Casio 3439 Operation Manual Download Page 4

E-24

To perform magnetic declination correction

1. In the Digital Compass Mode, hold down 

E

 for at least two seconds. 

First,

SET Hold

 will fl ash on the display. After that, 

CALIBRATION

 will 

scroll across the upper display. Keep 

E

 depressed until 

CALIBRATION

 starts scrolling.

2. Press 

D

.

DEC 0°

 will appear on the display and then the current magnetic 

declination angle setting will fl ash on the display.

3. Use 

A

 (East) and 

C

 (West) to change the settings.

The following explains magnetic declination angle direction 
settings.

OFF

: No magnetic declination correction performed. The magnetic 

declination angle with this setting is 0°.

E

:        When magnetic north is to the east (east declination)

W

:       When magnetic north is to the west (west declination)

 You can select a value within the range of W 90° to E 90° with 

these settings.

 You can turn off (

OFF

) magnetic declination correction by pressing 

A

 and 

C

 at the same time.

 The illustration, for example, shows the value you should input 

and the direction setting you should select when the map shows a 
magnetic declination of 1° West.

4. When the setting is the way you want, press 

E

 to exit the setting 

screen.

Magnetic declination angle 
direction value (E, W, or OFF)

Magnetic declination 
angle value

Magnetic declination angle 
direction value (E, W, or OFF)

Magnetic declination 
angle value

E-25

Using Bearing Memory

Bearing Memory lets you temporarily store and display a direction 
reading so you can use it as a reference as you take subsequent digital 
compass readings. The Bearing Memory screen displays the direction 
angle for the stored reading, along with a pointer that indicates the stored 
reading.
When you take digital compass readings while the Bearing Memory 
screen is displayed, the direction angle of the current digital compass 
reading (as read from the 12 o’clock position of the watch) and the stored 
Bearing Memory direction reading will both be shown.

To store a direction angle reading in Bearing Memory

1. Press 

C

 to start a digital compass reading operation (page E-19).

 This will take an initial reading and then take readings every 

second for 60 seconds.

 If a bearing memory direction angle value is already displayed, it 

means that there is a reading already stored in Bearing Memory. If 
this happens, press 

E

 to clear the Bearing Memory reading and 

exit the bearing memory screen before performing the above step.

2. During the 60 seconds that digital compass readings are being taken, press 

E

 to store the current 

reading in Bearing Memory.

 The Bearing Memory direction angle fl ashes for about one second as it is stored in Bearing 

Memory. After that, the Bearing Memory screen (which shows the bearing memory direction angle 
and pointer) will appear, and a new 60-second direction reading operation will start.

12 o’clock position

North pointer

Direction 
angle of 
current 
reading

Bearing Memory 

Screen

Bearing
memory 
direction 
angle value

Pointer to bearing 
in bearing memory

12 o’clock position

North pointer

Direction 
angle of 
current 
reading

Bearing Memory 

Screen

Bearing
memory 
direction 
angle value

Pointer to bearing 
in bearing memory

E-26

 You can press 

C

 at any time while the Bearing Memory screen is displayed, to start a new 

60-second direction reading operation. Doing so will display the direction angle for the direction 
that the 12 o’clock position of the watch is pointed. The direction angle of the current reading will 
disappear from the display after the 60-second direction reading operation is complete.

 During the fi rst 60 seconds after you display the Bearing Memory screen or during a 60-second 

direction reading operation you triggered by pressing 

C

 while the Bearing Memory screen is on 

the display, the direction stored in memory is indicated by a Bearing Memory pointer.

 Pressing 

E

 while the Bearing Memory screen is displayed will clear the reading currently in 

Bearing Memory and start a new 60-second direction reading operation.

Setting a map and fi nding your current location

Having an idea of your current location is important when mountain climbing or hiking. To do this, you 
need to “set the map”, which means to align the map so the directions indicated on it are aligned with the 
actual directions of your location. Basically what you are doing is aligning north on the map with north as 
indicated by the watch.

 Note that map reading skills and experience are required to determine your current location and 

destination on a map.

E-27

Digital Compass Precautions
Magnetic North and True North

The northerly direction can be expressed either as magnetic north or true 
north, which are different from each other. Also, it is important to keep in mind 
that magnetic north moves over time.

 Magnetic north is the north that is indicated by the needle of a compass.

 True north, which is the location of the North Pole of the Earth’s axis, is the 

north that is normally indicated on maps.

 The difference between magnetic north and true north is called the 

“declination”. The closer you get to the North Pole, the greater the 
declination angle.

Location

 Taking a direction reading when you are near a source of strong magnetism can cause large errors in 

readings. Because of this, you should avoid taking direction readings while in the vicinity of the 
following types of objects: permanent magnets (magnetic necklaces, etc.), concentrations of metal 
(metal doors, lockers, etc.), high tension wires, aerial wires, household appliances (TVs, personal 
computers, washing machines, freezers, etc.)

 Accurate readings are also impossible indoors, especially inside ferroconcrete structures. This is 

because the metal framework of such structures picks up magnetism from appliances, etc.

 Accurate direction readings are impossible while in a train, boat, air plane, etc.

True north

Earth

Magnetic north

True north

Earth

Magnetic north

E-28

Storage

 The precision of the bearing sensor may deteriorate if the watch becomes magnetized. Because of 

this, you should store the watch away from magnets or any other sources of strong magnetism, 
including: permanent magnets (magnetic necklaces, etc.), concentrations of metal (metal doors, 
lockers, etc.), and household appliances (TVs, personal computers, washing machines, freezers, etc.)

 Whenever you suspect that the watch may have become magnetized, perform the procedure under “To 

perform bidirectional calibration” (page E-23).

E-29

Specifying Temperature, Barometric Pressure, and Altitude Display Units

Use the procedure below to specify the temperature, barometric pressure, and altitude display units to be 
used in the Barometer/Thermometer Mode and the Altimeter Mode.

Important!

 When 

TYO

 (Tokyo) is selected as the Home City, the altitude unit is set automatically to meters (

m

), the 

barometric pressure unit to hectopascals (

hPa

), and the temperature unit to Celsius (

°C

). These 

settings cannot be changed.

To specify temperature, barometric pressure, and altitude display units

1. In the Timekeeping Mode, hold down 

E

 for at least two seconds. 

First,

SET Hold

 will fl ash on the display, and 

CITY

 will be displayed in 

the upper display. After that, the currently selected city code and city 
name will scroll across the upper display. Keep 

E

 depressed until the 

scrolling starts.

2. Press 

D

 as many times as necessary until 

UNIT

 appears on the 

display.

 See the sequence in step 2 of the procedure under “To change the 

current time and date settings” (page E-16) for information about 
how to scroll through setting screens.

E-30

3. Perform the operations below to specify the display units you want.

To specify this unit:

Press this key:

To toggle between these settings:

Altitude

A

m

 (meters) and 

ft

 (feet)

Barometric Pressure

B

hPa

 (hectopascals) and 

inHg

 (inches of mercury)

Temperature

C

°C

 (Celsius) and 

°F

 (Fahrenheit)

4. After all of the settings are the way you want, press 

E

 twice to exit the setting screen.

E-31

Taking Barometric Pressure and Temperature Readings

This watch uses a pressure sensor to measure air pressure (barometric pressure) and a temperature 
sensor to measure temperature.

To take barometric pressure and temperature readings

While in the Timekeeping Mode or in any of the sensor modes, press 

B

to take barometric pressure and temperature readings.

BARO

 will appear on the display, indicating that barometric 

pressure and temperature reading are in progress. The results 
will appear on the display after about one second.

 After you press 

B

, the watch will take readings every fi ve seconds 

for the fi rst three minutes, and then every two minutes after that.

Note

 Press 

D

 to return to the Timekeeping Mode.

 The watch will return to the Timekeeping Mode automatically if you 

do not perform any operation for about 1 hour after entering the 
Barometer/Thermometer Mode.

Barometric
pressure graph

Barometric
pressure

Pressure
differential
pointer

Temperature

Barometric
pressure graph

Barometric
pressure

Pressure
differential
pointer

Temperature

Operation Guide 3439

Summary of Contents for 3439

Page 1: ...check before using the watch 1 Check the Home City and the daylight saving time DST setting Use the procedure under To configure Home City and summer time settings page E 14 to configure your Home City and daylight saving time settings Important World Time Mode and Sunrise Sunset Mode data depend on correct Home City time and date settings in the Timekeeping Mode Make sure you configure these setting...

Page 2: ...Sunset Data Recall Alarm Digital Compass 3 minutes Altimeter 1 hour minimum 12 hours maximum Barometer Thermometer 1 hour Setting screen digital setting flashing 3 minutes If you leave a screen with flashing digits on the display for two or three minutes without performing any operation the watch exits the setting screen automatically Initial Screens When you enter the Data Recall Alarm World Time o...

Page 3: ...way from the source of strong magnetism perform bidirectional calibration and then try taking a reading again For more information refer to To perform bidirectional calibration page E 23 and Location page E 27 Digital Compass Readings When you press C to start digital compass reading operation COMP will initially appear on the display to indicate that a digital compass operation is in progress Aft...

Page 4: ...ding skills and experience are required to determine your current location and destination on a map E 27 Digital Compass Precautions Magnetic North and True North The northerly direction can be expressed either as magnetic north or true north which are different from each other Also it is important to keep in mind that magnetic north moves over time Magnetic north is the north that is indicated by...

Page 5: ...es in pressure If it determines there has been a significant change in pressure it will beep and all of the graphic segments around the periphery of the face will flash as a barometric pressure change alert This means you could start taking barometric pressure readings after reaching a lodge or camp area and then check the watch the next morning for changes in pressure and plan you day s activities ...

Page 6: ... 00 will be flashing in the center display 3 Press A to toggle the altitude auto measurement interval setting between 0 05 and 2 00 4 Press E to exit the setting screen E 44 Taking Altitude Readings Use the procedure below to take basic altitude readings See Using Reference Altitude Values page E 46 for information about how to make altimeter readings more accurate See How does the altimeter work p...

Page 7: ... Mode Cumulative ascent and cumulative descent values are updated whenever there is a difference of at least 15 meters 49 feet from one reading to the next E 52 Trek Log Values While trek log updating is enabled altitude values high altitude low altitude cumulative ascent descent for a particular trek are automatically checked and updated at regular intervals even if you exit the Altimeter Mode Va...

Page 8: ...has been deleted or if there is no corresponding MAX MIN data due to error etc In such cases total ascent ASC and total descent DSC values will show zero When the total ascent ASC or total descent DSC exceeds 99 999 meters or 327 997 feet the applicable value will restart from zero Note that the watch can display up to five digits only When using feet as the altitude display units altitude values a...

Page 9: ... within following ranges Latitude Range 65 0 S South 65 0 degrees to 0 N to 65 0 N North 65 0 degrees Longitude Range 179 9 W West 179 9 degrees to 0 E to 180 0 E East 180 0 degrees Latitude and longitude values are rounded off to the nearest degree 6 Press E to return to the Timekeeping Mode 7 In the Timekeeping Mode press D Display the location whose sunrise and sunset times you want to view Lat...

Page 10: ...nt time in the currently selected World Time City E 77 To specify standard time or daylight saving time DST for a city 1 In the World Time Mode use A East and C West to scroll through the available city codes Keep scrolling until the city code whose Standard Time Daylight Saving Time setting you want to change is displayed 2 Hold down E for at least two seconds Keep E depressed until the current s...

Page 11: ... from the elevation and or sea level altitude indications in my area Negative sea level altitude values are produced in a location where the indicated elevation is a positive value I can t get correct altitude readings Relative altitude is calculated based on changes in barometric pressure measurement by its pressure sensor This means that barometric pressure changes can cause readings taken at di...

Page 12: ... C 50 F to 104 F North pointer Within 2 digital segments Pressure Sensor Precision Measurement accuracy Within 3hPa 0 1 inHg Altimeter accuracy Within 75m 246 ft Values are guaranteed for a temperature range of 10 C to 40 C 14 F to 104 F Precision is lessened by strong impact to either the watch or the sensor and by temperature extremes E 91 Temperature Sensor Precision 2 C 3 6 F in range of 10 C ...

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