Operation Guide 3019 3039
Important!
•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. Make sure that the watch is exposed to bright light whenever possible.
•This watch uses a special rechargeable battery to store power produced by the solar cell, so regular battery replacement is not required. However, after very long use, the rechargeable battery may lose its ability to achieve a full charge. If you experience problems getting the special rechargeable battery to charge fully, contact your dealer or CASIO distributor about having it replaced.
•Never try to remove or replace the watch’s special battery yourself. Use of the wrong type of battery can damage the watch.
•The current time and all other settings return to their initial factory defaults whenever battery power drops to Level 4 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 and Recover Indicator
The battery power indicator shows you the current power level of the rechargeable battery.
Recover indicator | Level | Battery Power Indicator | Function Status | ||||||||
1 | (No indicator) | All functions enabled. | |||||||||
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| ll l | l | l ll | Auto and manual receive, | |||
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| 2 | ll |
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| beeper tone, and | |
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| l l | l | l l | illumination disabled. | ||
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| l l | l | l | ll | Auto and manual receive, | |
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| 3 | ll |
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| l | beeper tone, illumination, | |
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| l l | l l l | and display disabled. | |||
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| 4 |
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| All functions, including | |
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| timekeeping, disabled and | ||
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| initialized. | |
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•The LOW indicator flashes on the Timekeeping Mode Time/Date screen whenever the battery is at Level 2. You cannot change from the Time/Date screen to the dual time screen while the battery is at Level 2.
•The LOW indicator at Level 2 and the flashing charge indicator (CHG) at Level 3 tell you that battery power is very low, and that exposure to bright light for charging is required as soon as possible.
•At Level 4, 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 time and date, after the battery reaches Level 3 (indicated by the flashing charge indicator) from Level 4. You will not be able to configure any of the other settings until the battery reaches Level 1 after dropping to Level 4.
•The watch’s Home City code setting will change automatically to TYO (Tokyo) whenever the battery drops to Level 4. With this Home City code setting, the watch is configured to receive the time calibration signals of Japan. If you are using the watch in North America or Europe, you will need to change the Home City code setting to match your location whenever the battery drops to Level 4.
•If you use the light or alarms a number of times during a short period, the recover indicator (RECOV) appears and the following operations become disabled until battery power recovers.
Illumination Beeper tone
Time calibration signal reception
After some time, battery power will recover and the recover indicator 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 9 months.
•The following table shows the amount of time the watch needs to be exposed to light each day in order to generate enough power for normal daily operations.
Exposure Level (Brightness) | Approximate Exposure Time |
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Outdoor Sunlight (50,000 lux) | 8 minutes |
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Sunlight Through a Window (10,000 lux) | 30 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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•Since these are the specs, we can include all the technical details.
•Display on 18 hours per day, sleep state 6 hours per day
•1 illumination operation (1.5 seconds) per day
•10 seconds of alarm operation per day
•10 minutes of signal reception per day
•Stable operation is promoted by frequent exposure to light.
Recovery Times
The table below shows the amount exposure that is required to take the battery from one level to the next.
Exposure Level | Approximate Exposure Time |
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(Brightness) |
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Level 4 |
| Level 3 |
| Level 2 |
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| Level 1 | |||
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Outdoor Sunlight (50,000 lux) |
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| 2 hours |
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| 39 hours | |
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Sunlight Through a Window |
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| 5 hours |
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| 146 hours | |
(10,000 lux) |
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Daylight Through a Window |
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| 8 hours |
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| 236 hours | |
on a Cloudy Day (5,000 lux) |
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Indoor Fluorescent Lighting |
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| 86 hours |
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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.
Timekeeping
Use the Timekeeping Mode to set and view the current time and date. The Timekeeping Mode can be used to display the current time in your Home City (Home Time) and in one more time zone (Zone 2 Time).
•Pressing Din the Timekeeping Mode will toggle between the Time/Date screen and the Dual Time screen.
Dual Time Screen
Time/Date Screen | Zone 2 time | Zone 2 time | ||
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Day of week | Month – Day | city code | (Hour : Minutes) | |
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PM indicator | ▲ | ▲ |
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Home time | Seconds | Home time | Home time | |
(Hour : Minutes) | (Hour : Minutes) | city code | ||
•You can also use the Timekeeping Mode setting screen to specify the
•All of the operations in this section are performed in the Timekeeping Mode, which you enter by pressing C.
Dual Time
The Timekeeping Mode can be used to display the current time in your Home City (Home Time) and in one more time zone (Zone 2 Time).
•The minute and second setting of the Home Time and Zone 2 Time are synchronized with each other. If the time setting of either the Home Time or the Zone 2 Time is changed manually or by a signal receive operation will cause the other time setting to be changed accordingly.
•You can change the time and city code setting only of the time that is currently in the Home Time position on the Dual Time screen. You cannot change the settings of Zone 2 Time position. If you want to change the time or city code setting of the Zone 2 Time, first move it to the Home Time position. After making the changes, you can move the time back to the Zone 2 Time position.
•Alarm operations are performed in accordance with the time that is currently in the Home Time position on the Dual Time screen.
To switch the Dual Time screen times between the Home Time and Zone 2 Time positions
In the Timekeeping Mode, hold down Dfor about three seconds until the two times switch positions. Both of the city codes will flash for about two seconds after they switch positions.
Dual Time Screen | Zone 2 time |
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Zone 2 time | Hold down D. | city code | |
city code |
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▲ | ▲ |
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Home time | Home time |
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Home time | city code | ||
(Hour : Minutes) | city code |
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•After switching the positions of the Home Time and Zone 2 Time on the Dual Time screen, pressing D again will display the Time/Date screen. The Time/Date screen will show the time and date for the city code whose time was in the Home Time location on the Dual Time screen.
Setting the Time and Date
Make sure you select your Home City code before you change the current time and date settings. World Time Mode times are all displayed in accordance with the Timekeeping Mode settings. Because of this, World Time Mode times will not be correct if you do not select the proper Home City code before setting the time and date in the Timekeeping Mode.
To set the time and date
1. On the Timekeeping Mode Dual Time screen, make
City code
sure the time you want to change is in the Home Time position on the display.
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| 2. Press A so the city code of the Home Time is flashing. | ||||||||||||||||
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| sequence shown below to select other settings. | ||||||||||||||
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| City Code |
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| DST |
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| Power |
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| Saving |
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