Casio 2456 manual Stopwatch, Reference, To Z

USER’S GUIDE 2456

Stopwatch

1/100 second The stopwatch lets you measure elapsed time, split

		times, and two finishes.
		•	The display range of the stopwatch is 23 hours, 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
	Seconds •		even if you exit the Stopwatch Mode.
Hours			All of the operations in this section are performed in
			the Stopwatch Mode, which you enter by pressing
Minutes			C (page E-4).

To measure times with the stopwatch
Elapsed Time
D	➤ D	➤ D	➤ D	➤ A
Start	Stop	Re-start	Stop	Clear
Split Time
D	➤ A	➤ A	➤ D	➤A
Start	Split	Split release	Stop	Clear
Two Finishes
D	➤ A	➤ D	➤ A	➤A
Start	Split	Stop	Split release	Clear
	First runner	Second runner	Display time of
	finishes.	finishes.	second runner.
	Display

time of first runner.

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 Features

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

•If you leave the watch in Alarm, Day Counter, or Telememo Mode for about two minutes without performing any operation, it automatically changes to the Timekeeping Mode.

Data and Setting Scrolling

The B and D buttons 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.

Initial Screens

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

Inputting Text

The following describes how to input text in the Alarm, Day Counter, and Telememo Modes.

To input characters

1. When the cursor is on the display, use B and D to cycle through the available letters, numbers and symbols, in the sequence shown below.

Press D. Press B.

(space) A to Z 0 to 9

Cursor : / . –

2.When the character you want is at the cursor position, press C to move the cursor to the right.

3.Repeat steps 1 and 2 to input the rest of the characters you want.

Display Text

Though you can input up to eight characters for Alarm text, Day Counter text and the Telememo name, only six characters can appear on the display at one time. Because of this, display screens switch alternately between the first six characters and the remaining two characters.

Timekeeping

•Pressing D while setting the current time in the Timekeeping Mode resets the seconds count to zero. Pressing D while seconds count is in the range of 30 to 59 resets the seconds to 00 and adds 1 to the minutes. In the range of 00 to 29, the minutes count is unchanged.

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

•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.

12-hour/24-hour Timekeeping Formats

The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is also applied in all other modes.

•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 the 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, with 24 indicator.

Time Calibration Signal Reception Precautions

•This watch is able to receive the time calibration signal transmitted from Mainflingen, Germany (located 25 kilometers southeast of Frankfurt). Signal reception is possible within the area represented by a circle with a radius of about 800 kilometers.

•Even when the watch is within the reception range, signal reception is impossible if the signal is blocked by mountains or other geological

Frankfurt formations between the watch and signal source.

•Signal reception is affected by weather, atmospheric conditions, and seasonal changes.

•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.

•This watch is designed to receive the signal transmitted from Mainflingen. This means that reception is best when the antenna built into the 12 o’clock edge of the watch is facing towards Mainflingen. Note, however, that moving the watch while the time calibration signal receive operation is taking place will make stable reception impossible.

•Think of the watch as acting like a TV or radio when it is receiving the calibration signal. When receiving indoors, move to a location as near as possible to a window. Proper signal reception can be difficult or even impossible under the conditions listed below.

Near TVs, refrigerators, computers, or other household appliances

Far away from broadcasting stations among ferro-concrete structures or near mountains

Underground, in tunnels or in ferro-concrete buildings

Near high-tension wires, neon signs, or radio stations with interfering frequencies

Near railroads, highways or airports In trains or cars

•Radio interference can make signal reception impossible.

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

•The daily alarm and hourly time signal do not operate during signal reception.

•If you are in an area where proper time calibration signal reception is impossible, the watch keeps time with the precision noted in “Specifications.”

World Time

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

•GMT differential is calculated by this watch based on Universal Time Coordinated (UTC) data.

Backlight Precautions

•The electro-luminescent panel that provides illumination loses power after very long use.

•The illumination provided by the backlight may be hard to see when viewed under direct sunlight.

•The watch may emit an audible sound whenever the display is illuminated. This is due to vibration of the EL panel used for illumination, and does not indicate malfunction.

•The backlight automatically turns off whenever an alarm sounds.

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