Casio 2578 Owner's Manual
MO0212-A
About This Manual
(Light)
USER’S GUIDE 2578
• 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
• In the Timekeeping Mode, use C (forward) and A (back) to scroll through the
mode names in the text area of the display. When the text area shows the mode you
want, press B to enter the mode.
• In any mode, press L to illuminate the display.
Timekeeping Mode
Press C.
▲
Press A.
▲
Text area
▲
▲
World Time Mode
▲
Time Setting Mode
▲
Radio-controlled Timekeeping
PM
indicator
Hour : Minutes Seconds
DST indicator
Month – Day
Day of week
To set your Home City
Text area
City code
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 three
times a day at 2:00 AM, 4:00 AM, and 6:00 AM. 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!
• 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.
This watch is designed to pick up a time calibration signal
transmitted from Mainflingen, Germany (located 25
kilometers southeast of Frankfurt), and update its time
setting accordingly. The time calibration signal includes
both Standard Time and Daylight Saving Time (summer
time) data.
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.
• See “Setting the Time and Date Manually” for
information about manual settings.
1. From the Timekeeping Mode, use C and A to display
SET (Time Setting Mode) in the text area.
2. Press B to enter the Time Setting Mode.
3. Press B so the current city code is flashing in the text
area.
4. Use C (+) and A (–) to scroll through the city codes in
the text area until the one you want to use as your
Home City is displayed.
• The following are the city codes for major cities in the
Western Europe time zones.
BER and PAR: Berlin, Paris, Milan, Rome,
Amsterdam, Hamburg,
LON: London
5. Press B nine times, until the text area shows the Time
Setting Mode indicator (
6. Press C to return to the Timekeeping Mode.
• 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
operation (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.
Resin
Band
Metal Band
Frankfurt, Vienna
SET).
Alarm Mode
▲
▲
Stopwatch Mode
▲
▲
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or
among
buildings
• Signal reception is normally better at night than during the day.
• Time calibration signal reception takes from two to six minutes. Take care that you
do not perform any button operations or move the watch during this time.
About Auto Receive
When auto receive is turned on, the watch automatically starts to receive the time
calibration signal when the 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 a calibration time is reached while an alarm is sounding, or 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 Timekeeping Mode 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.
• When auto receive is turned on, the watch receives the calibration signal for two to
six minutes everyday when the time in the Timekeeping Mode reaches each of the
three calibration times. Do not perform any button operation within six minutes
before or after any of the three calibration times. Doing so can interfere with correct
calibration.
• Remember that reception of the calibration signal depends on the time kept in the
Timekeeping Mode. The receive operation is performed whenever the display shows
one of the three calibration times, regardless of whether or not the Timekeeping
Mode 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.
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.
Frankfurt
Receive indicator
Inside a
Near
vehicle
household
appliances or
office
equipment
• This watch is able to receive the time calibration signal
transmitted from Mainflingen, Germany (located 25
kilometers southeast of Frankfurt). Signal reception is
possible within the area represented by a circle with a
radius of about 1,000 kilometers.
• At distances further than about 500 kilometers, the
signal may become weak and reception may be
impossible under certain conditions.
• Signal reception may be poor in the shaded area on the
map, even though it is within 1,000 kilometers of the
signal transmitter.
• See the information under “Signal Receive
Troubleshooting” if you experience problems with time
calibration signal reception.
Date Alert Mode
▲
Time Recorder Mode
▲
Near a
construction
site, airport, or
other sources
of electrical
noise
Near hightension
power lines
▲
▲
Among or
behind
mountains
Weak
Strong
1
USER’S GUIDE 2578
• 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.
• 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.
• The receive indicator appears only when the watch is able to successfully receive
both time and date data. It does not appear when only time data is received.
• The receive indicator indicates that at least one of the three calibration signal
receive operations was successful. Note, however, that the receive indicator is
cleared from the display at 3:00 AM each day.
To perform manual receive
Receive indicator
Note
• To interrupt a receive operation and return to the Timekeeping Mode, press B.
• If the receive operation is unsuccessful, the message
for about one or two minutes. After that, the watch returns to the Timekeeping Mode.
• You can also change from the Last Signal or ERR screen to the normal
timekeeping screen by pressing B.
To turn auto receive on and off
Text area
To display the Last Signal screen
In the Timekeeping Mode, press B to display the Last Signal screen (GET). The
Last Signal screen shows the date and time that the time calibration signal was last
received.
On/off status
1. Place the watch on a stable surface so its top (12
o’clock side) is facing towards a window.
• Note that signal reception is poor if the watch is on its
back or side.
2. In the Timekeeping Mode, hold down B for about two
seconds until the watch beeps.
3. Release B and the message
area to indicate that signal reception has started.
• Time calibration signal reception takes from two to six
minutes. 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.
1. From the Timekeeping Mode, use C and A to display
SET (Time Setting Mode) in the text area.
2. Press B to enter the Time Setting Mode.
3. Press A or C to toggle auto receive on (
(
OF).
• If the current Home City setting is a city code that
does not support auto receive, “xx” appears in place
of the on/off indicator. This means you cannot turn
auto receive on or off.
4. Press B 10 times, until the text area shows the Time
Setting Mode indicator (
5. Press C to return to the Timekeeping Mode.
Home city time
Press B.
▲
▲
Receive date
RC! appears in the text
ERR appears on the display
ON) and off
SET).
Receive time
Alternate at twosecond interval
Last Signal Screen
Signal Receive Troubleshooting
Check the following points whenever you experience problems with calibration signal
reception.
Problem
Cannot perform
manual receive.
Auto receive is
turned on, but
the receive
indicator does
not appear on
the display.
Time setting is
incorrect
following signal
reception.
• For further information, see “Time Calibration Signal Reception” and “Time
Calibration Signal Reception Precautions.”
Probable Cause
•
The watch is not in the Timekeeping Mode.
• Your current Home City is not one of the
following city codes:
BER, PAR , LON, or AT H.
• You changed the time setting manually.
• The watch was not in the Timekeeping
or World Time Mode, or you were
performing some button operation
during the auto receive operation.
•
Even if receive is successful, the receive
indicator disappears every day at 3 am.
• Time data (hour, minutes, seconds) only
was received during the last receive
operation. The receive indicator appears
only when time data and date data
(year, month, day) are both received.
• If the time is one hour off, the DST
setting may be incorrect.
• The Home City code setting is not
correct for the area where you are using
the watch.
What you should do
• Enter the Timekeeping Mode
and try again.
• Select BER, PAR, LON, or
ATH as your Home City.
• Perform manual signal receive
or wait until the next auto
signal receive operation is
performed.
• Check to make sure the watch
is in a location where it can
receive the signal.
• Change the DST setting to
Auto DST.
• Select the correct Home City
code.
Timekeeping
PM indicator
Hour: Minutes Seconds
DST indicator
Month — Day
Day of week
To set the current time and date manually
Auto Receive
R/C)
Screen (
Mode Indicator
SET)
(
4. Use the operations shown below to configure auto receive, city code, DST, and
12/24-hour format settings.
Text area
indicator:
R/C
BER
DST
12H
5. Press B while 12H/ 24H is shown in the text area to advance to the time setting
screen, which is indicated by the seconds flashing.
6. Use the operations shown below to configure time and date settings.
Screen:
50
P
10
58
'02
6
30
7. To return to the Timekeeping Mode, use B to scroll to the mode indicator (SET),
and then press C.
• See “City Code Table” for a complete list of available city codes.
• The auto receive setting is used for time calibration signal reception only. See “About
Auto Receive” for details.
Daylight Saving Time (DST)
Daylight Saving Time (summer time) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use Daylight
Saving Time.
The time calibration signal transmitted from Mainflingen includes both Standard Time
and DST data. When the Auto DST setting is turned on, the watch switches between
Standard Time and DST (summer time) automatically in accordance with the
Mainflingen signal.
• The default DST setting is Auto DST (
or
ATH as your Home City code.
• If you experience problems receiving the time calibration signal in your area, it is
probably best to switch between Standard Time and Daylight Saving Time (summer
time) manually.
To change the Daylight Saving Time (summer time) setting
1. From the Timekeeping Mode, use C and A to display SET (Time Setting Mode)
in the text area.
2. Press B to enter the Time Setting Mode.
3. Press B twice so
4. Use C or A to cycle through the DST settings in the sequence shown below.
Auto DST( ) DST Off( ) DST On( )
Use the Timekeeping Mode to set and view the current
time and date.
Setting the Time and Date Manually
Make sure you select your Home City code before you
change the current time and date settings. World Time
Mode times are all displayed in accordance with the
Timekeeping Mode settings. Because of this, World Time
Mode times will not be correct if you do not select the
proper Home City code before setting the time and date in
the Timekeeping Mode.
1. From the Timekeeping Mode, use C and A to display
SET (Time Setting Mode) in the text area.
2. Press B to enter the Time Setting Mode.
3. Press B to cycle through the setting screens in the
sequence shown below.
Text area
City Code
Screen
Day
To do this:
Toggle between auto receive on
(ON) and off (OF)
Change the city code
Toggle between Daylight Saving
Time (
ON) and Standard Time (OF)
Toggle between 12-hour (12H) and
24-hour (
24H) timekeeping
DST is in the text area. This is the DST setting screen.
DST Screen
(
DST)
Month Year Minutes Hour Seconds
Time setting
12/24-hour Format
Do this:
(
Press A or C.
Use C (+) and A (–).
Press A or C.
• Pressing A or C performs
a different operation when
BER, PAR, LON, or ATH is
selected as Home City code.
See “To change the Daylight
Saving Time (summer time)
setting.”
Press A or C.
To do this:
Reset the seconds to 00
Change the hour
Change the minutes
Change the year
Change the month
Change the day
A) whenever you select BER, PAR, LON,
Do this:
Press A or C.
Use C (+) and A (–).
12H/24H)
5. When the setting you want is displayed, press B eight times, until the text area
shows the Time Setting Mode indicator (
6. Press C to return to the Timekeeping Mode.
SET).
2
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