Watch Catalog

Casio module 3489

Quartz module. 3489 is the number engraved on the caseback of these watches, and Casio files its operation manual under it. 6 watches in the catalog run on it.

How to operate module 3489

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 A: the seconds flash.
  2. Press C to move through the settings: seconds, hour, minutes, year, month, then day.
  3. On the seconds, press B to reset them to 00.
  4. On any other setting, press B to count up (hold for fast).
  5. While any digits flash, press D to switch between 12-hour and 24-hour format.
  6. Press A to go back to 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; the calendar runs from 2000 to 2099.

From Casio's guide, page E-6

Set an alarm

  1. Press C once to go from the Timekeeping Mode to the Alarm Mode.
  2. Press A until the hour digits flash; the alarm is switched on.
  3. Press C to move through hour, minutes, month and day.
  4. Press B to count up the flashing digits (hold for fast); in 12-hour format, PM marks p.m. on the hour.
  5. For a daily alarm, set the month and day to dashes.
  6. Press A to go back to the Alarm Mode.

Good to know

In the Alarm Mode, each press of B steps through: both off, alarm only, hourly signal only, both on.

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

From Casio's guide, page E-11

Light

  1. Press D in any mode to light the display; it goes off about two seconds after you let go.
  2. To make the light flash with alarms, the timer and the hourly signal, hold B for about two seconds in the Timekeeping Mode to turn Flash Alert on or off.

Good to know

The Flash Alert indicator shows in all modes while it is on.

From Casio's guide, page E-8

Stopwatch

  1. Press C three times from the Timekeeping Mode to reach the Stopwatch Mode.
  2. Press B to start, B to stop, and B again to carry on.
  3. When it is stopped, press A to clear it to zero.
  4. For a split time, press A while it runs; press A again to let the display catch up.

Good to know

It counts to 23 hours 59 minutes 59 seconds; after the first hour it shows hours, minutes and seconds.

From Casio's guide, page E-18

Countdown timer

  1. Press C twice from the Timekeeping Mode to reach the Countdown Timer Mode.
  2. Press A: the hours flash.
  3. Press C to move through hours, minutes and seconds, and B to count up (hold for fast).
  4. Press A to finish setting.
  5. Press B to start and stop the countdown.
  6. When it is stopped, press A to go back to the starting time.

Good to know

The timer runs from one second to 24 hours; set 0:00'00 for 24 hours.

For auto repeat, press A in the Countdown Timer Mode, press D to turn it on or off, then press A.

From Casio's guide, page E-14

Module 3489 specs

Type
quartz
Power
Approx. battery life: 2 years on CR1616 · other watches that take CR1616
Accuracy
±15 seconds per month
Functions
Stopwatch, Timer, Alarm/hourly time signal, Flash alert feature, Light, Light color, Calendar, 12/24-hour format
Manual
Casio's operation guide for module 3489

Watches with the 3489