Watch Catalog

Casio module 3239

Quartz module. 3239 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 3239

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, year, month, day.
  3. On the seconds, press D to reset them to 00.
  4. On the hour, minutes, year, month or day, press D to count up (hold for fast).
  5. Press A to leave the setting screen.
  6. To switch between 12-hour and 24-hour format, press D in the Timekeeping Mode.

Good to know

Resetting the seconds between 30 and 59 adds one minute.

The day of the week follows the date by itself, and the calendar knows month lengths and leap years (years 2000 to 2099).

Hold C for about one second in any mode to return to the Timekeeping Mode.

From Casio's guide, page E-6

Set an alarm

  1. Press C until the Alarm Mode shows (AL), the mode after the Timekeeping Mode, then press D until the alarm time shows (not the :00 hourly signal screen).
  2. Hold A until the hour flashes; this also switches the one-time alarm on.
  3. Press C to step through hour, minutes, month and day, and press D to count up each one (hold for fast).
  4. For an alarm without a month (daily or monthly), press D on the month until the - mark shows, between 12 and 1.
  5. For an alarm without a day (daily or 1-month), press D on the day until the - - mark shows, between the month's last day and 1.
  6. Press A to leave the setting screen.

Good to know

In 12-hour format, watch the P indicator: it marks p.m.

On the alarm screen, press A to cycle alarm off, one-time alarm, snooze alarm (it repeats up to seven times, every five minutes).

On the :00 screen (press D in the Alarm Mode), press A to turn the hourly signal on or off.

The alarm sounds for about 10 seconds; press any button to stop it. To end a snooze, open the alarm screen and press A to switch the alarm off or to one-time.

In the Alarm Mode, hold D to test the sound.

From Casio's guide, page E-11

Light

  1. Press B in any mode to light the display for about one second.

Good to know

The light goes off by itself when an alarm sounds.

From Casio's guide, page E-21

Stopwatch

  1. Press C until the Stopwatch Mode shows (ST), after the Alarm Mode.
  2. Press D to start, D to stop, and D again to carry on.
  3. When it is stopped, press A to clear it.
  4. For a split time, press A while it runs (SPL shows); press A again to release it.
  5. For two finishes: start with D, press A when the first finishes, D when the second finishes, then A to see the second time and A again to clear.

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 when you leave the Stopwatch Mode.

From Casio's guide, page E-18

Module 3239 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, Alarm/hourly time signal, Light, Light color, Calendar, 12/24-hour format
Manual
Casio's operation guide for module 3239

Watches with the 3239