MO0512-EA
Operation Guide 4383
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to read this manual carefully.
•This watch does not have a time zone that corresponds to the Greenwich Mean Time differential of
Keep the watch exposed to bright light
Bright light | The electricity generated by the solar cell of the watch is |
If the analog hands aren’t moving...
If the analog hands aren’t moving, it means that the power saving mode has stopped them to save battery power.
•See “Power Saving” for more information.
•The hands also stop whenever the battery level reaches Level 3.
About This Manual
l | l | l | l | l | l | l | l | l | l | l | stored by a |
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where it is not exposed to light causes the battery to run down. Make sure the watch is exposed to light as much as possible.
•When you are not wearing the watch on your wrist,
Solar cell | position the face so it is pointed at a source of bright |
| light. |
| • You should try to keep the watch outside of your sleeve |
| as much as possible. Even if the face of the watch is |
| blocked only partially from light, charging will be reduced |
| significantly. |
• The watch continues to operate, even when it is not exposed to light. Leaving the watch in the dark can cause the battery to run down, which will cause some watch functions to be disabled. If the battery goes dead, you will have to
Minute hand
Hour hand
30
Date
Second hand
•Button operations are indicated using the letters shown in the illustration.
•Each section of this manual provides you with the information you need to perform operations in each mode. Further details and technical information can be found in the “Reference” section.
Battery charges in the light.
Solar cell | Bright light | Electrical |
(Converts light to | ||
electrical power.) | energy | |
| LEVEL 1 | All |
| functions | |
| LEVEL 2 | |
| enabled. | |
| Charge LEVEL 3 |
|
| Rechargeable battery | |
Battery discharges in the dark.
All functions disabled,
except for analog timekeeping.
LEVEL 1
Dis- LEVEL 2
charge LEVEL 3 All 
functions
disabled.
•The actual level at which some functions are disabled depends on the watch model.
•Be sure to read “Power Supply” for important information you need to know when exposing the watch to bright light.
General Guide
•Press Bto change from mode to mode.
Timekeeping Mode | Receive Result Mode |
| Press B. |
| ▲ |
30 | 30 |
▲ |
|
Radio-controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting accordingly. The time calibration signal includes both Standard Time and Daylight Saving Time (summer time) data.
•This watch is designed to pick up the time calibration signal transmitted in the United States (Fort Collins, Colorado).
•The U.S. time calibration signal can be picked up by the watch while in North America*.
*The term “North America” in this manual refers to the area that consists of Canada, the continental United States, and Mexico.
Current Time Setting
This watch adjusts its time setting automatically in accordance with a time calibration signal. You can also perform a manual procedure to set the time and date, when necessary.
•The first thing you should do after purchasing this watch is to specify your Home Time Zone, which is the time zone where you will normally use the watch. For more information, see “To specify your Home Time Zone” below.
•When using the watch outside the range of the U.S. time signal transmitter, you have to adjust the current time setting manually as required. See “Timekeeping” for more information about manual time settings.
To specify your Home Time Zone
Home Position
Adjustment Mode
▲
30 
3. Press Aeight times to exit the setting mode.
•The watch will also return to the Timekeeping Mode if you do not perform any operation for about two or three minutes.
•Normally, your watch should show the correct time as soon as you specify your Home Time Zone. If it does not, it should adjust automatically after the next auto receive operation (in the middle of the night). You can also perform manual receive or you can set the time manually.
•Even if the time calibration signal is received correctly, there are some times when the analog hands may not indicate the correct time. If this happens, use the procedures under “Adjusting the Home Positions” to check the home positions of the hands, and make adjustments as required.
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal: auto receive and manual receive.
•Auto Receive
With auto receive, the watch receives the time calibration signal automatically up to six times a day. When any auto receive is successful, the remaining auto receive operations are not performed. For more information, see “About Auto Receive”.
•Manual Receive
Manual receive lets you start a time calibration receive operation with the press of a
| 30 |
GMT | GMT differential |
differential | value |
value |
|
GMT differential | ||
value | ||
|
1.In the Timekeeping Mode, hold down Afor about five seconds until the second hand moves to the currently selected GMT differential value and stops. This is the setting mode.
•The GMT differential value indicates the time difference in hours between Greenwich Mean Time and the currently selected time zone.
2.Press B to select the time zone you want to use as your Home Time Zone.
GMT
GMT
GMT
GMT
button. For more information, see “To perform manual receive”.
Important!
•When getting ready to receive the time calibration signal, position the watch as shown in the nearby illustration, with its 9 o’clock side facing towards a window. Make sure there are no metal objects nearby.
9 o’clock 
or
•The watch should not be facing the wrong way.
•Note that this watch does not have a city code that corresponds to Newfoundland.
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