Casio 2251 Watch User Manual


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2161/2251/2261-1
3.While the seconds digits are selected (flashing), press
BB
BB
B to reset the seconds to
“00”. If you press
BB
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
BB
B to in-
crease the number. Holding down
BB
BB
B changes the number at high speed.
• To switch between the 12-hour and 24-hour formats, press
DD
DD
D while some dig-
its are flashing.
5.After you set the time and date, press
AA
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
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
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
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
CC
C returns to the Timekeeping Mode.
• Press
DD
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
AA
A while in the Timekeeping Mode. The seconds
digits flash on the display because they are
selected
.
2.Press
CC
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
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
CC
C to change the selection in the following sequence.
Hour
Day
Minutes
Month
3.Press
BB
BB
B to increase the selected digits. Holding down
BB
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
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
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.