USER’S GUIDE 2534/2654
•Always make sure you are in a safe place whenever you are reading the display of the watch using the auto light switch. Be especially careful when running or engaged in any other activity that can result in accident or injury. Also take care that sudden illumination by the auto light switch does not surprise or distract others around you.
•When you are wearing the watch, make sure that its auto light switch is turned off before riding on a bicycle or operating a motorcycle or any other motor vehicle. Sudden and unintended operation of the auto light switch can create a distraction, which can result in a traffic accident and serious personal injury.
To turn the auto light switch on and offIn the Timekeeping Mode, hold down Dfor about two seconds to toggle the auto light switch on (AUTO EL displayed) and off (AUTO EL not displayed).
•The auto light switch on indicator (AUTO EL) is on the display in all modes while the auto light switch is turned on.
Battery
This watch is equipped with a solar cell and a rechargeable battery (secondary battery) that is charged by the electrical power produced by the solar cell. The illustration shown below shows how you should position the watch for charging.
Example: Orient the watch so its | Solar cell |
face is pointing at a light source. |
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• Note that charging efficiency drops |
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when any part of the solar cell is |
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blocked by clothing, etc. |
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• The illustration shows how to position |
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a watch with a resin band. |
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•Storing the watch for long periods in an area where there is no light or wearing it in such a way that it is blocked from exposure to light can cause rechargeable battery power to run down. Be sure that the watch is normally exposed to bright light whenever possible.
•This watch employs a solar cell that converts light into electricity, which charges a
•The rechargeable battery should be replaced with a
•All data stored in memory is deleted, and the current time and all other settings return to their initial factory defaults whenever battery power drops to Level 5 and when you have the battery replaced.
•Turn on the watch’s Power Saving function and keep it in an area normally exposed to bright light when storing it for long periods. This helps to keep the rechargeable battery from going dead.
Battery Power Indicator
The battery power indicator on the display shows you the current status of the rechargeable battery’s power.
Battery power indicator | Level Battery Power | Function Status |
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| 1 | All functions enabled. |
| 2 | All functions enabled. |
| 3 | All functions enabled. |
| 4 | Beeper tone, backlight, |
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| display, and buttons are |
| (Charge Soon Alert) | disabled. |
| 5 | All functions, including |
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| timekeeping, are disabled. |
•The flashing 
indicator at Level 4 tells you that battery power is very low, and that exposure to bright light for charging is required as soon as possible.
•At Level 5, all functions are disabled and settings return to their initial factory defaults. Functions are enabled once again after the rechargeable battery is charged, but you need to set the current time, date, and all other settings after the battery is recharged to Level 3 from Level 5. Though the time appears on the display after the battery is charged to Level 4, you will not be able to change the time setting until the battery reaches Level 3.
•Leaving the watch in direct sunlight or some other very strong light source can cause the battery power indicator to temporarily show a reading that is higher than the actual battery level. The correct battery power indicator should appear after a few minutes.
•If you use the backlight or any of the alarm functions a number of times during a short period, RECOVER appears on the display and the following operations become disabled until battery power recovers.
Backlight Beeper tone
After some time, battery power will recover and RECOVER will disappear, indicating that the above functions are enabled again.
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid leaving the watch in the areas described below whenever charging its rechargeable battery. Also note that allowing the watch to become very hot can cause its liquid crystal display to black out. The appearance of the LCD should become normal again when the watch returns to a lower temperature.
Warning!
Leaving the watch in bright light to charge its rechargeable battery can cause it to become quite hot. Take care when handling the watch to avoid burn injury. The watch can become particularly hot when exposed to the following conditions for long periods.
•On the dashboard of a car parked in direct sunlight
•Too close to an incandescent lamp
•Under direct sunlight
Charging Guide
After a full charge, timekeeping remains enabled for up to about nine months (Module 2534)/11 months (Module 2654), while the watch is used under the conditions described below.
Operating Conditions•Watch is not exposed to light
•Display on 18 hours per day, sleep state 6 hours per day
•1 backlight operation (1.5 seconds) per day
•10 seconds of alarm operation per day
•1 countdown timer operation per day
Charge TimesExposing the watch to light for the periods shown below each day restores the power used by the above operating conditions.
| Exposure Level (Brightness) | Approximate Exposure Time |
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Outdoor Sunlight (50,000 lux) | 5 minutes |
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Sunlight Through a Window (10,000 lux) | 24 minutes |
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Daylight Through a Window on a Cloudy Day | 48 minutes |
(5,000 lux) |
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Indoor Fluorescent Lighting (500 lux) | 8 hours |
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•Stable operation is promoted by frequent charging.
Recovery TimesThe table below shows the amount exposure that is required to take the battery from one level to the next.
| Exposure Level |
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| Approximate Exposure Time |
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Level 5 |
| Level 4 |
| Level 3 | Level 2 | Level 1 |
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Outdoor Sunlight | 65 minutes (Module 2534) | 18 hours (Module2534) | 4 hours |
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(50,000 lux) | 1 hour (Module 2654) |
| 14 hours (Module 2654) |
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Sunlight Through a |
| 4 hours |
| 98 hours (Module 2534) | 19 hours |
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Window(10,000 lux) |
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| 67 hours (Module 2654) |
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Daylight Through a Window | 7 hours (Module 2534) |
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on a Cloudy Day (5,000 lux) | 6 hours (Module 2654) |
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Indoor Fluorescent Lighting | 60 hours |
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| – – – |
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(500 lux) |
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•The above exposure time values are all for reference only. Actual required exposure times depend on lighting conditions.
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.
Power Saving Function
When turned on, the Power Saving function automatically puts the watch into a sleep state whenever it is left in an area where it is dark for 30 to 35 minutes. The sleep state is indicated by a blank screen with SLEEP flashing on it. In the sleep state, all functions are enabled, except for the display.
•Wearing watch inside the sleeve of clothing can cause it to enter the sleep state.
To recover from the sleep statePerform 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 off1. In the Timekeeping Mode, hold down Auntil the seconds start to flash, which indicates the setting screen.
2. Press Cseven times until the Power Saving on/off screen appears.
3. Press Dto toggle Power Saving on (ON) and off (OFF).
4. Press Ato exit the setting screen.
•The Power Saving on indicator (SAVE) is on the display in all modes while the Power Saving is turned on.
Auto Return Feature
If you leave a screen with flashing digits on the display for two or three minutes without performing any operation, the watch automatically saves any settings you have made up to that point and exits the setting screen.
Initial Screens
When you enter the Telememo, World Time, or Alarm Mode, the data you were viewing when you last exited the mode appears first.
Data and Setting Scrolling
The Band Dbuttons 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.
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