Operation Guide 2858 2859 2860 2861 
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to carefully read this manual and keep it on hand for later reference when necessary.
Expose the watch to bright light to charge its battery before using it.
You can use this watch even as its battery is being charged by exposure to bright light.
•Be sure to read “Battery” of this manual for important
information you need to know when exposing the watch to bright light.
If the display of the watch is blank...
About This Manual
•The operational procedures for Modules 2858, 2859, 2860, and 2861 are identical. All of the illustrations in this manual show Module 2858/2859.
•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.
Sleep indicator
If the sleep indicator (SLEEP ) is displayed, it means the watch’s Power Saving function has turned off the display to conserve power. Power Saving automatically turns off the display and enters a sleep state whenever the watch is left for a certain period where it is dark.
•The initial factory default setting is Power Saving on.
(Light) | (Light) |
Module 2858/2859 | Module 2860/2861 |
| • The watch recovers from the sleep state if you move it to | |
| a | |
Module 2858/2859 | the watch towards your face for reading. | |
* It can take up to two seconds for the display to turn on. | ||
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| • See “Power Saving Function” for more information. |
Module 2860/2861
General Guide
•Press Cto change from mode to mode.
•In any mode, press Lto illuminate the display.
World Time Mode
Timekeeping Mode
Press C.
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Radio-controlled 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.
•In the Timekeeping Mode, press Dto display the Last Signal screen. The Last Signal screen shows the date and time of the last successful time cailbration signal reception.
PM | Day of week | Receive time |
indicator |
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| Press D. | |
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| Month – Day Hour : Minutes Seconds | Receive date |
| Current Time Screen | Last Signal Screen |
•This watch is designed to pick up the time calibration signal transmitted from Rugby, England and the signal from Mainflingen, Germany.
Current Time Setting
This watch automatically adjusts its time setting 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 set your Home City, which is the city where you will normally use the watch. For more information, see “To set your Home City” below.
•When using the watch that is outside of the range of the transmitters in Rugby and Mainflingen, you need to manually adjust the time as required. See “Timekeeping” for information about manual settings.
Time Recorder Mode
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Stopwatch Mode | ▲ | |
Alarm Mode | ||
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Important!
•Normally, your watch should show the correct time as soon as you select your Home City code. 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.
•If you are in an area that does not use Daylight Saving Time (summer time), turn off the DST setting.
•See “Transmitters” for details about the transmitter mode indicator.
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 automatically picks up the time calibration signal five times a day at 0:00 a.m., 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. For more information, see “About Auto Receive”.
•Manual Receive
Manual receive lets you start a time calibration receive operation with the press of a button. For more information, see “To perform manual receive”.
Important!
•Position the watch as shown in the nearby illustration, with its 12 o’clock side facing towards a window. Make sure there are no metal objects nearby.
Resin Band Metal Band
To set your Home City
City code
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Transmitter mode indicator
1.In the Timekeeping Mode, hold down A until the city code setting starts to flash, which indicates the setting screen.
2.Use D(east) and B(west) to select the city code you want to use as your Home City.
•The following are the city codes for major cities in the Western Europe time zones.
LON: London
PAR and BER: Paris, Berlin, Milan, Rome, Amsterdam, Hamburg, Frankfurt, Vienna, Barcelona, Madrid
3.Press Cto display the transmitter mode setting screen.
•If the displayed transmitter mode indicator shows something other than qvtA, use Dto display qvtA before advancing to the next step.
4.Press Atwice to exit the setting screen.
•The first press of A displays the
•The watch should not be on its side or facing the wrong way.
•Proper signal reception can be difficult or even impossible under the conditions listed below.
Inside or | Inside a | Near | Near a | Near high- | Among or |
among | vehicle | household | construction | tension | behind |
buildings |
| appliances or | site, airport, or | power lines | mountains |
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| office | other sources |
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| equipment, | of electrical |
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| or a mobile | noise |
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| phone |
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