CASIO MSG-140

Battery

If you notice signs of low battery power (faint display or backlight), replace the battery at the nearest CASIO dealer or distributor. The battery included with your watch is a test battery, so its service life may be shorter than a standard battery.

Water Resistance

Watches are classified by rating (from I to V) according to their water resistance. Refer to the table below to determine the rules for your watch's usage.

Notes for relevant sections:

• I. The watch is not water-resistant. Avoid any moisture.
• III. If the watch is exposed to salt water, rinse it thoroughly and dry it.
• IV. If the watch is exposed to salt water, rinse it thoroughly and dry it.
• V. The watch can be used for scuba diving (except for depths requiring a helium-oxygen mixture).

IMPORTANT!!!

Some water-resistant watches have leather straps. Do not wear these watches while swimming or engaging in any other activity where the strap may become submerged in water.

Care for your watch

• The rubber gasket that protects the watch from water and dust should be replaced every 2-3 years.
• If moisture gets inside the watch, have it checked immediately by your nearest CASIO dealer or distributor.
• Do not expose the watch to extremely high or low temperatures.
• While the watch is designed for normal use, avoid rough handling and do not drop it.
• Do not fasten the strap too tightly. A finger should fit between your wrist and the strap.
• To clean the watch and strap, use a dry soft cloth or a soft cloth dampened with a mild neutral detergent solution. Never use volatile solvents (such as gasoline, paint thinner, spray cleaners, etc.).
• When not using your watch, store it in a dry place.
• Avoid exposing the watch to gasoline, cleaning solvents, aerosol sprays, adhesives, paint, etc. Chemical reactions caused by these materials can damage gaskets, the case, and the watch's finish.
• Some models have silk-screened designs on their straps. Be careful when cleaning these straps to avoid damaging the designs.

For watches with polymer straps...

• You may notice a white powdery substance on the strap. This substance is harmless to your skin or clothing and can be easily removed by wiping with a soft cloth.
• Sweat or moisture on a polymer strap, or storage in high humidity, can lead to damage, tearing, or cracking. To ensure a long service life for the polymer strap, wipe it clean of dirt and water with a soft cloth as often as possible.

Current Time Mode

The diagram shows the overall view of the watch in Current Time Mode. It displays the day of the week, AM/PM indicator, Hour:Minute:Second, Month-Day, and World Time Code.

Press the [C] button to cycle through modes in the following sequence: Current Time Mode → World Time Mode → Day Counter Mode → Phone Book Mode → Stopwatch Mode → Countdown Timer Mode → Alarm Mode → Current Time Mode.

Press the [B] button in any mode to turn on the display backlight.

Setting Time and Date

In Current Time Mode, press the [D] button to switch the display between date and world time in the lower part of the display.

1. Press the [A] button in Current Time Mode. The seconds display will flash.
2. Press the [C] button to cycle through settings: Seconds → Daylight Saving Time (DST) → City Code → Hours → Minutes → Year → Month → Day → Backlight Color → Seconds.
3. If you select Seconds (the seconds display is flashing), press the [D] button to reset the seconds to 00. If you press [D] when the seconds are between 30 and 59, the seconds will reset to 00 and 1 will be added to the minutes. If seconds are between 00 and 29, the minutes will not change.
4. To change minutes and other values, press the [D] button to increase the values.
5. Press the [D] button to switch between 12-hour and 24-hour formats. In the 12-hour format, "P" indicates PM and "A" indicates AM.
6. Press the [D] button to select the City Code.
7. Press the [D] button to select the backlight color: 1 → 2 → 3.
8. Press the [D] button to enable or disable Daylight Saving Time (DST).
9. Press and hold the button to change values at a faster rate.
10. The day of the week is set automatically according to the date.
11. After setting the date and time, press the [A] button to return to Current Time Mode.
12. If you do not press any buttons for a certain period, the watch will automatically return to Current Time Mode.

Backlight

Press the [B] button in any mode to turn on the backlight.

The backlight automatically turns on when any audible signal sounds.

Viewing Time in Another Time Zone

In World Time Mode, press the [D] button to select the city whose time you want to view.

Enabling/Disabling Daylight Saving Time (DST)

In World Time Mode, press the [A] button to enable ("DST") or disable Daylight Saving Time.

Entering Text and Date for Day Counter

1. In Day Counter Mode, press the [D] button to select a counter.
2. Press and hold the [A] button until the cursor flashes on the display.
3. Press the [C] button to move from field to field in the following sequence: Text (first character → second character → ... → eighth character) → Year → Month → Day.
4. When the cursor is in the text field, press the [D] button to move from character to character in the following sequence: [Space] → "A-Z" → "0-9" → "." → " " → [Space].
5. After entering one character, press the [C] button to move to the next.
6. Repeat steps 4 and 5 to enter all text characters. You can enter up to 8 characters.
7. After entering text, press the [C] button to move to the date field.
8. To change the year, month, and day values, press the [D] button.
9. To move to the next character, press the [C] button.
10. Repeat steps 7 and 8 to enter the full phone number. You can enter up to 12 digits for the number.
11. After completing the setup, press the [A] button to save the entry.

You can enter a date from January 1, 1940, to December 31, 2039.

Press the [A] button to finish setup.

Viewing Counter Entries

In Day Counter Mode, press the [D] button to view counter entries.

Deleting Counter Entries

1. In Day Counter Mode, select the counter entry you want to delete.
2. Press and hold the [A] button until the cursor flashes on the display.
3. Press and hold the [D] and [B] buttons simultaneously to delete the entry. The display will show "CLR".
4. After deletion, press the [A] button.

Entering Phone Book Information

1. In Phone Book Mode, press the [D] button until a blank line appears.
2. If a blank line does not appear, the phone book memory is full, and you must delete an old entry to save new data.
3. Press and hold the [A] button until the cursor flashes on the display.
4. When the cursor is in the text field, press the [D] button to move from character to character in the following sequence: [Space] → "A-Z" → "0-9" → "." → " " → [Space].
5. After entering one character, press the [C] button to move to the next.
6. Repeat steps 3 and 4 to enter all text characters. You can enter up to 8 characters.
7. After entering text, press the [C] button to move to the date field.
8. To change the year, month, and day values, press the [D] button.
9. To move to the next character, press the [C] button.
10. Repeat steps 7 and 8 to enter the full phone number. You can enter up to 12 digits for the number.
11. After completing the setup, press the [A] button to save the entry.

Viewing Phone Book Data

In Phone Book Mode, press the [D] button to view phone book data.

Editing Phone Book Data

1. In Phone Book Mode, select the data you want to edit.
2. Press and hold the [A] button until the cursor flashes on the display.
3. Press the [C] button to move to the character you want to change.
4. Press the [D] button to change the character.
5. Press the [A] button to finish editing.

Deleting Phone Book Data

1. In Phone Book Mode, select the data you want to delete.
2. Press and hold the [A] button until the cursor flashes on the display.
3. Press and hold the [D] and [B] buttons simultaneously to delete the entry. The display will show "CLR".
4. After deletion, press the [A] button.

Measuring Split Times

Press [D] to start → Press [D] to stop → Press [D] for lap start → Press [D] to stop → Press [A] to reset.

Measuring Intermediate Results

Press [D] to start → Press [A] for intermediate result → Press [A] to resume → Press [D] to stop → Press [A] to reset.

Dual Finish

Press [D] to start → Press [A] for split (First finisher) → Press [D] for second finish (Display shows 1st finisher's time) → Press [A] to cancel split (Display shows 2nd finisher's time) → Press [A] to reset.

Setting Timer Start Time

1. Press and hold the [A] button in Timer Mode. The hour value will flash, indicating it is ready for setting.
2. Press the [C] button to cycle through settings: Hours → Minutes → Seconds → Hours.
3. Press the [D] button to increase the selected value. Holding this button will increase the value at a faster rate.
4. If you set the start time to 24 hours, set it to 0:00'00".
5. After setting the timer start time and enabling or disabling auto-repeat, press the [A] button to return to Timer Mode.

Using the Timer

1. Press the [D] button in Timer Mode to start the countdown.
2. Press the [D] button again to stop the countdown.
3. You can resume the countdown by pressing the [D] button.
4. After stopping the countdown, you can press the [A] button to reset the time to the start value.
5. When the countdown reaches zero with auto-repeat off, a 10-second audible signal sounds, which can be stopped by pressing any button. The countdown stops and automatically resets to the start value after the signal.
6. When the countdown reaches zero with auto-repeat on, an audible signal sounds, and the countdown immediately restarts from the previously set value. You can stop this countdown by pressing the [D] button and force reset to the start value by pressing the [A] button.

Enabling/Disabling Auto-Repeat Function

1. In Countdown Timer Mode, press the [A] button. The hour digits will flash.
2. Press the [B] button to enable or disable the auto-repeat function.
3. After completing the settings, press the [A] button to return to Timer Mode.

Setting the Alarm

1. In Alarm Mode, press and hold the [A] button. The hour value will flash, indicating it is ready for setting. The alarm is automatically enabled at this point.
2. Press the [C] button to cycle through settings: City Code → Hours → Minutes → City Code.
3. When in the City Code field, press the [D] button to switch between your home time ("HOME") and the time in another time zone ("WORLD").
4. Press the [D] button to increase the hour and minute values. Holding the button will increase the values at a faster rate.
5. The format (12-hour or 24-hour) matches the format you selected for the current time.
6. If you are using the 12-hour format, be careful to set the time correctly for AM or PM.
7. After completing the setup, press the [A] button to return to Alarm Mode.

Stopping the Alarm Sound

Press any button to stop the alarm.

Enabling/Disabling Alarm and Hourly Chime

In Alarm Mode, press the [D] button to cycle through settings: All On → All Off → Daily Alarm Only → Hourly Chime Only.

Checking Alarm Sound

Press the [D] button to check the alarm sound.