

l

l

l l

l

l

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

place of the on/off indicator. This means you cannot

On/off status

 

turn auto receive on or off.

4. Press Atwice to exit the setting screen.

For information about city codes that support signal receive, see “To set your Home City”.

To display the Last Signal screen

In the Timekeeping Mode, press D to display the Last Signal screen (indicated by GET). The Last Signal screen shows the date and time of the last successful time calibration signal reception.

PM

Day of week

Receive time

indicator

 

 

 

Press D.

 

 

Month – Day

Receive date

 

Hour : Minutes Seconds

Last Signal Screen

 

 

Signal Receive Troubleshooting

Check the following points whenever you experience problems with calibration signal reception.

Problem

Probable Cause

What you should do

Cannot perform

The watch is not in the Timekeeping Mode.

Enter the Timekeeping Mode

manual receive.

Your current Home City is not one of the

and try again.

 

following city codes:

Select LAX, DEN, CHI, or

 

LAX, DEN, CHI, or NYC.

NYC as your Home City.

Auto receive is

You changed the time setting manually.

Perform manual signal receive

turned on, but

The watch was not in the Timekeeping

or wait until the next auto

the Level 4

or World Time Mode, or you performed

signal receive operation is

receiving

some button operation during the auto

performed.

indicator does

receive operation.

Check to make sure the

not appear on

Even if receive is successful, the Level

watch is in a location where it

the display.

4 receiving indicator disappears every

can receive the signal.

 

day at 3 am.

 

 

Time data (hour, minutes, seconds) only

 

 

was received during the last receive

 

 

operation. The Level 4 receiving

 

 

indicator appears only when time data

 

 

and date data (year, month, day) are

 

 

both received.

 

Time setting is

If the time is one hour off, the DST

Change the DST setting to

incorrect

setting may be incorrect.

Auto DST.

The Home City code setting is not

Select the correct Home City

following signal

correct for the area where you are using

code.

reception.

 

the watch.

 

For further information, see “Important!” under “Time Calibration Signal Reception” and “Radio-controlled Atomic Timekeeping Precautions”.

World Time

City code

Home city time

Current time in the selected city code

World Time shows the current time in 30 cities (29 time zones) around the world.

For full information on city codes, see the “City Code Table”.

The current time for all city codes in the World Time Mode is calculated in accordance with the Greenwich Mean Time (GMT) differential for each city, based on the your Home City time setting.

All of the operations in this section are performed in the World Time Mode, which you enter by pressing C.

To view the time for another city code

While in the World Time Mode, press D to scroll through the city codes (time zones) to the east or Bto scroll to the west.

If the current time shown for a city is wrong, check your Timekeeping Mode time and Home City settings and make the necessary changes.

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

1. In the World Time Mode, use Band Dto display the city code (time zone) whose Standard Time/Daylight Saving Time setting you want to change.

2. Hold down A to toggle Daylight Saving Time (DST

indicator displayed) and Standard Time (DST indicator

not displayed).

The DST indicator is on the display whenever you

display a city code for which Daylight Saving Time is

turned on.

Note that the DST/Standard Time setting affects only the currently displayed city code. Other city codes are not affected.

Daylight Saving Time (DST) advances the time setting

by one hour from Standard Time. Remember that not all

countries or even local areas use Daylight Saving Time.

The watch will perform a signal receive operation even if

it is in the World Time Mode when a calibration time is reached. If this happens, the World Time Mode time settings will be adjusted in accordance with the Home City time.

DST indicator

Module 2688

Time Recorder

Time record number

Recorded date (Month–Day)

Recorded time

(Hour : Minutes seconds)

The Time Recorder lets you store up to 30 records of the current time (month, day, hour, minutes, seconds, and DST on/off setting) with the touch of a button. One way you can use the Time Recorder is to record the start time and the end time of a particular event.

To record a Time Recorder time

In the Timekeeping Mode, hold down Bto record the Home City time (month, day, hour, minutes, seconds, and DST on/off setting).

The recorded time flashes for about two seconds, and then it is assigned a record number. After that, the Timekeeping Mode screen appears.

Records are assigned numbers sequentially from #01 through #30.

Storing a new time record when there are already 30 records stored in memory automatically deletes record #01, shifts the remaining records upwards by 1, and stores the new record as #30.

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