Operation Guide 5178
Hour hand Minute hand
30
4.Press Cto change to hour and minute hand correction.
•This will cause the hour and minute hands
•Home Positions
Hour hand: 12 o’clock
Minute hand: 12 o’clock
5.Use D (+) and B
•The bottom dial hand indicates the current hour on a
Minute hand
30
Hour hand
Left dial hand
30
6.Press Cto advance to change to right dial
•This will cause the hour and minute hands of the right dial to move to their home positions.
•Home Positions
Hour hand: 24 o’clock
Minute hand: 24 o’clock
7.Use D (+) and B
8.Press Cto change to left dial correction.
•This causes the left dial hand to move to its home position.
•Home Position
Left Dial: 12 o’clock
9.Use D (+) and B
1
Day
10.Press C to change to day correction.
•This causes the day to move to its home position.
•Home Position Day: 1
11.Use D (+) and B
•Each press of Dor Bmoves the day indicator very slightly. Keep pressing the applicable button until the day is aligned the way you want.
12.Press A to exit home position correction and return to normal timekeeping.
•If you press Cinstead of A, the watch will return to step 1 (second hand home position adjustment) of this procedure.
Check to make sure that the time, day, and day of the week are being indicated correctly.
Power Supply
This watch is equipped with a solar cell and a special 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 face is | Solar cell |
pointing at a light source. |
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• The illustration shows how to position |
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a watch with a resin band. |
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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. | 30 |
•You should try to keep the watch outside of your sleeve as much as possible. Even if the face of the watch is blocked from light only partially, charging will be reduced significantly.
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.
•The special rechargeable (secondary) battery used by your watch is not intended to be removed or replaced by you. Use of a rechargeable battery other than the special one specified for this watch can damage the watch.
•The current time and all other settings return to their initial factory defaults whenever the watch is left uncharged for about one week after battery power drops to Level 3, and when you have the battery replaced.
•Keep the watch in an area normally exposed to bright light when storing it for long periods. This helps to keep the rechargeable battery from going dead.
•When battery power is at Level 2, time calibration signal reception is disabled.
•When power drops to Level 3, all functions will be disabled but the watch will continue to keep time internally for about one week. If you recharge the battery sufficiently during this period, the analog hands will move automatically to the correct setting and normal timekeeping will resume. If the watch is left uncharged for about one week after battery power drops to Level 3, the current time and all other settings return to their initial factory defaults.
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.
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
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 3 |
| Level 2 |
| Level 1 | ||
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Outdoor sunlight (50,000 lux) | 2 hours |
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| 24 hours | ||
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Sunlight through a window | 6 hours |
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| 89 hours | ||
(10,000 lux) |
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Daylight through a window on | 9 hours |
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| 144 hours | ||
a cloudy day (5,000 lux) |
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Indoor fluorescent lighting | 97 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.
Battery Power Levels
The movement of the analog hands indicates the current battery power level.
Level | Hand Movement | Function Status |
1 | Normal. | All functions enabled. |
2 | • Second hand jumps | Time calibration signal |
| every 2 seconds. | reception disabled. |
30 | • Day changes to home |
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| position. |
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3 | • Second hand stopped. | All functions disabled. |
Jumps two seconds | • Hour and minute hands |
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| stopped at 12 o’clock. |
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•The second hand jumping every two seconds (Level 2) indicates that battery power is quite low. Expose the watch to light as soon as possible to charge the battery.
Charging Guide
After a full charge, timekeeping remains enabled for up to about five 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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•For details about the battery operating time and daily operating conditions, see the “Power Supply” section of the Specifications (page
•Stable operation is promoted by frequent charging.
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.
Auto Return Features
•If you do not perform any operation for about two or three minutes in the current time setting mode, or in the hand/day home position correction mode, the watch will return to the Timekeeping Mode automatically.
•If you do not perform any operation for about two or three minutes while a setting mode is selected, the watch will exit the setting mode automatically.
High-Speed Movement
•In most cases when configuring settings, holding down a button will start
•