Casio 2628 User Manual

MO0608-EA

Operation Guide 2628

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.

••

• 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.

Keep the watch exposed to bright light

Bright Light

Solar cell

• 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 cause 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.)

Charge

General Guide

• Press C to change from mode to mode.

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

Timekeeping Mode

The electricity generated by the solar cell of the watch is stored by a built-in 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 only partially covered.

Bright Light

Electrical energy

All

LEVEL 1

functions

LEVEL 2

LEVEL 3

Rechargeable battery

enabled

charge

Sunrise/Sunset Mode

Press C.

▲

Dis-

LEVEL 1

LEVEL 2

LEVEL 3

Some or all functions disabled

• 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 five minutes exposure to bright sunlight coming in through a window

Approximately 50 minutes exposure to indoor fluorescent lighting

• Be sure to read “Power Supply” 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” for more information.

About This Manual

(Light)

• 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.

Bearing Mode Time Recorder Mode World Time Mode

▲

Stopwatch Mode

▲

Alarm Mode

▲

Radio-controlled Atomic Timekeeping

This watch receives a time calibration signal and updates

Day of week

indicator

Month – Day

Hour : Minutes Seconds

• The first thing you should do after purchasing this watch is to set your Home City, which is the city where you normally will 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 adjust the time manually as required. See “Timekeeping” for information about manual settings.

To set your Home City

E/C/M/P indicator

3. Press A twice to exit the setting screen.

• The first press of A displays the 12/24-hour setting screen. Pressing A again exits the setting screen.

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.

Current Time Setting

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

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

City code

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.

(P (Pacific) indicator):

LAX

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

(M (Mountain) indicator):

DEN

Denver, El Paso, Edmonton, Culiacan

(C (Central) indicator):

CHI

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

(E (Eastern) indicator):

NYC

New York, Detroit, Miami, Boston, Montreal

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

Near hightension power lines

▲

Among or behind mountains

▲

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.

• Auto Receive

With auto receive, the watch picks up the time calibration signal automatically five times a day at midnight, 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00 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.

12 o’clock

• Make sure the watch is facing the right way.

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

below.

Inside or among buildings

Inside a vehicle

Near household appliances or office equipment, or a mobile phone

Near a construction site, airport, or other sources of electrical noise

Operation Guide 2628

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

• 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.

Reception Range

600 miles

• 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.

• Even when the watch is within the reception range of the transmitter, signal reception is impossible if the signal is blocked by mountains or other geological formations between the watch and signal source.

• Signal reception is affected by weather, atmospheric conditions, and seasonal changes.

• 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 starts to receive the time calibration signal automatically when the time in the Timekeeping Mode reaches midnight, 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. each day (calibration times). The watch will also perform an additional auto receive at 5:00 a.m. if none of the regularly scheduled auto receives are successful.

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 receive 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 receive the signal easily.

• 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. Avoid performing 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 actually is 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.

Weak

• Use the receiving indicator as a guide for checking signal strength and for finding the

• Even in an area where signal strength is strong, it takes about 10 seconds for signal

• Following reception of the time calibration signal and calibration of the watch’s time

• The Level 4 receiving indicator is displayed only when the watch is able to receive

• The Level 4 receiving indicator indicates that at least one of the auto calibration

Receiving indicator

best location for the watch during signal receive operations.

reception to stabilize enough for the receiving indicator to indicate signal strength.

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.

both time and date data successfully. It does not appear when only time data is received.

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

Receiving indicator

Note

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

• If the receive operation is unsuccessful, the message

for about one or two minutes. After that, the watch returns to the Timekeeping Mode.

• You can also change from the Last Signal or timekeeping screen by pressing D.

To turn auto receive on and off

On/off status

(Level 1)

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

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.

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

2. Press C twice to move the flashing to the auto receive on/off setting.

3. Press D to toggle auto receive on (ON) and off (OFF).

• If the current Home City setting is a city code that

does not support signal receive, “xx” appears in place of the on/off indicator. This means you cannot turn auto receive on or off.

4. Press A twice to exit the setting screen.

• For information about city codes that support signal

receive, see “To set your Home City”.

2,000 miles

Fort Collins

RC! appears to indicate

ERR appears on the display

ERR screen to the normal

Strong

(Level 4)

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.

• If you do not press D to return from the last signal screen to the timekeeping

screen, the watch will return automatically after about two or three minutes.

Day of week

indicator

Press D.

▲

Timekeeping Screen

Signal Receive Troubleshooting

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

Problem

Cannot perform manual receive.

Auto receive is turned on, but the Level 4 receiving indicator does not appear on the display.

Time setting is incorrect following signal reception.

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

Month – DayHour : Minutes Seconds

Probable Cause

•

The watch is not in the Timekeeping Mode.

• Your current Home City is not one of the following city codes: LAX, DEN, CHI, or NYC.

• You changed the time setting manually.

• The watch was not in the Timekeeping

or World Time Mode, or you performed some button operation during the auto receive operation.

•

Even if receive is successful, the Level 4 receiving indicator disappears every 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.

• If the time is one hour off, the DST setting may be incorrect.

• The Home City code setting is not correct for the area where you are using the watch.

Receive time

▲

Receive date

Last Signal Screen

What you should do

• Enter the Timekeeping Mode and try again.

• Select LAX, DEN, CHI, or NYC as your Home City.

• Perform manual signal receive or wait until the next auto signal receive operation is performed.

• Check to make sure the watch is in a location where it can receive the signal.

• Change the DST setting to Auto DST.

• Select the correct Home City code.

Sunrise/Sunset Mode

Sunrise/

Sunrise time

• All of the operations in this section are performed in the Sunrise/Sunset Mode,

To specify a city code to check its sunrise and sunset times

1. Enter the Timekeeping Mode.

2. Hold down A until the current city code setting starts to flash. This is the setting

3. Use D (Eastward) and B (Westward) to select the city code whose sunrise and

4. Press A twice to exit the setting screen.

Sunset graph

Sunset time

which you enter by pressing C.

screen.

sunset times you want to view.

• For details about city codes, see the “City Code Table”.

To configure longitude, latitude and GMT differential settings

Longitude/Latitude

Setting Screen

▲

Press C.

▲

GMT Differential

Setting Screen

You can use the Sunrise/Sunset Mode to display the sunrise and sunset times for a particular date (year, month, day) specified by you.

• Before trying to use the Sunrise/Sunset Mode, you need to configure settings for the city code, longitude, latitude, and GMT differential for the location whose sunrise and sunset times you want to view.

• The factory default configuration of the location is: Latitude: North 35 degrees; Longitude: East 140 degrees; GMT Differential: +9 hours.

• You can find latitude, longitude, and GMT differential for various cities around the globe in the “Site Data List”.

• The sunrise and sunset information that initially appears when you enter the Sunrise/Sunset Mode is that for the current date as kept in the Timekeeping Mode.

1. Enter the Sunrise/Sunset Mode.

2. Hold down A to cycle through the screens until the

longitude/latitude setting screen appears.

3. Use B to set the longitude and D to set the latitude.

• Pressing the buttons will change the longitude and latitude values as shown below.

Press this button:

Longitude

Latitude

4. Press C to display the GMT differential setting screen.

5. Use D (+) and B (–) to change the GMT differential in

0.5 hour increments.

6. Press A to exit the setting screen.

• This will cause the display to show the date (year, month, and day), followed by the sunrise and sunset time for that date.

To cycle the value in this sequence:

179°W to 1°W, 0 °E to 180°E 65°S to 1°S, 0°N to 65°N

Operation Guide 2628

To view the sunrise/sunset time for a particular date

Sunrise time

Sunset time

Note

• Sunrise/sunset time is displayed in 5-minute units.

• If you think that the sunrise and/or sunset times are not correct for some reason,

check the watch’s city code, longitude, latitude, and GMT defferential settings.

• The sunrise and sunset times displayed by this watch are times at sea level. Sunrise and sunset times are different at altitudes other than sea level.

Sunrise/Sunset Graphic

In the Sunrise/Sunset Mode, the graphic in the upper right corner of the display shows the daylight hours and nighttime hours for the currently selected date. In the Timekeeping Mode, the graphic shows the daylight hours and nighttime hours for today’s date.

• The dark segments of the graphic indicate nighttime hours, while the light segments indicate daytime hours.

• The flashing segment in the graphic in the Timekeeping Mode is the one that represents the current time.

• Each graphic segment represents one hour.

Sunrise time

10:00

9:00

8:00

7:00

6:00

5:00

4:00

3:00

2:00

Sunrise/Sunset Mode Graphic Timekeeping Mode Graphic

1. Enter the Sunrise/Sunset Mode.

• This will display the sunrise and sunset times for the current date (as kept by the Timekeeping Mode) at the location specified by the city code, latitude, longitude, and GMT differential you specified using the procedure under “To specify a city code to check its sunrise and sunset times” and “To configure longitude, latitude and GMT differential settings”.

2. While the sunrise/sunset time are on the display, use

D (+) and B (–) to scroll through the dates.

• The date (year, month, and day) will appear first, followed by the sunrise and sunset time for that date.

• You can select any date between January 1, 2000 and December 31, 2099.

12:00

11:00

13:00

14:00

Sunset time

15:00

16:00

17:00

18:00

19:00

20:00

21:00

22:00

23:00

1:00

0:00

Current time

22:00

Bearing Mode

Solar azimuth

Important!

Before trying to use this watch to calculate the solar azimuth, make sure to check that the following settings are configured correctly for your current location.

City code and current time settings

Longitude, latitude, and GMT differential The above settings used by this operation are the same as those you configure to calculate sunrise and sunset times. If you have already configured these settings for sunrise/sunset operations, you need only to configure the solar traverse directions here.

• The factory default configuration of the Bearing Mode settings is:

Latitude: North 35 degrees; Longitude: East 140 degrees; GMT Differential: +9 hours; Solar Traverse Direction: South.

• Note that you cannot use the Bearing Mode to determine directions in the following

cases.

When the sun is not visibl At night When sun traverses the sky directly overhead or when you cannot determine if it traverses to the north or south

To set the solar traverse directions

To determine your bearings

1. Enter the Bearing Mode.

• The watch uses the solar traverse directions, along with the watch’s location setup (city code, date, time, longitude, latitude, GMT differential) to calculate and display the current solar azimuth.

2. Find the same value on the bezel as the angle value displayed for the solar azimuth on the Bearing Mode screen.

3. Position the watch so the value you found in step 1 is pointing at the sun.

4. The 12 o’clock position of the watch should now be pointed towards true north.

• Note that the bearings produced by the Bearing Mode are intended for general

reference only.

The Bearing Mode lets you determine approximate directions using a displayed angle value that indicates the angle to the sun (solar azimuth).

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

Bearing Mode, which you enter by pressing C.

1. In the Bearing Mode, hold down A until N or S flashes

on the display. This indicates the setting screen.

2. Press D to toggle the setting between N (north) and S

(south).

3. Press A to exit the setting screen.

• The watch uses the solar traverse directions specified by you, along with the watch’s location setup (city code, date, time, longitude, latitude, GMT differential) to calculate and display the solar azimuth.

Bezel

180

North

Time Recorder

Time recorder graphic

Time record number

Recorded date (Month – Day)

Recorded time (Hour : Minutes Seconds)

• Storing a new time record when there are already 30 records stored in memory automatically deletes record stores the new record as

To recall Time Recorder times

In the Time Recorder Mode, use B (+) and D (–) to scroll through times stored in memory.

• If you recorded a new Time Recorder time since you last entered the Time Recorder Mode, the newest record appears first. If you have not recorded a new time, the record you were viewing when you last exited the Time Recorder Mode appears first.

To delete all Time Recorder times

In the Time Recorder Mode, hold down A to delete all Time Recorder times.

Time Recorder Graphic

In the Time Recorder Mode in the upper right corner of the display indicates hours that has a Time Recorder record.

• A dark segment indicates an hour that has a Time Recorder record.

• Each graphic segment represents one hour.

10:00

9:00

8:00

7:00

6:00

5:00

4:00

3:00

2:00

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 B to 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 through #30.

#01, shifts the remaining records upwards by 1, and

#30.

12:00

11:00

13:00

14:00

15:00

16:00

17:00

18:00

19:00

This hour has a Time

20:00

Recorder record.

1:00

0:00

23:00

22:00

21:00

#01

World Time

City code

Timekeeping Mode time

Current time in the selected city code

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 B to 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

DST indicator

• 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.

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 Ta bl e ”.

• 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 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.

1. In the World Time Mode, use B and D to 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) cannot be turned on and off while GMT is selected as the city code.

Alarms

Alarm number

Timekeeping Mode time

Alarm time (Hour : Minutes)

The Alarm Mode gives you a choice of four one-time alarms and one snooze alarm. Also use the Alarm Mode to turn the Hourly Time Signal (

SIG) on and off.

• There are five alarms numbered and

SNZ. You can configure SNZ as a snooze alarm

only. Alarms time alarms only.

• Alarm settings (and Hourly Time Signal settings) are available in the Alarm Mode, which you enter by pressing C.

AL1 through AL4 can be used as one-

AL1 through AL4,

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