Operation Guide 3215 3222
Tidal Movements
Tides are the periodic rise and fall of the water of oceans, seas, bays, and other bodies of water caused mainly by the gravitational interactions between the Earth, Moon and Sun. Tides rise and fall about every six hours. The Tide Graph of this watch indicates tidal movement based on the Moon’s transit over a meridian and the lunitidal interval. The Tide Graph calculates and graphically represents current tide conditions in your currently selected site or USER site based on longitudes, lunar day length, and lunitidal interval preset in watch memory, and on high tide times specified by you.
Tide Graph
The Tide Graph graphically represents the current tide condition using one of three patterns that represent spring tide, intermediate tide, and neap tide, as shown below.
Tide Name | Graph | Description |
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Spring Tide |
| Large difference between high tide |
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| and low tide. Occurs a few days |
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| before and after a New Moon and Full |
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| Moon. |
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Intermediate Tide |
| Medium difference between high tide |
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| and low tide. |
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Neap Tide |
| Small difference between high tide |
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| and low tide. Occurs a few days |
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| before and after the first quarter and |
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| last quarter of a half moon. |
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•The Tide Graph flashes as shown below to indicate the tide range.
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•The segments on either end of the Tide Graph flash during low tide.
Lunitidal Interval
Theoretically, high tide is at the moon’s transit over the meridian and low tide is about six hours later. Actual high tide occurs somewhat later, due to factors such as viscosity, friction, and underwater topography. Both the time differential between the moon’s transit over the meridian until high tide and the time differential between the moon’s transit over the meridian until low tide are known as the “lunitidal interval”. Tide data is calculated using the lunitidal intervals preset for each site.
Button Operation Tone
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| The button operation tone sounds any time you press one | ||||
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| the Hourly Time Signal, and other beepers all operate | ||||
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| Mute indicator |
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To turn the button operation tone on and off |
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| 1. In the Timekeeping Mode, hold down Auntil the city | ||||
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| code starts to flash, which indicates the setting screen. | |||||
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| 2. Press Cnine times until the current button operation | |||||
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| tone setting ( | or | ) appears. |
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| 3. Press Dto toggle the setting between | (tone on) | ||||
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| and | (tone off). |
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| 4. Press A twice to exit the setting screen. |
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•The mute indicator is displayed in all modes when the button operation tone is turned off.
Power Saving Function
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.
Power saving indicator
Elapsed Time | Display | Operation |
in Dark |
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60 to 70 minutes | Blank, with Power Saving | All functions enabled, except for the |
| indicator flashing | display |
6 or 7 days | Blank, with Power Saving | Auto receive, beeper tone, |
| indicator not flashing | 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
•Press any button.
•Angle the watch towards your face for reading.
To turn Power Saving on and off
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| 1. In the Timekeeping Mode, hold down Auntil the city | |
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| code starts to flash, which indicates the setting screen. | |
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| 2. Press C11 times until the Power Saving on/off screen | ||
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| 4. Press Atwice to exit the setting screen. | |
On/Off status | • The Power Saving indicator 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
•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, 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
•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.
•The watch will return to the Timekeeping Mode automatically if you do not perform any operation for two or three minutes in the Tide/Moon Data Mode.
Scrolling
The Band D 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 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
•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
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•Illumination may be difficult 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.
Auto light switch precautions
•Avoid wearing the watch on the inside of your wrist. Doing so causes the auto light switch to operate when it is not needed, which shortens battery life. If you want to wear the watch on the inside of your wrist, turn off the auto light switch feature.
More than 15 degrees | • Illumination may not turn on if the face of the watch is |
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too high | more than 15 degrees above or below parallel. Make |
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| sure that the back of your hand is parallel to the ground. |
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| • Illumination turns off after a preset amount of time (1.5 |
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| or 3 seconds), even if you keep the watch pointed |
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| towards your face. |
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• Static electricity or magnetic force can interfere with proper operation of the auto |
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light switch. If illumination does not turn on, try moving the watch back to the starting |
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position (parallel with the ground) and then tilt it back toward you again. If this does |
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not work, drop your arm all the way down so it hangs at your side, and then bring it |
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back up again. |
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• Under certain conditions, illumination may not turn on until about one second after |
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you turn the face of the watch towards you. This does not necessarily indicate |
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malfunction of the auto light switch. |
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• You may notice a very faint clicking sound coming from the watch when it is shaken |
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back and forth. This sound is caused by mechanical operation of the auto light |
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switch, and does not indicate a problem with the watch. | 7 | |
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