Casio 2506 Owner's Manual
USER’S GUIDE 2506
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.
Alarm Mode
▲
▲
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 World Time
Receive date
Press D.
Receive time
• 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
12-hour format indicator
City code
Auto
Receive
Day
3. When the setting you want to change is flashing, use B and/or D to change it as
described below.
Setting
Auto Receive
DST
12/24-Hour format
City Code
Seconds
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.
Receive indicator
Day of week
▲
▲
Hour : Minutes
PM indicator Seconds
1. In the Timekeeping Mode, hold down A until the
current Auto Receive On/Off setting starts to flash,
which indicates the setting screen.
2. Press C to move the flashing in the sequence shown
below to select other settings.
12/24-Hour
Format
Month Year
Press D to toggle auto receive on and off.
Press D to toggle between Daylight Saving TIme (ON) and
standard time (OFF).
Press D to toggle between 12-hour (12H) and 24-hour (24H)
timekeeping.
Use D (+) and B (–) to change the setting.
Press D to reset to 00.
Use D (+) and B (–) to change the setting.
Month – Day
Button Operations
Hold down B.
▲
Release
City Code
Minutes
Timekeeping Mode time
City code
Current time in the
selected city code
SecondsDST
Hour
Day Counter Mode
▲
World Time Mode
▲
▲
Stopwatch Mode
Telememo 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
City code
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
Current time
Receive indicator
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.
• 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.
1. In the Timekeeping Mode, hold down A until the
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.
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
should scroll from left to right, which indicates that
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.
Weak Strong
indicator on the watch’s display
1
USER’S GUIDE 2506
• Use the receive indicator as a guide for checking signal strength and for finding the
best location for the watch during signal receive operations.
• The receive indicator remains on the display in all modes following reception of the
time calibration signal and calibration of the watch’s time setting. The receive
indicator does not appear if signal reception was unsuccessful or after manual
adjustment of the current time setting.
About Auto Receive
When auto receive is turned on, the watch automatically starts to receive the time
calibration signal when the digital time in the Timekeeping Mode reaches 2:00 AM,
4:00 AM, and 6:00 AM each day (calibration times).
Note
• The Auto Receive operation is performed only if the watch is in the Timekeeping
Mode or World Time Mode when one of the calibration times is reached. It is not
performed if the calibration time is reached while you are making settings (while
settings are flashing on the display).
• Auto receipt of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that the digital time is set correctly). Before going
to bed for the night, remove the watch from your wrist, and put it in a location where
it can easily receive the signal.
• The receive indicator (
time reception attempts were successful.
• When auto receive is turned on, the watch receives the calibration signal for four to
11 minutes each day when the digital time reaches 2:00 AM, 4:00 AM, and 6:00 AM.
Do not operate any of the watch’s buttons within 15 minutes prior to or following the
calibration times. Doing so can interfere with correct calibration.
• Remember that reception of the calibration signal depends on the time shown on the
digital display. The receive operation will be performed whenever the digital display
shows 2:00 AM, 4:00 AM, and 6:00 AM, regardless of whether or not the displayed
time is actually the correct time.
• When two or three receptions are successful, the watch uses the data of the last
reception for calibration. When only one reception is successful, the watch uses the
data of the successful reception.
To turn auto receive on and off
) indicates that one, two, or all three of the last calibration
1. In the Timekeeping Mode, hold down A until the
current Auto Receive On/Off setting starts to flash,
which indicates the setting screen.
2. Press D to toggle Auto Receive on ( ON) and off
(OFF).
3. Press A to exit the setting screen.
Alarms
Alarm time
Alarm number
Remaining time (Hours :
Minutes Seconds)
To view Alarm Mode screen
In the Alarm Mode, use B and D to cycle through the alarm screens as shown
below.
Press D.
Press B.
• Displaying an alarm time shows any text assigned to it for about two seconds (or a
blank screen if no text is assigned), followed by the remaining time screen.
• Your watch comes preset with the text data “LUNCH” and an alarm time of 12:00PM
(noon) for alarm AL1. You can use this setting as it is or change it to something else.
To set an alarm
Cursor
• There are eight spaces in the text, so you have to press C eight times to move to
the Hour setting.
4. When the setting you want to change is selected, use B and D to change it.
• Selecting the text causes the text input cursor to appear.
• When inputting text, use B and D to cycle through characters at the current
cursor location, and C to move the cursor to the right. See “Inputting Text”.
• While the hour or minute setting is flashing, use D (+) and B (–) to change it.
• When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (no indicator) or p.m. (P indicator).
5. Press A to exit the setting screen.
Note
• Use the above procedure to edit alarm settings, too.
Alarm Operation
The alarm sounds at the preset time for about 20 seconds, or until you stop it by
pressing any button.
• Alarms and the Hourly Time Signal sound in all modes. To view text assigned to
alarms and the remaining time, however, you must enter the Alar m Mode.
You can set three independent Daily Alarms, and even
input text that appears on the display to remind you of the
purpose of each alarm. When an alarm is turned on, the
alarm tone sounds when the alarm time is reached. You
can also turn on an Hourly Time Signal that causes the
Text
watch to beep twice every hour on the hour.
• The remaining time shows the amount of time from the
current time (Timekeeping Mode time) until the alarm
time whose screen is on the display.
• The alarm number (“AL1” though “AL3”) indicates an
alarm screen. “SIG” appears in place of the alarm
number when the Hourly Time Signal screen is shown.
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
AL1 AL2 AL3 SIG
1. In the Alarm Mode, use B and D to select the alarm
whose time you want to set.
2. Hold down A until the flashing cursor appears on the
display, which indicates the setting screen.
• This automatically turns on the alarm.
• Holding down L for about two seconds at this time
sets an alarm time of 12:00AM, without assigning any
text to the alarm.
3. Press C to move the flashing in the sequence shown
below to select other settings.
HourText
Minutes
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, use B and D to select an alarm or the Hourly Time Signal.
2. When the alarm or the Hourly Time Signal you want to is selected, press A to turn
it on and off.
Note
• The on/off status of an alarm is indicated on the corresponding alarm screen (AL1
through AL3). The symbol indicates an alarm is turned on, while absence of the
symbol indicates the alarm is turned off.
• The on/off status of the Hourly Time Signal is indicated on the SIG screen. The
symbol
along with the message “ON” indicates the Hourly Time Signal is turned
on, while the message “OFF” without the
• The alarm on indicator and the Hourly Time Signal on indicator are shown on the
display in all modes while these functions are turned on.
• If any alarm is on, the alarm on indicator is shown on the display in all modes.
symbol indicates it is turned off.
Day Counter
The Day Counter lets you count the number of days from the Timekeeping Mode’s
current date to a specific target date.
• There are five Day Counter records, each of which can be set with its own text and
target date (year, month, day).
• All of the operations in this section are performed in the Day Counter Mode, which
you enter by pressing C.
To recall Day Counter records
Whenever you enter the Day Counter Mode, the Day Counter Number screen appears
for about two seconds, followed by the corresponding Target Date screen.
• In the Day Counter Mode, use B and D to cycle through the Day Counter number
• A Day Counter Number screen remains on the display for about two seconds, after
• The day counter value has a plus sign (+) in front of it when the corresponding target
• Your watch comes preset with the following Day Counter text settings. You can use
To make Day Counter record settings
4. When the setting you want to change is selected, use B and D to change it.
5. Press A to exit the setting screen.
Note
• Use the above procedure to edit Day Counter records, too.
Day Counter Number
Day counter number
Text
screens as shown below.
Press D.
Press B.
which it is replaced by the corresponding Target Date screen. Pressing A while a
Target Date screen is on the display switches to the corresponding Day Counter
Number screen for about two seconds.
date comes after the current date, or a minus sign (–) in front of it when the target
date comes before the current date.
these as they are or change them to something else, if you want.
DC1: 21C (21ST century)
DC2: PAYDAY
DC3: BIRTHDAY
Cursor
• There are eight spaces in the text, so you have to press C eight times to move to
the Year setting.
• When the Year setting is selected, the cursor changes for a four-digit target year.
Though the setting screen shows four digits, other screens show only the last
(rightmost) two digits.
• Selecting the text causes the text input cursor to appear.
• When inputting text, use B and D to cycle through characters at the current
cursor location, and C to move the cursor to the right. See “Inputting Text”.
• While the year, month, or day setting is flashing, use D (+) and B (–) to change
the setting.
• You can set a target date in the range of January 1, 1940 to December 31, 2039.
DC1 DC3 DC4 DC5DC2
1. In the Day Counter Mode, use B and D to scroll
through the Day Counter Number screens until the one
you want is on the display.
2. Hold down A until the flashing cursor appears on the
display, which indicates the setting screen.
• Holding down L for about two seconds at this time
clears the text (if there is any already input) and sets
the current Timekeeping Mode date as the target
date.
3. Press C to move the flashing in the sequence shown
below to select other settings.
Text
Year
▲
Month
Target Date
Target year
Day counter
Day
Target
Month – Day
World Time
Timekeeping Mode time
City code
Current time in the
selected city code
World Time shows the current time in 28 cities (29 time
zones) around the world.
• For full information on city codes, see the “City Code
Ta bl e ”.
• All of the operations in this section are performed in the
World Time Mode, which you enter by pressing C.
To view the time in another city code
While in the World Time Mode, press D to scroll forward
through the city codes (time zones) and B to scroll back.
• If the current time shown for a city is wrong, check your
Timekeeping Mode time and Home City settings and
make the necessary changes.
2
Loading...