Casio 2639 - Manual (Page 5)

Operation Guide 2639 2819
5
3. Use C to display the transmitter screen.
• The transmitter indicator that appears indicates whether the currently selected
Home City code is one that supports time calibration signal reception.
• 60 appears for the transmitter while NYC , CHI , DEN , LAX , ANC , or HNL
is selected as the Home City. In this case, there is not need to select a transmitter.
• You can change the transmitter when HKG , TYO , or SEL is selected as the
Home City. For details, see “To configure auto receive settings for Japan”.
4. Use C and A to select the other time and date settings, and change the settings
as described above.
This indicator: Means this:
The currently selected Home City code supports signal reception.
The currently selected Home City code does not support signal
reception.
Screen: To do this:
Change the city code
Cycle between Daylight Saving Time
(ON), Standard Time (OFF), and
Auto DST (AUTO)
Toggle between auto receive on
(ON) and off (OFF)
Do this:
Use D (east) and B (west).
Press D.
Press D.
City Settings
5. When the setting you want to change is flashing, use B and/or D to change it as
described below.
• See “City Code Table” for a complete list of available city codes.
6. Use A to exit the setting screen.
• If a Transmitter/City Setting screen is displayed, press A twice.
• If a Time/Date/Power Saving Setting screen is displayed, press A once.
Screen: To do this:
Toggle between 12-hour ( 12H ) and
24-hour ( 24H ) timekeeping
Reset the seconds to 00
Change the hour or minutes
Change the month, day, or year
Toggle the Power Saving on (ON)
and off (OFF)
Do this:
Press D.
Press D.
Use D (+) and B (–).
Use D (+) and B (–).
Press D.
Time/Date/Power Saving Settings
Note
• Auto DST (AUTO) can be selected only while HNL , ANC , LAX , DEN , CHI ,
NYC , HKG , TYO , or SEL is selected as the Home City code. For more
information, see “Daylight Saving Time (DST)” below.
• 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 Fort Collins 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 received
time signal.
• The time calibration signals transmitted from Fukushima and Fukuoka/Saga do not
include summer time data.
• The default DST setting is Auto DST (AUTO) whenever you select HNL , ANC ,
LAX , DEN , CHI , NYC , HKG , TYO , or SEL 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. In the Timekeeping Mode, hold down A until the transmitter indicator starts to
flash, which indicates the setting screen.
2. Press C twice and the DST setting screen appears.
3. Use D to cycle through the DST settings in the sequence shown below.
4. When the setting you want is selected, press A twice to exit the setting screen.
Auto DST ( AUTO ) DST off ( OFF ) DST on ( ON )
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto Return Features
• If you leave the watch in the Time Recorder Mode or Alarm Mode for two or three
minutes without performing any operation, it automatically returns to the
Timekeeping Mode.
• If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch automatically saves anything you have
input up to that point and exits the setting screen.
Data and Setting 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 Alarm or World Time Mode, the data you were viewing when you
last exited the mode appears first.
Radio-controlled Atomic Timekeeping Precautions
• Strong electrostatic charge can result in the wrong time being set.
• 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 update the date and day of the week automatically 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.
• Normally, the signal reception date shown by the Last Signal screen is the date data
included in the received time calibration signal. When only time data is received,
however, the Last Signal screen shows the 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.
• 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, DST (summer
time), and auto receive settings. The following are the initial factory defaults for these
settings.
Setting
Transmitter
City code
DST (summer time)
Auto receive
Initial Factory Default
AUTO (Auto switching)
TYO (Tokyo)
DST (Auto switching)
AUTO
(Auto receive)
ON
To configure auto receive settings for Japan
Note
• The following procedure applies when you have TYO (Tokyo) selected as your
Home City. If you are using the watch in the U.S., see “To configure the auto receive
setting for the U.S.”.
1. In the Timekeeping Mode, hold down A until the
transmitter indicator starts to flash, which indicates the
setting screen.
2. Use D to select the transmitter you want to use.
• Each press of D cycles through the available auto
receive settings as described below.
AUTO : The watch automatically selects the
frequency that has the strongest signal.
40 : Receives the signal from Fukushima
(40kHz).
60 : Receives the signal from Fukuoka/Saga
(60kHz).
3. Press C three times to move the flashing to the auto
receive on/off setting.
4. Press D to toggle auto receive on (ON) and off (OF).
5. Press A twice to exit the setting screen.
• Reception can take up to 12 minutes when the AUTO
option is selected.
Transmitter indicator
Timekeeping
• 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.
• 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 or when battery power drops to
Level 4.
• 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 the your Home City time setting.
• GMT differential is calculated by this watch based on 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 accurate 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 also
applied in all other modes.
• When 12-hour timekeeping is selected, the P (p.m.) indicator is displayed from noon
to 11:59 p.m.
• Module 2639 also displays an A (a.m.) indicator from midnight until 11:59 a.m.
Module 2819 does not display any indicator during a.m. times.
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
Elapsed Time
in Dark
60 to 70 minutes
6 or 7 days
Display
Blank, with Sleep indicator
(
SLEEP / SLEEP) flashing
Blank, with Sleep indicator
(
SLEEP / SLEEP) not flashing
Operation
All functions enabled, except
for the display
Beeper tone, backlight, display,
and auto receipt of the
calibration signal are disabled.
Power Saving Function
When turned on, the Power Saving function automatically enters a sleep state
whenever the watch is left in an area where it is dark for a certain period. The table
below shows how watch functions are affected by the Power Saving function.
• Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.
• The watch will not enter the sleep state between 6:00 AM and 10:59 PM. If the
watch is already in the sleep state when 6:00 AM arrives, however, it will remain in
the sleep state.