Operation Guide 2639 2819

3.Use Cto 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.

This indicator:

Means this:

 

The currently selected Home City code supports signal reception.

The currently selected Home City code does not support 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 Cand Ato select the other time and date settings, and change the settings as described above.

5.When the setting you want to change is flashing, use B and/or Dto change it as described below.

City Settings

Screen:

To do this:

Do this:

 

Change the city code

Use D(east) and B(west).

 

 

 

 

Cycle between Daylight Saving Time

Press D.

 

(ON), Standard Time (OFF), and

 

 

Auto DST (AUTO)

 

 

Toggle between auto receive on

Press D.

 

(ON) and off (OFF)

 

•See “City Code Table” for a complete list of available city codes.

Time/Date/Power Saving Settings

Screen:

To do this:

Do this:

 

Toggle between 12-hour (12H) and

Press D.

 

24-hour (24H) timekeeping

 

 

Reset the seconds to 00

Press D.

 

Change the hour or minutes

Use D(+) and B(–).

 

Change the month, day, or year

Use D(+) and B(–).

 

 

 

 

Toggle the Power Saving on (ON)

Press D.

 

and off (OFF)

 

6. Use Ato 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 Aonce.

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 Auntil the transmitter indicator starts to flash, which indicates the setting screen.

2.Press Ctwice and the DST setting screen appears.

3.Use D to cycle through the DST settings in the sequence shown below.

Auto DST (AUTO)

 

 

DST off (OFF)

 

 

DST on (ON)

 

 

 

 

 

 

 

4. When the setting you want is selected, press Atwice to exit the setting screen.

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

Initial Factory Default

Transmitter

AUTO (Auto switching)

City code

TYO

(Tokyo)

DST (summer time)

DST

(Auto switching)

 

AUTO

 

Auto receive

 

(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 Auntil 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 Dcycles through the available auto

 

receive settings as described below.

 

AUTO : The watch automatically selects the

 

 

frequency that has the strongest signal.

Transmitter indicator

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.

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.

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.

Elapsed Time

Display

Operation

in Dark

 

 

60 to 70 minutes

Blank, with Sleep indicator

All functions enabled, except

 

(SLEEP / SLEEP) flashing

for the display

6 or 7 days

Blank, with Sleep indicator

Beeper tone, backlight, display,

 

(SLEEP / SLEEP) not flashing

and auto receipt of the

 

 

calibration signal are disabled.

•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.

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