Operation Guide 5161

•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.

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.

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•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 the time with the precision noted in “Specifications”.

•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 (page E-54), and auto receive settings (page E-27).

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•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 (page E-12).

Transmitters

The time calibration signal received by this watch depends on the currently selected Home City code (page E-12).

•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 LON, PAR, ATH (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 LON, Mainflingen for PAR and ATH).

•When your Home City is TYO (which can receive both 40 kHz and 60 kHz signals), the watch first tries to pick up the signal it last successfully received. If that fails, it tries the other signal.

Auto Return

If you do not perform any operation for about two or three minutes while a setting screen (with a flashing setting) is on the display, the watch will exit the setting screen automatically.

Scrolling

The C button is used in various modes and setting screens to scroll through data on the display. In most cases, holding down this button during a scroll operation scrolls at high speed.

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Initial Screens

When you enter the World Time Mode or Alarm Mode, the data you were viewing when you last exited the mode appears first.

World Time

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

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.

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Illumination Precautions

An LED (light-emitting diode) and a light guide panel illuminate the face of the watch for easy reading in the dark. In any mode, press A to illuminate the face of the watch for about one second.

•The illumination provided by the light may be difficult to see when viewed under direct sunlight.

•Illumination turns off automatically whenever an alarm sounds.

•Frequent use of illumination shortens the battery operating time.

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Specifications

Accuracy at normal temperature: ± 15 seconds a month

Digital Timekeeping: Hour, minutes, seconds, a.m./p.m. (P), day, day of the week Time system: Switchable between 12-hour and 24-hour formats Calendar system: Full Auto-calendar pre-programmed from the year

2000 to 2099

Other: Home City code (can be assigned one of 29 city codes); Daylight Saving Time (summer time)/Standard Time

Analog Timekeeping: Hour, minutes (hand moves every 10 seconds), seconds

Time Calibration Signal Reception: Auto receive 6 times a day (5 times a day for the Chinese calibration signal) (Remaining auto receives cancelled as soon as one is successful); Manual receive

Receivable Time Calibration Signals: Mainflingen, Germany (Call Sign: DCF77, Frequency: 77.5 kHz); Anthorn, England (Call Sign: MSF, Frequency: 60.0 kHz); Fort Collins, Colorado, the United States (Call Sign: WWVB, Frequency:

60.0kHz); Fukushima, Japan (Call Sign: JJY, Frequency: 40.0 kHz); Fukuoka/ Saga, Japan (Call Sign: JJY, Frequency: 60.0 kHz); Shangqiu City, Henan Province, China (Call Sign: BPC, Frequency: 68.5 kHz)

World Time: 29 cities (29 time zones)

Other: Daylight Saving Time/Standard Time

Alarms: 5 daily alarms; Hourly Time Signal

Stopwatch:

Measuring unit: 1/100 seconds

Measuring capacity: 59' 59.99''

Measuring mode: Elapsed time

Countdown Timer: Measuring unit: 1 second

Input range: 1 minute to 100 minutes (1-minute increments) Illumination: LED (light-emitting diode)

Other: Power Saving, Battery power indicator, Button operation tone on/off, day of the week language selection

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Power Supply: Solar cell and one rechargeable battery

Approximate battery operating time: 4 months (from full charge to Level 4) under the following conditions:

•Watch not exposed to light

•Internal timekeeping

•Display on 18 hours per day, sleep state 6 hours per day

•1 illumination operation (1.5 second) per day

•10 seconds of alarm operation per day

•Approximately 4 minutes of signal reception per day

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