Casio 3751 Operation Manual

MA0412-EA
About This Manual
General Guide
• Press C to change from mode to mode.
• In any mode, press B to illuminate the display.
Timekeeping Mode

Timekeeping

This watch features separate digital and analog timekeeping. The procedures for
setting the digital time and analog time are different.
• In the Timekeeping Mode, you can press D to change the display format as shown
below.
Day of the Week
Seconds
Digital Time and Date
Use the Timekeeping Mode to set and view a digital display of the current time and date.
When setting the digital time, you can also configure settings for summer time
(Daylight Saving time or DST), your Home City code (the code for the city where you
normally use the watch), and the 12/24-hour format.
• This watch is preset with a number of city codes, each of which represents the time
zone where that city is located. When setting the digital time, it is important that you
select the correct city code for your Home City. If your location is not included in the
preset city codes, select the preset city code that is in the same time zone as your
location.
• Note that all of the times for the World Time Mode city codes are displayed in
accordance with the digital time and date settings you configure in the Timekeeping
Mode.
• After you correctly set your Home City time and date, you can set the watch up for
timekeeping with a different city code simply by changing the Home City code in the
Timekeeping Mode.
To set the digital time and date
3. Press C to move the flashing in the sequence shown below to select the other
settings.
Seconds DST
Day Month
Operation Guide 3751
• Depending on the model of your watch, display text
appears either as dark figures on a light background or
light figures on a dark background. All sample displays
in this manual are shown using dark figures on a light
background.
• For the sake of simplicity, the sample displays in this
manual do not show the analog hands of the watch.
• Button operations are indicated using the letters shown
in the illustration.
• Each section of this manual provides you with the
information you need to perform operations in each
mode. Further details and technical information can be
found in the "Reference" section.
World Time Mode Countdown Timer Mode
Press .
Month – Day Hour : Minutes
1. In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.
2. Press C twice to move the flashing to the Home City
code setting (see the illustration below), and then use
B and D to select the code you want.
• Make sure you select your Home City code before
changing any other setting.
• For full information on city codes, see the "City Code
Table".
Home City Code Hour
Year 12/24-Hour format
Stopwatch Mode
4. When the setting you want to change is flashing, use B and D to change it as
described below.
Screen To do this:
Reset the seconds to
Toggle between Daylight Saving Time (
Standard Time (
Change the Home City code
Change the hour or minutes
Toggle between 12-hour (
(
Change the year
Change the month or day
5. Press A to exit the setting screen.
PM indicator
• See "Digital Time Daylight Saving Time (DST) Setting" below for details about the
DST setting.
Digital Time Daylight Saving Time (DST) Setting
Daylight Saving Time (summer time) advances the digital time setting by one hour
from Standard Time. Remember that not all countries or even local areas use Daylight
Saving Time.
To toggle the Timekeeping Mode digital time between DST and Standard Time
DST indicator
Setting the Analog Time
Perform the procedure below when the time indicated by the analog hands does not
match the time of the digital display.
To adjust the analog time
• If you need to advance the analog time setting a long way, hold down D until the
time starts advancing at high speed, and then press B. This locks the high-
Minutes speed hand movement, so you can release the two buttons. High-speed hand
movement continues until you press any button. It will also stop automatically
after the time advances 12 hours or if an alarm (daily alarm or countdown beeper)
starts to sound.
4. Press A to exit the setting screen.
• The watch will automatically adjust the minute hand slightly to match its internal
second count when you exit the setting screen.
• To return to the Timekeeping Mode, press C.
Alarm Mode
00
ON ) and
OF )
12H ) and 24-hour
24H

) timekeeping

1. In the Timekeeping Mode, hold down A until the seconds
start to flash, which indicates the setting screen.
2. Press C once to display the DST setting screen.
3. Press D to toggle between Daylight Saving Time (
displayed) and Standard Time (
4. Press A to exit the setting screen.
• The DST indicator appears to indicate that Daylight
Saving Time is turned on.
1. In the Timekeeping Mode, press C five times to enter
the Hand Setting Mode.
2. Hold down A until the current digital time starts to
flash, which indicates the analog setting screen.
3. Press D to advance the analog time setting by
20 seconds.
• Holding down D advances the analog time setting at
high speed.
Hand Setting Mode
Do this:
Press D.
Press D.
Use D (east) and B (west).
Use D (+) and B (–).
Press D.
Use D (+) and B (–).
ON
OF displayed).
1