Watch Catalog

Casio module 3240

Quartz module. 3240 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 3240

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 other settings, press D to increase the value (hold for fast).
  5. Press A to leave the setting screen.

Good to know

Resetting the seconds between 30 and 59 adds one minute.

In the Timekeeping Mode, press D to switch between 12-hour and 24-hour format.

From Casio's guide, page E-6

Set an alarm

  1. Press C to enter the Alarm Mode, then press D to show the alarm screen.
  2. Hold A until the alarm hour flashes; this turns on the one-time alarm.
  3. Press C to move through hour, minutes, month and day, and press D to increase each one.
  4. For an alarm that ignores the month or day, press D until the dash mark shows in that setting.
  5. Press A to leave the setting screen.

Good to know

In the Alarm Mode on the alarm screen, press A to cycle through alarm off, one-time alarm and snooze alarm.

Hold D in the Alarm Mode to test the sound; on the :00 screen, press A to turn the hourly signal on or off.

From Casio's guide, page E-11

Light

  1. Press B in any mode: the display lights for about one second.

From Casio's guide, page E-21

Stopwatch

  1. Press C to reach the Stopwatch Mode (ST).
  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; press A again to release the split.

Good to know

It counts up to 23 hours 59 minutes 59.99 seconds and keeps running if you leave the mode.

From Casio's guide, page E-18

Module 3240 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, Calendar, 12/24-hour format
Manual
Casio's operation guide for module 3240

Watches with the 3240