To Turn On Illumination; To Change The Illumination Duration; Reference; To Turn The Button Operation Tone On And Off - Casio 3451 Operation Manual

Operation Guide 3451

To turn on illumination

In any mode (except when a setting screen is on the display), press B to illuminate
the display for about one second.

To change the illumination duration

1. In the Timekeeping Mode, hold down A for about two
seconds until the time zone of the currently selected
Home City starts to flash on the world map. This is the
setting screen.
Release A immediately after the Home City code
•
appears. Keeping it depressed longer (about four
seconds) will switch to the Local Time City setting
screen.
2. Press C 10 times to display the illumination duration setting screen.
• See the sequence in step 3 of the procedure under "To set your Home City time
and date" (page E-12) for information about how to scroll through setting screens.
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Reference

This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto Return Feature
• The watch will return to the Timekeeping Mode automatically if you do not perform
any operation for about two or three minutes while in the Digital Compass/
Thermometer Mode or Alarm Mode.
• If you leave a screen with flashing digits on the display without performing any
operation for two or three minutes, the watch saves any settings you have made up
to that point and exits the setting screen automatically.
Button Operation Tone
The button operation tone sounds any time you press one of the watch's buttons. You
can turn the button operation tone on or off as desired.
• Even if you turn off the button operation tone, the alarm, hourly time signal, and
Countdown Timer Mode alarm all operate normally.
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4. Press A to exit the setting screen.
• The indicator is displayed in all modes when the button operation tone is
turned off.
Data and Setting Scrolling
The B and D buttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Sensor Error and Low Battery Displays
Subjecting the watch to strong impact can damage the sensor or cause internal
connection problems. These conditions will cause ERR (error) to appear on the
display, indicating that sensor operation is disabled. Sensor operation also is disabled
whenever BATT (battery) is on the display, which indicates insufficient battery power
or voltage due to a low battery or a cold environment.
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Timekeeping
• Resetting the seconds to 00 while the current count is in the range of 30 to 59
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to 00 without changing the minutes.
• With the 12-hour format, the P (PM) indicator appears on the display for times in the
range of noon to 11:59 p.m. and no indicator appears for times in the range of
midnight to 11:59 a.m.
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
• The year can be set in the range of 2000 to 2099.
• The watch's built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to
change it except after you have the watch's battery replaced.
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World Time: 48 cities (31 time zones); UTC; World Time City/Local Time City
swapping
Other: Standard time/Daylight Saving Time
Stopwatch:
Measuring unit: 1/100 second
Measuring capacity: 59' 59.99"
Measuring modes: Elapsed time, split time, two finishes
Countdown Timer:
Measuring unit: 1 second
Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
Other: Auto-repeat timing
Alarms: 5 daily alarms (with 1 snooze alarm); Hourly time signal
Illumination: EL (electro-luminescent panel); Selectable illumination duration
(approximately 1.5 seconds or 3 seconds)
Other: Button operation tone on/off
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3. Press D to toggle the illumination duration between three seconds (3 displayed)
and 1.5 seconds (1 displayed).
4. Press A to exit the setting screen.

To turn the button operation tone on and off

1. In the Timekeeping Mode, hold down A for about two
seconds until the time zone of the currently selected
Home City starts to flash on the world map. This is the
setting screen.
Release A immediately after the Home City code
•
appears. Keeping it depressed longer (about four
seconds) will switch to the Local Time City setting
screen.
Mute indicator
2. Press C nine times to display the button operation
tone setting.
• See the sequence in step 3 of the procedure under
"To set your Home City time and date" (page E-12) for
information about how to scroll through setting
screens.
3. Press D to toggle the button operation tone on (
displayed) and off (
• If an error occurs or the battery goes low during sensor operation, ERR or BATT
will appear in the lower left of the display for about 10 seconds, and then change to
- - -.
• If an error occurs or the battery goes low during bearing sensor correction, ERR or
BATT will appear in the lower left of the display for about one second, and then the
calibration screen will appear. Try performing calibration again.
• If an error occurs or the battery goes low during temperature sensor calibration,
ERR or BATT will appear on the display for about one second. Next, - - - will flash
for the temperature value in the lower part of the display. This indicates that
temperature sensor calibration is not possible. Press A to exit the calibration
screen, and then try performing temperature sensor calibration again.
• If the ERR message appears frequently, it could mean the sensor is malfunctioning.
Whenever you have a sensor malfunction, be sure to take the watch to your original
dealer or nearest authorized CASIO distributor as soon as possible.

Specifications

Accuracy at normal temperature: ± 20 seconds a month
Timekeeping: Hour, minutes, seconds, p.m. (P), month, day, day of the week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 48 city codes); Daylight Saving
Time (summer time)/Standard Time; Simultaneous Home Time/Local Time;
Home City/Local Time City swapping
Digital Compass:
16 directions; Angle values from 0° to 359°; North pointer
Reading Timing: Continuous operation every second for 10 seconds
Other: Bearing sensor correction; Magnetic declination correction
Thermometer:
Measurement and Display Range: –10.0°C to 60.0°C (or 14.0°F to 140.0°F)
Display Unit: 0.1°C (or 0.2°F)
Reading Timing: Continuous operation every two seconds for 10 seconds
Other: Temperature sensor calibration
Battery: One lithium battery (Type: CR2025)
Approximately 5 years on type CR2025 (Alarm operation 10 seconds/day;
Illumination operation 1.5 seconds/day; Direction reading operation 20 seconds/
day; temperature reading operation 20 seconds/day)
Frequent use of the light shortens the battery life.
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not
displayed).
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