Casio 3353, 3354, 5053 Timekeeping, Charging Precautions, Charging Guide, Setting the Digital Time and Date Manually, Daylight Saving Time (DST)

Operation Guide 3353 3354 5053

•The flashing charge indicator ( C ) at Level 3 tells you that battery power is very low, and that exposure to bright light for charging is required as soon as possible.

•At Level 4, all functions are disabled and settings return to their initial factory defaults. Functions are enabled once again after the rechargeable battery is charged, but you need to set the time and date, after the battery reaches Level 2 after dropping to Level 4.

•Leaving the watch in direct sunlight or some other very strong light source can cause the battery level indicator to temporarily show a reading that is higher than the actual battery level. The correct battery level indicator should appear after a few minutes.

• If you use the light or alarms a number of times during a

short period, the recover indicator ( R ) appears on the display and the following operations become disabled until battery power recovers.

Illumination

Beeper tone

Coordination between digital and analog timekeeping

Recover indicator Time calibration signal reception

After some time, battery power will recover and the recover indicator will disappear, indicating that the above functions are enabled again.

Charging Precautions

Certain charging conditions can cause the watch to become very hot. Avoid leaving the watch in the areas described below whenever charging its rechargeable battery. Also note that allowing the watch to become very hot can cause its liquid crystal display to black out. The appearance of the LCD should become normal again when the watch returns to a lower temperature.

Warning!

Leaving the watch in bright light to charge its rechargeable battery can cause it to become quite hot. Take care when handling the watch to avoid burn injury. The watch can become particularly hot when exposed to the following conditions for long periods.

•On the dashboard of a car parked in direct sunlight

•Too close to an incandescent lamp

•Under direct sunlight

Charging Guide

After a full charge, timekeeping remains enabled for up to about 5 months.

•The following table shows the amount of time the watch needs to be exposed to light each day in order to generate enough power for normal daily operations.

Exposure Level (Brightness)	Approximate Exposure Time
Outdoor Sunlight (50,000 lux)	5 minutes
Sunlight Through a Window (10,000 lux)	24 minutes
Daylight Through a Window on a Cloudy Day	48 minutes
(5,000 lux)
Indoor Fluorescent Lighting (500 lux)	8 hours

•Since these are the specs, we can include all the technical details.

•1 illumination operation (1.5 seconds) per day

•10 seconds of alarm operation per day

•5 times calibration reception per day

•Stable operation is promoted by frequent charging.

Recovery Times

The table below shows the amount exposure that is required to take the battery from one level to the next.

Exposure Level	Approximate Exposure Time
(Brightness)
	Level 4		Level 3		Level 2			Level 1
		▲		▲			▲		▲
Outdoor Sunlight (50,000 lux)	1 hour				10 hours			5 hours
Sunlight Through a Window	4 hours				48 hours			22 hours
(10,000 lux)
Daylight Through a Window	8 hours				99 hours			46 hours
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting	76 hours					– – –
(500 lux)

•The above exposure time values are all for reference only. Actual required exposure times depend on lighting conditions.

Timekeeping

Use the Timekeeping Mode to set and view the current time and date. This section also explains how to manually set the current date and time.

•When setting the time, you can also configure settings for the illumination duration, the 12/24-hour format, and power saving on/off.

•All of the operations in this section are performed in the Timekeeping Mode, which you can enter by pressing C.

Date Screen		Receiving		Receiving
Day
	▲Indicator and			indicator
	Press A.	Seconds Count
	▲	▲	A	Seconds
		Current Time
	A			Hour :
Day of week ▲		Screen
				Minutes
Press D.				PM indicator
▲
Reception date
	2 seconds	Reception Time
Last Signal Screen		2 seconds

2 seconds

Setting the Digital Time and Date Manually

Make sure you select your Home City code before you change the current time and date settings. World Time Mode times are all displayed in accordance with the Timekeeping Mode settings. Because of this, World Time Mode times will not be correct if you do not select the proper Home City code before setting the time and date in the Timekeeping Mode.

To set the current digital time and date manually

			1. In the Timekeeping Mode, hold down A until the
				transmitter indicator 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.
		2. Use A or C to move the flashing in the sequence
				shown below to select other settings.
Transmitter indicator
Transmitter/					Press C.			/ Press A.
						C
City Settings			Transmitter				City Code		DST	Auto
										Receive
		A
Time/Date						C
	12/24-Hour
Settings	Format						Seconds		Hour	Minutes
			Power				Day		Month	Year
			Saving

3.When the setting you want to change is flashing, use B and/or D to change it as described below.

Transmitter/City Settings

Screen:	To do this:	Do this:
	Change the transmitter setting (AT,	Use D.
	MSF, or DCF)
	Change the city code	Use D (east) and B (west).
	Toggle between Daylight Saving	Press D.
	Time (ON) , Standard Time (OF),
	or Auto DST (A)
	Toggle between auto receive on	Press D.
	(ON) and off (OF)

•See “City Code Table” for a complete list of available city codes.

Time/Date Settings

Screen:	To do this:			Do this:
	Toggle between 12-hour (		)	Press D.
	and 24-hour (	) timekeeping
	Reset the seconds to			Press D.
	Toggle the illumination duration			Press B.
	setting between 1.5 second (		) and
	2.5 seconds (	)
	Change the hour or minutes			Use D (+) and B (–).
	Change the year			Use D (+) and B (–).
	Change the month or day			Use D (+) and B (–).
	Toggle Power Saving on (ON) and			Press D.
	off (OF)

•For information about settings other than the time and date, see the following. Illumination duration: Illumination

Power Saving: Power Saving Function

4.Use A to exit the setting screen.

•If a Transmitter/City Setting screen is displayed, press A twice.

•If a Time/Date Setting screen is displayed, press A once.

•The second hand will advance at high speed to the correct position in accordance with the digital time seconds count, and resume normal movement from there.

•When you exit the setting screen, the analog hands are adjusted automatically to match the digital time. See “Analog Timekeeping” for more information.

Note

•See “Transmitters” for more information.

•Auto DST (A) can be selected only while BER, PAR, LON, or ATH is selected as the Home City code. For more information, see “Daylight Saving Time (DST)” below.

•The auto receive setting is used for time calibration signal reception only. See “About Auto Receive” for details.

Daylight Saving Time (DST)

Daylight Saving Time (summer time) advances the time setting by one hour from Standard Time. Remember that not all countries or even local areas use Daylight Saving Time.

The time calibration signals transmitted from Anthorn and Mainflingen includes both Standard Time and DST data. When the Auto DST setting is turned on, the watch switches between Standard Time and DST (summer time) automatically in accordance with the received time signal.

•The default DST setting is Auto DST (A) whenever you select BER, PAR, LON, or ATH as your Home City code.

•If you experience problems receiving the time calibration signal in your area, it is probably best to switch between Standard Time and Daylight Saving Time (summer time) manually.

To change the Daylight Saving Time (summer time) setting

1.In the Timekeeping Mode, hold down A until the transmitter indicator starts to flash, which indicates the setting screen.

2.Press C twice and the DST setting screen appears.

3.Use D to cycle through the DST settings in the sequence shown below.

Auto DST (A) DST off (OF) DST on (ON)

4. When the setting you want is selected, press Atwice to exit the setting screen.

•The DST indicator appears on the display to indicate that Daylight Saving Time is

turned on.

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