Watch Catalog

Casio module 3485

Quartz module. 3485 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 3485

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 twice to leave: the first press shows the UTC differential screen, the second exits.

Good to know

Set the Home Site data too: the Moon phase and fishing level indicators are worked out from the time, date and Home Site.

Resetting the seconds between 30 and 59 adds one minute; from 00 to 29 the minutes stay as they are.

In the Timekeeping Mode, press D to switch between 12-hour and 24-hour format; P marks p.m. The format applies in all modes.

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

Press C to change modes: Timekeeping, Fishing/Moon, Stopwatch, Countdown Timer, Alarm, Dual Time.

From Casio's guide, page E-9

Daylight saving 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 On (summer time) and OF (standard time).
  4. Press A twice to leave the setting screen.

Good to know

The DST indicator shows on the Timekeeping, Fishing/Moon (fishing level screen only) and Alarm Mode screens while summer time is on.

Summer time moves the time one hour ahead of standard time.

From Casio's guide, page E-12

Home Site

  1. In the Timekeeping Mode, hold A until the seconds flash.
  2. Press A again: the UTC differential setting shows.
  3. Press C to step through the settings: UTC differential, longitude value, then east or west longitude.
  4. On the UTC differential or the longitude value, press D (+) or B (-) to change it.
  5. On east or west longitude, press D to switch between E and W.
  6. Press A to leave the setting screen.

Good to know

The UTC differential runs from -12.0 to +14.0 in half-hour steps (-11.0 to +15.0 while DST is on); the longitude runs from 0 to 180 degrees.

The factory setting is Tokyo: UTC +9.0, east 140 degrees. It comes back after a battery change.

The Moon phase, fishing level and Fishing/Moon Mode data are wrong unless the Home Site is set right. The manual's Site Data List gives the values for cities around the world.

For a second time zone, use the Dual Time Mode: press C until it shows, hold A until DST flashes, press D to switch DST, press C to move to the hour and minutes, set them with D (+) and B (-), then press A to leave.

From Casio's guide, page E-14

Set an alarm

  1. Press C until the Alarm Mode shows.
  2. Press D to scroll through the alarms, -1, -2 and -3, until the one you want shows.
  3. Hold A until the hour flashes; this also switches the alarm on.
  4. Press C to step through hour, minutes, month and day, and press D (+) or B (-) to change each one; mind the P indicator for p.m.
  5. For an alarm every day, set the month to - (between 12 and 1) and the day to - - (between the last day of the month and 1).
  6. Press A to leave the setting screen.

Good to know

Leave out the month for a monthly alarm, or the day for an alarm every day of one month; set both for an alarm on one date.

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

To switch Alarm 2 or 3 or the hourly time signal (:00) on or off, select it with D in the Alarm Mode and press A.

Alarm 1 has a snooze: select it and press A to step through alarm on, snooze on (SNZ) and alarm off. The snooze repeats every five minutes, up to seven times, until you turn it off.

To test the alarm, hold D in the Alarm Mode.

From Casio's guide, page E-31

Light

  1. Press B in any mode to light up the face (not while a setting screen is on).
  2. To change how long it stays on: in the Timekeeping Mode hold A until the seconds flash, then press B to switch between 1.5 seconds and 3 seconds.
  3. Press A twice to leave the setting screen.

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-38

Button beep

  1. In any mode (not while a setting screen is on), hold C to switch the button tone on or off.
  2. While the tone is off, the mute indicator shows in all modes.

Good to know

Holding C also changes the mode.

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

From Casio's guide, page E-42

Stopwatch

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

Good to know

It counts in 1/100 seconds up to 23 hours 59 minutes 59.99 seconds, then starts again from zero until you stop it.

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

It keeps running when you change to another mode.

From Casio's guide, page E-24

Countdown timer

  1. Press C until the Countdown Timer Mode shows.
  2. If the timer is running, press D to pause it, then A to reset it to the start time.
  3. Hold A until the hours flash.
  4. Press C to step through hours, minutes and auto-repeat.
  5. On the hours or minutes, press D (+) or B (-); on auto-repeat, press D to switch between On and OF.
  6. Press A to leave the setting screen.
  7. Press D to start; D pauses and resumes it. When it is paused, press A to reset it to the start time.

Good to know

The start time can be 1 minute to 24 hours; set 0:00 for 24 hours.

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

With auto-repeat on, the countdown starts again by itself at zero. Frequent use of auto-repeat and the alarm can run down the battery.

The countdown keeps running when you change to another mode.

From Casio's guide, page E-27

Module 3485 specs

Type
quartz
Power
Approx. battery life: 10 years on CR2025 · other watches that take CR2025
Accuracy
±30 seconds per month
Functions
World time, Moon data, Stopwatch, Timer, Alarm/hourly time signal, Light, Light color, Calendar, Mute feature, 12/24-hour format, Fishing mode
Manual
Casio's operation guide for module 3485

Watches with the 3485