Casio 2161 Users Manual QW 2161/2251/2261

2251 to the manual 39e5bc23-ec7f-4a1c-964e-25cbdd2e3af9

2015-01-21

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2161/2251/2261-1

3. While the seconds digits are selected (flashing), press BB

B to reset the seconds to

“00”. If you press BB

B while the seconds count is in the range of 30 to 59, the sec-

onds are reset to “00” and 1 is added to the minutes. If the seconds count is in the

range of 00 to 29, the minutes count is unchanged.

4. While any other digits (besides seconds) are selected (flashing), press BB

B to in-

crease the number. Holding down BB

B changes the number at high speed.

•To switch between the 12-hour and 24-hour formats, press DD

D while some dig-

its are flashing.

5. After you set the time and date, press AA

A to 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 selection is flashing, the

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

About the backlight

When you switch the backlight function on, the backlight of the watch flashes when-

ever alarm, countdown alarm or hourly time signal is sounding.

•Pressing DD

D at any time illuminates the display for about two seconds, regardless of

the backlight’s on/off setting.

•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.

To switch the backlight function on and off

In the Timekeeping Mode, hold down BB

B for one or two seconds to switch the back-

light function on and off. When you switch the backlight function on, an indicator

appears on the display as shown.

•The backlight function indicator remains on the display in all modes until you switch

the backlight function off.

•The above operation controls operation of the backlight function only. It does not

affect operation of audible tones and signals.

•The watch will emit an audible sound whenever the display is illuminated. This is

caused by a transistor that vibrates when the EL panel lights up. It does not indicate

malfunction of the watch.

GENERAL GUIDE

•Press CC

C to change from mode to mode. Each mode is explained in detail on the following pages.

•After you perform an operation in any mode, pressing CC

C returns to the Timekeeping Mode.

•Press DD

D in any mode to illuminate the display.

Timekeeping Mode Alarm Mode Stopwatch ModeCountdown Alarm Mode

[Modules 2251, 2261] [Module 2161]

Module No. 2161/2251/2261

TIMEKEEPING MODE

To set the time and date

1. Press AA

A while in the Timekeeping Mode. The seconds

digits flash on the display because they are

selected

2. Press CC

C to change the selection in the following se-

quence.

Seconds

Day

Hour Minutes

YearMonth

ALARM MODE

You can set an alarm with hour, minutes, month, and day.

When the alarm is on, the alarm sounds for 20 seconds at

the preset time. When the Hourly Time Signal is on, the

watch beeps every hour on the hour.

Alarm Types

The types of alarm you get depends on the information

you set.

•To set a daily alarm

Set the hour and minutes for the alarm time. Set “–” for

the month and “– –” for the day (see step 3 under “To

set the alarm time”). This type of setting causes the alarm

to sound every day at the time you set.

•To set a date alarm

Set the month, day, hour and minutes for the alarm time.

This type of setting causes the alarm to sound at the

specific time, on the specific date you set.

•To set a 1-month alarm

Set the month, hour and minutes for the alarm time. Set “– –” for the day (see step

3 under “To set the alarm time”). This type of setting causes the alarm to sound

every day at the time you set, only during the month you set.

•To set a monthly alarm

Set the day, hour and minutes for the alarm time. Set “–” for the month (see step 3

under “To set the alarm time”). This type of setting causes the alarm to sound

every month at the time you set, on the day you set.

To set the alarm time

1. Press AA

A while in the Alarm Mode until the hour digits start to flash on the display.

The hour digits flash because they are

selected

•At this time the alarm is automatically switched on.

2. Press CC

C to change the selection in the following sequence.

Hour

Day

Minutes

Month

3. Press BB

B to increase the selected digits. Holding down BB

B 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.

4. After you set the alarm time, press AA

A to return to the Alarm Mode.

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

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

To stop the alarm

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

To switch an alarm and Hourly Time Signal on and off

Press BB

B while in the Alarm Mode to change the status of an alarm (see “Alarm Types”)

and Hourly Time Signal in the following sequence.

Both off Both onAlarm only Hourly Time Signal only

Month - Day

Minutes

Hour

Alarm on indicator

Mode

indicator

Hourly time

signal on

indicator

Hourly time signal

on indicator

Alarm on indicator

Backlight function

on indicator

PM indicator

Day of week

Month - Day

SecondsHour

Minutes

The operational procedures for Modules 2251, 2261 and 2161 are identical. All of the illustrations in this manual show Module 2161.

2161/2251/2261-2

3. Press BB

B to increase the selected number. Holding down BB

B changes the number

at high speed.

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

4. After you set the countdown time, press AA

A to return to the Countdown Alarm Mode.

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

flashing stops and the watch goes back to the Countdown Alarm Mode automatical-

ly.

To use the countdown timer

1. Press BB

B while in the Countdown Alarm Mode to start the countdown timer.

2. Press BB

B again to stop the countdown timer.

•You can continue countdown timer operation by pressing BB

3. Stop the timer and then press AA

A until the countdown time is reset 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. Count-

down timing stops, and the countdown time is automatically reset to its starting

value after the alarm stops.

To switch auto repeat timing on and off

1. Press AA

A while in the Countdown Alarm Mode. The hours

digit flashes on the display because it is

selected

2. Press DD

D to switch auto repeat on and off.

3. Press AA

A to return to the Countdown Alarm Mode.

•When the end of the countdown is reached while auto

repeat is on, the alarm sounds, but the starting count-

down time is reset and countdown timing starts again

automatically whenever the countdown reaches zero.

You can stop timing by pressing BB

B, and manually reset

to the starting countdown time by pressing AA

Current time

Mode indicator

1/100 second

Minutes

Seconds

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.

To measure elapsed time

1. Press BB

B to start the stopwatch.

2. Press BB

B to stop the stopwatch.

•You can resume the measurement operation by press-

ing BB

B again.

3. Press AA

A to clear the stopwatch to all zeros.

•For the first 60 minutes, the display shows minutes, sec-

onds, and 1/100 second. After 60 minutes, the display

format changes to show hours, minutes, and seconds.

To record split times

1. Press BB

B to start the stopwatch.

2. Press AA

A to display the timing up to that point. Stopwatch timing continues internal-

ly.

3. Press AA

A to clear the split time and to continue time measurement on the display.

•You can repeat steps 2 and 3 as many times as you want.

4. Press BB

B to stop the time measurement.

5. Press AA

A to clear the stopwatch to all zeros.

To time first and second place finishes

1. Press BB

B to start the stopwatch.

2. Press AA

A when the first finisher crosses the line, and record the time.

3. Press BB

B when the second finisher crosses the line.

4. Press AA

A to display the finishing time of the second finisher.

5. Press AA

A again to clear the stopwatch to all zeros.

COUNTDOWN ALARM MODE

The countdown timer can be set within a range of 1 sec-

ond to 24 hours. When the countdown reaches zero, an

alarm sounds for 10 seconds or until you press any but-

ton.

To set the countdown time

1. Press AA

A while in the Countdown Alarm Mode. The hours

digit flashes on the display because it is

selected

2. Press CC

C to change the selection in the following se-

quence.

Seconds

Minutes

Hours

Current time

Minutes

Hours

Mode indicator

Seconds

Auto repeat on indicator

Casio 2161 Users Manual QW 2161/2251/2261

2251 to the manual 39e5bc23-ec7f-4a1c-964e-25cbdd2e3af9

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