Casio 2583, 2587, 2406 Owner's Manual

Module 2406

Receive indicator

Receive indicator

MO0308-EC

Operation Guide 2406 2583 2587

About This Manual

•The operational procedures for Modules 2406, 2583 and 2587 are identical. All of the illustrations in this manual show Module 2406.

(Light)		(Light)
L	A	L	A
	B		B
D	C	D	C
Module 2406		Modules 2583, 2587

•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.

General Guide

•Press Dto change from mode to mode.

•In any mode, press Lto illuminate the display.

	Timekeeping Mode		Alarm Mode
	L	A	Press D.
			▲
		B
	D	C	▲

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

	Time zone indicator			1. Use D to enter the Time Zone Mode.
				2. Hold down B until the current time zone differential
		(E/C/M/P)
		Time zone differential		value starts to flash, which indicates the setting screen.
				• The time zone differential value indicates the number
		(Indicates –5h)
			A	of hours difference in time between the currently
				selected time zone and UTC in Greenwich, England.

On-screen indicators also indicate North American

Btime zones as shown in the table below.

•Note that this watch does not have a time zone that

D C corresponds to Newfoundland.

	Time Zone Indicator	Time Zone Differential	Major cities in same time zone
	E (Eastern)	–5h	NEW YORK, MONTREAL, DETROIT,
			MIAMI, BOSTON
	C (Central)	–6h	CHICAGO, HOUSTON, DALLAS/
			FORT WORTH, NEW ORLEANS,
			MEXICO CITY, WINNIPEG
	M (Mountain)	–7h	DENVER, EL PASO,
			EDMONTON,CULIACAN
	P (Pacific)	–8h	LOS ANGELES, SAN FRANCISCO,
			LAS VEGAS, VANCOUVER,
			SEATTLE, TIJUANA

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.

•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.

Date Alert Mode	Time Zone Mode
▲	▲
	Stopwatch Mode
	▲

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.

Resin Band Metal Band

• 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

Ccare 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.

C

Modules 2583, 2587

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.

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