Casio 3503 User manual

© 2021 CASIO COMPUTER CO., LTD.
MA2107-A
User’s Guide
Watch
3503 EN

Congratulations upon your selection of this CASIO watch.
To ensure that this watch provides you with the years of service for which it is
designed, carefully read and follow the instructions in this manual, especially the
information under “Operating Precautions” and “User Maintenance”.

EN-1
About This Manual
•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.
•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.
•Note that the product illustrations in this manual are
intended for reference only, and so the actual product
may appear somewhat different than depicted by an
illustration.

EN-2
Contents
About This Manual.............................................................................................. EN-1
Watch Features................................................................................................... EN-4
Configuring Time and Date Settings................................................................. EN-5
To configure time and date settings ................................................................EN-5
Selecting a Mode................................................................................................ EN-7
Alarm.................................................................................................................... EN-9
To set the alarm time .......................................................................................EN-9
To stop the alarm ...........................................................................................EN-10
To enable and disable the Daily Alarm and Hourly Time Signal.....................EN-10
To test the alarm ............................................................................................EN-11
Stopwatch ......................................................................................................... EN-12
To measure elapsed time...............................................................................EN-12

EN-3
Main Indicators ................................................................................................. EN-13
Specifications ................................................................................................... EN-14
Operating Precautions ..................................................................................... EN-16
User Maintenance ............................................................................................ EN-26

EN-4
Watch Features
◆Alarm
◆Stopwatch

EN-5
Configuring Time and Date Settings
To configure time and date settings
1. In the Timekeeping Mode, press Cthree times. This
causes the seconds to flash on the display.
2. Press Ato move the flashing in the sequence shown
below to select a setting.
Second Hour
Day
Minute
Month
A A
A
A
A
A
2
3
Day of the week
5
1
4

EN-6
3. Use Dto change the selected setting.
Screen This setting item:
Reset the second to 00
•30 to 59 seconds: Adds 1 to minutes
Change the hour or minute
•Holding down Dchanges the current selection at high speed.
Change the month, day, or day of the week
•Holding down Dchanges the current selection at high speed.
4. Press Cto exit the setting screen.
•The watch returns to the Timekeeping Mode automatically if you do not perform
any button operation for one or two minutes in the Time Setting Mode.

EN-7
Selecting a Mode
•Press Cto change the mode.
•After you perform an operation in any mode, pressing Creturns to the
Timekeeping Mode.
C
PM indicator
Hour : Minutes Seconds
* SU: Sunday MO: Monday TU: Tuesday
WE: Wednesday TH: Thursday FR: Friday
SA: Saturday
D
Day of week*
Month Day
Timekeeping Mode

EN-8
C
Stopwatch Mode
Time Setting Alarm Mode
C C
•Press Bin any mode to illuminate the face of the watch.

EN-9
Alarm
When the Daily Alarm is turned on, the alarm sounds for 20 seconds at the preset
time each day. When the Hourly Time Signal is turned on, the watch beeps every
hour on the hour.
•The watch returns to the Timekeeping Mode automatically if you do not perform
any button operation for one or two minutes in the Alarm Mode.
To set the alarm time
1. In the Alarm Mode, press A.
Hour setting
A A
Minute setting
Normal Alarm Mode
(No flashing)

EN-10
2. Press Dto increase the flashing digits.
•Holding down Dchanges the setting at high speed.
•Press Cto return to the Timekeeping Mode.
To stop the alarm
Press any button to stop the alarm after it starts to sound.
To enable and disable the Daily Alarm and Hourly Time Signal
Press Dwhile in the Alarm Mode to change the settings of the Daily Alarm and
Hourly Time Signal in the following sequence.
Both enabled Both disabled Daily Alarm only Hourly Time
Signal only
D D D D

EN-11
To test the alarm
Hold down Dwhile in the Alarm Mode to sound the alarm.

EN-12
Stopwatch
The Stopwatch Mode lets you measure elapsed time. The
range of the stopwatch is 59 minutes, 59.9 seconds.
To measure elapsed time
DD D D A
Start Stop Resume Stop Reset
Minutes: Seconds
1/10 second

EN-13
Main Indicators
Number Name See
1PM indicator EN-7
2Stopwatch Mode EN-12
3Alarm on indicator EN-10
4Hourly time signal on indicator EN-10
1 3 42

EN-14
Specifications
Accuracy:
±30 seconds per month average.
Basic Functions:
Hour, minute, second, month, day, day of the week, a.m./p.m.(P)
Auto-calendar set at 28 days for February
Alarm:
Setting units: Hour, minute
Beeper: 20 seconds
Hourly time signal: Watch beeps every hour on the hour.
Stopwatch:
Measuring units: 1/10 second
Measuring capacity: 59 minutes, 59.9 seconds (60 minutes)
Other:
LED light

EN-15
Battery:
CR1616 x 1 (battery sold separately)
Battery life: Approximately 3 years
Conditions:
– Alarm: Once (20 seconds)/day
– Illumination: Once (1.5 seconds)/day
Specifications are subject to change without notice.

EN-16
Operating Precautions
Water Resistance
•The information below applies to watches with WATER RESIST or WATER
RESISTANT marked on the back cover.
Water
Resistance
Under Daily
Use
Enhanced Water Resistance Under
Daily Use
5
Atmospheres
10
Atmospheres
20
Atmospheres
Marking On watch front or on
back cover
No
BAR mark 5BAR 10BAR 20BAR
Example of
Daily Use
Hand washing, rain Yes Yes Yes Yes
Water-related work, swimming No Yes Yes Yes
Windsurfing No No Yes Yes
Skin diving No No Yes Yes
• Do not use your watch for scuba diving or other types of diving that requires air tanks.
OPUM-E

EN-17
•Watches that do not have WATER RESIST or WATER RESISTANT marked on
the back cover are not protected against the effects of sweat. Avoid using such
a watch under conditions where it will be exposed to large amounts of sweat or
moisture, or to direct splashing with water.
•Even if a watch is water resistant, note the usage precautions described below.
Such types of use reduce water resistance performance and can cause fogging of
the glass.
− Do not operate the crown or buttons while your watch is submersed in water or
wet.
− Avoid wearing your watch while in the bath.
− Do not wear your watch while in a heated swimming pool, sauna, or any other
high temperature/high humidity environment.
− Do not wear your watch while washing your hands or face, while doing
housework, or while performing any other task that involves soaps or detergents.
•After submersion in seawater, use plain water to rinse all salt and dirt from your
watch.
•To maintain water resistance, have the gaskets of your watch replaced periodically
(about once every two or three years).

EN-18
•A trained technician will inspect your watch for proper water resistance whenever
you have its battery replaced. Battery replacement requires the use of special tools.
Always request battery replacement from your original retailer or from an authorized
CASIO service center.
•Some water-resistant watches come with fashionable leather bands. Avoid
swimming, washing, or any other activity that causes direct exposure of a leather
band to water.
•The inside surface of the watch glass may fog when the watch is exposed to a
sudden drop in temperature. No problem is indicated if the fogging clears up
relatively quickly. Sudden and extreme temperature changes (such as coming into
an air conditioned room in the summer and standing close to an air conditioner
outlet, or leaving a heated room in the winter and allowing your watch to come into
contact with snow) can cause it to take longer for glass fogging to clear up. If glass
fogging does not clear up or if you notice moisture inside of the glass, immediately
stop using your watch and take it to your original retailer or to an authorized CASIO
service center.
•Your water-resistant watch has been tested in accordance with International
Organization for Standardization regulations.