Watch Catalog

Casio module 3512

Quartz module. 3512 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 3512

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, DST, hour, minutes, year, month, then day.
  3. On the seconds, press D to reset them to 00.
  4. On the hour, minutes, year, month or day, press D to go up and B to go down.
  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.

In 12-hour format, A marks a.m. and P marks p.m. The format you choose applies in all modes.

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

With no operation for two or three minutes, the watch saves your settings and leaves the setting screen by itself.

From Casio's guide, page EN-9

Summer time

  1. In the Timekeeping Mode, hold A until the seconds flash.
  2. Press C once: the DST setting shows.
  3. Press D to switch between summer time (On) and standard time (OF).
  4. Press A to leave the setting screen.

Good to know

The DST indicator shows on the Timekeeping and Alarm Mode screens while summer time is on.

The Dual Time has its own summer time setting, made in the Dual Time Mode.

From Casio's guide, page EN-12

Set an alarm

  1. Press C until the Alarm Mode shows (after the Stopwatch, Recall and Timer Modes).
  2. Press D to pick alarm 1, 2 or 3 (the hourly signal screen shows :00).
  3. Hold A until the hour flashes; this also switches the alarm on.
  4. Press C to step through hour, minutes, month and day; press D to go up and B to go down.
  5. For an alarm without a month, set the month to - (between 12 and 1); for one without a day, set the day to - - (between the end of the month and 1).
  6. Press A to leave the setting screen.
  7. To switch alarm 1, select it and press A to step through alarm on, snooze on, then alarm off.
  8. To switch alarm 2 or 3, or the hourly signal, select it with D and press A to turn it on or off.

Good to know

Hour and minutes only makes a daily alarm; with a month and day it sounds on that date; with a month only, every day of that month; with a day only, on that day every month.

In 12-hour format, mind a.m. (A) or p.m. (P).

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

With snooze on, alarm 1 sounds up to seven times, every five minutes, until you turn the alarm or the snooze off. Opening the Alarm 1 setting screen turns the snooze off.

Hold D in the Alarm Mode to test the alarm.

From Casio's guide, page EN-36

Light

  1. Press B in any mode (except on a setting screen) to light the display.
  2. To choose a light time of 1.5 or 3 seconds: in the Timekeeping Mode, hold A until the seconds flash, press B to switch, then press A to leave the setting screen.

Good to know

The light goes off when an alarm sounds.

Frequent use of the light runs down the battery.

From Casio's guide, page EN-45

Button tone

  1. In any mode (except 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.

The alarms and the timer alarm still sound with the button tone off.

From Casio's guide, page EN-48

Stopwatch

  1. Press C until the Stopwatch Mode shows (the mode right after the Timekeeping 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 to all zeros.
  4. To choose lap or split times: with the display at all zeros, press A to switch between the lap time screen (LAP) and the split time screen (SPL).
  5. While it runs, press A to record a lap or split time; it shows for about eight seconds while timing carries on.
  6. For two finishes: on the split time screen, press D to start, A when the first finisher crosses the line, and D when the second one does. Press A to clear it to all zeros.

Good to know

It counts up to 99 hours 59 minutes 59 seconds, then starts again from zero until you stop it.

It keeps running when you leave the Stopwatch Mode.

The memory holds 60 lap and split records; if memory fills up while several logs are stored, the oldest log and its records are deleted to make room. View them in the Recall Mode, the mode after the Stopwatch Mode.

From Casio's guide, page EN-17

Countdown timer

  1. Press C until the Timer Mode shows (after the Stopwatch and Recall Modes).
  2. If a countdown is running, press D to pause it, then A to bring back the start time.
  3. Hold A until the hours flash.
  4. Press C to step through hours, minutes and auto-repeat. On the hours or minutes, press D to go up and B to go down; set 0:00 for 24 hours. On auto-repeat, press D to switch it on (On) or off (OF).
  5. Press A to leave the setting screen.
  6. Press D to start the countdown, D to pause and D again to carry on. To stop it, pause it and press A: the start time comes back.

Good to know

The start time is one minute to 24 hours.

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

With auto-repeat on, the countdown starts again from the start time each time it reaches zero. Frequent use of auto-repeat and the alarm can run down the battery.

From Casio's guide, page EN-32

Module 3512 specs

Type
quartz
Power
Approx. battery life: 5 years on CR1620 · other watches that take CR1620
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 3512

Watches with the 3512