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Operation Guide 2607 2637 2687
1
MO0306-EA
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...
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.
Sleep indicator
About This Manual
• The operational procedures for Modules 2607, 2637 and 2687 are identical. All of
the illustrations in this manual show Module 2607.
• 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.
Module 2607
Module 2637
(Light)
(Light)
Module 2687
(Light)
General Guide
• Press C to change from mode to mode.
• In any mode, press L to illuminate the display.
Stopwatch Mode
Timekeeping Mode
Alarm Mode
▲
▲
▲
Press C.
▲
World Time Mode
Time Recorder Mode
▲
Timekeeping
Use the Timekeeping Mode to set and view the current time and date.
• The watch is equipped with a Time Recorder feature that lets you record the current
Home City time (month, day, hour, minutes, seconds, and DST on/off setting) with
the touch of a button. See “To record a Time Recorder time” for more information.
• Pressing D displays the Last Signal screen (date and time that the time calibration
signal was last received) in the Timekeeping Mode.
Last Signal Screen
▲
Press D.
Day of week
Receive time
Month – Day
Hour : Minutes Seconds
PM
indicator
▲
Receive date
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.
• Before using the watch in Western Europe, first use the procedure under “Setting Up
the Watch for Use in Western Europe” to set the time in accordance with a time
calibration signal.
• Note that after you set your Home City (the city where you normally use the watch)
code, you must also turn on the watch’s time calibration signal receiver if you want to
enable auto time calibration. See “About Auto Receive” for more information.
• See “Setting the Time and Date Manually” for information about manual settings.
Setting Up the Watch for Use in Western Europe
You need to make the following three settings before using this watch in Western
Europe. The following provides a general overview of the setting procedure. For full
details, see “Setting the Time and Date Manually” and “Time Calibration Signal
Reception”.
• Specify the city code for your Home City (the city where you will normally use the
watch).
• Select the auto Daylight Saving Time (summer time) setting.
• Perform the manual time calibration signal receive operation to set the current time.
To set up the watch for use in Western Europe
1. In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
2. Use D(+) and B(–) 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.
City code
BER and PAR: Berlin, Paris, Milan, Rome,
Amsterdam, Hamburg,
Frankfurt, Vienna
LON: London
3. Press C and the Daylight Saving Time (summer time)
setting screen appears.
4. Use D to select AUTO (auto DST).
• Auto DST specifies auto switching between Daylight
Saving Time (DST) and Standard Time.
5. Press A twice to exit the setting screen.
6. Hold down D for about two seconds until the watch
beeps.
• Release D and the message RC! appears to indicate
that signal reception has started.
• Time calibration signal reception takes from two to six
minutes. Take care that you do not move the watch
during this time.
Receiving indicator
• When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, and place it near a window in a location where there
are no nearby metal objects.
• The watch should not be on its side or facing the wrong way.
• See the information under “Time Calibration Signal Reception Precautions” if you
experience problems with time calibration signal reception.
Resin Band
Metal Band
• After signal reception is complete, the display of the watch changes to the Last
Signal screen.
Time Calibration Signal Reception
This watch is designed to pick up a time calibration signal and update its time setting
in accordance with the signal. There are two different methods you can use to receive
the signal: Auto Receive and Manual Receive. With Auto Receive, the watch
automatically receives the calibration signal four times each day and makes
appropriate adjustments. With Manual Receive, you perform a specific button
operation to receive the calibration signal.
• This watch is able to receive the time calibration signal
transmitted from Mainflingen, Germany (located 25
kilometers southeast of Frankfurt). Signal reception is
possible within the area represented by a circle with a
radius of about 1000 kilometers.
• At distances further than about 500 kilometers, the
signal may become weak and reception may be
impossible under certain conditions.
• Signal reception may be poor in the shaded area on the
map, even though it is within 1,000 kilometers of the
signal transmitter.
Frankfurt
Note
• If you are using the time calibration signal to set the time for this watch, be sure to
correctly set your Home City. Otherwise, there is the chance that the watch will not
set the correct time. See “Setting the Time and Date Manually” for details.
• Note that signal reception is possible only when the watch is within range of a time
calibration signal transmitter, and BER, PAR, LON, or ATH is selected as the Home
City code.
• See “City Code Table” for a complete list of available city codes.
• The current time setting in accordance with the time calibration signal takes priority
over any time settings you make.
• Auto receive is turned on when the watch is shipped from the factory.
• See the information under “Time Calibration Signal Reception Precautions” if you
experience problems with time calibration signal reception.