How to set alarm on Casio CHR-100

1. In the Alarm Mode, display the screen of the alarm whose setting you want to change.
2. Hold down the A button for about two seconds until the hour digits of the current alarm time start to flash. This is the setting screen.

• Displaying the setting screen also turns on the alarm automatically and causes the alarm on indicator to appear on the screen.

3. Use the E (+) and B (–) buttons to change the hour setting.

• Holding down either button changes the setting at high speed.
• When setting the hour, make sure you specify AM or PM (P) correctly when using 12-hour timekeeping, or that you specify the correct 24-hour time. The same 12-hour/24-hour format you select for the Timekeeping Mode time is also applied in the Alarm Mode.
• The timekeeping system (12-hour or 24-hour) used in the Alarm Mode is the same one you select for the Timekeeping Mode.

4. Press the D button to move the flashing to the minutes.

5. Use the E (+) and B (–) buttons to change the minute setting within the range of 0 to 59.

• Holding down either button changes the setting at high speed.

6. After all the settings are the way you want, press the A button to exit the setting screen.

• The watch also will exit the setting screen automatically if you do not perform any operation for about two or three minutes.

To turn an alarm or the hourly time signal on or off

While the screen for an alarm or the hourly time signal is on the display, press the C button to toggle it on (alarm on indicator displayed) and off (indicator not displayed).

• When any alarm is turned on, the alarm on indicator is displayed in all other modes.

To stop the alarm beeper

Press any button.

To test the alarm

In the Alarm Mode, hold down the C button to sound the alarm.