USER’S GUIDE 2551

To measure times with the stopwatch

Elapsed Time

Start

Stop

Re-start

Stop

Clear

Split Time

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Start

Split

Split release

Stop

Clear

 

 

 

(SPL displayed)

 

 

 

 

 

Two Finishes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Start

Split

Stop

Split release

Clear

 

 

 

First runner

Second runner

Display time of

 

 

 

 

finishes.

finishes.

second runner.

 

 

 

 

Display time of

 

 

 

 

 

 

 

 

first runner.

 

 

 

 

 

Backlight

Auto light switch on indicator The backlight uses an EL (electro-luminescent) panel that causes 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 manually

In any mode, press Bto illuminate the display for about two seconds.

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

About the Auto Light Switch

Turning on the auto light switch causes the backlight to turn on for about two seconds, 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 ground

More than 40°

 

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

While the Mode Menu or Timekeeping Mode screen is on the display, 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.

In order to protect against running down the battery, the auto light switch automatically turns off approximately six hours after you turn it on. Repeat the above procedure to turn the auto light switch back on if you want.

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 Display

Auto Display continually changes the contents of the digital display.

Inputting Text

The following describes how to input text in the e-DATA MEMORY, Telememo and Alarm Modes.

To input characters

Press the keypad keys to input characters at the cursor

Character type indicator

Cursor

position. You can input upper alpha characters (A through

Z), lower alpha characters (a through z), numbers (0

 

 

through 9), and various symbols.

 

Each key is assigned more than one character. Each

 

press of a key sequentially changes the character at the

 

cursor position. Pressing [2], for example, changes the

 

characters at the cursor position in the sequence: 2

 

A B C 2, etc. The letters and number that a

 

key can input are printed on the key itself. Symbols are

 

not marked on the key.

Each press of [0] toggles input between zero and a space. Pressing [pm] cycles through the various symbols that can be input.

The B button acts as a delete button during text input. Move the cursor to the character you want to delete, and then press B. Characters to the right of the deleted character are shifted left to fill the space.

To switch between upper case and lower case characters, press [=] during text input. The character type indicator shows A when upper case is selected, and a for lower case.

See the “Character List” for information about all the characters that are assigned to each key.

Auto Return Features

If you leave the watch without performing any operation in the e-DATA MEMORY, Telememo, or Alarm Mode for two or three minutes, or in the Calculator Mode for six or seven minutes, it automatically changes to the Mode Menu.

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 any settings you have made up to that point and exits the setting screen.

Scrolling

The Cand D buttons and the [1] and [=] keys 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 at high speed.

Initial Screens

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

When you enter the Timekeeping Mode from the Mode Menu, the Home City time appears first. The information that appears in the top line of the screen is the same type of information that was displayed when you last exited the Timekeeping Mode.

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 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.

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.

The GMT differential is the time difference of the time zone where the city is located from Greenwich Mean Time.

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.

Frequent use of the backlight shortens the battery life.

Auto light switch precautions

Wearing the watch on the inside of your wrist and movement or vibration of your arm can cause the auto light switch to activate and illuminate the display. To avoid running down the battery, turn off the auto light switch whenever engaging in activities that might cause frequent illumination of the display.

To turn off Auto Display

Press any button (except for B) or key to turn off Auto Display.

To turn on Auto Display

Hold down C for about three seconds.

Note that Auto Display cannot be performed while a setting screen is on the display.

More than 15 degrees too high

The backlight may not light if the face of the watch is more than 15 degrees above or below parallel. Make sure that the back of your hand is parallel to the ground.

The backlight turns off in about two seconds, even if you keep the watch pointed towards your face.

Static electricity or magnetic force can interfere with proper operation of the auto light switch. If the backlight does not light, try moving the watch back to the starting position (parallel with the ground) and then tilt it back toward you again. If this does not work, drop your arm all the way down so it hangs at your side, and then bring it back up again.

Under certain conditions, the backlight may not light until about one second after you turn the face of the watch towards you. This does not necessarily indicate malfunction of the backlight.

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