Casio 2406 User manual

Operation Guide 2406 2583 2587
1
MO0308-EC
A
B
C
D
L
(Light)
Module 2406 Modules 2583, 2587
A
B
C
D
L
(Light)
About This Manual
•The operational procedures for Modules 2406, 2583 and 2587 are identical. All of
the illustrations in this manual show Module 2406.
•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.
•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 will not display the correct time for Newfoundland, Canada.
A
B
C
D
L
•If you leave the watch in Alarm, Date Alert, or Time Zone Mode for about 10 seconds
without performing any operation, it automatically returns to the Timekeeping Mode.
Time Zone Mode
Timekeeping Mode
Date Alert Mode
▲
▲ ▲
Stopwatch Mode
▲
Alarm Mode
▲
Press D.
General Guide
•Press Dto change from mode to mode.
•In any mode, press Lto illuminate the display.
A
B
C
D
Time zone indicator
(E/C/M/P)
Time zone differential
(Indicates –5h)
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 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.
Important!
Before using the watch for the first time after purchasing it, use the procedure under
“To specify your time zone” to specify your time zone, and then perform the procedure
under “To trigger a calibration signal receive operation manually”.
Setting the Time and Date
There are three different methods you can use to set the watch’s time and date.
•Auto receive of the time calibration signal
•Manual receive of the time calibration signal
•Manual setting without using the time calibration signal
No matter which method you use, you must specify your time zone first.
Specifying Your Time Zone
Use the Time Zone Mode to specify your current time zone. If you move to a different
time zone either inside or outside of North America, simply change the time zone
setting and the watch adjusts its current time and date settings accordingly.
•See the “Time Zone Table” for information about time zones and applicable cities.
To specify your time zone
1. Use Dto enter the Time Zone Mode.
2. Hold down Buntil the current time zone differential
value starts to flash, which indicates the setting screen.
•The time zone differential value indicates the number
of hours difference in time between the currently
selected time zone and UTC in Greenwich, England.
On-screen indicators also indicate North American
time zones as shown in the table below.
•Note that this watch does not have a time zone that
corresponds to Newfoundland.
3. Use A(+) and C(–) to change the time zone differential value.
4. Press Bto exit the setting screen.
•In a U.S. area that does not use DST, select the time zone to the west of the time
zone where you are. If you are in a Mountain Time Zone area that does not use
DST, for example, select the Pacific Time Zone during the Daylight Saving Time
period.
Time Zone Indicator
E(Eastern)
C(Central)
M(Mountain)
P(Pacific)
Time Zone Differential
–5h
–6h
–7h
–8h
Major cities in same time zone
NEW YORK, MONTREAL, DETROIT,
MIAMI, BOSTON
CHICAGO, HOUSTON, DALLAS/
FORT WORTH, NEW ORLEANS,
MEXICO CITY, WINNIPEG
DENVER, EL PASO,
EDMONTON,CULIACAN
LOS ANGELES, SAN FRANCISCO,
LAS VEGAS, VANCOUVER,
SEATTLE, TIJUANA
Time Calibration Signal Reception
Removing the watch from your wrist and positioning it as shown in the illustrations
nearby helps to optimize signal reception.
•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.
Note
See “Time Calibration Signal Reception Precautions” for important information about
time calibration signal reception.
To trigger a calibration signal receive operation manually
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 Cfor about two
seconds, until the receive indicator starts to flash, which
indicates that signal reception has started.
•Signal reception takes from two to five minutes. Take
care that you do not move the watch during this time.
•The receive indicator stops flashing and remains on the
display when signal reception is complete. The receive
indicator remains on the display for three days after a
successful signal reception. The receive indicator does
not appear if signal reception is unsuccessful for some
reason.
•To interrupt a receive operation, hold down C.
Resin Band Metal Band
C
Receive indicator
C
Module 2406
Modules 2583, 2587
Receive indicator
To use calibration signal auto receive
The watch automatically starts to receive the time calibration signal when the
Timekeeping Mode time reaches 1:00 AM each day (calibration time). Note that the
auto receive operation is performed everyday no matter what mode the watch is in,
and reception continues even if you perform some other operation after it starts. The
receive indicator is not displayed during auto receive.
•Auto receive is performed at 1:00 AM, 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.
•Remember that reception of the calibration signal depends on the Timekeeping
Mode time. The receive operation will be performed whenever the Timekeeping
Mode time is 1:00 AM, regardless of whether or not the displayed time is actually the
correct time.
Important!
The watch has a digital tuning function called “automatic gain control,” which achieves
best timekeeping accuracy when there are a large number of successful calibration
signal receptions. Because of this, we recommend that you always allow the watch to
perform automatic calibration.

Operation Guide 2406 2583 2587
2
To set the time and date manually
Important!
The receive indicator remains on the display for about three days after successful
receipt of the time calibration signal. Note that you cannot manually change the time
setting while the receive indicator is on the display.
1. Make sure that the current time zone setting is the time
zone for which you want to set the time and date.
2. In the Timekeeping Mode, hold down Buntil the
current time starts to flash on the display, which
indicates the time setting screen.
•If you want to change the date setting only without
changing the time setting, skip to step 4.
3. Use A(+) and C(–) to change the time setting.
•If you want to register your time setting without
changing the date setting, press Bhere to exit the
setting screen.
4. Press Dto advance to the date setting screen, which
is indicated by the date flashing on the display.
5. Use A(+) and C(–) to change the date setting.
•Pressing Dchanges back to the time setting screen
in step 2.
6. Press Bto exit the setting screen.
A
B
C
D
Time setting screen
A
B
C
D
Date setting screen
Switching between Standard Time and Daylight Saving Time
The time calibration signal sent from Fort Collins includes Standard Time and Daylight
Saving Time information. If you are in a time zone within North America where
Daylight Saving Time is used, you do not need to make any adjustments to switch
between Standard Time and Daylight Saving Time.
When you are in a time zone outside of North America, you can use the following
procedure to turn on Daylight Saving and advance the current time by one hour, when
necessary.
•Note that not all countries or local areas use Daylight Saving Time.
•If the watch receives a time calibration signal, the time is adjusted in accordance
with the time calibration signal data, regardless of the current DST on/off setting. If
you are in a U.S. area that does not use Daylight Saving Time, you need to use the
procedure under “To specify your time zone”to select the time zone to the west of
the time zone where you are. If you are in the Mountain Time Zone in an area that
does not use Daylight Saving Time, for example, select the Pacific Time Zone during
the Daylight Saving Time period.
To switch between Standard Time and Daylight Saving Time
1. Use Dto enter the Time Zone Mode.
2. Hold down Buntil the current time zone differential
value starts to flash, which indicates the setting screen.
3. Press Dto display the DST setting screen.
4. Press Aor Cto toggle between Daylight Saving Time
(ON) and Standard Time (OFF).
•The DST indicator is on the display while Daylight
Saving Time is turned on.
5. Press Bto exit the setting screen.
•The Daylight Saving Time setting affects the currently
selected time zone only.
•The Daylight Saving Time setting does not affect UTC.
Timekeeping Mode Screens
You can select one of two different screens for viewing the current time in the
Timekeeping Mode: Home Time and Date screen, or Home Time and UTC (Universal
Time Coordinated) screen. Press Bto toggle between the two screen formats.
[Module 2406]
A
B
C
D
DST indicator
[Modules 2583, 2587]
B
▲
▲
Home Time and Date Screen Home Time and UTC Screen
Day of week
Hour : Minutes
PM indicator Seconds
Month –Day
Press B.
UTC
•Changing the Home Time setting also causes UTC to change accordingly. Time
zone and DST ON/OFF settings do not have any affect on the UTC.
B
Home Time and Date Screen Home Time and UTC Screen
▲
▲
Day of week
Hour : Minutes
PM indicator Seconds
Month –Day
Press B.
UTC
Alarm
You can set a Daily Alarm that sounds at the same time each day, while it is turned on.
•Alarm settings are available in the Alarm Mode, which you enter by pressing D.
To set the alarm time
1. In the Alarm Mode, hold down Buntil the alarm time
starts to flash, which indicates the setting screen.
•The alarm turns on, which is indicated by the
appearance of ON, whenever you display the alarm
setting screen.
2. While the alarm time is flashing, use A(+) and C(–)
to change it.
•When setting the alarm, take care to set the time
correctly as a.m. (no indicator) or p.m. (Module 2406:
PM; Modules 2583, 2587: P).
3. Press Bto exit the setting screen.
Alarm Operation
The alarm sounds at the preset time for about 30 seconds, or until you stop it by
pressing any button.
Important!
An ongoing receive operation (auto or manual) is immediately canceled if an alarm
sounds. If you need to set an alarm time in the range of 1:00 AM to 1:15 AM, we
recommend that you trigger a receive operation manually after the alarm sounds.
To turn the alarm on and off
In the Alarm Mode, press Cto turn the alarm on (ON displayed) and off (OFF
displayed).
•The alarm on indicator (Module 2406: ; Modules 2583, 2587: ) is shown on
the display in all modes while the alarm is turned on.
Date Alert
The Date Alert Mode helps you to remember an important date. After you set an alert
date (month and day), the watch displays a flashing indicator (Module 2406: TODAY!;
Modules 2583, 2587: ) for 24 hours after that date arrives.
•Note that Date Alert is always on and cannot be turned off. The initial default alert
date is December 24.
To set the alert date
1. Use Dto enter the Date Alert Mode.
2. Hold down Buntil the alert date starts to flash, which
indicates the setting screen.
3. Use A(+) and C(–) to change the setting.
4. Press Bto exit the setting screen.
A
B
C
D
Alarm on indicator
Alarm time (Hour : Minutes)
ON/OFF status
A
B
C
D
Alert date
TODAY indicator
Stopwatch
The stopwatch lets you measure elapsed time, lap times,
split times, and two finishes.
•The display range of the stopwatch is 99 hours,
59 minutes, 59.99 seconds.
•The stopwatch measurement operation continues until
you stop it or until it reaches 99:59' 59.99" (at which time
the display resets to all zeros).
•The stopwatch measurement operation continues even
if you exit the Stopwatch Mode.
•All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing D.
A
B
C
D
Hours Minutes
Seconds
1/100 second
SP indicator
To measure elapsed time
1. Press Ato start the stopwatch.
2. Press Aagain to stop the stopwatch.
•You can resume the measurement operation by pressing A.
3. Press Cto clear the stopwatch to all zeros.
To measure lap times
1. When the stopwatch display shows all zeros, use Cto display the lap time screen
(indicated by LA).
2. Press Ato start a time measurement.
3. Press Cwhen you want to freeze the first lap time on the display.
•Though the lap time is frozen on the display, timing of the next lap continues
internally.
4. Press Cagain to switch back to the ongoing timing of the next lap.
•You can repeat steps 3 and 4 as many times as you want.
5. Press Awhen you want to stop the lap time measurement.
6. Press Cto clear the stopwatch to all zeros.
To measure split times
1. When the stopwatch display shows all zeros, use Cto display the split time screen
(indicated by SP).
2. Press Ato start a time measurement.
3. Press Cwhen you want to freeze the first split time on the display.
•Though the split time is frozen on the display, timing continues internally.
4. Press Cagain to switch back to the split time measurement.
•You can repeat steps 3 and 4 as many times as you want.
5. Press Ato stop the split time measurement.
6. Press Cto clear the stopwatch to all zeros.
To determine the time of 1st and 2nd place finishers
1. When the stopwatch display shows all zeros, press Cto display the split time
screen (indicated by SP).
2. Press Ato start a time measurement.
3. Press Cwhen the first finisher crosses the finish line.
•This causes the time of the first finisher to be frozen on the display, while elapsed
time measurement continues internally.
4. Press Awhen the second finisher crosses the finish line.
5. Press Cto display the time of the second finisher.
6. Press Cto clear the stopwatch to all zeros.

Operation Guide 2406 2583 2587
3
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto Return Features
•If you leave the watch in Alarm, Date Alert, or Time Zone Mode for about 10 seconds
without performing any operation, it automatically returns to the Timekeeping Mode.
•If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch automatically saves any settings you
have made up to that point and exits the setting screen.
Scrolling
The Aand Cbuttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Timekeeping
•Pressing Aor Cwhile setting the time in the Timekeeping Mode resets the
second’s count to zero.
•The second’s count is restarted when you press Dto advance to the date setting
screen or Bto exit the setting screen.
•The day of the week is automatically displayed in accordance with the date (year,
month, and day) settings.
•The year can be set in the range of 1997 to 2096.
•The watch’s built-in full automatic calendar automatically makes allowances for
different month lengths and leap years. Once you set the date, there should be no
reason to change it except after you have the watch’s battery replaced.
•Home Time is displayed in 12-hour format, while UTC is always displayed in 24-hour
format.
•The PM (Module 2406: PM; Modules 2583, 2587: P) indicator appears to the left of
the hour digits for times in the range of noon to 11:59 p.m. and no indicator appears
to the left of the hour digits for times in the range of midnight to 11:59 a.m.
UTC
The letters “UTC”stands for “Universal Time Coordinated,”which is the world-wide
scientific standard of timekeeping. It is based upon carefully maintained atomic
(cesium) clocks that keep accurate to within microseconds. Leap seconds are added
or subtracted as necessary to keep UTC in sync with the Earth’s rotation. The
reference point for UTC is Greenwich, England.
Time Calibration Signal Reception Precautions
•This watch receives the time calibration signal (Call
Sign: WWVB) transmitted from Fort Collins, Colorado.
Signal reception is possible within a radius of about
2,000 miles (3,000 kilometers) from the Fort Collins
transmitter.
•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 interference may also cause problems with
reception.
•The current time setting in accordance with the time calibration signal takes priority
over any time settings you make.
•The watch is designed to automatically update the date and day of the week for the
period January 1, 1997 to December 31, 2096. Setting of the date by the time
calibration signal cannot be performed starting from January 1, 2097.
•This watch can receive signals that differentiate between leap years and non-leap
years.
•Reception stops if an alarm starts to sound while the signal is being received.
•Even when the watch is within the reception range, signal reception is impossible if
the signal is blocked by mountains or other geological formations between the watch
and signal source.
•Signal reception is affected by weather, atmospheric conditions, and seasonal
changes.
•The time calibration signal is bounced off the ionosphere. Because of this, such
factors as changes in the reflectivity of the ionosphere, as well as movement of the
ionosphere to higher altitudes due to seasonal atmospheric changes or the time of
day may change the reception range of the signal and make reception temporarily
impossible.
•Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.
•Think of the watch as acting like a TV or radio when it is receiving the calibration
signal. When receiving indoors, move to a location as near as possible to a window.
Proper signal reception can be difficult or even impossible under the conditions
listed below.
Near TVs, refrigerators, computers, or other household appliances
Far away from broadcasting stations among ferro-concrete structures or near
mountains
Underground, in tunnels or in ferro-concrete buildings
Near high-tension wires, neon signs, or radio stations with interfering frequencies
Near railroads, highways or airports
In trains or cars
•Radio interference can make signal reception impossible.
•Strong electrostatic charge can result in the wrong time being set.
•If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time within ±20 seconds a month at normal temperature.
Backlight Precautions
The backlight uses an EL (electro-luminescent) panel that causes the entire display to
glow for easy reading in the dark. In any mode, press Lto illuminate the display for
about three seconds.
•The electro-luminescent panel that provides illumination loses power after very long
use.
•The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
•The watch may emit an audible sound whenever the display is illuminated. This is
due to vibration of the EL panel used for illumination, and does not indicate
malfunction.
•The backlight automatically turns off whenever an alarm sounds.
•Frequent use of the backlight shortens the battery life.
Low Power Battery Precautions
•The indicator ( ) on the display indicates normal battery power. The indicator
changes to a flashing when battery power is low.
•Though backlight, alarm, and signal receive operations are possible when the
indicator ( ) is flashing on the display, you should avoid performing these operations
because they require high amounts of power. Have the battery replaced by the store
or dealer where you purchased the watch as soon as possible.
Fort Collins
2,000 miles
600 miles
Time Zone Table
–12h
–11h
–10h
–9h
–8h
–7h
–6h
–5h
–4h
–3h
–2h
–1h
0h
1h
2h
3h
4h
5h
6h
7h
8h
9h
10h
11h
12h
PAGO PAGO
HONOLULU, PAPEETE
ANCHORAGE, NOME
LOS ANGELES, SAN FRANCISCO, LAS VEGAS, VANCOUVER,
SEATTLE, DAWSON CITY, TIJUANA
DENVER, EL PASO, EDMONTON, CULIACAN
CHICAGO, HOUSTON, DALLAS/FORT WORTH, NEW ORLEANS,
MEXICO CITY, WINNIPEG
NEW YORK, MONTREAL, DETROIT, MIAMI, BOSTON, PANAMA CITY,
HAVANA, LIMA, BOGOTA
CARACAS, LA PAZ, SANTIAGO, PORT OF SPAIN
RIO DE JANEIRO, SAO PAULO, BUENOS AIRES, BRASILIA,
MONTEVIDEO
PRAIA
LONDON, DUBLIN, LISBON, CASABLANCA, DAKAR, ABIDJAN
BERLIN, PARIS, MILAN, ROME, MADRID, AMSTERDAM, ALGIERS,
HAMBURG, FRANKFURT, VIENNA, STOCKHOLM
CAIRO, JERUSALEM, ATHENS, HELSINKI, ISTANBUL, BEIRUT,
DAMASCUS, CAPE TOWN
JEDDAH, KUWAIT, RIYADH, ADEN, ADDIS ABABA, NAIROBI,
MOSCOW
DUBAI, ABU DHABI, MUSCAT
KARACHI, MALE
DHAKA, COLOMBO
BANGKOK, JAKARTA, PHNOM PENH, HANOI, VIENTIANE
HONG KONG, SINGAPORE, KUALA LUMPUR, BEIJING, TAIPEI,
MANILA, PERTH, ULAANBAATAR
TOKYO, SEOUL, PYONGYANG
SYDNEY, MELBOURNE, GUAM, RABAUL
NOUMEA, PORT VILA
WELLINGTON, CHRISTCHURCH, NADI, NAURU ISLAND
Time Zone Major cities in same time zone
Differential
•Based on data as of December 2002.