Changing The Measurement Units - Casio 1998 General Manual

• Each memory area is identified by a number from 1 through 5. The Normal
screen shows the current time and date without a memory number.
• If the memory area you select already contains data, that data appears on
the display whenever the memory area is selected. Performing a Digital
Compass operation replaces the existing data with the newly measured
data.
2. Use the same procedures as described in steps 1 through 4 under
"To take a direction reading without storing data into memory".
To recall data from memory
While in the Digital Compass Mode, use D
Magnetic north indicator
to scroll through the data in the following
Direction
Date
sequence.
A B
P
To delete data
BEARING A S
1. While in the Digital Compass Mode, scroll
C D
E
2. Hold down A until the displayed value
Time
Memory No.
• Holding down A causes the message
Direction value
"CLR" to appear on the display, followed by
the value changing to "– – –".
Digital Compass Precautions
This watch features a built-in magnetic bearing sensor that detects terrestrial
magnetism. This means that the northern direction indicated by this watch is
magnetic north, which is somewhat different from true polar north. The
magnetic north pole is located in northern Canada, while the magnetic south
pole is in southern Australia. Note that the difference between magnetic north
and true north as measured with all magnetic compasses tends to be greater
as one gets closer to either of the magnetic poles. You should also remember
that some maps indicate true north (instead of magnetic north), and so you
should make allowances when using such maps with this watch.
Location
• Using the Digital Compass when you are near a source
of strong magnetism can cause large errors in readings.
Because of this, you should avoid using the Digital
Compass 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 direction measurements are impossible while in a train, boat, air
plane, etc.
• Accurate measurements are also impossible indoors, especially inside
ferroconcrete structures. This is because the metal framework of such
structures picks up magnetism from appliances, etc.
Storage
• The precision of the compass may deteriorate if the watch becomes
magnetized. Because of this, you should be sure to store the watch away
from magnets or any other sources of strong magnetism, including:
permanent magnets (magnetic necklaces, etc.) and household appliances
(TVs, personal computers, washing machines, freezers, etc.)
• Whenever you suspect that the watch may have become magnetized,
perform one of the calibration procedures under "Calibrating the Digital
Compass".
Calibrating the Digital Compass
Whenever you suspect that the readings produced by the Digital Compass
are wrong, you should calibrate it. You can use either one of two calibration
procedures: bidirectional calibration or northerly calibration.
You should use bidirectional calibration when you want to calibrate the Digital
Compass to operate within an area exposed to magnetic force. This type of
calibration should be used if the watch become magnetized for any reason.
With northerly calibration, you "teach" the watch which way is north (which
you have to determine with another compass or some other means). You
could use this calibration procedure, for example, to set the watch to indicate
true north instead of magnetic north.
Important!
• If you want to perform both bidirectional and northerly calibration, be sure to
perform bidirectional calibration first, and then perform northerly calibration.
This is necessary because bidirectional calibration cancels any previously
set northerly calibration setting.
• If you do not perform any button operation for two or three minutes while
either calibration procedure is in progress (while the magnetic north indicator
is flashing at the 12 or 6 o'clock position), the watch automatically returns to
the Digital Compass Mode.
Normal
Memory 1 Memory 2
Screen
Memory 5 Memory 4 Memory 3
through the data items and display the one
you want to delete.
changes to "– – –".
• The more correctly you perform bidirectional calibration, the better the
accuracy of your Digital Compass readouts. You should perform bidirectional
calibration whenever you change environments where you use the Digital
Compass, and whenever you feel that the Digital Compass is producing
incorrect readings.
To perform bidirectional calibration
1. While in the Digital Compass Mode (Normal
A B
• At this time, the magnetic north indicator
flashes at the 12 o'clock position to indicate
that the watch is ready to calibrate the first
direction.
2. Place the watch on a level surface, and
BEARING A S
C D
• When the calibration procedure is complete,
E
the message "OK" appears in the upper
display. This soon changes to "–2–" and the
magnetic north indicator flashes at the 6
o'clock position to indicate that the watch is
ready for the second direction.
3. Rotate the watch 180 degrees.
4. Press E again to calibrate the second direction.
• When the calibration procedure is complete, the message "OK" appears in
the upper display. After a short while, the watch automatically returns to the
Digital Compass Mode.
Precautions about bidirectional calibration
• You can use any two opposing directions for bidirectional calibration. You
must, however, make sure that they are 180 degrees opposite each other.
Remember that if you perform the procedure incorrectly, you will get wrong
readings from the Digital Compass.
• Do not move the watch during the one or two seconds (from the point you
press E up to the point that "OK" appears in the upper display) that the
calibration of each direction is in progress. If you do, the message "ERR"
appears in the upper display. When this happens, restart the bidirectional
calibration procedure from the beginning.
• The appearance of "ERR" during bidirectional calibration can also be
caused by local interference. If you suspect that this is the case, move to
another location and try the procedure again.
• You should perform bidirectional calibration in an environment that is the
same as that where you plan to be using the Digital Compass. If you plan to
use it in an open field, for example, calibrate in an open field.
To perform northerly calibration
1. While in the Digital Compass Mode (Normal
B
A
2. Press C to start the northerly calibration
• At this time, the indicator "N" appears in the
upper display.
3. Place the watch on a level surface, and
BEARING A S
C
D
E
4. Press E to start the calibration operation.
• When the calibration procedure is complete, the message "OK" appears in
the upper display. After a short while, the watch automatically returns to the
Digital Compass Mode.

CHANGING THE MEASUREMENT UNITS

You can change the measured values displayed by the watch between the
following units.
Altitude: meters (m) ↔ feet (ft)
Temperatures: Celsius (°C) ↔ Fahrenheit (°F)
Barometric Pressure:
hecto-pascals/millibars (hPa/mb) ↔ inchesHg (inHg)
Some countries call to this unit as hecto-pascal (hPa), while other
countries call it millibars (mb). It really makes no difference, because
1 hPa = 1 mb. In this manual, we will refer to hPa/mb or hPa (mb).
Important!
• Certain measurement functions are automatically terminated when you
change the measurement units. Be sure that you perform this operation
before starting actual measurements.
• Changing the altitude unit of measurement automatically switches off the
altitude alarm, and sets the alarm's value to zero.
• Changing the barometric pressure unit of measurement automatically restarts
the barometric pressure graph from a new value.
• Changing any of the units of measurement immediately starts to display
newly measured data in the unit you specify. It also affects the unit of
measurement for any data already stored in memory.
1998/2198-3
screen), hold down A until the upper
display changes to show "–1–".
press E to calibrate the first direction.
screen), hold down A until the upper
display changes to show "–1–".
procedure.
position it so that its 12 o'clock position
points north (as measured with another
compass).