Manual Casio 4305 (page 1 of 4) (English)

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Operation Guide 4304 4305

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

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.

My Casio Wave Ceptor 4305 is still reading British Summer Time. How do I adjust this? Submitted on 1-11-2022 at 18:58
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