CASIO TRT-101H User Manual

Important Information

Battery

The battery installed in your watch is a factory-supplied unit that requires replacement when its power runs low (indicated by a dim display or no backlight). Consult your nearest CASIO dealer or distributor for replacement.

Water Resistance

Watches are classified by their water resistance rating (from I to V) according to the table below. Ensure you understand your watch's rating for proper use.

Notes for Corresponding Ratings:

• Watches are not water resistant. Avoid any moisture.
• Do not pull out the crown if the watch is wet.
• Do not press watch buttons underwater.
• If your watch is exposed to salt water, rinse it thoroughly and dry it.
• This watch can be used for skin diving (excluding depths requiring helium-oxygen mixtures).
• Some water-resistant watches feature leather bands. Do not wear these watches while swimming or engaging in other activities where the band may get wet.

Care of Your Watch

Never attempt to open the case or remove the back cover yourself.

The gasket that seals the watch from water and dust should be replaced every 2-3 years.

If water enters the watch, have it checked immediately by your nearest CASIO dealer or distributor.

Do not expose the watch to extreme temperatures.

While designed for normal use, avoid rough handling and dropping the watch.

Do not fasten the band too tightly. A finger should fit between your wrist and the band.

Clean the watch and band using a dry, soft cloth, or a soft cloth dampened with a mild solution of water and neutral detergent. Never use volatile solvents (e.g., benzine, thinners, spray cleaners, etc.).

When not wearing your watch, store it in a dry place.

Avoid contact with benzine, cleaning solvents, spray cleaners, adhesives, paints, etc. Chemical reactions with these materials can damage gaskets, the case, and the watch's finish.

Some models feature silk-screened designs on their bands. Be careful when cleaning these bands to avoid damaging the designs.

For watches with resin bands...

You may notice a white powdery substance on the band. This substance is harmless to your skin and clothing and can be easily removed by wiping with a cloth.

Exposure of the resin band to sweat or moisture, or storing it in high humidity conditions, can lead to damage, breakage, or cracking. To ensure a long service life for the resin band, wipe it clean of dirt and moisture with a soft cloth whenever possible.

For watches with fluorescent cases and bands...

Prolonged exposure to direct sunlight may cause the fluorescent color to fade.

Prolonged contact with moisture may cause the fluorescent color to fade. Wipe off any moisture from the watch surface as soon as possible.

Prolonged contact with any other wet surface may cause the fluorescent color to fade. Ensure the fluorescent surface is dry and avoid contact with other surfaces.

Rubbing a surface with fluorescent paint against another surface may transfer the fluorescent paint to that surface.

CASIO COMPUTER CO., LTD. is not responsible for any damage that may occur from the use of this watch, nor does it accept claims from third parties.

Operating Modes Overview

The figure shows the watch in the Timekeeping Mode. Pressing [Button B] cycles through the modes in the following sequence: Timekeeping Mode → Alarm Mode → Countdown Timer Mode → Stopwatch Mode → World Time Mode → Timekeeping Mode.

Pressing [Button L] in any mode illuminates the watch display.

Timekeeping Mode

1. Press and hold [Button A] in Timekeeping Mode. The seconds display will flash.

2. Press [Button C] to reset the seconds to 00. If the seconds are between 30 and 59 when [Button C] is pressed, the seconds reset to 00 and the minutes increment. If seconds are between 00 and 29, the minutes do not change.

3. Press [Button A] to begin setting the time.

Setting the Current Time and Date

1. In Timekeeping Mode, press [Button A] to enter setting mode. The seconds display will flash.

2. Press [Button B] to cycle through the values to be set in the following order: Seconds → Hours → Minutes → Year → Month → Day → Day of week.

3. Use [Button C] to increase the flashing value. Holding [Button C] down speeds up the adjustment.

• You can switch between 12-hour and 24-hour formats by pressing [Button L]. The '24' indicator appears for 24-hour format.
• The day of the week is set automatically according to the date.
• The date can be set from January 1, 2000, to December 31, 2039.

4. After setting the date and time, press [Button A] to return to Timekeeping Mode.

Selecting Dynamic or Static Graphics for the Display

1. With static graphics selected, small bars appear in the upper display area every second, and the display shows whether the alarm is on or off.

2. With dynamic graphics selected, bands rotate clockwise on the display every second.

3. Press [Button B] in any mode to switch display views.

World Time Mode

Pressing [Button C] in Timekeeping Mode switches the display between current time and date and the time in another time zone, which is set in World Time Mode.

Setting World Time

1. In World Time Mode, press [Button C] to select a time zone. The selected time zone will be indicated in the upper part of the display.

2. Press [Button A] to enter setting mode. The hours will flash.

3. Use [Button B] to cycle through the values: Hours → Minutes.

4. Use [Button C] to increase the flashing value. Holding [Button C] down speeds up the adjustment.

• When using 12-hour format, ensure you set the time correctly (the 'P' indicator appears for PM times; there is no indicator for AM times).

5. After setting the hours and minutes, press [Button A] to save the settings.

Backlight

Pressing [Button L] in any mode illuminates the display for two seconds.

• The backlight uses electroluminescent (EL) elements, whose brightness decreases after prolonged use.
• A faint sound may be heard when the display is illuminated. This is due to the vibration of the EL elements and is not an indication of malfunction.
• The backlight is difficult to see in direct sunlight.
• Frequent use of the backlight shortens battery life.

Auto Light

You can activate the auto-light function by pressing [Button L] in any mode. Hold the watch horizontally, then tilt it towards you by approximately 40 degrees. The backlight will turn on. The backlight automatically turns off after 2 seconds, even if you continue to hold the watch at the same angle.

• The backlight may not operate if the watch is tilted more than 15 degrees left or right from a position parallel to the ground. Ensure your hand is parallel to the ground.
• Do not wear the watch on the inside of your wrist. This can cause the auto-light function to activate accidentally, reducing battery life.
• Do not read the watch while climbing mountains or in other hazardous locations where it is dark. This is dangerous and may lead to injury.
• Do not read the watch while walking along roads or near traffic. This is risky and may lead to accidents.
• Do not read the watch while riding a bicycle, motorcycle, or driving a car. This is dangerous and may lead to accidents.
• Before operating a vehicle, check that the auto-light function is turned off. Accidental activation of the auto-light may distract you and lead to an accident.

Sound Alarm Mode

You can set one of five different sound alarms. The alarm sounds when the set time is reached. You can stop it by pressing any button. If the hourly time signal is on, a short beep sounds at the start of each hour.

Setting the Alarm Time

1. In Sound Alarm Mode, press [Button C] to select the alarm type: Alarm 1, Alarm 2, Alarm 3, Alarm 4, Alarm 5, or Time Signal.

2. After selecting the alarm type, press [Button A]. The hours will flash.

3. Use [Button B] to move between the values: Hours → Minutes.

4. Use [Button C] to increase the flashing value. Holding [Button C] down speeds up the adjustment.

• When using 12-hour format, ensure you set the time correctly (the 'P' indicator appears for PM times; there is no indicator for AM times).

4. After setting the hours and minutes, press [Button A] to save the alarm settings.

Turning Sound Alarms and Hourly Time Signal On/Off

1. In Sound Alarm Mode, press [Button C] to select the alarm type or hourly time signal.

2. Press [Button A] to turn the selected alarm type or hourly time signal on or off.

• The 'TR' indicator appears when the countdown timer is active.
• The 'AUTO-TR' indicator appears when the auto-repeat function is on.

Checking the Alarm Sound

Press and hold [Button C] in any mode to sound the alarm.

Countdown Timer Mode

The countdown timer can be set from 1 minute to 24 hours. A sound alarm sounds when the timer reaches zero.

Setting the Countdown Start Time

1. In Countdown Timer Mode, press [Button A]. The hours will flash.

2. Use [Button B] to cycle through the values: Hours → Minutes.

3. Use [Button C] to increase the flashing value. Holding [Button C] down speeds up the adjustment.

• To set the timer to 24 hours, set the display to 0:00'00.

4. After setting the start time, press [Button A] to return to Countdown Timer Mode.

Using the Countdown Timer

1. In Countdown Timer Mode, press [Button C] to start the timer.

2. To pause the timer, press [Button C]. To resume, press [Button C] again.

3. To stop the timer completely, press [Button C] then [Button A] to reset to the previously set time.

• The 'TR' indicator appears on the display when the countdown timer is active.

Auto-Repeat Function

1. In Countdown Timer Mode, press [Button A]. The hours will flash.

2. Press [Button L] to turn on the auto-repeat function (the 'AUTO-TR' indicator will appear).

3. Press [Button A] after completing the settings.

• When the set time is reached with the auto-repeat function on, the alarm sounds, and the countdown starts again.
• You can stop the timer by pressing [Button C] and reset it to the start time by pressing [Button A].

Stopwatch Mode

The stopwatch mode allows you to measure elapsed time, split times, and dual finishes.

• The total elapsed time range is limited to 9999 hours, 59 minutes, 59.99 seconds.
• When the maximum time is reached, the stopwatch automatically restarts from zero until you stop it.
• The 'STW' indicator appears on the display when the stopwatch function is active.

a) Measuring Split Times

Start: Press [Button C] to start.

Stop: Press [Button C] to stop.

Re-start: Press [Button C] to resume.

Clear: Press [Button A] to reset to 0:00'00.00.

(Start) → (Stop) → (Re-start) → (Stop) → (Clear)

b) Measuring Split Times with Lap Times

Start: Press [Button C].

Split: Press [Button C] to record a split time.

Split release: Press [Button C] again to display the second split time.

Stop: Press [Button A] to stop.

Clear: Press [Button B] to reset.

(Start) → (Split) → (Split release) → (Stop) → (Clear)

c) Dual Finish

Start: Press [Button C].

Split: Press [Button C] to record the first finisher's time.

Split release: Press [Button C] again to record the second finisher's time.

Stop: Press [Button A] to stop.

Clear: Press [Button B] to reset.

(Start) → (Split) → (Split release) → (Stop) → (Clear)

World Time Mode

This mode allows you to set the time for one of five time zones.

Setting the Time

1. In World Time Mode, press [Button C] to select a time zone. The selected time zone will be indicated in the upper part of the display.

2. Press [Button A] to enter setting mode. The hours will flash.

3. Use [Button B] to cycle through the values: Hours → Minutes.

4. Use [Button C] to increase the flashing value. Holding [Button C] down speeds up the adjustment.

• When using 12-hour format, ensure you set the time correctly.

5. After setting the hours and minutes, press [Button A] to save the settings.

Technical Specifications