Watch Catalog

Casio module 5555

Quartz module. 5555 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 5555

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 for about two seconds and let go when SET stops flashing: the daily step target flashes.
  2. Press C to step through the settings: daily step target, seconds, hour, minute, 12/24-hour format, year, month, day, button tone, then light duration.
  3. On the seconds, press D to reset them to 00.
  4. On any other setting, use D and B to change it.
  5. Press A to leave the setting screen.

Good to know

Resetting the seconds between 30 and 59 adds one minute.

For the 12/24-hour format, press C four times from the step target until 12H or 24H flashes, then press D to switch. In 12-hour format, P marks p.m.

If the hands do not show the same time as the digital display, realign them (see Realign the hands).

When the watch is connected to a phone running CASIO WATCHES, the time is set for you; the watch connects by itself four times a day on a preset schedule.

Setting the time by hand on the watch cancels the automatic switching between standard time and summer time.

In any mode, hold C for about two seconds to go to the Timekeeping Mode.

From Casio's guide, page 18

Summer time

  1. Open the CASIO WATCHES app on your phone.
  2. On the watch, hold D for about two seconds; the Bluetooth mark flashes, then stops flashing once the watch is connected.
  3. In the app, follow the screen to change your Home City summer time setting.

Good to know

The watch has no button setting for summer time; it is set from the app.

DST shows on the display while the current time is summer time.

From Casio's guide, page 8

Dual Time and swapping it with your home time

  1. In the Timekeeping Mode, press C until the Dual Time Mode shows (DT, after the Timer Mode).
  2. Hold A for about two seconds: the hour flashes. Use D and B to change it.
  3. Press C: the minutes flash. Use D and B to change them, in 15-minute steps.
  4. Press A to leave the setting screen.
  5. To swap your Home City time with the Dual Time, for example when you arrive in another time zone, hold B for about two seconds in the Dual Time Mode.
  6. Hold C for about two seconds to go back to the Timekeeping Mode.

Good to know

The watch has no Home City setting of its own. The World Time city shown in the Dual Time Mode can also be picked in the CASIO WATCHES app, from about 300 cities, and the app can swap the Home Time and World Time.

Auto time adjustment does not work for 24 hours after the Home Time and World Time are swapped.

From Casio's guide, page 16

Set an alarm

  1. In the Timekeeping Mode, press C until the Alarm Mode shows (AL, after the Dual Time Mode).
  2. Press D until the alarm you want shows, AL1 to AL5.
  3. Hold A for about two seconds: the hour flashes.
  4. Use D and B to set the hour; in 12-hour format, P marks p.m.
  5. Press C: the minutes flash. Use D and B to set them.
  6. Press A to leave the setting screen.
  7. Check that On shows next to the alarm time; if - - shows, press B to switch the alarm on.
  8. Hold C for about two seconds to go back to the Timekeeping Mode.

Good to know

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

In the Alarm Mode, press D to pick an alarm or SIG (hourly time signal) and B to switch it between On and - - (off).

The alarm mark shows on the display while one or more alarms are on.

From Casio's guide, page 17

Realign the hands

  1. In the Timekeeping Mode, hold A for about five seconds, until 12:00 flashes on the display.
  2. If the hour and minute hands are not at 12 o'clock, use D and B to move them there.
  3. Press A to leave the setting screen.

Good to know

Strong magnetism or impact can put the hands out of step with the digital time.

If the hands are still off even though auto time adjustment works, connect to the CASIO WATCHES app and correct the hand alignment there.

To move the hands out of the way of the display, hold L and press C (HND shows); press C to bring them back.

From Casio's guide, page 19

Light

  1. Press L to light the face.
  2. In the Timekeeping Mode, hold L for about three seconds to switch Auto Light on or off (LT shows while it is on).
  3. To change how long the light stays on, hold A in the Timekeeping Mode until SET stops flashing, press C nine times until LT shows, then press D to choose 1 (1.5 seconds) or 3 (3 seconds).
  4. Press A to leave the setting screen.

Good to know

With Auto Light on, the face lights when you turn the watch 40 degrees or more toward you. Auto Light switches itself off after about six hours.

The light goes off when an alarm starts to sound.

From Casio's guide, page 18

Button tone

  1. In the Timekeeping Mode, hold A for about two seconds and let go when SET stops flashing.
  2. Press C eight times until the note mark shows.
  3. Press D to switch between On (button tone on) and OFF (button tone off).
  4. Press A to leave the setting screen.

From Casio's guide, page 20

Stopwatch

  1. In the Timekeeping Mode, press C once: the Stopwatch Mode shows (ST).
  2. Press D to start, D to stop, and D again to resume.
  3. When it is stopped, press B to reset it to zero.
  4. For split or lap times, before you start press A until SPL or LAP shows, then start it with D and press B for each reading.
  5. Hold C for about two seconds to go back to the Timekeeping Mode.

Good to know

It counts in 1/100 seconds for the first hour, then in seconds, for up to 24 hours.

Each split or lap time shows for eight seconds. Up to 200 records are kept; view them in the Recall Mode, the mode after the Stopwatch Mode.

From Casio's guide, page 11

Countdown timer

  1. In the Timekeeping Mode, press C until the Timer Mode shows (TR, after the Recall Mode).
  2. If the timer is running, press D to pause it, then B to reset it to its start time.
  3. Hold A for about two seconds, then use D and B to set the number of repeats.
  4. Press C, then use D and B until 1 shows.
  5. Press C: the minutes flash. Use D and B to set them.
  6. Press C: the seconds flash. Use D and B to set them.
  7. Press A to leave the setting screen.
  8. Press D to start, D to pause, and D to resume. To stop it, pause it and press B to reset it to the start time.

Good to know

The start time can be set in 1-second steps up to 60 minutes.

The watch beeps every second for the last five seconds of the countdown; it does not beep when the battery is low.

For a five-second pre-count before the countdown, press B in the reset state to enable Auto Start, then press D.

Up to five timers can be set as an interval timer, each repeated up to 20 times; the CASIO WATCHES app can also set them.

The watch cannot connect with a phone while 30 seconds or less remain on a countdown; stop the countdown first.

From Casio's guide, page 15

Module 5555 specs

Type
quartz
Power
Approx. battery life: 2 years on CR2016 · other watches that take CR2016
Accuracy
±15 seconds per month (with no mobile link function)
Functions
World time, Stopwatch, Timer, Alarm/hourly time signal, Light, Light color, Calendar, Mute feature, 12/24-hour format, Hand shift feature
Manual
Casio's operation guide for module 5555

Watches with the 5555