Casio 2506 User Manual

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. After you perform an operation in any
mode, pressing C returns to the Timekeeping Mode.
• In any mode, press L to illuminate the display for about two seconds.
Timekeeping Mode
Press C.
Timekeeping
Use the Timekeeping Mode to set and view the current time and date. You can also
display the Last Signal and World Time screens.
Last Signal Timekeeping
Receive indicator
Receive date
Day of week
Press D.
Hour : Minutes
Receive time
PM indicator Seconds
• The Last Signal screen shows the time and date of the last successful time
calibration signal reception.
• The World Time screen shows the data you were viewing when you last exited the
World Time Mode.
Current Time Setting
Normally, you do not need to do anything to set the current time as long as you are
within an area in West Europe where the watch can pick up the time calibration signal.
You can also set the current time manually when you are outside the range of the
signal.
• Before using the watch after purchasing it, use the procedure under "Selecting Your
Home City Code" to specify your home city, and then use the procedure under "To
perform manual time calibration signal reception."
• Note that after you set your Home City code, you must also turn on the watch's time
calibration signal receiver if you want to enable auto time calibration. See "About
Auto Receive" for more information.
• See "Setting the Time and Date Manually" for information about manual settings.
Setting the Time and Date Manually
The times displayed in the Timekeeping Mode and World Time Mode are linked. Even
if you plan to use the watch without enabling auto time calibration, be sure to select a
Home City code (the city code whose time and date you are setting), before you set
the time and date.
To set the current time and date manually
1. In the Timekeeping Mode, hold down A until the
12-hour format indicator
current Auto Receive On/Off setting starts to flash,
City code
which indicates the setting screen.
2. Press C to move the flashing in the sequence shown
below to select other settings.
Auto 12/24-Hour
DST
Receive Format
Day Month Year
3. When the setting you want to change is flashing, use B and/or D to change it as
described below.
Setting
Press D to toggle auto receive on and off.
Auto Receive
Press D to toggle between Daylight Saving TIme (ON) and
DST
standard time (OFF).
Press D to toggle between 12-hour (12H) and 24-hour (24H)
12/24-Hour format
timekeeping.
Use D (+) and B (–) to change the setting.
City Code
Press D to reset to 00.
Seconds
Use D (+) and B (–) to change the setting.
Hour, Minutes,
Year, Month, Day
• Auto Receive setting is used for time calibration signal reception only. See "About
Auto Receive" for details.
• See "City Code Table" for a complete list of available codes.
• Daylight Saving Time (DST) advances the time setting by one hour from Standard
Time. Remember that no all countries or even local areas use Daylight Saving
Time.
4. Press A to exit the setting screen.
USER'S GUIDE 2506
Alarm Mode
World Time
Timekeeping Mode time
Month – Day
City code
Hold down B.
Release
Current time in the
selected city code
City Code Seconds
Minutes Hour
Button Operations
Day Counter Mode
Stopwatch Mode
Selecting Your Home City Code
You can select a city code for your Home City (the city where you normally use the
watch). This data can be changed any time you move to another geographic area.
• See "City Code Table" for a complete list of available codes.
To select your Home City code
1. In the Timekeeping Mode, hold down A until the
City code
current Auto Receive On/Off setting starts to flash,
which indicates the setting screen.
2. Press C three times to move the flashing to the City
Code setting.
3. Use D (+) and B (–) to change it.
4. Press A to exit the setting screen.
Time Calibration Signal Reception
This watch is designed to pick up a time calibration signal transmitted from
Mainflingen, Germany and update its time setting in accordance with the signal. There
are two different methods you can use to receive the signal: Auto Receive and
Manual Receive. With Auto Receive, the watch automatically receives the calibration
signal three times each day and makes appropriate adjustments. With Manual
Receive, you perform a specific button operation to receive the calibration signal.
Note
• If you are using the time calibration signal to set the time for this watch, be sure to
correctly set your home city. Otherwise, there is the chance that the watch will not
set the correct time. See the "To select your Home City code" for details.
• This watch automatically switches between DST and standard time while BER is
selected as the home city code. For any other home city code, you must perform the
procedure under "To set the current time and date manually" to switch between DST
and standard time.
• Time calibration reception is limited to specific geographic areas in West Europe.
• The current time setting in accordance with the time calibration signal takes priority
over any time settings you make.
• The watch is designed to automatically update the date and day of the week for the
period January 1, 2000 to December 31, 2039. Setting of the date by the time
calibration signal cannot be performed starting from January 1, 2040.
• This watch can receive signals that differentiate between leap years and non-leap years.
• Auto Receive is turned on when the watch is shipped from the factory.
• See the information under "Time Calibration Signal Reception Precautions"
if you experience problems with time calibration signal reception.
To perform manual time calibration signal reception
1. Place the watch on a stable surface to its top (12
o'clock side) is facing in the general direction of
Frankfurt, Germany.
• This puts the watch in the optimum position for time
calibration signal reception.
2. In the Timekeeping Mode, hold down D for about two
seconds, until the watch beeps.
• At this time, the
Current time
should scroll from left to right, which indicates that
Receive indicator
signal reception has started.
• Time calibration signal reception takes from four to 11
minutes. Take care that you do not move the watch
during this time.
• After signal reception is complete, the display of the
watch changes to the Last Signal screen, which
shows the new signal receive date and time.
Note
• To interrupt a receive operation and return to the Timekeeping screen, press D.
• If the receive operation is unsuccessful, the message "ERR" appears on the Last
Signal screen for about one or two minutes. After that, the watch returns to the
Timekeeping screen.
• You can also change from the Last Signal screen to the Timekeeping screen by
pressing D.
About the Receive Indicator
The receive indicator shows the strength of the calibration signal being received. For
best reception, be sure to keep the watch in a location where signal strength is
strongest.
Weak
• Even in an area where signal strength is strong, it takes about 10 seconds for signal
reception to stabilize enough for the receive indicator to indicate signal strength.
World Time Mode
Telememo Mode
indicator on the watch's display
Strong
1