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Operation Guide 3309 3345

1

MO0

401

-EA

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to carefully read this manual and keep it on hand for later reference
when necessary.

Expose the watch to bright light to charge its battery before using it.

You can use this watch even as its battery is being charged by exposure to bright
light.

Be sure to read “Battery” of this manual for important information you need to
know when exposing the watch to bright light.

If the digital display of the watch is blank...

If the Power Saving

 

indicator (

PS

) is flashing on the display,

it means that the display is blank because the watch’s
Power Saving function has turned it off to conserve power.
Power Saving automatically turns off the display and
enters a sleep state whenever your watch is left for a
certain period in an area where it is dark. If the watch is
kept in the dark for a longer period, the analog hands will
also stop moving after a few days.

The initial factory default setting is Power Saving on.

The watch will recover from the sleep state if you move it
to a well-lit area or if you press any button.

See “Power Saving Function” for more information.

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.

General Guide

Press 

C

 to change from mode to mode.

In any mode, press 

B

 to illuminate the display.

Battery Level Indicator

Alarm Mode

Stopwatch Mode

Timekeeping Mode

Press 

C

.

World Time  Mode

Hand Setting Mode

or

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 from Rugby, England and the signal
from Mainflingen, Germany.

Day

Day of week

Minute hand

Hour hand

Second hand

Current Time Setting

This watch automatically adjusts its time setting 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 set your Home City,
which is the city where you will normally use the watch. For more information, see
“To set your Home City” below.

When using the watch in an area that is outside of the range of the transmitters in
Rugby and Mainflingen, you need to manually adjust the time as required. See
“Timekeeping” for information about manual settings.

The analog time of this watch is synchronized with the digital time. Because of this,
the analog time setting is automatically adjusted whenever you change the digital
setting. See “Analog Timekeeping” for more information.

To set your Home City

1. In the Timekeeping Mode, hold down 

A

 until the

transmitter indicator (

AT

DCF

M

SF

) starts to flash,

which indicates the setting screen.

If the displayed transmitter indicator shows something
other than 

AT

, use 

D

 to display 

AT

 before

advancing to the next step.

The second hand will move at high speed to the 12
o’clock position, where it will stop.

2. Press 

C

 to display the city code setting screen.

3. Use 

D

 (east) and 

B

 (west) to select the city code you

want to use as your Home City.

The following are the city codes for major cities in the
Western Europe time zones.

LON

: London

PAR

 and 

BER

: Paris, Berlin, Milan, Rome,

Amsterdam, Hamburg, Frankfurt,
Vienna

4. Press 

A

 twice to exit the setting screen.

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Transmitter indicator

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City code

The first press of 

A

 displays the 12/24-hour setting screen. Pressing 

A

 again exits

the setting screen.

The second hand will advance at high speed to the correct position in accordance
with seconds count of the digital time, and resume normal movement from there.

Normally, your watch should show the correct time as soon as you select your Home
City Code. If it does not, it should adjust automatically after the next auto receive (in
the middle of the night). You can also perform manual receive or you can set the time
manually.

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

See “Transmitters” for details about the transmitter indicator.

To display the digital time and last signal screen

In the Timekeeping Mode, press 

A

 to cycle through the digital time screens as

shown below.

In the Timekeeping Mode, press 

D

 to display the last signal screen. The last signal

screen shows the date and time of the last successful time calibration signal
reception.

Last Signal Screen

Reception date

Day of week

Press 

A

.

Day

Receiving
indicator

A

2 seconds

2 seconds

2 seconds

A

Press 

D

.

Hour :
Minutes

Reception Time

PM indicator

Date Screen

Receiving
Indicator and
Seconds Count

Current Time
Screen

Seconds

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 automatically picks up the time calibration signal five
times a day at 0:00 a.m., 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. For more
information, see “About Auto Receive”.

Manual Receive

Manual receive lets you start time calibration signal reception 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 12 o’clock side facing towards a window.
Make sure there are no metal objects nearby.

Resin Band

Metal Band

The watch should not be on its side or facing the wrong way.

Summary of Contents for 3309

Page 1: ...h the digital time Because of this the analog time setting is automatically adjusted whenever you change the digital setting See Analog Timekeeping for more information To set your Home City 1 In the Timekeeping Mode hold down A until the transmitter indicator AT DCF MSF starts to flash which indicates the setting screen If the displayed transmitter indicator shows something other than AT use D to...

Page 2: ...utes Take care that you do not perform any button operations or move the watch during this time After signal reception is complete the display of the watch changes to the last signal screen Note To interrupt a reception and return to the Timekeeping Mode press D If the reception is unsuccessful the message ERR appears on the display for about one or two minutes After that the watch returns to the ...

Page 3: ...ote that charging efficiency drops when any part of the solar cell is blocked by clothing etc Normally you should try to keep the watch outside of your sleeve as much as possible Charging is significantly reduced if the face is only partially covered Solar cell Important Storing the watch for long periods in an area where there is no light or wearing it in such a way that it is blocked from exposu...

Page 4: ...ode Table for a complete list of available city codes Screen To do this Toggle between 12 hour and 24 hour timekeeping Reset the seconds to Toggle the illumination duration setting between 1 5 second and 2 5 seconds Change the hour or minutes Change the year Change the month or day Toggle Power Saving on ON and off OF Do this Press D Press D Press B Use D and B Use D and B Use D and B Press D Time...

Page 5: ... data on the display In most cases holding down these buttons during a scroll operation scrolls through the data at high speed Initial Screens When you enter the World Time or Alarm Mode the data you were viewing when you last exited the mode appears first Radio controlled Timekeeping Precautions Strong electrostatic charge can result in the wrong time being set Even when the watch is within the r...

Page 6: ...tained 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 12 hour 24 hour Timekeeping Formats The 12 hour 24 hour timekeeping format you select in the Timekeeping Mode is also applied in all other modes With the 12 hour format the P PM ...

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