CASIO TRT101H-3
Owner's Manual

2409-2

COUNTDOWN TIMER
Mode indicator

MULTI TIME ZONE
ZONE 3 ZONE 2 ZONE 4 ZONE 1 ZONE 5

The countdown timer can be set within a range of 1 minute to 24 hours. An alarm sounds when the countdown reaches zero. � Countdown timer functions are available in the Countdown Timer Mode, which you can enter using B. � You can also select auto-repeat, which automatically restarts the countdown from the original value you set whenever zero is reached.

The Multi Time Zone lets you view the current time in one of five time zones.

ZONE 2 indicator

Mode indicator

Hours

Minutes

To set the countdown start time 1. In the Countdown Timer Mode, hold down A until the hour digit of the countdown start time starts to flash,
which indicates the setting screen.
Timekeeping Mode time Selected zone time

To set a Multi Time Zone time 1. Press B to enter the Multi Time Zone Mode. 2. Press C to select the zone (ZONE 1 to ZONE 5) whose time you want to set. � In the Multi Time Zone Mode, the upper graphic area indicates the currently selected time zone. 3. Hold down A until the hour digits of the selected zone�s time start to flash, which indicates the setting screen.
4. Press B to move the flashing between the hour and minutes. 5. While a setting is flashing, press C to increase it. � When setting the zone time using the 12-hour format, take care to set the time correctly as a.m. (no indicator) or p.m. (P indicator). 6. Press A to exit the setting screen.

Seconds

2. Press B to move the flashing between the hours and minutes. � To set the starting value of the countdown time to 24 hours, set 0:00. 3. While a setting is flashing, press C to increase it. 4. Press A to exit the setting screen.

To use the countdown timer Press C while in the Countdown Timer Mode to start the countdown timer. � When the end of the countdown is reached and auto-repeat is turned off, 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 C while a countdown operation is in progress to pause it. Press C again to resume the countdown. � To completely stop a countdown operation, first pause it (by pressing C), and then press A. This returns the countdown time to its starting value. � The TR mode indicator flashes on the display while a countdown operation is in progress. The flashing mode indicator remains on the display even if you change to another mode. To turn auto-repeat on and off 1. In the Countdown Timer Mode, hold down A until the hour digit of the countdown start time starts to flash, which indicates the setting screen. 2. Press L to turn auto-repeat on (AUTO-TR displayed) and off (AUTO-TR not displayed). 3. Press A to exit the setting screen. � When the end of the countdown is reached and auto-repeat is turned on, the alarm sounds, but the countdown starts again automatically whenever the countdown reaches zero. You can stop timing by pressing C, and manually reset to the starting countdown time by pressing A. � Frequent use of auto-repeat and the alarm can run down battery power.
Auto light switch on indicator

BACKLIGHT
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 L to illuminate the display for about one second. � 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 one second, whenever you position your wrist as described below in any mode. � Be sure to wear the watch on the outside of your left wrist while using the auto light switch. 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.

STOPWATCH
1/100 second Mode indicator

Parallel to ground

More than 40 °

Hours Minutes Seconds 1000 hours 100 hours

The two finishes. you measure elapsed time, split times, and stopwatch lets � The display range of the stopwatch is 9999 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 even if you exit the Stopwatch Mode. � The STW mode indicator flashes on the display while a stopwatch operation is in progress. The flashing mode indicator remains on the display even if you change to another mode. � All of the operations in this section are performed in the Stopwatch Mode, which you enter by pressing B.

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 measure times with the stopwatch Elapsed Time
Start Split Time Start Two Finishes Split Split release Stop Clear Stop Re-start Stop Clear

To turn the auto light switch on and off In any mode, hold down L for about two seconds to toggle the auto light switch on ( displayed) or off ( not displayed). � The auto light switch on indicator ( ) is on the display in all modes while the auto light switch is turned on.

Start

Split
First runner finishes. Display time of first runner.

Stop
Second runner finishes.

Split release
Display time of second runner.

Clear