Casio 3451 Operation Manual Download Page 1

Operation Guide 3451

E-9

 Stopwatch Mode

 World Time Mode

 Countdown Timer Mode

 Alarm Mode

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General Guide

 The illustration below shows which buttons you need to press to navigate between 

modes.

 In any mode (except when a setting screen is on the display), press 

B

 to illuminate 

the display.

 You can enter the Digital Compass/Thermometer Mode from the Timekeeping Mode 

by pressing 

D

. To enter from another mode, first use 

C

 to enter the Timekeeping 

Mode, and then press 

D

.

Press 

C

.

Timekeeping Mode

Digital Compass/

Thermometer Mode

Press 

D

.

Press 

C

.

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To do this:

Enter this mode:

See:

Use the countdown timer

Countdown Timer 
Mode

E-52

Set an alarm time

Alarm Mode

E-55

* Coordinated Universal Time (UTC) is the global time standard used to regulate time.

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Mode Reference Guide

Your watch has 6 “modes”. The mode you should select depends on what you want to do.

To do this:

Enter this mode:

See:

 View the current time and date in your Home City and the 

current time in the Local Time City

 Configure the Daylight Saving Time (DST) settings of your 

Home City and Local Time City

 Configure the time and date settings of your Home City 

and the time setting of the Local Time City

Timekeeping Mode

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 Determine north and the bearing to a destination

 Determine the temperature at your current location

Digital Compass/
Thermometer Mode

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 View the current time in one of 48 cities (31 time zones) 

and UTC* time

 Simultaneously view the current time in your World Time 

City, Home City, and Local Time City.

World Time Mode

E-47

Use the stopwatch to measure elapsed time

Stopwatch Mode

E-50

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Alarms ……………………………………………………………………………………E-55

To set an alarm time ……………………………………………………………E-56
To test the alarm  ………………………………………………………………E-57
To turn an alarm and the hourly time signal on and off  ……………………E-58

Illumination ……………………………………………………………………………E-59

To turn on illumination  …………………………………………………………E-60
To change the illumination duration  …………………………………………E-60

Reference ………………………………………………………………………………E-62

To turn the button operation tone on and off …………………………………E-63

Specifications …………………………………………………………………………E-67

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To perform magnetic declination correction  …………………………………E-37
To take a temperature reading  ………………………………………………E-42
To calibrate the temperature sensor  …………………………………………E-45
To specify the temperature display unit ………………………………………E-46

World Time ………………………………………………………………………………E-47

To view the time in another city  ………………………………………………E-48
To toggle a city code time between Standard Time and 

Daylight Saving Time  ………………………………………………………E-48

To swap your World Time City and Local Time City  ………………………E-49

Stopwatch ………………………………………………………………………………E-50

To measure times with the stopwatch  ………………………………………E-51

Countdown Timer………………………………………………………………………E-52

To configure countdown start time and auto-repeat settings ………………E-53
To use the countdown timer ……………………………………………………E-54

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Contents

Mode Reference Guide  ……………………………………………………………… E-6

General Guide  ………………………………………………………………………… E-8

Timekeeping ……………………………………………………………………………E-10

To set your Home City time and date …………………………………………E-12
To toggle the Timekeeping Mode time between DST and 

Standard Time  ………………………………………………………………E-16

To specify the Local Time City…………………………………………………E-18
To toggle a Local Time City time between Standard Time and 

Daylight Saving Time  ………………………………………………………E-19

To swap your Home City and Local Time City ………………………………E-20

Digital Compass/Thermometer  ……………………………………………………E-23

To enter and exit the Digital Compass/Thermometer Mode  ………………E-24
To take a direction reading  ……………………………………………………E-27
To calibrate the bearing sensor  ………………………………………………E-35

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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. Further details and technical information can be 
found in the “Reference” section.

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ENGLISH

Warning!

 The measurement functions built into this watch are not intended for use in 

taking measurements that require professional or industrial precision. Values 
produced by this watch should be considered as reasonably accurate 
representations only.

 When engaging in mountain climbing or other activities in which losing your 

way can create a dangerous or life-threatening situation, always be sure to use 
a second compass to confirm direction readings.

 Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any 

damage or loss suffered by you or any third party arising through the use of 
your watch or its malfunction.

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your 
purchase, be sure to read this manual carefully.

Applications

The built-in sensors of this watch measure direction and temperature. Measured 
values are then shown on the display. Such features make this watch useful when 
hiking, mountain climbing, or when engaging in other such outdoor activities.

E

MO1610-EA

© 2016 CASIO COMPUTER CO., LTD.

Summary of Contents for 3451

Page 1: ...g Time E 48 To swap your World Time City and Local Time City E 49 Stopwatch E 50 To measure times with the stopwatch E 51 Countdown Timer E 52 To configure countdown start time and auto repeat settings E 53 To use the countdown timer E 54 E 3 Contents Mode Reference Guide E 6 General Guide E 8 Timekeeping E 10 To set your Home City time and date E 12 To toggle the Timekeeping Mode time between DST...

Page 2: ...he month or day For details about the above settings see Timekeeping page E 66 5 Press A to exit the setting screen For details about other settings refer to the sections below Button Operation Tone To turn the button operation tone on and off page E 63 Illumination Duration To change the illumination duration page E 60 See Daylight Saving Time DST Setting below for details about the DST setting E...

Page 3: ...ings manually by performing the procedure below See Magnetic North and True North page E 39 for information about the two types of north For information about maximizing digital compass accuracy see Calibrating the Bearing Sensor page E 33 and Digital Compass Precautions page E 39 E 25 2 Press C to return to the Timekeeping Mode For information about using the digital compass see To take a directi...

Page 4: ...segments are displayed in the bearing indicator dial 3 Press D This will cause the segments of the dial to disappear in clockwise sequence one by one E 34 Magnetic Declination Correction With magnetic declination correction you input a magnetic declination angle difference between magnetic north and true north which allows the watch to indicate true north You can perform this procedure when the ma...

Page 5: ...n the temperature sensor to its factory default calibration press D and B at the same time 4 To exit the calibration screen press A l l l l l l l l l l ll Current temperature calibration value E 44 Important Incorrectly calibrating the temperature sensor can result in incorrect readings Carefully read the following before doing anything Compare the readings produced by the watch with those of anot...

Page 6: ... performed in the Alarm Mode which you enter by pressing C page E 9 Home time Alarm number Alarm time Hour Minutes E 54 While the auto repeat on off setting ON or OFF is flashing on the display press D to toggle auto repeat on ON and off OFF 4 Press A to exit the setting screen The auto repeat on indicator is displayed on the Countdown Timer Mode screen while this function is turned on Frequent us...

Page 7: ...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 E 64 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 var...

Page 8: ...oscow 03 0 JED Jeddah THR Tehran 03 5 DXB Dubai 04 0 City Code City UTC Offset GMT Differential KBL Kabul 04 5 KHI Karachi 05 0 DEL Delhi 05 5 KTM Kathmandu 05 75 DAC Dhaka 06 0 RGN Yangon 06 5 BKK Bangkok 07 0 SIN Singapore 08 0 HKG Hong Kong BJS Beijing TPE Taipei L 1 City Code Table City Code City UTC Offset GMT Differential PPG Pago Pago 11 0 HNL Honolulu 10 0 ANC Anchorage 09 0 YVR Vancouver ...

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