Casio 3159, MO1005-EA Timekeeping, Reference, l l, l l, l l, l l l, l l l, l l l, ll l l l, Button Operation Tone, Power Saving Function, Daylight Saving Time (DST)

Operation Guide 3159

Charging Guide

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 (5,000 lux)	48 minutes
Indoor Fluorescent Lighting (500 lux)	8 hours

•For details about the battery operating time and daily operating conditions, see the “Power Supply” section of the Specifications.

•Stable operation is promoted by frequent exposure to light.

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 5	Level 4	Level 3		Level 2		Level 1
				▲		▲		▲
Outdoor Sunlight		2 hours			20 hours		6 hours
(50,000 lux)
Sunlight Through a		8 hours			99 hours		27 hours
Window (10,000 lux)
Daylight Through a		15 hours			201 hours		54 hours
Window on a Cloudy
Day (5,000 lux)
Indoor Fluorescent		171 hours			- - - - - - - -		- - - - - - - -
Lighting (500 lux)

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

Timekeeping

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 Mainflingen (Germany), Anthorn (England), or Fort Collins (the United States) include 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 signals.

•Though the time calibration signals transmitted by the Fukushima and Fukuoka/ Saga, Japan transmitters include summer time data, summer time currently is not implemented in Japan (as of 2009).

•The default DST setting is Auto DST (AvtA) whenever you select LIS, LON, MAD, PAR, ROM, BER, STO, ATH, MOW, TYO, ANC, YVR, LAX,YEA, DEN, MEX, CHI, MIA, YTO, NYC, YHZ, or YYT as your Home City code.

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

To change the Daylight Saving Time (summer time) setting

ll		l l	ll			1. In the Timekeeping Mode, hold down Auntil the city
						code starts to flash, which indicates the setting screen.
l			l			2. Press Cand the DST setting screen appears.
l
			l
l	l l l		l l l		ll	3. Use Dto cycle through the DST settings in the
			l			sequence shown below.
					l
			l
			ll		l
				l l			Auto DST (AvtA)	DST off (OFF)	DST on (ON)
DST indicator

•If you change your Home City to one that is within the same transmitter area, the current DST setting (Auto DST) will be retained. If you change to a city that is outside your current transmitter area, DST will be turned off automatically.

Transmitter	Covered City Codes
Japan	TPE, SEL, TYO
China	HKG, BJS
U.S.	HNL, ANC, YVR, LAX, YEA, DEN, MEX, CHI, MIA, YTO,
	NYC, YHZ, YYT

Current Time

Month. Day

Day of week

Hour : Minutes

Seconds

PM indicator

Use the Timekeeping Mode to set and view the current time and date.

Read This Before You Set the Time and Date!

This watch is preset with a number of city codes, each of which represents the time zone where that city is located. When setting the time, it is important that you first select the correct city code for your Home City (the city where you normally use the watch). If your location is not included in the preset city codes, select the preset city code that is in the same time zone as your location.

•Note that all of the times for the World Time Mode city codes are displayed in accordance with the time and date settings you configure in the Timekeeping Mode.

Europe (U.K., Germany) LIS, LON, MAD, PAR, ROM, BER, STO, ATH, MOW

None All other city codes

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

•The DST indicator appears to indicate that Daylight Saving Time is turned on.

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.

Button Operation Tone

To set the time and date manually

	ll l l l				1. In the Timekeeping Mode, hold down Auntil the city
l					code starts to flash, which indicates the setting screen.
			l
l				l	2. Use Dand Bto select the city code you want.
l			l	l
	l	l l l			• Make sure you select your Home City code before

changing any other setting.

• For full information on city codes, see the “City Code Table”.

3. Press C to move the flashing in the sequence shown below to select the other settings.

12/24-Hour

City CodeDST SecondsHour

Format

Power Saving Day Month Year Minutes

4.When the timekeeping setting you want to change is flashing, use Dor B to change it as described below.

Screen:	To do this:			Do this:
	Change the city code			Use D (east) and B
				(west).
	Cycle between Auto DST (AvtA), Daylight			Press D.
	Saving Time (ON) and Standard Time
	(OFF).
	Toggle between 12-hour (		) and 24-	Press D.
	hour (	) timekeeping
	Reset the seconds to			Press D.
	Change the hour and minutes			Use D (+) and B (–).
	Change the year, month, or day			Use D (+) and B (–).
	Toggle between Power Saving on ( ) and			Press D.
	off (	)

5. Press A to exit the setting screen.

•Auto DST (AvtA) can be selected only while LIS, LON, MAD, PAR, ROM, BER, STO, ATH, MOW, TPE, SEL, TYO, HNL, ANC,YVR, LAX, YEA, DEN, MEX, CHI, MIA, YTO, NYC, YHZ, or YYT is selected as the Home City code. For more information, see “Daylight Saving Time (DST)”.

•The day of the week is displayed automatically in accordance with the date (year, month, and day) settings.

12-hour and 24-hour timekeeping

•With the 12-hour format, the P (PM) 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.

•With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without any indicator.

•The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is

applied in all other modes.

The button operation tone sounds any time you press one

Mute indicator of the watch’s buttons. You can turn the button operation tone on or off as desired.

•Even if you turn off the button operation tone, alarms, the Hourly Time Signal, and other beepers all operate normally.

To turn the button operation tone on and off

In any mode (except when a setting screen is on the display), hold down C to toggle the button operation tone on ( not displayed) and off ( displayed).

•Holding down C to turn the button operation tone on or off also causes the watch’s current mode to change.

• The indicator is displayed in all modes when the button operation tone is turned off.

Power Saving Function

Power	saving indicator		When turned on, the Power Saving function enters a sleep
			state automatically whenever the watch is left in an area
			for a certain period where it is dark. The table below
			shows how watch functions are affected by the Power
			Saving function.
Elapsed Time			Display	Operation
	in Dark
60 to 70 minutes		Blank, with Power Saving		All functions enabled, except for the
		indicator flashing		display
6 or 7 days		Blank, with Power Saving		Auto receive, beeper tone,
		indicator not flashing		illumination, and display are disabled.

•Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.

•The watch will not enter the sleep state between 6:00 AM and 9:59 PM. If the watch is already in the sleep state when 6:00 AM arrives, however, it will remain in the sleep state.

To recover from the sleep state

Perform any one of the following operations.

•Move the watch to a well-lit area.

•Press any button.

•Angle the watch towards your face for reading.

To turn Power Saving on and off
l				1. In the Timekeeping Mode, hold down A until the city
l ll				code starts to flash, which indicates the setting screen.
ll	l
		l	l l l	2. Press C9 times until the Power Saving on/off screen
l	l	l
l			l	appears.
l
l			l	3. Press Dto toggle Power Saving on ( ) and off (	).
	l		ll
l
		l l	l l	4. Press Ato exit the setting screen.
	On/Off status			• The Power Saving indicator is on the display in all
				modes while Power Saving is turned on.

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