Casio 2161 User Manual

Module No. 2161/2251/2261
Press C C C C 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 C C C C C returns to the Timekeeping Mode.
Press D D D D D in any mode to illuminate the display.
The operational procedures for Modules 2251, 2261 and 2161 are identical. All of the illustrations in this manual show Module 2161.
[Modules 2251, 2261]
TIMEKEEPING MODE
To set the time and date
Month - Day
1. Press A A A A A while in the Timekeeping Mode. The seconds
Day of week
2. Press C C C C C to change the selection in the following se-
Hour Seconds
Minutes
PM indicator
3. While the seconds digits are selected (flashing), press B B B B B to reset the seconds to
"00". If you press B B B B 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 B B B B B to in-
crease the number. Holding down B B B B B changes the number at high speed.
To switch between the 12-hour and 24-hour formats, press D D D D D while some dig-
its are flashing.
5. After you set the time and date, press A A A A 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 D D D D 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 B B B B 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.
Alarm on indicator
Hourly time signal
on indicator
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.
Timekeeping Mode
[Module 2161]
digits flash on the display because they are selected .
quence.
Seconds Hour
Day Month
Backlight function
on indicator
GENERAL GUIDE
Alarm Mode
Alarm on indicator
Hourly time
signal on
indicator
Minutes
Year
Hour
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 A A A A 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 C C C C C to change the selection in the following sequence.
3. Press B B B B B to increase the selected digits. Holding down B B B B 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 A A A A 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 B B B B 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
Countdown Alarm Mode
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
Mode
indicator 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.
Minutes
To set a date alarm
Month - Day
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.
Hour Minutes
Day
Alarm only Hourly Time Signal only
2161/2251/2261-1
Stopwatch Mode
Month
Both on