To Perform Magnetic Declination Correction; To Store A Direction Angle Reading In Bearing Memory; Specifying Temperature, Barometric Pressure, And Altitude Display Units; To Specify Temperature, Barometric Pressure, And Altitude Display Units - Casio 3439 Operation Manual

To perform magnetic declination correction

1. In the Digital Compass Mode, hold down E for at least two seconds.
Magnetic declination angle Magnetic declination angle
First, SET Hold will fl ash on the display. After that, CALIBRATION will
direction value (E, W, or OFF) direction value (E, W, or OFF)
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)
Magnetic declination Magnetic declination
angle value angle value 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.
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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.
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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).
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3. Perform the operations below to specify the display units you want.
To specify this unit: Press this key:
A
Altitude
B
Barometric Pressure
C
Temperature
4. After all of the settings are the way you want, press E twice to exit the setting screen.
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Operation Guide 3439
To toggle between these settings:
m (meters) and ft (feet)
hPa (hectopascals) and inHg (inches of mercury)
°C (Celsius) and °F (Fahrenheit)
Using Bearing Memory
Bearing Memory lets you temporarily store and display a direction
Bearing Bearing
12 o'clock position 12 o'clock position reading so you can use it as a reference as you take subsequent digital
memory memory
direction direction
compass readings. The Bearing Memory screen displays the direction
North pointer North pointer
angle value angle value
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
Direction Direction
angle of angle of second for 60 seconds.
Pointer to bearing Pointer to bearing
current current
• If a bearing memory direction angle value is already displayed, it
in bearing memory in bearing memory
reading reading
means that there is a reading already stored in Bearing Memory. If
this happens, press E to clear the Bearing Memory reading and
Bearing Memory Bearing Memory
exit the bearing memory screen before performing the above step.
Screen Screen
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.
Digital Compass Precautions
Magnetic North and True North
The northerly direction can be expressed either as magnetic north or true
True north True north
north, which are different from each other. Also, it is important to keep in mind
Magnetic north Magnetic north
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
Earth Earth
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.

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.

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
Barometric Barometric
to take barometric pressure and temperature readings.
pressure graph pressure graph
• 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
Pressure Pressure
do not perform any operation for about 1 hour after entering the
differential differential
Barometric Barometric
Barometer/Thermometer Mode.
pointer pointer
pressure pressure
Temperature Temperature
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