Casio 1977 User Manual

Module No.1977

1977-1

GENERAL GUIDE

• Press CCto change from mode to mode.

• In the Timekeeping Mode and Alarm Mode, press DDto illuminate the display for about two seconds. In the Countdown Alarm Mode and Stopwatch Mode, press EEto illuminate the display.

• The backlight of this watch employs an electro-luminescent (EL) light, which loses its illuminating power after very long term use.

• Frequent use of the backlight shortens the battery life.

• The watch emits an audible sound whenever the display is illuminated. This is because the EL light vibrates slightly when lit. It does not indicate malfunction of the watch.

Stopwatch Mode Countdown Alarm Mode Alarm Mode

Timekeeping Mode

TIMEKEEPING MODE

To set the time and date

1. Hold down AAwhile in the Timekeeping Mode until the seconds digits flash on the display.

2. Press CCto change the selection (flashing) in the following sequence.

Month

Day

Minutes

PM indicator

Day of week

3.While the seconds setting is selected (flashing), press EEto reset it to 00. If you press EEwhile the seconds setting is in the range of 30 to 59, the seconds are reset to 00 and 1 is added to the minutes. If the seconds setting is in the range of 00 to 29, the minutes count is unchanged.

4.While any other setting (beside seconds) is selected (flashing), press EEto increase it or BBto decrease it. While the 12/24-hour format setting is selected, press EEto toggle it between 12 and 24.

• Except for the seconds or 12/24-hour setting, holding down a button changes the

setting at high speed.

• When the 12-hour format is selected, the indicator P appears on the display to

indicate “P.M.” times. There is no indicator for “A.M.” times.

5.After you set the time and date, press AAto return to the Timekeeping Mode.

• The day of the week is automatically set in accordance with the date.

• The date can be set within the range of January 1, 1995 to December 31, 2039.

• If you do not operate any button for a few minutes while a setting is flashing, the

flashing stops and the watch goes back to the Timekeeping Mode automatically.

Hour

Seconds

Seconds Hour

Month YearDay

Minutes

12/24-Hour

Format

STOPWATCH MODE

The stopwatch Mode lets you measure elapsed time, split times, and two finishes. The range of the stopwatch is 23 hours, 59 minutes, 59.99 seconds. You can use the EL backlight at any time while the stopwatch is operating.

ABOUT THE EL ALARM

While the EL alarm feature is turned on, the watch's EL backlight flashes along with the audible tone when a daily alarm time is reached, when the hourly time signal sounds, or when the end of a countdown alarm operation is reached. Pressing

while the EL alarm feature is turned on causes the display to remain illuminated for five seconds, instead of the normal two seconds when the EL alarm is turned off.

To turn the EL Alarm feature on and off

• In the Timekeeping Mode, hold down BBuntil the EL Alarm indicator appears on (EL

alarm on) or disappears from (EL alarm off) the display.

ON OFF

EL Alarm indicator

Hold down

Mode indicator

SecondsHours

Minutes

1/100 seconds

COUNTDOWN ALARM MODE

The countdown alarm can be set within a range of 1 second to 24 hours. When the countdown reaches zero, an alarm sounds for 10 seconds or until you press any button.

To set the countdown start time

1.Hold down AAwhile in the Countdown Alarm Mode. The hour setting flashes on the display because it is selected.

2.Press CCto change the selection in the following sequence.

Mode indicator

SecondsHours

Minutes

1/10 seconds

Hour Minutes Seconds

3.Press EEto increase the selected setting or BBto decrease it. Holding down either button changes the setting at high speed.

• To set the starting value of the countdown time to 24 hours, set 0:00'00".

4.After you set the countdown start time, press AAto return to the Countdown Alarm Mode.

• If you do not operate any button for a few minutes while a setting is flashing, the

flashing stops and the watch goes back to the Countdown Alarm Mode automatically.

To use the countdown alarm

1.Press DDwhile in the Countdown Alarm Mode to start the countdown alarm.

2.Press DDagain to stop the countdown alarm.

• You can resume a paused countdown alarm operation by pressing DD.

3.Stop the countdown alarm and then press BBto reset the countdown time to its starting value.

• When the end of the countdown is reached and auto repeat timing is off, the alarm

sounds for 10 seconds or until you stop the alarm by pressing any button. Countdown timing stops and the countdown time is automatically reset to its starting value after the alarm stops.

To turn auto repeat timing on and off

1.Hold down AAwhile in the Countdown Alarm Mode until the hour setting flashes.

2.Press DDto turn auto repeat on and off.

OFF ON

Auto repeat indicator

Press

3.Press AAto return to the Countdown Alarm Mode.

• When the end of the countdown is reached while auto repeat is on, the alarm

sounds, but the countdown restarts from the beginning without stopping. You can stop the countdown by pressing DDand manually reset to the start time by pressing

• When the starting value of the countdown time is set at 10 seconds or less and auto

repeat is turned on, the countdown alarm tone sounds for only one second instead of the normal 10 seconds. If the EL Alarm is turned on, the EL backlight does not flash under the above conditions.

Elapsed time measurement

DD DD DD DD BB

Start Stop Re-start Stop Clear

Split time measurement

DD BB BB DD BB

Start Split Split release Stop Clear

Split time and 1st-2nd place times

DD BB DD BB BB

Start Split Stop Split release Clear

First runner finishes.

Second runner finishes. Record time of first runner.

Record time of second runner.

1977-2

To turn the daily alarm and hourly time signal on and off

Press BBwhile in the Alarm Mode to change the status of the daily alarm and hourly time signal in the following sequence.

• The alarm on indicator (ALM) and the Hourly Signal on indicator (SIG) are shown on the display in all modes while these functions are turned on.

To test the alarm sound

Hold down EEwhile in the Alarm Mode to sound the alarm.

To set the alarm time

1.Hold down AAuntil the hour setting starts to flash on the display. The hour setting

flashes because it is selected.

• This operation automatically turns on the Daily Alarm.

2.Press CCto change the selection in the following sequence.

3.While the hour or minutes setting is selected (flashing) press EEto increase it or

to decrease it. Holding down either button changes the current setting 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 (no indicator) or afternoon (P).

4.After you set the alarm time, press AAto return to the Alarm Mode.

• If you do not operate any button for a few minutes while a setting is flashing, the flashing stops and the watch goes back to the Alarm Mode automatically.

Hour Minutes

ALM SIG

Hourly Time Signal Only

Both ON Both OFF Daily Alarm

Only

ALM SIG

ALARM MODE

When the Daily Alarm is turned on, the alarm sounds for 20 seconds at the preset time each day. Press any button to stop the alarm after it starts to sound. When the Hourly Time Signal is on, the watch beeps every hour on the hour.

Mode indicator

Alarm on indicator

Hours Minutes

Hourly time signal on indicator