USER’S GUIDE 2551
To measure times with the stopwatch
Elapsed Time
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Split Time |
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Start | Split | Split release | Stop | Clear | ||||||
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Two Finishes |
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Start | Split | Stop | Split release | Clear | ||||||
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| First runner | Second runner | Display time of |
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| finishes. | finishes. | second runner. |
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| Display time of |
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| first runner. |
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Backlight
Auto light switch on indicator The backlight uses an EL
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° |
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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
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 | ||
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| 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
•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
•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
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
•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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