Casio 2911 Reference, Daylight Saving Time (DST), Graphic Area, Power Saving Function, Auto Return Features, Scrolling, Initial Screens, Timekeeping

Operation Guide 2911

3.When the setting you want to change is flashing, use Band/or Dto 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 (A), Standard Time	Press D.
	(OF), and Daylight Saving Time (ON)

	Toggle between 12-hour (12H) and 24-hour	Press D.
	(24H) timekeeping
	Reset the seconds to 00	Press D.
	Toggle the illumination duration setting between	Press B.
	1.5 seconds ( ) and 2.5 seconds ( )
	Change the hour, minutes, or year	Use D(+) and B
		(–).

	Change the month or day

	Toggle Power Saving on (ON) and off (OF)	Press D.

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

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

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

Power Saving: Power Saving Function

4.Press Ato exit the setting screen.

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 Rugby and Mainflingen 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 received time signal.

•The default DST setting is Auto DST (A) whenever you select BER, PAR, or LON 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 Auntil the city code starts to flash, which indicates the setting screen.

2.Press Cand 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)
Auto DST (A)	DST off (OF)	DST on (ON)

4. When the setting you want is selected, press Ato 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.

Graphic Area

The following describes the information indicated by the graphic area in each mode.

Graphic area

Mode	Graphic Area
Timekeeping	Timekeeping Mode seconds

World Time	Timekeeping Mode seconds

Alarm	No indication
Countdown Timer	Countdown time 1/10-second

Stopwatch	Stopwatch time 1/10-second

Power Saving Function

When turned on, the Power Saving function enters a sleep state automatically whenever the watch is left in an area where it is dark for a certain period. The table below shows how watch functions are affected by the Power Saving function.

Power saving indicator

Elapsed Time	Display	Operation
in Dark
60 to 70 minutes	Blank, with Sleep indicator	All functions enabled, except
	(P.SAVE) flashing	for the display

6 or 7 days	Blank, with Sleep indicator	Beeper tone, illumination, and
	(P.SAVE) not flashing	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 10:59 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

1. In the Timekeeping Mode, hold down A until the city

code starts to flash, which indicates the setting screen.

2. Press Cnine times until the Power Saving on/off

screen appears.

3. Press Dto toggle Power Saving on (ON) and off (OF).

4. Press Ato exit the setting screen.

• The Power Saving indicator (P.SAVE) is on the display

On/Off status in all modes while Power Saving is turned on.

Auto Return Features

•If you leave the watch in the Alarm Mode for two or three minutes without performing any operation, it returns to the Timekeeping Mode automatically.

•If you leave the watch with a flashing setting on the display for two or three minutes without performing any operation, the watch exits the setting screen automatically.

Scrolling

The Band D buttons are used in various modes and setting screens to scroll through data. In most cases, holding down these buttons scrolls through the data at high speed.

Initial Screens

When you enter the World Time or Alarm Mode, the data you were viewing when you last exited the mode appears first.

Radio-controlled Timekeeping Precautions

•Strong electrostatic charge can result in the wrong time being set.

•The time calibration signal is bounced off the ionosphere. Because of this, such factors as changes in the reflectivity of the ionosphere, as well as movement of the ionosphere to higher altitudes due to seasonal atmospheric changes or the time of day may change the reception range of the signal and make reception temporarily impossible.

•Even if the time calibration signal is received properly, certain conditions can cause the time setting to be off by up to one second.

•The current time setting in accordance with the time calibration signal takes priority over any time settings you make.

•The watch is designed to update the date and day of the week automatically for the period January 1, 2000 to December 31, 2099. Setting of the date by the time calibration signal cannot be performed starting from January 1, 2100.

•This watch can receive signals that differentiate between leap years and non-leap years.

•Though this watch is designed to receive both time data (hour, minutes, seconds) and date data (year, month, day), certain signal conditions can limit reception to time data only.

•Normally, the signal reception date shown by the Last Signal screen is the date data included in the received time calibration signal. When only time data is received, however, the Last Signal screen shows the date as kept in the Timekeeping Mode at the time of signal reception.

•If you are in an area where proper time calibration signal reception is impossible, the watch keeps time within ±15 seconds a month at normal temperature.

•If you have problems with proper time calibration signal reception or if the time setting is wrong after signal reception, check your current city code, DST (summer time), and auto receive settings. The following are the initial factory defaults for these settings.

Setting	Initial Factory Default
City code	BER (Berlin)
DST (summer time)	A
	DST (Auto switching)
Auto receive	qvtA (Auto receive)

Transmitters

This watch is designed to receive the time calibration signal transmitted from Rugby, England and the signal from Mainflingen, Germany. You can select either one of the transmitters, or you can configure the watch to select the transmitter that has the strongest signal automatically.

•The following explains how the watch determines which transmitter it should check first while the watch is configured for auto transmitter search (qvtA).

In this case:	The watch does this:
The first signal auto search operation	1. Checks the Mainflingen signal first.
after factory default settings are in effect,	2. If the Mainflingen signal cannot be
or after the city code has been changed	received, checks the Rugby signal.
Any case other than the above.	1. Checks the last successfully received
	signal first.
	2. If the last successfully received signal
	cannot be received, checks the other
	signal.

•Since the watch checks signals from both transmitters when qvtA is selected as the transmitter setting, signal reception can take as long as 12 minutes.

Timekeeping

•Resetting the seconds to 00 while the current count is in the range of 30 to 59 causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are reset to 00 without changing the minutes.

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

•The year can be set in the range of 2000 to 2099.

•The watch’s built-in full automatic calendar makes allowances for different month lengths and leap years. Once you set the date, there should be no reason to change it except after you have the watch’s battery replaced or when battery power drops to Level 4.

•The current time for all city codes in the Timekeeping Mode and World Time Mode is calculated in accordance with the Greenwich Mean Time (GMT) differential for each city, based on your Home City time setting.

•GMT differential is calculated by this watch based on Universal Time Coordinated

(UTC*) data.

*UTC is the world-wide scientific standard of timekeeping. It is based upon carefully maintained atomic (cesium) clocks that keep time accurately to within microseconds. Leap seconds are added or subtracted as necessary to keep UTC in sync with the Earth’s rotation. The reference point for UTC is Greenwich, England.