To Perform Fi Gure 8 Calibration - Casio 3445 Operation Manual

To perform 3-point calibration
Important!
• Proper declination correction will not be possible if the watch is on a
metal surface or a magnetized surface.
• When setting Point 2, properly point the watch in the direction that 180°
opposite that of Point 1.
• When setting Point 3, properly turn the watch over 180°.
1. In the Digital Compass Mode, hold down A for at least two seconds.
• SET Hold will fl ash on the display and then CAL will appear. Keep
A depressed until CAL appears.
2. Press C.
• This will cause
up arrow ( ) fl ashing.
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4. Leaving the watch pointed upwards, rotate it as precisely as possible
180 degrees from point 1.
5. Keeping the watch parallel to the ground, press D to calibrate Point 2.
• WAIT is shown on the display while calibration is being performed.
• When calibration is successful, the words TURN and OVER will
alternate on the display. After that, -3- will appear on the display.
• If calibration fails for some reason, return to step 2 of this
procedure and try again.
6. Turn over the watch so its face is pointed at the ground.
• In this case, it makes no difference what direction the 12 o'clock
position of the watch is pointed.
7. With the watch pointed downwards and parallel with the ground as
shown in the illustration, press D.
• This starts calibration of Point 3.
• WAIT is shown on the display while calibration is being performed.
• If calibration is successful, the watch will beep once. Also, the
watch will display OK and start taking a direction reading. This
indicates that calibration is complete.
• If the watch beeps three times and displays ERR, perform the
procedure from step 3 again.
L D
ground
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Using Bearing Memory
Bearing Memory lets you temporarily store and display a direction reading
12 o'clock position
so you can use it as a reference as you take subsequent digital compass
Pointer to bearing
readings. The Bearing Memory screen displays the direction angle for the
in bearing memory
stored reading, along with a pointer that indicates the stored reading.
When you take digital compass readings while the Bearing Memory
North pointer
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 D to start a digital compass reading operation (page E-64).
• This will take an initial reading and then take readings every
second for 60 seconds.
Bearing memory
• If a bearing memory direction angle value is already displayed, it
direction angle
means that there is a reading already stored in Bearing Memory. If
value this happens, press A to clear the Bearing Memory reading and
exit the bearing memory screen before performing the above step.
Direction angle of
current reading
Bearing Memory
Screen
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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 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 also impossible while in a train, boat, air plane, etc.
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 fi gure 8 calibration" (page E-70) or "To perform 3-point calibration" (page E-72).
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Operation Guide 3445
-1- CAL to appear on the digital display, with an
3. With the watch pointed upwards and parallel with the ground as shown
D L
in the illustration, press D.
• WAIT will be shown on the digital display while calibration of Point
1 is in progress. Turn 180° will appear on the digital display if
calibration is successful, and then
• If calibration fails for some reason, return to step 2 of this
ground
procedure and try again.
To perform magnetic declination correction
• Keep the watch level and don't move it during the calibration process.
• For information about magnetic declination, see "Magnetic North and True North" (page E-77).
1. In the Digital Compass Mode, hold down A for at least two seconds.
Magnetic declination angle
SET Hold will fl ash on the display and then CAL will appear. Keep A
direction value (E, W, or OFF)
depressed until CAL appears.
2. Press C twice.
• DEC will appear on the display and then the current magnetic
declination angle setting will fl ash on the display.
3. Use D (East) and L (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°.
Magnetic declination
When magnetic north is to the east (east declination)
E:
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
D and L 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 A to exit the setting
screen.
2. During the 60 seconds that digital compass readings are being taken, press A to store the current
reading in Bearing Memory.
• The Bearing Memory direction angle is displayed 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.
You can press D 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 D while the Bearing Memory screen is on
the display, the direction stored in memory is indicated by a Bearing Memory pointer.
Pressing A while the Bearing Memory screen is displayed will clear the reading currently in
•
Bearing Memory and start a new 60-second direction reading operation.
Digital Compass Precautions
Magnetic North and True North
The northerly direction can be expressed either as magnetic north or true
True north
north, which are different from each other. Also, it is important to keep in
mind that magnetic north moves over time.
Magnetic north
• 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
Earth
"declination". The closer you get to the North Pole, the greater the
declination angle.
Viewing Time Stamp Records (Time Recall)
You can use the Time Recall Mode to view time stamp records you created in the Timekeeping Mode and
other modes.
To create a time stamp record
To create a time stamp record, hold down B for about one second in any mode until the watch beeps.
• REC will appear on the display, indicating that a record of the current date and time was created.
To view time records
1. In the Timekeeping Mode, press C twice.
Record number
• This enters the Time Recall Mode. REC appears on the display for
one second, followed by the newest time record.
• Refer to page E-26 for information about navigating between modes.
Pressing A displays the date (year, month day) and time for about
•
two seconds.
2. Use D to select the record you want.
Each press of D scrolls through log records in sequence, from
•
newest (record number -01-) to the oldest (record number -20-).
Pressing D displays the previous record, pressing again displays
•
Date (month, day)
the record before that one, and so on.
Holding down D scrolls log records at high speed.
•
Time
• Records are numbered so an older record has a lower number.
-2- will appear.
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