Casio MO0610-EA User Manual

MO0610-EA

Operation Guide 4756

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 function will not display the correct time for Newfoundland,
Canada.

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 Fort
Collins, Colorado (USA). Reception is possible within North America*.

* The term “Nor th 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.

• 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 Range” for information about the reception range 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 time zones for major cities in
North America.

PT (GMT–8) : Los Angeles, San Francisco, Las Vegas,

MT (GMT–7) : Denver, El Paso, Edmonton, Culiacan
CT (GMT–6) : Chicago, Houston, Dallas/Fort Worth,

ET (GMT–5) : New York, Detroit, Miami, Boston,

• Note that this watch does not have a time zone that
corresponds to Newfoundland.

Seattle/Tacoma, Vancouver, Tijuana

New Orleans, Winnipeg, Mexico City

Montreal

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 four to seven minutes. Take care that

you do not perform any button operations or move the watch during this time.

Reception Range

• 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 Reception 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 0:00 a.m., 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
receive operations are successful.
When any auto receive is successful, the remaining auto receive operations are not
performed.

Inside a
vehicle

600 miles

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

2,000 miles

Fort Collins

▲

Among or
behind
mountains

1

Operation Guide 4756

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 four to
seven minutes everyday when the time in the Timekeeping Mode reaches each of
the calibration times. Avoid performing any button operation within seven 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

Weak

(Level 0)

• 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

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

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

• Your current Home Time Zone

• You changed the time setting

•

•

• The Home Time Zone setting is not

• The home position of the hands is

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

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Result Mode.

setting is not one of the following:
PT, MT, CT or ET.

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.

correct for the area where you are
using the watch.

off.

flash on the display.

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

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while actual reception is in progress.

• The hour and minute hands stop while signal reception

is in progress.

• Time calibration signal reception takes from four to

seven 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 “

xx”.

Enter the Receive Result Mode

•

and try again.

• Select PT, MT, CT or ET 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.

xx”.

What you should doProblem Probable Cause

Strong

(Level 3)

R0 starts to

xx”.

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

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
position adjustment.

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

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(home position).

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• Each press of A advances the second hand by one
second.

• 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 12-hour cycle.

4. Pressing B exits the home position adjustment.

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

Minute hand

Date

Press B.

B

B

Day of week

Time zone

2