Casio 2688, 2638, 2608 User Manual
MO0306-EA
Resin Band
Metal Band
Operation Guide 2608 2638 2688
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.
••
• 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
Newfoundland, Canada.
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...
Sleep indicator
General Guide
• Press C to change from mode to mode.
• In any mode, press L to illuminate the display.
Timekeeping Mode
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
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.
, if you press any button, or if you
*
World Time Mode
▲
About This Manual
• The operational procedures for Modules 2608, 2638 and 2688 are identical. All of
the illustrations in this manual show Module 2608.
• 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.
(Light)
Module 2608
Time Recorder Mode
(Light)
Module 2638
(Light)
Module 2688
▲
Stopwatch Mode
▲
Alarm Mode
▲
Radio-controlled Atomic Timekeeping
PM
Day of week
indicator
Month – Day
Hour : Minutes Seconds
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 outside of the range of the transmitter in Fort Collins, you
need to manually adjust the time as required. See “Timekeeping” for information
about manual settings.
To set your Home City
E/C/M/P indicator
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.
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
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 North America
The term “North America” in this User’s Guide refers to the
*
area that consists of Canada, the continental United States,
and Mexico.
1. In the Timekeeping Mode, hold down A until the city
City code
code 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
North America.
(P (Pacific) indicator):
LAX
Los Angeles, San Francisco, Las Vegas, Seattle,
Vancouver, Tijuana
(M (Mountain) indicator):
DEN
Denver, El Paso, Edmonton, Culiacan
(C (Central) indicator):
CHI
Chicago, Houston, Dallas/Fort Worth, New Orleans,
Winnipeg, Mexico City
(E (Eastern) indicator):
NYC
New York, Detroit, Miami, Boston, Montreal
• Note that this watch does not have a city code that
corresponds to Newfoundland.
3. Press A twice to exit the setting screen.
• The first press of A displays the 12/24-hour setting
screen. Pressing A again exits the setting screen.
.
*
▲
• Auto Receive
With auto receive, the watch automatically picks up the time calibration signal four
times a day at 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 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!
• When getting ready to receive the time calibration signal, 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.
• 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
among
buildings
• Signal reception is normally better at night than during the day.
• Time calibration signal reception takes from two to six minutes, but in some cases it
can take as long as 12 minutes. Take care that you do not perform any button
operations or move the watch during this time.
• Under good reception conditions, signal reception is possible within a radius of
about 2,000 miles (3,000 kilometers) from the Fort Collins transmitter.
Inside a
vehicle
600 miles
Near
household
appliances or
office
equipment,
or a mobile
phone
Near a
construction
site, airport, or
other sources
of electrical
noise
Near hightension
power lines
2,000 miles
Fort Collins
Among or
behind
mountains
1
Operation Guide 2608 2638 2688
• At distances further than about 600 miles (1,000 kilometers) from the transmitter,
signal reception may not be possible during certain times of year or times of day.
Radio interferance may also cause problems with reception.
• See the information under “Signal Receive Troubleshooting” if you experience
problems with time calibration signal reception.
About Auto Receive
When auto receive is turned on, the watch automatically starts to receive the time
calibration signal when the time in the Timekeeping Mode reaches 2:00 a.m., 3:00
a.m., 4:00 a.m., and 5:00 a.m. each day (calibration times).
Note
• The auto receive operation is performed only if the watch is in the Timekeeping
Mode or World Time Mode when one of the calibration times is reached. It is not
performed if a calibration time is reached while an alarm is sounding, or while you
are configuring settings (while settings are flashing on the display).
• Auto receipt of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that the Timekeeping Mode time is set correctly).
Before going to bed for the night, remove the watch from your wrist, and put it in a
location where it can easily receive the signal.
• When auto receive is turned on, the watch receives the calibration signal for two to
six minutes everyday when the Timekeeping Mode time reaches each of the
calibration times. Do not perform any button operation within six minutes before or
after any one of the calibration times. Doing so can interfere with correct calibration.
• Remember that reception of the calibration signal depends on the time kept in the
Timekeeping Mode. The receive operation will be performed whenever the display
shows any one of the calibration times, regardless of whether or not the
Timekeeping Mode time is actually the correct time.
• When two, three, or four receptions are successful, the watch uses the data of the
last reception for calibration. When only one reception is successful, the watch uses
the data of the successful reception.
About the Receiving Indicator
The receiving indicator shows the strength of the calibration signal being received. For
best reception, be sure to keep the watch in a location where signal strength is
strongest.
Modules 2608,
2638, and 2688
Module 2608
Module 2638
Receiving indicator
• Even in an area where signal strength is strong, it takes about 10 seconds for signal
reception to stabilize enough for the receiving indicator to indicate signal strength.
• Use the receiving indicator as a guide for checking signal strength and for finding
the best location for the watch during signal receive operations.
• Following reception of the time calibration signal and calibration of the watch’s time
setting, the Level 4 receiving indicator will remain on the display in all modes. The
Level 4 receiving indicator will not be displayed if signal reception was unsuccessful
or after you adjust the current time setting manually.
• The Level 4 receiving indicator is displayed only when the watch is able to
successfully receive both time and date data. It does not appear when only time
data is received.
• The Level 4 receiving indicator indicates that at least one of the auto calibration
signal receive operations was successful. Note, however, that the Level 4 receiving
indicator is cleared from the display at 3:00 a.m. each day.
To perform manual receive
Receiving indicator
Note
• To interrupt a receive operation and return to the Timekeeping Mode, press D.
• If the receive operation is unsuccessful, the message
for about one or two minutes. After that, the watch returns to the Timekeeping Mode.
• You can also change from the Last Signal or
timekeeping screen by pressing D.
To turn auto receive on and off
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
On/off status
To display the Last Signal screen
In the Timekeeping Mode, press D to display the Last Signal screen (indicated by
GET). The Last Signal screen shows the date and time of the last successful time
calibration signal reception.
PM
indicator
Hour : Minutes Seconds
1. Place the watch on a stable surface so its top (12
o’clock side) is facing towards a window.
2. In the Timekeeping Mode, 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 perform any button
operations or move the watch during this time.
• After signal reception is complete, the display of the
watch changes to the Last Signal screen.
1. In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
2. Press C twice to move the flashing to the auto receive
on/off setting.
3. Press D to toggle auto receive on (ON) and off (OF).
l
l
l
l
l
l
l
l
• If the current Home City setting is a city code that
l
l
l
l
4. Press A twice to exit the setting screen.
• For information about city codes that support signal
receive, see “To set your Home City”.
Day of week
Month – Day
Weak
(Level 1)
ERR appears on the display
ERR screen to the normal
does not support signal receive, “xx” appears in
place of the on/off indicator. This means you cannot
turn auto receive on or off.
Receive time
Press D.
▲
▲
Receive date
Last Signal Screen
Strong
(Level 4)
Signal Receive Troubleshooting
Check the following points whenever you experience problems with calibration signal
reception.
Problem
Cannot perform
manual receive.
Auto receive is
turned on, but
the Level 4
receiving
indicator does
not appear on
the display.
Time setting is
incorrect
following signal
reception.
• For further information, see “Important!” under “Time Calibration Signal Reception”
and “Radio-controlled Atomic Timekeeping Precautions”.
Probable Cause
•
The watch is not in the Timekeeping Mode.
• Your current Home City is not one of the
following city codes:
LAX, DEN, CHI, or NYC.
• You changed the time setting manually.
• The watch was not in the Timekeeping
or World Time Mode, or you performed
some button operation during the auto
receive operation.
•
Even if receive is successful, the Level
4 receiving indicator disappears every
day at 3 am.
• Time data (hour, minutes, seconds) only
was received during the last receive
operation. The Level 4 receiving
indicator appears only when time data
and date data (year, month, day) are
both received.
• If the time is one hour off, the DST
setting may be incorrect.
• The Home City code setting is not
correct for the area where you are using
the watch.
What you should do
• Enter the Timekeeping Mode
and try again.
• Select LAX, DEN, CHI, or
NYC as your Home City.
• Perform manual signal receive
or wait until the next auto
signal receive operation is
performed.
• Check to make sure the
watch is in a location where it
can receive the signal.
• Change the DST setting to
Auto DST.
• Select the correct Home City
code.
World Time
City code
Home city time
Current time in the
selected city code
To view the time for another city code
While in the World Time Mode, press D to scroll through the city codes (time zones)
to the east or B to scroll to the west.
• If the current time shown for a city is wrong, check your Timekeeping Mode time and
Home City settings and make the necessary changes.
To toggle a city code time between Standard Time and Daylight Saving Time
DST indicator
Module 2608
Module 2638
DST indicator
Module 2688
World Time shows the current time in 30 cities (29 time
zones) around the world.
• For full information on city codes, see the “City Code
Table”.
• The current time for all city codes in the World Time
Mode is calculated in accordance with the Greenwich
Mean Time (GMT) differential for each city, based on the
your Home City time setting.
• All of the operations in this section are performed in the
World Time Mode, which you enter by pressing C.
1. In the World Time Mode, use B and D to display the
city code (time zone) whose Standard Time/Daylight
Saving Time setting you want to change.
2. Hold down A to toggle Daylight Saving Time (DST
indicator displayed) and Standard Time (DST indicator
not displayed).
• The DST indicator is on the display whenever you
display a city code for which Daylight Saving Time is
turned on.
• Note that the DST/Standard Time setting affects only the
currently displayed city code. Other city codes are not
affected.
• Daylight Saving Time (DST) advances the time setting
by one hour from Standard Time. Remember that not all
countries or even local areas use Daylight Saving Time.
• The watch will perform a signal receive operation even if
it is in the World Time Mode when a calibration time is
reached. If this happens, the World Time Mode time
settings will be adjusted in accordance with the Home
City time.
Time Recorder
The Time Recorder lets you store up to 30 records of the
Time record number
Recorded date
(Month–Day)
Recorded time
(Hour : Minutes seconds)
current time (month, day, hour, minutes, seconds, and
DST on/off setting) with the touch of a button. One way
you can use the Time Recorder is to record the start time
and the end time of a particular event.
To record a Time Recorder time
In the Timekeeping Mode, hold down B to record the
Home City time (month, day, hour, minutes, seconds, and
DST on/off setting).
• The recorded time flashes for about two seconds, and
then it is assigned a record number. After that, the
Timekeeping Mode screen appears.
• Records are assigned numbers sequentially from
through #30.
• Storing a new time record when there are already 30
records stored in memory automatically deletes record
#01, shifts the remaining records upwards by 1, and
stores the new record as
#30.
#01
2
Loading...