Casio 2575 Dual Time, Reference, Backlight, Auto Return Feature, Initial Screens, Data and Setting Scrolling, Timekeeping, Stopwatch, About the Auto Light Switch

USER’S GUIDE 2575

Note

•Pressing any button stops the alarm tone operation.

•Performing any one of the following operations during a 5-minute interval between snooze alarms cancels the current snooze alarm operation.

Displaying the Timekeeping Mode setting screen Displaying the Alarm1 setting screen

To test the alarmIn the Alarm Mode, hold down D to sound the alarm.To turn Alarms 2 through 5 on and off1. In the Alarm Mode, use Dto select a one-time alarm

	One-time alarm	(alarm number 2 through 5).
	One-time alarm	2. Press Ato toggle the displayed alarm on and off.
	on indicator	2. Press Ato toggle the displayed alarm on and off.
	on indicator	• Turning on a one-time alarm (2 through 5) displays the

		one-time alarm on indicator ( ) on its screen.

•The one-time alarm on indicator is displayed in allmodes.

• If any alarm is on, the alarm on indicator is shown on the display in all modes.

To select the operation of Alarm11.In the Alarm Mode, use Dto select Alarm1.2.Press A to cycle through the available settings in the sequence shown below.SNZ indicator and one-time alarm on indicatorSNZ

One-time alarm on

Snooze alarm on

Alarm off

•The applicable alarm on indicator ( or SNZ ) is displayed in all modes when an alarm is turned on.

•The SNZ indicator flashes during the 5-minute intervals between alarms.

•Displaying the Alarm 1 setting screen while the snooze alarm is turned on automatically turns off the snooze alarm (making Alarm1 a one-time alarm).

To turn the hourly time signal on and off

	Hourly time signal	1. In the Alarm Mode, use D to select the Hourly Time
		Signal.
	on indicator
		2. Press Ato toggle the displayed item on and off.

•Turning on the Hourly Time Signal displays the hourlytime signal on indicator () on its screen.• The hourly time signal on indicator is displayed in all modes.

Dual Time

Warning!

•Always make sure you are in a safe place whenever you are reading the display of the watch using the auto light switch. Be especially careful when running or engaged in any other activity that can result in accident or injury. Also take care that sudden illumination by the auto light switch does not surprise or distract others around you.

•When you are wearing the watch, make sure that its auto light switch is turned off before riding on a bicycle or operating a motorcycle or any other motor vehicle. Sudden and unintended operation of the auto light switch can create a distraction, which can result in a traffic accident and serious personal injury.

To turn the auto light switch on and off

In the Timekeeping Mode, hold down D for about two seconds to toggle the auto light

switch on ( displayed) and off ( not displayed).

•The auto light switch on indicator ( ) is on the display in all modes while the auto light switch 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.

Auto Return Feature

If you leave a screen with flashing digits on the display for two or three minutes without performing any operation, the watch automatically saves any settings you have made up to that point and exits the setting screen.

Initial Screens

When you enter the Alarm Mode, the screen you were viewing when you last exited the mode appears first.

Data and Setting Scrolling

The Aand Dbuttons are used in various modes and setting screens to scroll through data on the display. In most cases, holding down these buttons during a scroll operation scrolls through the data at high speed.

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.

•With the 12-hour format, the PM (PM) indicator appears on the display for times in the range of noon to 11:59 p.m. and no indicator appears 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 year can be set in the range of 2000 to 2039.

•The watch’s built-in full automatic calendar automatically 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.

Stopwatch

• You can use lap time measurement to time how long it takes to complete a specific

portion (such as a single lap) of a race.

Dual time(Hour : Minutes Seconds)

Timekeeping Mode time

The Dual Time Mode lets you keep track of time in a different time zone.

•The seconds count of the Dual Time is synchronized with the seconds count of the Timekeeping Mode.

To set the Dual Time1.Press Cto enter the Dual Time Mode.2.Use A, B, and Dto set the Dual Time Mode time.• Each press of D(+) and A(–) changes the timesetting in 30-minute increments.• Pressing Bsets the Dual Time Mode to the same time as the Timekeeping Mode.

• You can use split time measurement to time how long it takes to get from the start to

a specific point in a race.

Memory Management

Each time you press Ato start a new elapsed time or lap/split operation in the Stopwatch Mode, the watch automatically creates a new “log” in its memory. The log remains open for data storage until you permanently close it by pressing Dto clear the stopwatch to all zeros.

•The watch has enough memory to hold up to 61 records. Since each log title screen uses up one record of memory space, the maximum number of lap/split time records you can store depends on how many logs there are currently in memory, as shown below.

Memory Capacity	Number of Logs	Lap/Split Time Record Capacity
	Currently in Memory

Backlight

	1	61 records – 1 log title screen = 60
61 Records	2	61 records – 2 log title screens = 59

Auto light switch on indicator

The backlight uses an LED (light-emitting diode) and a light guide panel that cause the entire display to glow for easy reading in the dark. The watch’s auto light switch automatically turns on the backlight when you angle the watch towards your face.

•The auto light switch must be turned on (indicated by the auto light switch on indicator) for it to operate.

•See “Backlight Precautions” for other important information about using the backlight.

To turn on the backlight manuallyIn any mode, press Lto illuminate the display for about one second.

•The above operation turns on the backlight regardless of the current auto light switch setting.

5	61 records – 5 log title screens = 56

•The watch also calculates the cumulative total distance for all stopwatch operations since the last time the cumulative total distance was reset. The cumulative total does not affect memory capacity.

•If watch memory is already full when you perform a stopwatch button operation that creates a new log, the oldest log in memory and all of its records are deleted automatically to make room for the new log.

•If you are adding records to the only log in memory and watch memory becomes full, adding another record causes the oldest record in the log to be deleted automatically to make room for the new record.

•If you are adding records to a log when there are multiple logs in memory and watch memory becomes full, adding another record causes the oldest log in memory and all of its records to be deleted automatically to make room for new records.

How Stopwatch Data is Stored

About the Auto Light Switch

Turning on the auto light switch causes the backlight to turn on for about one second, whenever you position your wrist as described below in any mode.

Moving the watch to a position that is parallel to the ground and then tilting it towards you more than 40 degrees causes the backlight to turn on.

Parallel to	More than
ground	40°

The following table describes how data is stored when you perform the various button operations described under “To measure times with the stopwatch.”

Stopwatch Button Operation	Data Store Operation
AStart (from all zeros)	Creates a new log: current date and distance
	(updated as timing progresses)
AStop	Time measurement stops, without storing data in
	memory.
ARe-start	Time measurement re-starts, without storing
	data in memory.
DLap/Split	Creates new record: displayed lap/split times
DClear	Creates new record: displayed lap/split times
	(Stopwatch display is cleared to all zeros.)