Casio F-91W cheat sheet

Setting the alarm

Press C from the main timekeeping screen, and AL will appear at the top middle of the display to indicate you are on the alarm screen.

Turning the alarm on or off, and turning hourly signal on or off

From the alarm screen, press A. Depending on how the alarm/signal is set, one of four will be displayed:

Nothing at top left: Alarm is OFF, hourly signal is OFF.

Audio wave icon at top left: Alarm is ON, hourly signal is OFF.

Bell icon at top left: Alarm is OFF, hourly signal is ON.

Audio wave icon and bell icon at top left: Alarm is ON, hourly signal is ON.

You can go through each one of these by repeatedly pressing A.

Note: When the alarm is ON, the watch will sound a beep for 20 seconds at alarm time you have set. When the hourly signal is ON, this is not an alarm. The hourly signal is a double beep you will hear at the top of every hour.

Testing the alarm tone

From the alarm screen, press and hold A. In about 2 seconds, you will hear the alarm tone test. Let go of A to stop the test.

Setting the alarm time

From the alarm screen, press L.

The alarm hour will blink. Press A to adjust the alarm hour.

Press L again. The alarm minutes will blink. Press A to adjust the minutes.

Press L again to stop all blinking. The alarm time is now set.

Note: In 12-hour time, afternoon hours are indicated by a PM at the top left of the display. If no PM is present, a morning hour is set.

Using the stopwatch

Press C repeatedly until ST appears at the top middle of the display.

Press A to start the stopwatch. Press A again to stop the stopwatch.

Press L to reset the stopwatch to 00:00.00

Using the lap feature

This feature is to measure lap times and/or use for recording first and second runner finishes.

Press A to start the stopwatch. Press L. LAP will appear on the display. The stopwatch freezes the recorded time but is still running in the background. Press L again to go back to the stopwatch. From this point you can press A to stop and then L to reset to zero.

Measuring first and second runner finishes is as follows: Press A to start the stopwatch. When you want to record the first runner's time, press L. When you want to record the second runner's time, press A. After that, what is on the display is the first runner's time. Press L to see the second runner's time. Then press L again to reset to zero.

Published 2019 Nov 21