Casio Operation Guide 4722 User Manual

Operation guide 4722, Getting acquainted, General guide

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Operation Guide 4722




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.

Starting second hand movement and digital display

To conserve battery power, the watch is shipped from the
factory with its functions disabled. Pressing any one of the
watch’s three buttons will activate its functions, which will
cause the second hand to start moving and the digital
display to activate.








Your watch switches automatically between Standard Time and Daylight
Saving Time (summer time).
Note, however, that switching cannot be performed correctly if the watch is
not able to receive the time calibration signal.
If you notice that the current time is not displayed properly, use the
procedure under “To perform manual receive” or “To set the time and date
manually” to correct it.

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

About This Manual

• 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.








Hour hand

Minute hand



24-Hour hand

minute hand

Stopwatch 1/20 second hand

Hand Setting Mode

Alarm Mode

Dual Time Mode

General Guide

• Press C to change from mode to mode.

• About 1.5 seconds after you enter the Dual Time Mode, Alarm Mode, or Hand Setting Mode

the hands will move the position that indicates the current setting of the mode. You cannot
change to another mode while the hands are moving. To change to another mode, either
press C before the hands start to move, or wait until the hands stop before pressing C.

• In Timekeeping mode (except when a setting screen is on the display), press B to

illuminate the face of the watch.








Timekeeping Mode

Press C.

Stopwatch Mode

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 in the United

States (Fort Collins, Colorado) and the time calibration signals transmitted in Japan.

• The U.S. time calibration signal can be picked up by the watch while in North

* The term “North America” in this manual 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

• 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 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

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

differential value starts to flash, which indicates the
setting screen.

• The second hand will move at high speed to the 12

o’clock position, where it will stop.

• The GMT differential value indicates the time

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

• The DST indicator indicates that Daylight Saving Time

(summer time) is turned on for the currently selected
time zone.

l l l l l







l l

l l

DST indicator

GMT differential

Minus sign

2. Use B (+) to select the time zone you want to use as your Home Time Zone.

–5.0 (DST –4.0): New York, Miami, Toronto, Montreal, Detroit, Boston,

Panama City, Havana, Lima, Bogota

–6.0 (DST –5.0): Chicago, Mexico City, Winnipeg, Houston, Dallas/Fort Worth,

New Orleans

–7.0 (DST –6.0): Denver, Edmonton, El Paso
–8.0 (DST –7.0): Los Angeles, Vancouver, San Francisco, Las Vegas,

Seattle/Tacoma, Dawson City

–9.0 (DST –8.0): Anchorage, Nome
–10.0 (DST –9.0): Honolulu, Papeete
+8.0 (DST +9.0): Hong Kong, Singapore, Kuala Lumpur, Beijing, Taipei, Manila,

Perth, Ulaanbaatar

+9.0 (DST +10.0): Tokyo , Seoul, Pyongyang

3. Press A to exit the setting screen.

• The second hand will advance at high speed to the correct position and resume

normal movement from there.

• Normally, your watch should show the correct time as soon as you specify your

Home Time Zone. 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.

• Selecting –5.0, –6.0, –7.0, –8.0, –9.0, –10.0, +8.0, or +9.0 ( –4.0, –5.0, –6.0, –7.0,

–8.0, –9.0, +9.0, or +10.0 while DST is turned on) as your Home Time Zone
automatically turns on auto receive. When auto receive is turned on and you are within
the reception range, the watch will automatically receive the time calibration signal
from the applicable transmitter (in the middle of the night) and update its settings
accordingly. For information about the relationship between time zones (GMT
differential values) and transmitters, see “Home Time Zones and Transmitters”.

• See the maps under “Reception Ranges” for information about the reception ranges

of the watch.

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

the DST setting.

• 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.

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”.


• 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


Inside or

Inside a

Near a
site, airport, or
other sources
of electrical

Near high-
power lines

Among or

or a mobile