Casio 2739 Auto Summer Time (DST) Switching, About Auto Receive, Analog Timekeeping, BER, LON, PAR, CAI, JRS, OFF, OFF, OFF, OFF, ERR, AUTO, AUTO, AUTO, AUTO, Note, Weak

USER’S GUIDE 2367/2739

•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.

Auto Summer Time (DST) Switching

The time calibration signal transmitted from Mainflingen, Germany includes both standard time and summer time (Daylight Saving Time or DST) data. Because of this, the watch automatically switches between standard time and summer time (DST) automatically whenever BER, LON, PAR, CAI, or JRS is selected as the Home City code.

•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.

Auto Summer Time (DST) Default Settings

The following shows the default settings for each of the Home City codes that support auto summer time (DST) switching.

Home City Code	Auto Summer Time Default Setting
BER, LON, PAR	AUTO
CAI, JRS	OFF

The following flows show how to switch the auto summer time setting between AUTO, ON, and OFF.

•The following are the meanings of the AUTO, ON, and OFF indicators. AUTO - Watch will switch between standard time and summer time (DST)

automatically. ON - Summer time (DST)OFF - Standard time (summer time turned off)

•See “To set the current digital time and date manually” for information about configuring summer time (DST) settings.

When BER is the Home City Code

Press D.	After receipt of the time calibration
	signal turns summer time off.
	ON
AUTO (Default)	After receipt of the time calibration
	signal turns summer time on.
	OFF
When LON, PAR, CAI, or JRS is the Home City Code
Press D.		Press B.
AUTO (Default for	OFF (Default for	Press Bor D.	ON
LON and PAR)	CAI and JRS)

To perform manual time calibration signal reception

1. Place the watch on a stable surface to its top (12 o’clock side) is facing in the general direction of

Frankfurt, Germany.

• Position the watch so the case is pointing upwards as shown in the nearby illustration. This puts the watch in the optimum position for time calibration signal reception.

•Note that signal reception is poor if the watch is on its

Receiving indicator											back or side.
										2. In the Timekeeping Mode, hold down Dfor about two
										seconds, until the watch beeps and the current time is
										flashing on the display.
	l	l	l l		l	l l l	l			•	This indicates that signal reception has started.
l							ll l l			•	Time calibration signal reception takes from four to 11
l							ll		l
	l	l l		l l	l	l l	l		l		minutes. Take care that you do not move the watch
							l		l
							l	l l
											during this time.
Current time

•After signal reception is complete, the display of the watch changes to the Last

Signal screen, which shows the new signal receive date and time.

• The Level 4 receiving indicator ( ) indicates that the calibration time reception attempt was successful.

Note

•To interrupt a receive operation and return to the Timekeeping Mode (Date or Time screen), press D.

•If the receive operation is unsuccessful, the message ERR appears on the Last Signal screen for about one or two minutes. After that, the watch returns to the Timekeeping Mode (Date or Time screen).

•You can also change from the Last Signal screen to the Timekeeping Mode (Date or Time screen) by pressing D.

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.

Weak	Strong Weak	Strong
(Level 1) Module 2367	(Level 4) (Level 1) Module 2739	(Level 4)

•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.

•The receiving indicator (Level 4) remains on the display in all modes following reception of the time calibration signal and calibration of the watch’s time setting. The receiving indicator (Level 4) is not displayed if signal reception was unsuccessful or after manual adjustment of the current time setting.

About Auto Receive

When auto receive is turned on, the watch automatically starts to receive the time calibration signal when the digital time in the Timekeeping Mode reaches 2:00 AM, and 4:00 AM each day (calibration times).

Note

•The Auto Receive operation is performed only if the watch is in the Timekeeping Mode when one of the calibration times is reached. It is not performed if the calibration time is reached while you are making 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 digital 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.

• The Level 4 receiving indicator ( ) indicates that one or both of the last calibration time reception attempts were successful. If you do not see the Level 4 receiving indicator, it means there was some problem with the last calibration reception operation. Either perform reception manually, or make sure the watch is set up properly to receive the time calibration signal for the next automatic reception time.

•Even if the calibration reception is successful, the Level 4 receiving indicator disappears every day at 3am.

•When auto receive is turned on, the watch receives the calibration signal for four to 11 minutes each day when the digital time reaches 2:00 AM, and 4:00 AM. Do not operate any of the watch’s buttons within 15 minutes prior to or following the calibration times. Doing so can interfere with correct calibration.

•Remember that reception of the calibration signal depends on the time shown on the digital display. The receive operation will be performed whenever the digital display shows 2:00 AM, and 4:00 AM, regardless of whether or not the displayed time is actually the correct time.

•When two 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.

To turn auto receive on and off

				1. In the Timekeeping Mode, hold down Auntil the
				current Auto Receive On/Off setting (the receiving
l	l		l	indicator) starts to flash, which indicates the setting
			l	screen.
l
l			l	2. Press D to toggle Auto Receive on (ON) and off
		l	l
				(OFF).

3. Press A to exit the setting screen.

Analog Timekeeping

The analog time of this watch is synchronized with the digital time. The analog time setting is adjusted automatically whenever you change the digital time.

Note

•Whenever you manually change the digital time setting or Home City code, or if the time is adjusted by receipt of a time calibration signal, the hands of the analog timepiece move clockwise or counter clockwise to adjust to the new setting. If the analog time does not match the digital time for any reason, use the procedure described under “To adjust the analog time” to match the analog setting to the digital setting.

•Whenever you need to adjust both the digital and the analog time settings manually, make sure you adjust the digital setting first.

•Depending on how much the hands have to move in order to adjust to the digital time, it may take some time before the analog hands stop moving.

•The analog time does not change while a signal receipt operation is in progress. After the receive operation is complete, the analog time is automatically adjusted to match the digital time.

•If a signal receive operation is performed while the analog time and digital time do not match, the digital time will be adjusted correctly but the analog time may not be adjusted. If this happens, perform the steps below to adjust the analog time.

To adjust the analog time						1. In the Timekeeping Mode, press Cfive times to enter
Current time						the Hand Setting Mode.
						2. Hold down Auntil the current digital time starts to
						flash, which indicates the setting screen.
						•	Note that you will not be able to change to the setting
							screen if the analog hands are moving because the
l	l	l l	l	l l			watch is automatically adjusting the analog time to
					l		match the digital time. If this happens, wait until the
l					l
l					l
l		l l l	l	l			hands stop moving.
						3. Use D(+) and B(–) to adjust the analog setting as
						described below.
When you want to do this:									Perform this button operation:
Move the hand setting								•	Press D.
forward 20 seconds
Move the hand setting back								•	Press B.
20 seconds
Move the hand setting a short								•	Hold down D.
way forward at high speed								•	Release D when the hands reach the setting
									you want.
Move the hand setting a								•	Hold down B.
short way back at high speed								•	Release B when the hands reach the setting
									you want.
Move the hand setting a								•	While holding down Dto move the hands at
long way forward at high									high-speed, press B to lock the high-speed
speed								•	hand movement.
									Press any button when the hands are close to
								•	the setting you want.
									Hand movement stops automatically if the hour
									hand makes one full (12-hour) revolution.
Move the hand setting a long								•	While holding down Bto move the hands at
way back at high speed									high-speed, press D to lock the high-speed
								•	hand movement.
									Press any button when the hands are close to
								•	the setting you want.
									Hand movement stops automatically if the hour
									hand makes one full (12-hour) revolution.

4.Press Ato exit the setting screen.

•The minute hand will be adjusted slightly to match the seconds when you exit the setting screen.

•To return to the Timekeeping Mode, press C.

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