Watch Catalog

Casio module 3484

Quartz module. 3484 is the number engraved on the caseback of these watches, and Casio files its operation manual under it. 1 watch in the catalog runs on it.

How to operate module 3484

Short steps in our words. The buttons are lettered as in Casio's operation guide, where each task's page is given.

Set the time and date

  1. In the Timekeeping Mode, press D until the Home City Time (T-1) screen shows.
  2. Hold A until the seconds flash.
  3. Press C to step through the settings: seconds, DST, city code, hour, minutes, 12/24-hour format, year, month, day, then light duration.
  4. On the seconds, press D to reset them to 00.
  5. On the city code, press D to go east and B to go west.
  6. On the hour, minutes, year, month or day, press D to go up and B to go down.
  7. On the DST, the 12/24-hour format or the light duration, press D to switch it.
  8. Press A to exit the setting screen.

Good to know

Only the Home City Time (T-1) can be set; for the Local Times T-2, T-3 and T-4 you can only change the city code and DST.

Resetting the seconds between 30 and 59 adds one minute.

In 12-hour format, P marks p.m.

The day of the week follows the date by itself. The year runs from 2000 to 2099.

From Casio's guide, page E-9

Summer time

  1. In the Timekeeping Mode, press D until the Home City Time (T-1) screen shows.
  2. Hold A until the seconds flash.
  3. Press C to show the DST setting.
  4. Press D to switch between summer time (On) and standard time (OFF).
  5. Press A to exit the setting screen.

Good to know

The DST indicator shows on the Timekeeping screen while summer time is on.

Summer time moves the time one hour ahead of standard time.

From Casio's guide, page E-12

Change your Home City

  1. In the Timekeeping Mode, press D to show the Local Time (T-2, T-3 or T-4) you want as your new Home City Time.
  2. Press A and B together: that Local Time becomes your Home City Time.
  3. Or, in the World Time Mode, press D until the city you want shows, then press A and B together to make it your Home Time city.

Good to know

To change a Local Time city: show that Local Time, hold A for about two seconds until the city code flashes, press D (east) or B (west), press C for its DST setting and D to switch it, then press A.

The Home City code can also be changed in the time setting screen.

From Casio's guide, page E-14

Set an alarm

  1. Press C until the Alarm Mode shows (after the World Time Mode).
  2. Press D until the alarm number you want (1 to 5) shows.
  3. Hold A until the hour flashes; this also switches the alarm on as a one-time alarm.
  4. Press D to go up and B to go down; press C to step through the hour, the minutes and the one-time/daily setting.
  5. On the one-time/daily setting, press D to switch between 1-On (one-time) and On (daily).
  6. Press A to exit the setting screen.
  7. To switch an alarm off or on, select it with D in the Alarm Mode and press A: it steps through OFF, 1-On (one-time) and On (daily).

Good to know

In 12-hour format, mind a.m. or p.m.: P marks p.m.

The alarm sounds for 10 seconds in any mode; press any button to stop it.

A one-time alarm sounds once and then switches itself off.

Hold D in the Alarm Mode to test the alarm sound.

The hourly time signal (:00 in the Alarm Mode) beeps twice every hour; select it with D and press A to switch it on or off.

From Casio's guide, page E-20

Light

  1. Press B in any mode (not on a setting screen) to light the display.

Good to know

The light stays on for about 1.5 or 3 seconds, as set in the time setting screen.

The light goes off when an alarm sounds.

Frequent use of the light runs down the battery.

From Casio's guide, page E-15

Button tone on or off

  1. In any mode (not on a setting screen), hold C to switch the button tone on or off.

Good to know

The mute indicator shows in all modes while the button tone is off.

Holding C also changes the mode.

With the button tone off, the alarms, the hourly time signal and the countdown alarm still sound.

From Casio's guide, page E-32

Stopwatch

  1. Press C until the Stopwatch Mode shows (after the Countdown Timer Mode).
  2. Press D to start, D to stop, and D again to carry on.
  3. When it is stopped, press A to reset it to zero.
  4. For a split time, press A while it runs (SPL shows); press A again to let the display catch up.
  5. For two finishes: press D to start, A when the first runner finishes, D when the second runner finishes, A to show the second time, then A to reset.

Good to know

It counts up to 23 hours 59 minutes 59.99 seconds, then starts again from zero until you stop it.

It keeps running if you leave the Stopwatch Mode.

From Casio's guide, page E-29

Countdown timer

  1. Press C until the Countdown Timer Mode shows (after the Alarm Mode).
  2. With the start time on the display, hold A until it flashes.
  3. Press C to step through hours, minutes and seconds; press D to go up and B to go down.
  4. Press A to exit the setting screen.
  5. Press D to start, D to pause and D to carry on.
  6. To stop it completely, pause it with D, then press A: it goes back to the start time.

Good to know

The start time is one second to 24 hours; set 0:00 00 for 24 hours.

At zero the alarm sounds for ten seconds; press any button to stop it. The countdown goes back to the start time by itself.

From Casio's guide, page E-26

Module 3484 specs

Type
quartz
Power
Approx. battery life: 10 years on CR2025 · other watches that take CR2025
Accuracy
±30 seconds per month
Functions
World time, Stopwatch, Timer, Alarm/hourly time signal, Light, Light color, Calendar, Mute feature, 12/24-hour format
Manual
Casio's operation guide for module 3484

Watches with the 3484