USER’S GUIDE 2617
5
Auto Return Features
• If you leave the watch without performing any operation in the Signal Receive,
Recall, e-DATA MEMORY, or Alarm Mode for two or three minutes, it automatically
changes to the Mode Menu screen.
• If you leave a screen with flashing digits or a cursor on the display for two or three
minutes without performing any operation, the watch automatically exits the setting
screen.
Scrolling
The B and D buttons are used in various modes and setting screens to scroll
through 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 e-DATA MEMORY, World Time, or Alarm Mode, the data you were
viewing when you last exited the mode appears first.
Time Calibration Signal Reception Precautions
• Signal reception is terminated if any alarm starts to sound while reception is being
performed.
• Strong electrostatic charge can result in the wrong time being set.
• Even when the watch is within the reception range of the transmitter, signal
reception is impossible if the signal is blocked by mountains or other geological
formations between the watch and signal source.
• Signal reception is affected by weather, atmospheric conditions, and seasonal
changes.
• The time calibration signal is bounced off the ionosphere. Because of this, such
factors as changes in the reflectivity of the ionosphere, as well as movement of the
ionosphere to higher altitudes due to seasonal atmospheric changes or the time of
day may change the reception range of the signal and make reception temporarily
impossible.
• Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.
• 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, 2099. Setting of the date by the time
calibration signal cannot be performed starting from January 1, 2100.
• This watch can receive signals that differentiate between leap years and non-leap
years.
• Though this watch is designed to receive both time data (hour, minutes, seconds)
and date data (year, month, day), certain signal conditions can limit reception to time
data only.
• When all three auto receptions are successful (2:00 AM, 4:00 AM, and 5:00 AM), 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.
• Normally, the signal reception date shown by the Last Signal screen is date data that
is included in the received time calibration signal. When only time data is received,
however, the Last Signal screen shows date as kept in the Timekeeping Mode at the
time of signal reception.
• If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time within ±15 seconds a month at normal temperature.
Timekeeping
• Resetting the seconds to 00 while the current count is in the range of 30 to 59
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to
00 without changing the minutes.
• The day of the week is automatically displayed in accordance with the date (year,
month, and day) settings.
• The year can be set in the range of 2000 to 2099.
Setting
City code
DST (summer time)
Auto receive
Initial Factory Default
BER (Berlin)
AUTO(Auto switching)
On (Auto receive)
• If you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your current city code and DST
(summer time) settings, and auto receive setting. The following are the initial factory
defaults for these settings.
• The watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to change
it except after you have the watch’s battery replaced.
• The current time for all city codes in the Timekeeping Mode and World Time Mode is
calculated in accordance with the Greenwich Mean Time (GMT) differential for each
city, based on your Home City time setting.
• GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC*) data.
* The letters “UTC” stands for “Universal Time Coordinated,” which is the world-wide
scientific standard of timekeeping. It is based upon carefully maintained 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
applied in all modes.
• With the 12-hour format, the P (PM) indicator appears on the display for times in the
range of noon to 11:59 p.m. and the A (AM) indicator appears for times in the range
of midnight to 11:59 a.m.
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
Backlight Precautions
The backlight uses an EL (electro-luminescent) panel that causes the entire display to
glow for easy reading in the dark. In any mode, press L to illuminate the display for
about one second.
• The electro-luminescent panel that provides illumination loses power after very long
use.
• The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
• The watch may emit an audible sound whenever the display is illuminated. This is
due to vibration of the EL panel used for illumination, and does not indicate
malfunction.
• The backlight automatically turns off whenever an alarm sounds.
• Frequent use of the backlight shortens the life of the battery.
Battery
The indicator BATT flashes on the display any time
battery power is below a certain level. Low battery power
can cause the following conditions to occur.
• Dim, difficult-to-read display characters
• Failure of the backlight and beeper tone operations
• Inability to perform time calibration signal reception
• Inability to create a time memo, or to perform Recall
Mode, and e-DATA MEMORY Mode operations
If battery power goes low while you are inputting Time Memo, e-DATA MEMORY, or
alarm text data, the data you are inputting may not be saved in memory. Normal watch
operation will return after the BATT indicator disappears. If it does not disappear, have
the battery replaced.
Always leave battery replacement up to the dealer where you bought the watch or
to an authorized CASIO distributor. Be sure to show the “Attention dealer or CASIO
distributor” information to the person replacing the battery.
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Indicator
If you use the backlight or any of the alarm functions a number of times during a short
period,
appears at the top of the display screen, and the following operations
become disabled until battery power recovers.
Backlight; Beeper tone; Time calibration signal reception; Time memo creation
operation; Recall and e-DATA MEMORY Mode operations
• After some time, battery power will recover and will disappear, indicating
that the above functions are enabled again.
• The word
ERROR
appearing on the display when you try to perform a time memo
operation or an e-DATA MEMORY Mode operation indicates that the watch cannot
access its memory because battery power is momentarily too low.
ERROR
changes to after about two or three minutes, or if you press C.
• If battery power cannot recover sufficiently within about 10 minutes after the
indicator appears, the BATT indicator is displayed to let you know that
battery power is low.
Attention dealer or CASIO distributor
1. Open and remove the back cover.
• Opening the back cover causes the word
OPEN to appear on the display.
• If
CLOSE appears on the display when you open the back cover, replace the
back cover. Wait for a few minutes and try again.
2. Remove the battery holder.
3. Remove the old battery and load a new one.
4. Touch the AC contact and the battery [+] side with metal tweezers.
• The AC (all clear) operation DOES NOT delete time memos and e-DATA
MEMORY Mode data stored in memory.
5. Replace the battery holder.
6. Close the back cover.
• After you perform the above procedure, the watch automatically performs an internal
check of the data in its memory. The Mode Menu screen appears after the internal
check is complete. The word
CHECK appears at the top of the display screen if
the watch discovers a problem during the internal check. The
CHECK may remain
on the display for a number of minutes as the watch repairs the memory data. All
watch buttons are disabled while
CHECK is on the display.
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