Operation Guide 3178
World Time
Reference
City code
Current time and date in the zone of the selected city code
World Time shows the current time in 48 cities (29 time zones) around the world.
•All of the operations in this section are performed in the World Time Mode, which you enter by pressing C.
To view the time for another city codeIn the World Time Mode, press Dto scroll eastwardly through city codes.
•For full information about city codes, see the “City Code Table”.
•If the current time for a city is wrong, check your Timekeeping Mode time and time zone settings and make necessary changes.
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 information shown in the graphic area depends on the current mode.
Graphic area
•The following table shows the information that appears in graphic area.
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| 1. In the World Time Mode, use D to display the city code | |
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| (time zone) whose Standard Time/Daylight Saving Time | |
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| setting you want to change. | |
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| 2. Hold down Afor about one second to toggle Daylight | |
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| Saving Time (DST displayed) and Standard Time (DST | |
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| not displayed). | |
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| • The DST indicator is on the display whenever you | |
DST indicator | |||||||||
display a city code for which Daylight Saving Time is | |||||||||
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| turned on. | |
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| • Note that the DST/Standard Time setting affects only the | |
| Mode | Graphic Area |
Timekeeping | Timekeeping Mode seconds |
World Time | Timekeeping Mode seconds |
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Stopwatch (ST1 and ST2) | Sweeps from left to right |
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Countdown Timer | Sweeps from right to left |
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Alarm | No indication |
currently displayed city code. Other city codes are not |
affected. |
Illumination
This watch has an EL
• The auto light switch must be turned on (indicated by the auto light switch indicator) for it to operate.
• See “Illumination Precautions” for more important information.
Auto light switch indicator
Flash Alert
Flash Alert indicator
When Flash Alert is turned on, the illumination flashes for the alarms, the Hourly Time Signal, the countdown alarm, and stopwatch (ST1) auto start.
To turn Flash Alert on and offIn the Timekeeping Mode, hold down Dfor about three seconds to toggle Flash Alert on (Flash Alert indicator displayed) or off (Flash Alert indicator not displayed).
•Illumination flashes twice when you turn Flash Alert on and once when turn Flash Alert off.
•While Flash Alert is turned on, the Flash Alert indicator remains on the display in all modes.
•Note that pressing D to toggle Flash Alert on or off will also switch timekeeping between
In any mode, press Bto turn on illumination.
•The above operation turns on illumination regardless of the current auto light switch setting.
•You can use the procedure below to select either 3 seconds or 5 seconds as the illumination duration. When you press B, the illumination will remain on for about 3 seconds or 5 seconds, depending on the current illumination duration setting.
To specify the illumination duration1. In the Timekeeping Mode, hold down A until the seconds start to flash, which indicates the setting screen.
2. While the seconds are flashing, press Bto toggle the setting between 3 seconds ( 
) and 5 seconds ( 
).
3. Press Ato exit the setting screen.
About the Auto Light Switch
While the auto light switch is enabled, illumination turns on 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 at more than 40 degrees causes illumination to turn on.
•Wear the watch on the outside of your wrist.
Parallel to ground | More than 40 ° |
•Always make sure you are in a safe place whenever you are reading 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 startle 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 offIn the Timekeeping Mode, hold down B for about three seconds to toggle the auto light switch on (auto light switch indicator displayed) or off (auto light switch indicator not displayed).
•The auto light switch 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 turns off automatically approximately six hours after you turn it on.
Button Operation Tone
The button operation tone sounds any time you press one of the watch’s buttons. You can turn the button operation tone on or off as desired.
• Even if you turn off the button operation tone, the alarms, the Hourly Time Signal, the countdown alarm, and stopwatch auto start all operate normally.
To turn the button operation tone on and offIn any mode (except when a setting screen is on the display), hold down Cto toggle the button operation tone on (mute indicator not displayed) and off (mute indicator displayed).
•Holding down Cto turn the button operation tone on or off also causes the watch’s current mode to change.
•The mute indicator is displayed in all modes when the button operation tone is turned off.
Auto Return Features
•If you leave the watch in the Alarm Mode for two or three minutes without performing any operation, it automatically changes to the Timekeeping Mode.
•If you leave a screen with flashing digits on the display for two or three minutes without performing any operation, the watch automatically exits the setting screen.
Scrolling
The Band 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 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.
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
All World Time Mode times are calculated from the current Home City time in the Timekeeping Mode using UTC offset values.
•The seconds count of the World Time is synchronized with the seconds count of the Timekeeping Mode.
•The UTC offset is a value that indicates the time difference between a reference point in Greenwich, England and the time zone where a city is located.
•The letters “UTC” is the abbreviation for “Coordinated Universal Time”, which is the
Illumination Precautions
•The
•Illumination 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.
•Illumination turns off automatically whenever an alarm sounds.
•Frequent use of illumination runs down the battery.
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