Casio 4378 Operation Manual

MO0603-EA
About This Manual
General Guide
• Press C to change from mode to mode.
• In any mode, press B to illuminate the display.
Timekeeping Mode
Radio-controlled Timekeeping
Hour hand
Minute hand
Day
Day of week 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
City code
• 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.
• 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 city codes and transmitters, see
"Transmitters".
Operation Guide 4378 4379
• 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.
Press C.
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.
1. In the Timekeeping Mode, hold down A until the city
code 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.
2. 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
ATH : Athens
3. Press A to exit 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.
World Time Mode
Hand Setting Mode
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.
Date Screen
Day
Receiving
Press A.
Indicator and
Seconds Count
Current Time
A
Screen
L
Day of week
Press D.
Reception date
2 seconds
Last Signal Screen
2 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 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 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.
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or Inside a Near
among vehicle household
buildings appliances,
office
equipment,
or a mobile
phone
Alarm Mode
Stopwatch Mode
Receiving indicator
Seconds
A
Hour :
Minutes
PM indicator
Reception Time
2 seconds
Near a Near high- Among or
construction tension behind
site, airport, or power lines mountains
other sources
of electrical
noise
1