Operation Guide 2608 2638 2688
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
• This watch does not have a time zone that corresponds to the Greenwich
Mean Time differential of –3.5 hours. Because of this, the radio-controlled
timekeeping and World Time functions will not display the correct time for
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
• 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...
If the sleep indicator (S /SLEEP ) is on the display, it
means that the display is blank because the watch’s
Power Saving function has shut it to conserve power.
Power Saving automatically turns off the display and
enters a sleep state whenever your watch is left in an
area where it is dark for a certain period.
• The initial factory default setting is Power Saving on.
• The watch recovers from the sleep state if you move it
to a well-lit area*, if you press any button, or if you
angle the watch towards your face for reading.
* It can take up to two seconds for the display to turn on.
• See “Power Saving Function” for more information.
• Press C to change from mode to mode.
• In any mode, press L to illuminate the display.
World Time Mode
Time Recorder Mode
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 from Fort Collins, Colorado (USA).
Reception is possible within N