Casio MO0611-EA, 4757 User Manual

MO0611-EA

Operation Guide 4757

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.

General Guide

• Press C to change from mode to mode.

• In any mode (except when a setting screen is on the display), press A to illuminate

the face of the watch.

If all the analog hands are stopped at 12 o’clock...

To conserve battery power, the watch is shipped from the
factory with its functions disabled. All the watch’s analog
hands are stopped at 12 o’clock, and the digital display
alternates between the hour and minute. To activate the
watch’s functions, press any one of the three buttons. This
will cause the analog hands to move to the current time
setting.

About This Manual

Minute hand

Hour hand

Second hand

• Most of the display examples in this manual show only
the digital display, without the analog hands.

• 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.

Receive Result Mode

▲

Timekeeping Mode

Press C.

▲

Radio-controlled Atomic Timekeeping

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
Mainflingen, Germany and the signal from Rugby, England.

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.

• The first thing you should do after purchasing this watch is to specify your Home
Time Zone, which is the time zone where you will normally use the watch. For more
information, see “To specify your Home Time Zone” below.

• When using the watch outside the range of the time signal transmitter, you will have
to adjust the current time setting manually as required. See “Timekeeping” for more
information about manual time settings.

To specify your Home Time Zone

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Time zone

3. Press B to exit the setting screen.

• The watch will also return to the Timekeeping Mode if you do not perform any
operation for two or three minutes.

• Your watch should show the correct time when you exit the Home Time Zone setting
screen. While the hands are moving to the new time setting, the current time will be
shown on the digital display. 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.

• Even if the time calibration signal is received correctly, there are some times when
the analog hands may not indicate the correct time. If this happens, use the
procedures under “Adjusting the Home Positions” to check the home positions of the
hands, and make adjustments as required.

• See the map under “Reception Ranges” for information about the reception ranges
of the watch.

• You can disable time signal reception, if you want. See “To set the time and date
manually” for more information.

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 receives the time calibration signal automatically up to six
times a day. When any auto receive is successful, the remaining auto receive
operations are not performed. 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”.

1. In the Timekeeping Mode, hold down B for about five

seconds until the currently selected time zone appears

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on the display. This is the setting screen.

• The GMT differential value indicates the time

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difference in hours between Greenwich Mean Time
and the currently selected time zone.

2. Press A to select the time zone you want to use as

your Home Time Zone.

• The following are the GMT differential values for major
cities in the Western Europe time zones.

Time Zone

+0

+1

+2

Major cities in time zone

London, Dublin, Lisbon
Paris, Milan, Rome, Madrid,Amsterdam,

Hamburg, Berlin, Frankfurt, Vienna,
Stockholm

Athens, Helsinki

Home Position

Adjustment Mode

▲

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.

• 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

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

• Time calibration signal reception takes from two to seven minutes, but in some

cases it can take as long as 14 minutes. Take care that you do not perform any
button operations or move the watch during this time.

• When within range of the applicable transmitter, this watch can receive either the
Germany (Mainflingen) or England (Rugby) time calibration signals.
See “Transmitters” for more information.

Reception Ranges

• At distances further than about 500 kilometers from a transmitter, signal reception
may not be possible during certain times of year or times of day. Radio interference
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 Reception Troubleshooting” if you experience
problems with time calibration signal reception.

Inside a
vehicle

1,500 kilometers

Rugby

500 kilometers

Near
household
appliances or
office
equipment,
or a mobile
phone

Alarm Mode

12 o’clock

or

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

Near high­tension
power lines

Mainflingen

▲

Among or
behind
mountains

1

Operation Guide 4757

About Auto Receive

The watch receives the time calibration signal automatically up to six times a day.
When any auto receive is successful, the remaining auto receive operations are not
performed. The reception schedule (calibration times) depends on your currently
selected Home Time Zone, and whether Standard Time or Daylight Saving Time is
selected for your Time Zone.

Note

Auto receive is turned on whenever +0, +1, or +2 is selected as the Home Time Zone.

•

Your Time Zone

Standard Time

+ 0

Daylight Saving
Time

Standard Time

+ 1

Daylight Saving
Time

Standard Time

+ 2

Daylight Saving
Time

Note

• Auto receive works only while the watch is in the Timekeeping Mode. Auto receive is
not performed if an auto receive time is reached while an alarm is sounding, or if a
setting screen (a screen with a flashing setting) is 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
14 minutes everyday when the time in the Timekeeping Mode reaches each of the
calibration times. Avoid performing any button operation within 14 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 current time 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 displayed
time actually is the correct time.

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. The receiving indicator is displayed while an auto or manual receive
operation is in progress.

Receiving indicator

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

To perform manual receive

Receiving

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Receive successful

Receive failed

Note

• To interrupt a receive operation and return to the Receive Result Mode, press any
button.

Viewing the Latest Signal Reception Results

You can use the Receive Result Mode to check if signal reception was performed
correctly.

To check the latest signal reception results

1:00 am 2:00 am 3:00 am 4:00 am 5:00 am Midnight

2:00 am 3:00 am 4:00 am 5:00 am Midnight 1:00 am

2:00 am 3:00 am 4:00 am 5:00 am Midnight 1:00 am

3:00 am 4:00 am 5:00 am Midnight 1:00 am 2:00 am

3:00 am 4:00 am 5:00 am

4:00 am 5:00 am

Weak

(Level 0)

1. Enter the Receive Result Mode.

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

3. Hold down B for about two seconds until
flash on the display.

• The second hand will move to 12 o’clock and stay there

while actual reception is in progress.

• The hour and minute hands stop while signal reception

is in progress.

• Time calibration signal reception takes from two to 14

minutes. Take care that you do not perform any button
operations or move the watch during this time.

• After successful calibration signal reception is complete,

the hands will start moving to the correct setting. While
they are moving, the current time will be shown on the
digital display. After the hands reach the correct setting,
the digital display will switch to the time that signal
reception was successful.
The watch will enter the Timekeeping Mode if you press
C or if you do not perform any button operation for one
or two minutes.

• When receive is unsuccessful, the display shows “

The watch will enter the Timekeeping Mode without
changing the time setting if you press C or if you do not
perform any button operation for about one or two
minutes.

Enter the Receive Result Mode.

• When receive is successful, the display shows the time

that receive was successful. When receive is not
successful, the display shows “

• To return to the Timekeeping Mode, press C.

• If you adjust the time or date setting manually, the

display shows “

Auto Receive Start Times

1234 5 6

next day

next day

next day next day

Midnight

1:00 am 2:00 am
next day next day

Midnight

1:00 am 2:00 am 3:00 am
next day next day next day

Strong

(Level 3)

R0 starts to

xx”.

xx”.

xx”.

Signal Reception Troubleshooting

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

Cannot
perform
manual
receive.

Auto receive
is not being
performed
successfully
(“

xx”

displayed).

Time setting
is incorrect
following
signal
reception.

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

• The watch is not in the Receive
Result Mode.

• Your current Home Time Zone
setting is not one of the following:
+0, +1 or +2.

• You changed the time setting
manually.

• You were adjusting the watch
settings when the auto receive start
times were reached.

• You pressed any button while signal
receive was in progress.

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

• The home position of the hands is
off.

What you should doProblem Probable Cause

• Enter the Receive Result
Mode and try again.

• Select +0, +1 or +2 as your
Home Time Zone.

• 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.

• Select the correct Home
Time Zone.

• Enter the Home Position
Adjustment Mode and adjust
the home position.

Alarm

When the alarm is turned on, the alarm sounds when the alarm time is reached. You
can also turn on an Hourly Time Signal, which will cause the watch to beep twice
every hour on the hour.

• All of the operations in this section are performed in the Alarm Mode, which you

enter by pressing C.

Alarm on
indicator

To set the alarm time

1. In the Alarm Mode, hold down B until the hour setting of the alarm time starts to

flash, which indicates the setting screen.

• This operation automatically turns on the alarm.

2. Press C to move the flashing between the hour and minute settings.

3. While a setting is flashing, use A (+) to change it.

• Take care to set the time correctly as a.m. (

4. Press B to exit the setting screen.

Alarm Operation

The alarm sounds at the preset time for about 10 seconds, regardless of the mode the
watch is in.

• To stop the alarm tone after it starts to sound, press any button.

To test the alarm

1. In the Alarm Mode, hold down B until the hour setting of the alarm time starts to

flash, which indicates the setting screen.

• This operation automatically turns on the alarm.

2. Hold down C to sound the alarm.

3. Press B to exit the setting screen.

To turn the Daily alarm and the Hourly Time Signal on and off

In the Alarm Mode, press B to cycle through the settings shown below.

Hourly time signal
on indicator

Alarm time
(Hour)

Alarm time
(Minutes)

indicator) or p.m. ( indicator).

Alarm On Indicator / Hourly Time Signal On Indicator

Signal Off
Alarm Off

• The alarm on indicator and the Hourly Time Signal on indicator are shown on the
display in all modes while these functions are turned on.

Signal Off
Alarm On

Signal On
Alarm Off

Signal On
Alarm On

Adjusting the Home Positions

If the time and date settings are wrong even after the time calibration signal is
received normally, use the following procedure to adjust their home positions.

To adjust the home positions

12 o’clock

Correct analog hand
home position

• Holding down A for more than two seconds causes the second hand to move
continually at high speed. Press A again to stop high-speed hand movement at a
point that is just before 12 o’clock. Next, complete home position adjustment by
pressing A as many times as necessary to align the hands with 12 o’clock.

• High-speed hand movement will stop automatically if the hands complete a 12­hour cycle.

4. Pressing B exits the home position adjustment.

1. In the Timekeeping Mode, press C three times to enter

the Home Position Adjustment Mode.

2. Hold down B for about five seconds.

• The analog hands do not keep time during home

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position adjustment.

3. Use A to align all of the analog hands with 12 o’clock

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(home position).

• Each press of A advances the second hand by one

second.

2

Operation Guide 4757

Timekeeping

Use the Timekeeping Mode to set and view the current time and date. This section
also explains how to set the current date and time manually.

• If you become confused and lose your way during the following procedures, simply
put the watch down and do not perform any button operation for two or three
minutes. This will cause the watch to enter the Timekeeping Mode (indicated by
normal one-second movement of the second hand) automatically. After that, you can
try performing the manual setting procedure again from the beginning.

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

Hour hand

Second hand

To set the time and date manually

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Auto Receive

3. Select the setting you want to change, and then use A to change it as shown

below.

Screen Do this:

Change the day

Toggle signal auto receive on ( ) and off ( )
(This setting is possible only for time zones that support

time calibration signal reception.)

• For full information on time zones, see the “Time Zone Table”.

• When setting the day, the watch automatically will skip days (30 and 31) that are

not included in the currently selected month. If you can’t select 30 or 31 when you
want to, check to make sure that the proper month is selected.

4. Press B to exit the setting screen.

•

This will cause the hands to move to the current time, and resume normal movement.

•

The current time will be shown on the digital display while the hands are moving.

•

It can take as long as about 11 minutes for the hands to reach the proper time
setting.

Note

• The auto receive setting is used for time calibration signal reception only. See “About
Auto Receive” for details.

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.
The time calibration signals include both Standard Time and DST data. When the Auto
DST setting is turned on, the watch switches between Standard Time and DST
(summer time) automatically in accordance with the signals.

• The default DST setting is Auto DST (
Home Time Zone.

• Auto DST (
Time Zone.

• If you experience problems receiving the time calibration signal in your area, it is
probably best to switch between Standard Time and Daylight Saving Time (summer
time) manually.

To change the Daylight Saving Time (summer time) setting

1. In the Timekeeping Mode, hold down B until the currently selected time zone

appears on the display. This is the setting screen.

2. Press C and the DST setting screen appears.

3. Use A to cycle through the DST settings in the sequence shown below.

1. In the Timekeeping Mode, hold down B until the Time

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To do this:

Cycle through time zones
Toggle between Auto DST (

Daylight Saving Time ( )
Reset the seconds to
Change the hour
Change the minutes
Change the year

Change the month

Zone starts to flash, which indicates the setting screen.

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• The analog hands do not move in the setting screen.

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2. Press C to cycle through settings in the sequence shown

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below.

Time zone

) can be selected only while +0, +1 or +2 is selected as the Home

Press C.

Minute hand

Date

Press B.

B

DST

MonthDay

), Standard Time ( ), or

) whenever you select +0, +1 or +2 as your

B

Seconds

Day of week

Time zone

Year

Hour

Press A.
Press A.

Press A.
Press A.
Press A.
Press A.

Press A.

Press A.

Press A.

Minutes

Reference

This section contains more detailed and technical information about watch operation. It
also contains important precautions and notes about the various features and functions
of this watch.

Auto Return Features

• The watch automatically returns to the Timekeeping Mode if you do not perform any
button operation for one or two minutes while in the Receive Result Mode.

• The watch automatically returns to the Timekeeping Mode if you do not perform any
button operation for two or three minutes while in the Alarm or Home Position Adjustment
Mode.

• If you do not perform any operation for two or three minutes while a setting screen is
selected, the watch will exit the setting screen automatically.

Scrolling

A is used in various modes and setting screens to scroll through data. In most cases,
holding down A during a scroll operation scrolls through the data at high speed.

Radio-controlled Atomic Timekeeping Precautions

• Strong electrostatic charge can result in the wrong time being set.

• The time calibration signal is bounced off the ionosphere. Because of this, such factors

as changes in the reflectivity of the ionosphere, as well as movement of the ionosphere
to higher altitudes due to seasonal atmospheric changes or the time of day may change
the reception range of the signal and make reception temporarily impossible.

• Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.

• The current time setting in accordance with the time calibration signal takes priority
over any time settings you make.

• The watch is designed to update the date and day of the week automatically for the
period January 1, 2000 to December 31, 2099. Setting of the date by a time calibration
signal cannot be performed starting from January 1, 2100.

• This watch can receive signals that differentiate between leap years and non-leap
years.

• Though this watch is designed to receive both time data (hour, minutes, seconds) and
date data (year, month, day), certain signal conditions can limit reception to time data
only.

• If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time within ±20 seconds a month at normal temperature.

• If you have problems with proper time calibration signal reception or if the time setting
is wrong after signal reception, check your current time zone, DST (summer time), and
auto receive settings. The following are the initial factory defaults for these settings.

Setting Initial Factory Default

Time zone
DST (summer time)
Auto receive

Transmitters

This watch is designed to receive the time calibration signal transmitted from
Mainflingen, Germany and the signal from Rugby, England. You can configure the
watch to automatically select the transmitter that has the strongest signal.

In this case:

The first signal auto search operation
after factory default settings are in effect,
or after the time zone has been changed

Any case other than the above

Timekeeping

• Resetting the seconds to 00 while the current count is in the range of 30 to 59 causes
the minutes to be increased by 1. In the range of 00 to 29, the seconds are reset to 00
without changing the minutes.

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

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

and leap years. Once you set the date, there should be no reason to change it except
after you have the watch’s battery replaced.

• The current time for all time zones in the Timekeeping Mode is calculated in accordance
with the Greenwich Mean Time (GMT) differential of each zone, based on your Home
Time Zone time setting.

• GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC*) data.

* UTC is the world-wide scientific standard of timekeeping. It is based upon carefully

maintained atomic (cesium) clocks that keep time accurately to within microseconds.
Leap seconds are added or subtracted as necessary to keep UTC in sync with the
Earth’s rotation. The reference point for UTC is Greenwich, England.

Illumination Precautions

An LED (light-emitting diode) illuminates the face of the watch for easy reading in the
dark. In any mode (except when a setting screen is on the display), press A to illuminate
the face of the watch for about one second.

• The illumination provided by the light may be hard to see when viewed under direct
sunlight.

• Illumination automatically turns off whenever an alarm sounds.

• Frequent use of illumination can shorten the battery operating time.

(GMT+1)
(Auto switching)
(Auto receive)

The watch does this:

1. Checks the Mainflingen signal first.

2. If the Mainflingen signal cannot be
received, checks the Rugby signal.

1. Checks the last successfully received
signal first.

2. If the last successfully received signal
cannot be received, checks the other
signal.

Auto DST ( ) DST on (

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

)

)DST off (

3

Time Zone Table

Display GMT

Indicator

• Based on data as of June 2006.

Differential

–11.0

Pago Pago

–10.0

Honolulu, Papeete

–09.0

Anchorage, Nome
Los Angeles, San Francisco, Las Vegas, Vancouver, Seattle/Tacoma,

–08.0

Dawson City

–07.0

Denver, El Paso, Edmonton
Chicago, Houston, Dallas/Fort Worth, New Orleans, Mexico City,

–06.0

Winnipeg
New York, Montreal, Detroit, Miami, Boston, Panama City, Havana,

–05.0

Lima, Bogota

–04.0

Caracas, La Paz, Santiago, Port Of Spain

–03.0

Rio De Janeiro, Sao Paulo, Buenos Aires, Brasilia, Montevideo

–02.0
–01.0

Praia

+00.0

London, Dublin, Lisbon, Casablanca, Dakar, Abidjan
Paris, Milan, Rome, Madrid, Amsterdam, Algiers, Hamburg, Berlin

+01.0

Frankfurt, Vienna, Stockholm
Cairo, Jerusalem, Helsinki, Istanbul, Beirut, Damascus, Cape Town,

+02.0

Athens

+03.0

Jeddah, Kuwait, Riyadh, Aden, Addis Ababa, Nairobi, Moscow

+04.0

Dubai, Abu Dhabi, Muscat

+05.0

Karachi, Male

+06.0

Dhaka

+07.0

Bangkok, Jakarta, Phnom Penh, Hanoi, Vientiane
Hong Kong, Singapore, Kuala Lumpur, Beijing, Taipei, Manila, Perth,

+08.0

Ulaanbaatar

+09.0

Tokyo, Seoul, Pyongyang

+10.0

Sydney, Melbourne, Guam, Rabaul

+11.0

Noumea, Port Vila

+12.0

Wellington, Christchurch, Nadi, Nauru Island

Operation Guide 4757

Major cities in time zone

,

4