Casio 4798 User Manual

DST indicator

MO0712-EB

Operation Guide 4798

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to read this manual carefully.

Starting second hand movement and digital display

To conserve battery power, the watch is shipped from the factory with its functions disabled. Pressing any one of the watch’s three buttons will activate its functions, which will cause the second hand to start moving and the digital display to activate.

Your watch switches automatically between Standard Time and Daylight Saving Time (summer time).

Note, however, that switching cannot be performed correctly if the watch is not able to receive the time calibration signal.

If you notice that the current time is not displayed properly, use the procedure under “To perform manual receive” or “To set the time and date manually” to correct it.

General Guide

•Press Cto change from mode to mode.

•About one or two seconds after you enter the Dual Time Mode, Alarm Mode, or Hand Setting Mode, the hands will move to the position that indicates the current setting of the mode.

•In the Timekeeping Mode (except when a setting screen is on the display), press B to illuminate the face of the watch for about one second.

Timekeeping Mode

Press C.

▲

Radio-controlled Atomic 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.

•Supported time calibration signals: Germany (Mainflingen), England (Rugby).

•See the information under “Signal Reception Troubleshooting” if you experience problems with time calibration signal reception.

Current Time Setting

This watch adjusts its time setting automatically in accordance with a time calibration signal. You also can perform a manual procedure to set the time and date, when necessary.

•The first thing you should do after purchasing this watch is to specify your Home Time Zone, which is the time zone where you normally will use the watch. For more information, see “To specify your Home Time Zone” below.

•When using the watch outside the range of the time signal transmitter, you have to adjust the current time setting manually as required. See “Timekeeping” for more information about manual time settings.

To specify your Home Time Zone

1.In the Timekeeping Mode, hold down Auntil the GMT differential value starts to flash, which indicates the

setting screen.

•The second hand will move at high speed to the 12 o’clock position, where it will stop.

						• The GMT differential value indicates the time
						difference in hours between Greenwich Mean Time
						and the currently selected time zone.
	I	I I	II			• The DST indicator indicates that Daylight Saving Time
	II		I			(summer time) is turned on for the currently selected
	I			I
	I	I I	I			time zone.
						2. Use B(+) to select the time zone you want to use as
	GMT differential					your Home Time Zone.
						• The table below shows the GMT differential values for
	value
						major cities in the Western Europe time zones.
	Time Zone					Other major cities in same time zone
	+0.0 (DST +1.0)				London, Dublin, Lisbon, Casablanca, Dakar, Abidjan
	+1.0 (DST +2.0)				Paris, Milan, Rome, Madrid, Amsterdam, Algiers, Hamburg,
					Frankfurt, Vienna, Stockholm, Berlin
	+2.0 (DST +3.0)				Athens, Cairo, Jerusalem, Helsinki, Istanbul, Beirut,
					Damascus, Cape Town

3. Press A to exit the setting screen.

•The second hand will advance at high speed to the correct position and resume normal movement from there.

•Normally, your watch should show the correct time as soon as you specify your Home Time Zone. If it does not, it should adjust automatically after the next auto receive operation (in the middle of the night). You also can perform manual receive or you can set the time manually.

•Selecting +0.0, +1.0, or +2.0 (+1.0, +2.0, or +3.0 while DST is turned on) as your Home Time Zone turns on auto receive automatically. When auto receive is turned on and you are within the reception range, the watch will receive the time calibration signal automatically from the applicable transmitter (in the middle of the night) and update its settings accordingly. For information about the relationship between time zones (GMT differential values) and transmitters, see “Transmitters”.

•See the maps under “Reception Ranges” for information about the reception ranges of the watch.

•If you are in an area that does not use Daylight Saving Time (summer time), turn off the DST setting.

•Even if the time calibration signal is received correctly, there are some times when the analog hands may not indicate the correct time. If this happens, use the procedures under “Adjusting the Home Positions” to check the home positions of the

hands, and make adjustments as required.

About This Manual

Stopwatch 1/20 second hand	• Button operations are indicated using the letters shown
Minute hand	in the illustration.
	• Each section of this manual provides you with the
Hour hand	information you need to perform operations in each
	mode. Further details and technical information can be
	found in the “Reference” section.

Date

24-hour hand

Stopwatch

minute hand Second hand (Timekeeping/

Stopwatch)

Stopwatch Mode	Dual Time Mode
▲	▲
Hand Setting Mode	Alarm Mode
▲	▲

Time Calibration Signal Reception

There are two different methods you can use to receive the time calibration signal: auto receive and manual receive.

• Auto Receive

With auto receive, the watch receives the time calibration signal automatically up to six times a day. When any auto receive is successful, the remaining auto receive operations are not performed. 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.

12 o’clock

or

•Make sure the watch is facing the right way.

•Proper signal reception can be difficult or even impossible under the conditions listed below.

Inside or	Inside a	Near	Near a	Near high-	Among or
among	vehicle	household	construction	tension	behind
buildings		appliances,	site, airport, or	power lines	mountains
		office	other sources
		equipment,	of electrical
		or a mobile	noise
		phone

•Signal reception normally is better at night than during the day.

•Time calibration signal reception takes from two to seven minutes, but in some cases it can take as long as 14 minutes. Take care that you do not perform any button operations or move the watch during this time.

•When within range of the applicable transmitter, this watch can receive either the Germany (Mainflingen) and England (Rugby) time calibration signals.

See “Transmitters” for more information.

Reception Ranges

1,500 kilometers

Rugby
500 kilometers	Mainflingen

1

Y (YES)

N (NO)

N (NO)

W (WORK)

R (READY) Y (YES)

Operation Guide 4798

•Signal reception may not be possible at the distances noted below during certain times of the year or day. Radio interference also may cause problems with reception.

Mainflingen (Germany) or Rugby (England) transmitters: 500 kilometers (310 miles)

•Even when the watch is within the reception range of the transmitter, signal reception will be 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.

About Auto Receive

The watch receives the time calibration signal automatically up to six times a day. When any auto receive is successful, the remaining auto receive operations are not performed. The reception schedule (calibration times) depends on your currently selected Home Time Zone, and whether standard time or Daylight Saving Time is selected for your Time Zone.

Note

•Auto receive is turned on whenever +0.0, +1.0, or +2.0 (+1.0, +2.0, or +3.0 while DST is turned on) is selected as the Home Time Zone.

	Your Time Zone				Auto Receive Start Times
			1	2		3	4	5	6
	+0.0	Standard Time	1:00 am	2:00 am		3:00 am	4:00 am	5:00 am	Midnight
	(DST +1.0)
		Daylight Saving	2:00 am	3:00 am		4:00 am	5:00 am	Midnight	1:00 am*
		Time
	+1.0	Standard Time	2:00 am	3:00 am		4:00 am	5:00 am	Midnight	1:00 am*
	(DST +2.0)
		Daylight Saving	3:00 am	4:00 am		5:00 am	Midnight	1:00 am*	2:00 am*
		Time
	+2.0	Standard Time	3:00 am	4:00 am		5:00 am	Midnight	1:00 am*	2:00 am*
	(DST +3.0)
		Daylight Saving	4:00 am	5:00 am		Midnight	1:00 am*	2:00 am*	3:00 am*
		Time
	Note								*Next day

•The auto receive operation is performed only if the watch is in the Timekeeping Mode or Dual Time Mode when a calibration time is reached. It is not performed if a calibration time is reached while an alarm is sounding or while you are configuring settings .

•Auto receive 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 receive the signal easily.

•The watch receives the calibration signal for two to 14 minutes everyday when the time in the Timekeeping Mode reaches each of the calibration times. Avoid performing any button operation within 14 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 current time in the Timekeeping Mode.

To perform manual receive

1. Place the watch on a stable surface so its 12 o’clock side is facing towards a window.

2. In the Timekeeping Mode, hold down Afor about two

seconds until the watch beeps.

3. The second hand will move to R (READY) to indicate

that the watch is setting up for time calibration

reception.

• The second hand will move to W (WORK) and stay there

while actual reception is in progress.

• The hour and minute hands continue to keep time normally.

• Time calibration signal reception takes from two to

seven minutes, but in some cases it can take up to 14

minutes. Take care that you do not perform any button

operations or move the watch during this time.

• If reception is successful, the second hand will move to

Y (YES). One minute later, the hands will move to the correct time.

Note

•To interrupt a receive operation and return to the Timekeeping Mode, press any button.

•If reception is not successful, the second hand will move to N (NO).

One minute later, the second hand will resume normal operation, without any adjustment of the hand setting.

•If the second hand is pointing to Y (YES) or N (NO), you can return to the Timekeeping Mode by pressing any button.

To check the latest signal reception results

In the Timekeeping Mode, press A.

• If the watch was able to perform a successful signal

receive operation since midnight, the second hand will

move to Y (YES). If the watch has been unable to

receive any signal successfully, the second hand will

move to N (NO).

• The watch will return to the Timekeeping Mode after five

seconds.

• The current receive result is cleared when the first auto receive operation is performed on the following day. This means Y (YES) indicates successful signal reception since the start of the current day.

•If you have adjusted the time or date setting manually, the second hand will indicate N (NO) here.

Signal Reception Troubleshooting

Check the following points whenever you experience problems with signal reception.

Problem	Probable Cause	What you should do
The	• You changed the time setting	• Perform manual signal
second hand	manually.	receive or wait until the next
is pointing at	• You performed some button operation	auto signal receive operation
N (NO).	during the auto receive operation.	is performed.
	• Signal reception results are reset	• Check to make sure the
	when the first auto receive	watch is in a location where it
	operation of the day is performed.	can receive the signal.
Time setting is	• The Home Time Zone setting is not	• Select the correct Home
incorrect	correct for the area where you are	Time Zone.
following signal	using the watch.
reception.

•For further information, see “Important!” under “Time Calibration Signal Reception” and “Radio-controlled Atomic Timekeeping Precautions”.

Stopwatch

Stopwatch 1/20 second hand

*This hand rotates and indicates the second count during the first 60 seconds.

	Second hand	Stopwatch
		1/100 second

Stopwatch minute hand

You can use the stopwatch to measure elapsed time, cumulative elapsed time, and lap times. You also can input the distance of the course or a particular segment of the course of the race you are watching. That distance is used along with the elapsed time, cumulative elapsed time, or lap time measured by the watch to calculate and display the average speed for the course or segment.

•See “Average Speed” for more information.

•Never operate the stopwatch while operating any motor vehicle or while riding a motorcycle. Doing so is very dangerous and can cause an accident.

•Entering the Stopwatch Mode causes the second hand, the stopwatch minute hand and stopwatch 1/20 second hand to move to the 12 o’clock position.

•The display range of the stopwatch is 59 minutes, 59.99 seconds.

•The stopwatch continues to run, restarting from zero after it reaches its limit, until you stop it.

•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 C.

	To measure elapsed time	1. In the Stopwatch Mode, press Bto start elapsed time
	Stopwatch 1/20
	second hand	measurement.
		2. Press B to stop elapsed time measurement.
	Second hand	• The stopwatch 1/20 second hand will rotate for the first
		60 seconds of the measurement operation only. After
		that, it will stop. Whenever you press Bto stop a
		measurement operation, this hand will move
		automatically to the applicable 1/20 second position for
		the elapsed time, as measured internally by the watch.
		• Press Ato reset the stopwatch to zero.

Stopwatch

Stopwatch

minute hand 1/100 second

To measure cumulative elapsed time

1.In the Stopwatch Mode, press B to start elapsed time measurement.

2.Press Bto stop elapsed time measurement.

3.Press Bagain to restart elapsed time measurement.

4.Press Bto stop elapsed time measurement.

•Repeat steps 3 and 4 as many times as required.

•Press Ato reset the stopwatch to zero.

To measure lap times

Stopwatch 1/20 second hand

Second hand

Stopwatch

Stopwatch

minute hand 1/100 second

Average Speed

1.In the Stopwatch Mode, press Bto start an elapsed time measurement operation.

2.Press Ato display the current lap time.

•Each press of Adisplays the current lap time up to that point.

•The lap time will remain displayed for about two seconds.

•Pressing A to display the current lap time also will start timing of the next lap. This means that the stopwatch does not maintain the total elapsed time or total cumulative time in this case.

•The stopwatch will continue to time the next lap internally, even while the current lap time is displayed.

3.Press Bto stop the stopwatch.

•This will cause the final lap time to appear on the display.

•Press Ato reset the stopwatch.

You also can input the distance of the course or a particular segment of the course of the race you are watching. That distance is used along with the elapsed time, cumulative elapsed time, or lap time measured by the watch to calculate and display the average speed for the course or segment.

The average speed that appears for an elapsed time, cumulative elapsed time, or lap time is calculated based on the times described below.

Elapsed time: Time from the point the stopwatch operation is started up until it was stopped.

Cumulative elapsed time: Total time from the point the cumulative elapsed time operation is started up until it was stopped. Does not include any time when the stopwatch operation was paused.

Lap time: Time of each particular lap.

•Never operate the stopwatch while operating any motor vehicle or while riding a motorcycle. Doing so is very dangerous and can cause an accident.

•For information about inputting a distance, see “To input a course or section distance”.

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