Operation Guide 3150

• If you change your Home City to one that is within the same transmitter area, the current DST setting will be retained. If you change to a city that is outside your current transmitter area, DST will be turned off automatically.

Transmitter area city codes

•

TYO , TPE , and SEL

•

HKG , BJS

•

HNL

,

ANC

,

LAX

,

DEN

,

CHI

,

NYC

,

YVR

,

YEA

,

MEX

,

YTO

,

YHZ

, and

YYT

•

LON , PAR , BER , ATH , LIS , MAD , ROM , STO , and MOW

• All other city codes

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

• The DST indicator appears to indicate that Daylight Saving Time is turned 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.

Graphic Area

The information shown in the graphic area depends on the current mode.

Graphic Area

Mode

Timekeeping Mode

Rally Mode

Recall Mode

World Time Mode

Alarm Mode

Stopwatch Mode

CountdownTimer

Mode

Graphic Area

Timekeeping Mode seconds

Target time number/Measurement time 1/10 seconds during measurement

Record number

Timekeeping Mode seconds

No indication

Stopwatch Mode 1/10 seconds

CountdownTimer Mode seconds

Button Operation Tone

The button operation tone sounds any time you press one of the watch’s buttons. You can turn the button operation tone on or off as desired.

• Even if you turn off the button operation tone, the alarms, the Hourly Time Signal, the countdown alarm, and Rally Mode auto start all operate normally.

To turn the button operation tone on and off

In any mode (except when a setting screen is on the display), hold down C to toggle the button operation tone on ( not displayed) and off ( displayed).

• Holding down C to turn the button operation tone on or off also causes the watch’s current mode to change.

• The indicator is displayed in all modes when the button operation tone is turned off.

Power Saving Function

Power saving indicator

When turned on, the Power Saving function enters a sleep state automatically whenever the watch is left in an area for a certain period where it is dark. The table below shows how watch functions are affected by the Power Saving function.

Elapsed Time in Dark

60 to 70 minutes

Display Operation

6 or 7 days

Blank, with Power Saving indicator (PS) flashing

Blank, with Power Saving indicator (PS) not flashing

All functions enabled, except for the display

Auto receive, beeper tone, illumination, and display 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 9:59 PM. If the watch is already in the sleep state when 6:00 AM arrives, however, it will remain in the sleep state.

To recover from the sleep state

Perform any one of the following operations.

• Move the watch to a well-lit area.

• Press any button.

• Angle the watch towards your face for reading.

To turn Power Saving on and off

l l ll l l l l l ll ll lll

On/Off status

ll llll lll

1. In the Timekeeping Mode, hold down A until the city code starts to flash, which indicates the setting screen.

2. Press C nine times until the Power Saving on/off screen appears.

3. Press D to toggle Power Saving on ( ) and off ( ).

4. Press A to exit the setting screen.

• The Power Saving indicator (PS) is on the display in all modes while Power Saving is turned on.

Radio-controlled Atomic Timekeeping Precautions

• Strong electrostatic charge can result in the wrong time being set.

• The time calibration signal bounces 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 manually.

• 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.

• 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 Home City setting reverts to the initial default of

TYO (Tokyo) whenever the battery power level drops to Level 5 or when you have the rechargeable battery replaced. If this happens, change the Home City to the setting you want.

Transmitters

The time calibration signal received by this watch depends on the currently selected Home City code.

• When a U.S. time zone is selected, the watch receives the time calibration signal transmitted from the United States (Fort Collins).

• When a Japanese time zone is selected, the watch receives the time calibration signal transmitted from Japan (Fukushima and Fukuoka/Saga).

• When a European time zone is selected, the watch receives the time calibration signals transmitted from Germany (Mainflingen) and England

(Anthorn).

• When a China time zone is selected, the watch receives the time calibration signals transmitted from China (Shangqiu City).

• When your Home City is LIS, LON, MAD, PAR, ROM, BER, STO, ATH,

MOW (which can receive both the Anthorn and Mainflingen signals), the watch first tries to pick up the signal it last successfully received. If that fails, it tries the other signal. For the first receive after you select your Home City, the watch tries the nearest signal first (Anthorn for LIS, LON, Mainflingen for MAD, PAR, ROM, BER, STO, ATH, and MOW).

Auto Return Features

• If you leave a screen with flashing digits on the display for two or three minutes without performing any operation, the watch exits the setting screen automatically.

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 at high speed.

Initial Screens

When you enter the Rally Mode, Recall Mode, World Time Mode, or Alarm

Mode, the data you were viewing when you last exited the mode appears first.

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 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.

• The current time for all city codes in the Timekeeping Mode and World Time

Mode is calculated in accordance with the Coordinated Universal Time

(UTC) for each city, based on your Home City time setting.

World Time

• The seconds count of the World Time is synchronized with the seconds count of the Timekeeping Mode.

Illumination Precautions

• The electro-luminescent panel that provides illumination loses power after very long use.

• Illumination 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.

• Illumination turns off automatically whenever an alarm sounds.

• Frequent use of illumination runs down the battery.

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