CASIO MA1904-EA Watch User Guide

Operation Guide 3472/3479

About This Manual

• Depending on the model of your watch, display text appears either as dark figures on a light background, or light figures on a dark background. All sample displays in this manual are shown using dark figures on a light background.
• Button operations are indicated using the letters shown in the illustration.
• Each section of this manual provides you with the information you need to perform operations in each mode.
• Note that the product illustrations in this manual are intended for reference only, and so the actual product may appear somewhat different than depicted by an illustration.

General Guide

• Press B to change from mode to mode.
• After you perform an operation in any mode, pressing B returns to the Timekeeping Mode.
• The watch returns to the Timekeeping Mode automatically if you do not perform any button operation for one or two minutes in the Alarm Mode and Time Setting Mode.
• In any mode, press A to illuminate the display.

Timekeeping

Use the Timekeeping Mode to view the current time and date.

• The day of the week is displayed as follows.
  SU: Sunday
  TU: Tuesday
  TH: Thursday
  SA: Saturday| MO: Monday
  WE: Wednesday
  FR: Friday
  ---|---
• The watch does not make any allowance for leap years. Be sure to manually set February 29 when one occurs during a leap year.

To toggle between 12-hour and 24-hour timekeeping
In the Timekeeping Mode, press C to switch between the 12-hour and 24-hour formats.

• With the 12-hour format, the PM indicator appears for times in the range of noon to 11:59 p.m. and no indicator appears for times in the range of midnight to 11:59 a.m.
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, with a 24H indicator.

Alarm

When the Daily Alarm is turned on, the alarm sounds for 20 seconds at the preset time each day. When the Hourly Time Signal is turned on, the watch beeps every hour on
the hour.
All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing B (page E-4).

To set the alarm time

1. In the Alarm Mode, press A. The hour digits flash because they are selected.
   • This operation automatically turns on the alarm.

2. Press A to change the selection in the following sequence.

3. Press C to increase the selected digits. Holding down C changes the number at high speed.
   • The format (12-hour and 24-hour) of the alarm time matches the format you select for normal timekeeping.
   • When setting the alarm time using the 12-hour format, take care to set the time correctly as morning or afternoon ( PM ).

4. After you set the alarm time, use A to return to the Alarm Mode.
   • If you do not operate any button for one or two minutes while a selection is flashing, the flashing stops and the watch goes back to the Timekeeping Mode automatically.

To stop the alarm
Press any button to stop the alarm after it starts to sound.

To switch the Daily Alarm and Hourly Time Signal on and off
Press C while in the Alarm Mode to change the status of the Daily Alarm and Hourly Time Signal in the following sequence.

Stopwatch

The Stopwatch Mode lets you measure elapsed time, split times, and two finishes. The range of the stopwatch is 59 minutes, 59.99 seconds.

• The stopwatch continues to run, restarting from zero after it reaches its limit until you stop it.
• An ongoing elapsed time measurement operation will continue internally even if you change to another mode. However, if you exit the Stopwatch Mode while a split time is displayed, the split time will not be displayed when you return to the Stopwatch Mode.
• All of the operations in this section are performed in the Stopwatch Mode, which you enter by pressing B (page E-5).

To measure times with the stopwatch
(a) Elapsed time measurement

(b) Split time measurement

(c) Split time and 1st-2nd place times

Time Setting

Use the Time Setting Mode to set the current time and date.

To set the time and date

1. Use B to enter the Time Setting Mode (page E-5).
   • The second’s digits flash because they are selected.

2. Press A to change the selection in the following sequence.

3. While the second’s digits are selected (flashing), press C to reset the seconds to . If you press C while the second’s count is in the range of 30 to 59, the seconds are reset to and 1 is added to the minutes. If the second’s count is in the range of 00 to 29, the minute’s count is unchanged.

4. While any other digits (besides seconds) are selected (flashing), press C to increase the number. While the day of the week is selected, pressing C advances to the next day. Holding down C changes the current selection at high speed.

5. After you set the time and date, press B to return to the Timekeeping Mode.
   • If you do not operate any button for one or two minutes while a selection is flashing, the flashing stops and the watch goes back to the Timekeeping Mode automatically.

Specifications

Accuracy at normal temperature: ±30 seconds a month
Timekeeping: Hour, minutes, seconds, p.m., day, any day of the week
Time system: Switchable between 12-hour and 24-hour formats
Calendar system: Auto-calendar set at 28 days for February
Alarm: Daily alarm, Hourly time signal
Stopwatch
Measuring units: 1/100 seconds
Measuring capacity: 59 minutes, 59.99 seconds
Measuring modes: Elapsed time, split time, and two finishes
Illumination: LED (light-emitting diode)
Battery: One lithium battery
Type: CR1616
Battery life: Approx. 3 years

• 1 second of illumination operation per day
• 20 seconds of alarm operation per day

Specifications are subject to change without notice.

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