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Operation Guide 4304 4305
1
MO0508-EB
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 and keep it on hand for later reference
when necessary.
Before using the watch for the first time...
Some watches are sent from the factory with timekeeping
stopped, and the second hand at 12 o’clock. Press the A
button to start the second hand.
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
Date
Second hand
General Guide
• This watch is designed so the function of a button is executed when you release the
button, not when you press it.
• Use A and B to change from mode to mode as shown below.
Press B.
Timekeeping Mode (Day) Timekeeping Mode
(Day of week)
Receive Result ModeTimekeeping Mode
▲
▲
▲
▲
Press A.
Radio-controlled 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 Germany
(Mainflingen), England (Rugby), the United States (Fort Collins) and the time
calibration signals transmitted in Japan.
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 transmitters, you will have
to adjust the current time setting manually as required. See “Timekeeping” for more
information about manual time settings.
• The U.S. time calibration signal can be picked up by the watch while in North
America.
*The term “North America” in this manual refers to the area that consists of
Canada, the continental United States, and Mexico.
To specify your Home Time Zone
1.In the Timekeeping Mode, hold down B for about five
seconds until the currently selected Time Zone appears
on the display. This is the setting mode.
• The GMT differential value indicates the time
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.
0 (GMT
0) : London
+1 (GMT+ 1) :
Paris, Berlin, Milan, Rome, Amsterdam
,
Hamburg, Frankfurt, Vienna, Barcelona, Madrid
+2 (GMT+ 2): Athens
+9 (GMT+ 9): All cities in Japan
Time Zone
E (GMT–5): New York, Detroit, Miami, Boston, Montreal
C (GMT–6):
Chicago, Houston, Dallas/Fort Worth, New Orleans, Winnipeg,
Mexico City
M (GMT–7): Denver, El Paso, Edmonton, Culiacan
P (GMT–8): Los Angeles, San Francisco, Las Vegas, Seattle/Tacoma, Vancouver,
Tijuana
3. Press B ten times to exit the setting mode.
• The watch will also return to the Timekeeping Mode if you do not perform any
operation for about three minutes.
• Normally, your watch should show the correct time as soon as you exit the Home
Time Zone setting screen. 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.
• The watch will receive the time calibration signal automatically 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 “Transmitters”.
• See the maps under “Reception Ranges” for information about the reception ranges
of the watch.
• Yo u 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
five 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”.
Important!
• When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, with its 6 o’clock side facing towards a window.
Make sure there are no metal objects nearby.
6 o’clock
• The watch should not be facing the wrong way.
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or
among
buildings
Inside a
vehicle
Near a
construction
site, airport, or
other sources
of electrical
noise
Near high-
tension
power lines
Among or
behind
mountains
Near
household
appliances,
office
equipment,
or a mobile
phone
• 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 ten minutes. Take care that you do not perform any
button operations or move the watch during this time.
• The time calibration signal the watch will attempt to pick up depends on its current
Home City code setting as shown below.
Home City Code
GMT 0
GMT+1, GMT+2
GMT+ 9
E(GMT–5), C(GMT–6),
M(GMT–7), P(GMT–8)
Frequency
60.0 kHz
77.5 kHz
40.0 kHz
60.0 kHz
60.0 kHz
Transmitter
Rugby (England)
Mainflingen (Germany)
Fukushima (Japan)
Fukuoka/Saga (Japan)
Fort Collins, Colorado
(the United States)
Reception Ranges
Rugby
Mainflingen
1,500 kilometers
500 kilometers
Fort Collins
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
1,000
kilometers
1,000
kilometers
Fukuoka/Saga
500
kilometers
Fukushima
500
kilometers
• Under good reception conditions, signal reception is possible within a radius of about
1,500 kilometers (930 miles) from the Mainflingen (Germany) or Rugby (England)
transmitter.
• At distances further than about 500 kilometers (310 miles) from the Mainflingen
(Germany) or Rugby (England) transmitter, signal reception may not be possible
during certain times of year or times of day. Radio interferance may also cause
problems with reception.