Casio 3231 User manual

Operation Guide 3231
MA1011-EA
E-1
About This Manual
•Button operations are indicated using the letters
shown in the illustration.
E-2
Contents
General Guide ......................................................................................................... E-4
Timekeeping ............................................................................................................ E-6
Alarm ...................................................................................................................... E-10
Countdown Timer ................................................................................................. E-14
Stopwatch .............................................................................................................. E-17
Specifications ....................................................................................................... E-19
E-3
Procedure Lookup
The following is a handy reference list of all the operational procedures contained in
this manual.
To set the time and date ......................................................................................... E-6
To switch the backlight function on and off ......................................................... E-9
To set the alarm time ............................................................................................ E-11
To stop the alarm .................................................................................................. E-13
To switch an alarm and Hourly Time Signal on and off .................................... E-13
To set the countdown time .................................................................................. E-14
To use the countdown timer ................................................................................ E-15
To switch auto repeat timing on and off ............................................................. E-16
To measure elapsed time ..................................................................................... E-17
To record split times ............................................................................................. E-18
To time first and second place finishes .............................................................. E-18
E-4
General Guide
•Press Cto change from mode to mode.
Timekeeping Mode Alarm Mode
Press C.
E-5
•After you perform an operation in any mode, pressing Creturns to the Timekeeping
Mode.
•Press Din any mode to illuminate the display. Illumination turns off about two
seconds after you release D.
Countdown Timer Mode Stopwatch Mode
E-6
Timekeeping
To set the time and date
1. Press Awhile in the Timekeeping Mode. The
seconds digits flash on the display because they
are
selected .
2. Press Cto change the selection in the following
sequence.
Seconds
Day
Hour Minutes
Year
Month
Day of week
Month
Day
Hour
PM indicator
Minutes
Seconds
E-7
3. While the seconds digits are selected (flashing), press Bto reset the seconds to
“00”. If you press Bwhile the seconds count is in the range of 30 to 59, the seconds
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 Bto increase
the number. Holding down Bchanges the number at high speed.
•To switch between the 12-hour and 24-hour formats, press DD
DD
Dwhile some
digits are flashing.
5. After you set the time and date, press Ato 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, 2000 to December 31, 2099.
•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.
E-8
About the backlight
When you switch the backlight function on, the backlight of the watch flashes
whenever alarm (page E-10), countdown timer or hourly time signal is sounding.
•Pressing Dat any time illuminates the display, 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.
•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.
•The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
•The backlight automatically stops illuminating whenever an alarm sounds.
E-9
To switch the backlight function on and off
In the Timekeeping Mode, hold down Bfor about two seconds to switch the backlight
function on and off. When you switch the backlight function on, an indicator appears
on the display as shown.
Backlight function
on indicator
•The backlight function on 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.

Operation Guide 3231
E-10
Alarm
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.
Mode indicator
Alarm on indicator
DayMonth
Minutes
Hour
Hourly time signal
on indicator
E-11
•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 Awhile 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 Cto change the selection in the following sequence.
Hour
Day
Minutes
Month
E-12
3. Press Bto increase the selected digits. Holding down Bchanges 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 Ato 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.
E-13
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 Bwhile in the Alarm Mode to change the status of an alarm (see “Alarm
Types” on page E-10) and Hourly Time Signal in the following sequence.
Both off
Both on
Alarm only
Hourly Time Signal only
Hourly time signal on indicator
Alarm on indicator
E-14
Countdown Timer
The countdown timer 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 time
1. Press Awhile in the Countdown Timer Mode. The
hours digit flashes on the display because it is
selected .
2. Press Cto change the selection in the following
sequence.
Seconds
Minutes
Hours
Mode indicator
Minutes
SecondsHours
Current time
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3. Press Bto increase the selected number. Holding down Bchanges the number
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 time, press Ato return to the Countdown Timer 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 Timer Mode automatically.
To use the countdown timer
1. Press Bwhile in the Countdown Timer Mode to start the countdown timer.
2. Press Bagain to stop the countdown timer.
•You can continue countdown timer operation by pressing B.
3. Stop the timer and then press Auntil 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. Countdown
timing stops, and the countdown time is automatically reset to its starting value
after the alarm stops.
E-16
1. Press Awhile in the Countdown Timer Mode. The
hours digit flashes on the display because it is
selected .
2. Press Dto switch auto repeat on and off.
3. Press Ato return to the Countdown Timer Mode.
•When the end of the countdown is reached while
auto repeat is on, the alarm sounds, but the
starting countdown time is reset and countdown
timing starts again automatically whenever the
countdown reaches zero. You can stop timing by
pressing B, and manually reset to the starting
countdown time by pressing A.
To switch auto repeat timing on and off
Auto repeat on indicator
E-17
The Stopwatch Mode lets you measure elapsed time,
split times, and two finishes. The range of the
stopwatch is 23 hours, 59 minutes, 59 seconds.
To measure elapsed time
1. Press Bto start the stopwatch.
2. Press Bto stop the stopwatch.
•You can resume the measurement operation by
pressing Bagain.
3. Press Ato clear the stopwatch to all zeros.
•For the first 60 minutes, the display shows minutes,
seconds, and 1/100 second. After 60 minutes, the
display format changes to show hours, minutes, and
seconds.
Stopwatch
Current time
Mode indicator
Minutes
Seconds
1/100 second
E-18
To record split times
1. Press Bto start the stopwatch.
2. Press Ato display the timing up to that point. Stopwatch timing continues internally.
3. Press Ato 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 Bto stop the time measurement.
5. Press Ato clear the stopwatch to all zeros.
To time first and second place finishes
1. Press Bto start the stopwatch.
2. Press Awhen the first finisher crosses the line, and record the time.
3. Press Bwhen the second finisher crosses the line.
4. Press Ato display the finishing time of the second finisher.
5. Press Aagain to clear the stopwatch to all zeros.
E-19
Specifications
Accuracy at normal temperature: ±15 seconds a month
Timekeeping: Hour, minutes, seconds, pm (P), month, day, the day of the week
Time system: Switchable between 12-hour and 24-hour formats
Calendar system: Auto-calendar pre-programmed from the year 2000 to 2099
Alarm: Multi-function alarm, hourly time signal
Countdown Timer
Measuring unit: 1 second
Input range: from 1 second to 24 hours
Other: Auto-repeat function
Stopwatch
Measuring units: 1/100 second (for the first 60 minutes)
1 second (after 60 minutes)
Measuring capacity: 23 hours, 59 minutes, 59 seconds
Measuring modes: Elapsed time, split time and two finishes

Operation Guide 3231
E-20
Illumination: EL (electro-luminescent) backlight
Battery: One lithium battery (Type: CR2016)
Approximately 2 years on type CR2016 (Assuming 2 seconds light operation
and 20 seconds alarm operation per day)
Note: Frequent use of the backlight shortens the battery life noted above.