Watch Catalog

Casio module 3488

Quartz module. 3488 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 3488

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, hold A until the seconds flash.
  2. Press C to step through the settings: seconds, hour, minutes, 12/24-hour format, year, month, then day.
  3. On the seconds, press D to reset them to 00.
  4. On the 12/24-hour format, press D or B to switch between 12 and 24.
  5. On any other setting, press D to go up and B to go down.
  6. Press A to go back to the Timekeeping Mode.

Good to know

Resetting the seconds between 30 and 59 adds one minute.

In 12-hour format, P marks p.m.; there is no indicator for a.m. In 24-hour format, 24 shows.

The year can be set from 2000 to 2099. The day of the week follows the date by itself.

If you press no button for a few minutes while a setting flashes, the watch leaves the setting screen by itself.

From Casio's guide, page E-6

Dual Time

  1. In the Timekeeping Mode, press C until the Dual Time Mode shows (after the Countdown Timer, Stopwatch and Alarm Modes).
  2. Hold A until the hour digits flash.
  3. Press D to go up and B to go down; press C to move between the hour and the minutes.
  4. Press A to go back to the Dual Time Mode.
  5. Press C to go back to the Timekeeping Mode.

Good to know

The watch has no Home City list; the Dual Time is set as an hour and minute by hand, and its seconds follow the Timekeeping Mode.

In the Dual Time Mode, press B to switch between 12-hour and 24-hour format, separately from the Timekeeping Mode.

From Casio's guide, page E-21

Set the alarm

  1. In the Timekeeping Mode, press C until the Alarm Mode shows.
  2. Hold A until the hour digits flash; this also switches the daily alarm on.
  3. Press D to go up and B to go down; press C to move between the hour and the minutes.
  4. Press A to go back to the Alarm Mode.
  5. Press C to go back to the Timekeeping Mode.

Good to know

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

The alarm sounds for 20 seconds each day; press any button to stop it.

In the Alarm Mode, press B to step through: both off, daily alarm only, hourly time signal only, both on. The alarm on and hourly signal indicators show in all modes while they are on.

To test the sound, hold B in the Alarm Mode. Pressing B also changes the alarm and hourly signal setting, so check it afterwards.

From Casio's guide, page E-17

Light

  1. Press L in any mode to light up the display (not while a setting is flashing).

Good to know

The light goes off by itself when an alarm sounds.

Frequent use of the light runs down the battery.

From Casio's guide, page E-23

Stopwatch

  1. In the Timekeeping Mode, press C until the Stopwatch Mode shows.
  2. Press D to start, D to stop, and D again to carry on.
  3. For a split time, press B while it runs; press B again to go back to the running time.
  4. When it is stopped, press B to reset it.
  5. Press C until the Timekeeping Mode shows.

Good to know

It counts in 1/100 seconds up to 23 hours 59 minutes 59.99 seconds.

For two finishers: start with D, press B at the first finisher and D at the second; press B to see the second time, and B again to reset.

Auto-Start: while all zeros show, press B to turn it on or off (A.START shows). With it on, the watch counts down 5 seconds and the stopwatch then starts by itself.

Target time: while all zeros show, hold A, set the time with D, B and C, press A and turn it on with D or B, then press A. An alarm sounds for ten seconds when the stopwatch reaches it; press A, C or L to stop it.

From Casio's guide, page E-12

Countdown timer

  1. In the Timekeeping Mode, press C until the Countdown Timer Mode shows.
  2. If the timer is running, press D to stop it, then B to reset it to the start time.
  3. Hold A until the hour digits flash.
  4. Press D to go up and B to go down; press C to step through hour, minutes and seconds.
  5. Press A twice to go back to the Countdown Timer Mode.
  6. Press D to start; D stops and resumes it. When it is stopped, press B to reset it to the start time.

Good to know

The start time can be 1 second to 24 hours; set 0:00'00" for 24 hours. Press D and B together while setting to clear it to 0:00'00".

At zero an alarm sounds for 10 seconds; press any button to stop it. The timer then goes back to its start time.

Auto-repeat and progress beeper: hold A, press A again, switch auto-repeat with D or B, press C, switch the progress beeper with D or B, then press A.

With auto-repeat on, the countdown starts again by itself at zero; press D to stop it and B to reset it.

From Casio's guide, page E-9

Module 3488 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, 12/24-hour format
Manual
Casio's operation guide for module 3488

Watches with the 3488