Watch Catalog

Casio module 5427

Solar powered module. 5427 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 5427

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: SET shows, then the Home Time City name.
  2. Press D six times until the seconds flash.
  3. Press E to reset the seconds to 00.
  4. Press D: the hour flashes. Press B or E to change it.
  5. Press D to step through hour, minute, year, month, day and seconds; change each with B or E.
  6. Press A twice to exit the setting screen.
  7. To switch between 12-hour and 24-hour format: hold A for about two seconds, press D four times until 12H or 24H flashes, press E to toggle, then press A twice.
  8. To take the time from a paired phone now: with the CASIO WATCH+ app open, hold C for about 0.5 seconds until the second hand points to R.

Good to know

While connected to a phone, the watch adjusts its date and time to the phone; the app can also schedule an auto adjust time each day.

If the seconds are between 30 and 59 when you press E, one minute is added.

In 12-hour format, P shows for p.m. times.

From Casio's guide, page 10

Summer time

  1. In the Timekeeping Mode, hold A for about two seconds: SET shows, then the Home Time City name.
  2. Press D to go to the summer time setting.
  3. Press E to cycle through AT (switches by itself), -- (always standard time) and On (always summer time).
  4. Press A twice to exit the setting screen.

Good to know

The watch comes set to AT; even where summer time is not observed, you can leave it on AT.

DST shows while summer time is in effect.

The Home Time City summer time can also be changed in the CASIO WATCH+ app under Watch settings. World Time cities have their own summer time setting, made in the World Time section.

From Casio's guide, page 9

Home City

  1. In the Timekeeping Mode, hold A for about two seconds: SET shows, then the Home Time City name.
  2. Press B or E until the city you want shows; hold either button to scroll fast.
  3. Press A twice to exit the setting screen.

Good to know

The watch has 40 built-in cities. If yours is not among them, pick one with the same time offset.

When the watch connects to a phone, the Home Time City is taken from the phone.

In the Timekeeping Mode, hold E for about three seconds to swap your Home Time with the World Time on the small hands, for example after a flight.

From Casio's guide, page 9

Set an alarm

  1. Press D until the Alarm Mode shows (after the Stopwatch and Timer Modes).
  2. Press E until the alarm you want shows, AL1 to AL5.
  3. Hold A for about two seconds: SET shows, then the alarm time with the hour flashing.
  4. Press D to move between the hour and the minutes; press B or E to change them.
  5. Press A to exit the setting screen, then D to go back to the Timekeeping Mode.
  6. To turn an alarm off: in the Alarm Mode, press E until it shows, then press A: the second hand moves to OFF.

Good to know

Press any button to stop a sounding alarm.

In the Alarm Mode the second hand points to ON or OFF to show the selected alarm's status. ALM shows when any alarm is on.

Alarms can also be set in the CASIO WATCH+ app.

From Casio's guide, page 13

Realign the hands

  1. In the Timekeeping Mode, hold A for about five seconds: H.SET shows, then SUB flashes.
  2. If the small hour and minute hands are not at 12 o'clock, move them there with B or E; hold for high speed.
  3. Press D, then move the hour and minute hands to 12 o'clock with B or E.
  4. Press D, then move the second hand to 12 o'clock with B or E.
  5. Press A to go back to the Timekeeping Mode.

Good to know

Strong magnetism or impact can make the hands differ from the digital display.

Buttons do not work while the hands are moving.

The CASIO WATCH+ app can also adjust the home positions (Watch settings, Adjusting home positions).

From Casio's guide, page 14

Light

  1. Press B in any mode to turn on the light.
  2. To choose 1.5 or 3 seconds: in the Timekeeping Mode, hold A for about two seconds, press D three times until LT1 or LT3 flashes, press E to toggle, then press A twice.

Good to know

The light may flicker while there is a Bluetooth connection.

The light turns off when an alert operation starts.

From Casio's guide, page 14

Button tone

  1. In the Timekeeping Mode, hold A for about two seconds: SET shows, then the Home Time City name.
  2. Press D twice until KEY♪ or MUTE flashes.
  3. Press E to toggle: KEY♪ turns the button tone on, MUTE turns it off.
  4. Press A twice to exit the setting screen.

From Casio's guide, page 14

Stopwatch

  1. Press D until the Stopwatch Mode shows (the mode right after the Timekeeping Mode).
  2. Press E to start, E to stop, E again to carry on.
  3. For a split time, press A while it runs; press A again to release the split.
  4. When it is stopped, press A to reset it to all zeros.
  5. Press D three times to go back to the Timekeeping Mode.

Good to know

It counts up to 23 hours 59 minutes 59 seconds.

While a split time shows, SPL alternates with it on the dot display.

From Casio's guide, page 12

Timer

  1. Press D until the Timer Mode shows (after the Stopwatch Mode).
  2. If a countdown is running, press E to stop it, then A to reset it to the start time: the start time cannot be changed while a countdown is in progress.
  3. Hold A for about two seconds: SET shows and the hour digits flash.
  4. Press D to move between the hours and minutes; press B or E to change them.
  5. Press A to exit the setting screen.
  6. Press E to start the countdown; E pauses and resumes it.
  7. Press D twice to go back to the Timekeeping Mode.

Good to know

The start time is one minute to 24 hours, in one-minute steps; 0:00 means 24 hours.

At the end of the countdown the watch performs an alert; press any button to stop the tone.

The timer can also be configured in the CASIO WATCH+ app.

From Casio's guide, page 12

Module 5427 specs

Type
solar
Power
Solar powered
Accuracy
±15 seconds per month
Functions
World time, Stopwatch, Timer, Alarm/hourly time signal, Light, Light color, Calendar, Mute feature, Energy saving feature, Battery display/alert, Run time, 12/24-hour format, Hand shift feature, Airplane mode
Manual
Casio's operation guide for module 5427

Watches with the 5427