CASIO G3100ED-8
Owner's Manual

USER�S GUIDE 2453
Alarms
Alarm number AM indicator

Countdown Timer
You can set five independent Daily Alarms. When an alarm is turned on, the alarm tone sounds when the alarm time is reached. One of the alarms is a snooze alarm, while the other four are normal (non-snooze) alarms that sound for 20 seconds. You can also turn on an Hourly Time Signal that causes the watch to beep twice every hour on the hour. � The snooze alarm repeats every five minutes, up to seven times. � The alarm number of the display indicates the alarm type, as described below. through : Normal alarm screen : Snooze alarm screen : Hourly Time Signal screen � Alarm settings (and Hourly Time Signal settings) are available in the Alarm Mode, which you enter by pressing C. 1. In the Alarm Mode, press D to scroll through the alarm screens until the one whose time you want to set is displayed.
Minutes Hours

The countdown timer can be set within a range of 1 minute to 24 hours. An alarm sounds when the countdown reaches zero. � The initial default countdown start time when you purchase the watch or after you have its battery replaced is 5 minutes. � Countdown timer functions are available in the Countdown Timer Mode, which you enter pressing C.
To use the countdown timer

Timekeeping Mode time Alarm time (Hour : Minutes)

To set an alarm time

Press D while in the Countdown Timer Mode to start the countdown timer. Seconds � When the end of the countdown is reached, the alarm sounds for 10 seconds or until you stop it by pressing any button. The countdown time is automatically reset to its starting value after the alarm stops. � Press D while a countdown operation is in progress to pause it. Press D again to resume the countdown. � To completely stop a countdown operation, first pause it (by pressing D), and then press B. This returns the countdown time to its starting value.
To set the countdown start time

Timekeeping Mode time

Alarm on indicator

2. After you select an alarm, hold down A until the hour setting of the alarm time starts to flash, which indicates the setting screen. � This operation automatically turns on the alarm. 3. Press C to move the flashing between the hour and minute settings. 4. While a setting is flashing, use D (+) and B (�) to change it. � When setting the alarm time using the 12-hour format, take care to set the time correctly as a.m. (A indicator) or p.m. (P indicator). 5. Press A to exit the setting screen. Alarm Operation Starting from the point the Timekeeping Mode time reaches one hour before an alarm time the display pattern changes each second. This pre-alarm feature lets you know that an alarm time is about to be reached. When the actual alarm time is reached, an alarm tone sounds for 20 seconds. In the case of the snooze alarm, the alarm repeats up to seven times every five minutes until the alarm is turned off. � Pressing any button stops the pre-alarm operation or the alarm tone operation. � The pre-alarm feature works in the Timekeeping Mode only.
To test the alarm

1. In the Countdown Timer Mode, hold down A until the hour setting of the countdown start time starts to flash, which indicates the setting screen. 2. Press C to move the flashing between the hour and minute settings. 3. While a setting is flashing, use D (+) and B (�) to change it. � To set the starting value of the countdown time to 24 hours, set 0:00. 4. Press A to exit the setting screen.

Dual Time
Dual time

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

Timekeeping Mode time

1. Press C to enter the Dual Time Mode. 2. Use D, B, and A to set the Dual Time Mode time. � Each press of D (+) and B (�) changes the time setting in 30-minute increments. � Pressing A sets the Dual Time Mode to the same time as the Timekeeping Mode.

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 The Auto Display feature of this watch automatically cycles through the available color patterns.
To turn off Auto Display

In the Alarm Mode, hold down B to sound the alarm.
To turn a normal 20-second alarm and the Hourly Time Signal on and off

1. In the Alarm Mode, press D to select an normal 20-second alarm ( through ) or the Hourly Time Signal ( ). 2. When the alarm or the Hourly Time Signal you want is selected, press B to turn it on and off. x Indicates alarm is on. Signal is on. Indicates Hourly Time

y

� The alarm on indicator (x) and the Hourly Time Signal on indicator (y) are shown on the display in all modes while these functions are turned on. � If any alarm is on, the alarm on indicator is shown on the display when you change to another mode.
To turn the snooze alarm on and off

1. In the Alarm Mode, press D to select the snooze alarm ( ). 2. Press B to turn it on (SNZ and x displayed) and off (SNZ and x not displayed). � The snooze alarm on indicator ( ) is shown on the display in all modes while this function is turned on.

Press any button to turn off Auto Display. Doing so also performs the corresponding button function as described below. A or B: Enters the Timekeeping Mode. C: Enters the Telememo Mode. D: Toggles between 12-hour and 24-hour formats. L: Turns on the backlight � Turning off Auto Display also returns to the default color pattern.
To turn on Auto Display

Hold down C for about two seconds until the watch beeps. � Note that Auto Display cannot be performed while a setting screen is on the display. Auto Return Features � If you leave the watch in the Telememo 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 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. 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 Telememo or Alarm Mode, the data you were viewing when you last exited the mode appears first. Backlight Precautions The backlight uses an EL (electro-luminescent) panel that causes the entire display to glow for easy reading in the dark. In any mode, press L to illuminate the display for about two seconds. � 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.

Stopwatch
Seconds Minutes

Timekeeping Mode time 1/100 second

The stopwatch lets you measure elapsed time, split times, and two finishes. � The display range of the stopwatch is 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 even if you exit the Stopwatch Mode. � Exiting the Stopwatch Mode while a split time is frozen on the display clears the split time and returns to elapsed time measurement. � All of the operations in this section are performed in the Stopwatch Mode, which you enter by pressing C.

To measure times with the stopwatch
Elapsed Time Start Split Time Start Two Finishes Start Split
First runner finishes. Display time of first runner.

Stop

Re-start

Stop

Clear

Split
(SPLIT displayed)

Split release

Stop

Clear

Stop
Second runner finishes.

Split release
Display time of second runner.

Clear

2