Casio 3047 Operation Manual page 12

Digital Compass Precautions
This watch features a built-in magnetic bearing sensor that detects terrestrial
magnetism. This means that north 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
• 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 direction readings are impossible while in a train, boat, air plane,
etc.
• Accurate readings are also impossible indoors, especially inside ferro-
concrete structures. This is because the metal framework of such structures
picks up magnetism from appliances, etc.
Storage
• The precision of the bearing sensor 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 Bearing
Sensor".
Calibrating the Bearing Sensor
Whenever you suspect that direction readings produced by the watch are
wrong, you should calibrate it. You can use either one of two calibration
procedures: bidirectional calibration or northerly calibration .
Use bidirectional calibration when you want to take readings within an area
exposed to magnetic force. This type of calibration should be used if the
watch becomes 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.
• The more correctly you perform bidirectional calibration, the better the
accuracy of the bearing sensor readouts. You should perform bidirectional
calibration whenever you change environments where you use the bearing
sensor, and whenever you feel that the bearing sensor is producing
incorrect readings.
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
bearing sensor readings.
• Make sure that you do not move the watch while calibration of either
direction is in progress.
• You should perform bidirectional calibration in an environment that is the
same as that where you plan to be taking direction readings. If you plan to
take direction readings in an open field, for example, calibrate in an open
field.
To perform bidirectional calibration
1. Enter the Digital Compass Mode.
2. Hold down E until
display, which indicates the setting screen.
• At this time, the magnetic north pointer
flashes at the 12 o'clock position to indicate
that the watch is ready to calibrate the first
direction.
3. Place the watch on a level surface facing any direction you want, and
press A to calibrate the first direction.
•
xxx is shown on the display while calibration is being performed.
appears, appears in the center part of the display, and the
x2x
magnetic north pointer flashes at the 6 o'clock position when calibration
of the first direction is complete. This means that the watch is ready for
calibration of the second direction.
4. Rotate the watch 180 degrees.
Operation Guide 3047
x1x appears on the
OK
5. Press A again to calibrate the second direction.
•
xxx is shown on the display while calibration is being performed. When
calibration is complete, OK appears and then the Digital Compass Mode
screen (showing the angle value) appears.
• If
xxx appears and then changes to
screen, it means that there is something wrong with the sensor. The
message will disappear after about one second. Try performing the
calibration operation again. If ERR
dealer or nearest authorized CASIO distributor to have the watch checked.
To perform northerly calibration
1. While in the Digital Compass Mode, hold
down E until
which indicates the setting screen.
2. Press D to start the northerly calibration
procedure.
• At this time,
display.
3. Place the watch on a level surface, and position it so that its 12 o'clock
position points north (as measured with another compass).
4. Press A to start the calibration operation.
•
---
is shown on the display while calibration is being performed. When
calibration is complete, OK appears and then the Digital Compass Mode
screen (with 0° indicated as the angle value) appears.
• If
---
appears and then changes to
screen, it means that there is something wrong with the sensor. About one
second after the ERR message appears,
performing the calibration operation again. If
contact your original dealer or nearest authorized CASIO distributor to have
the watch checked.
Barometer and Thermometer Precautions
• The pressure sensor built into this watch measures changes in air
pressure, which you can then apply to your own weather predictions. It is
not intended for use as a precision instrument in official weather prediction
or reporting applications.
• Sudden temperature changes can affect pressure sensor readings.
• Temperature measurements are affected by your body temperature (while
you are wearing the watch), direct sunlight, and moisture. To achieve a
more accurate temperature measurement, remove the watch from your
wrist, place it in a well ventilated location out of direct sunlight, and wipe all
moisture from the case. It takes approximately 20 to 30 minutes for the
case of the watch to reach the actual surrounding temperature.
Calibrating the Temperature Sensor
The temperature sensor of this watch is calibrated at the factory before
shipment, and further adjustment normally is not required. If you notice
serious errors in the temperature readings produced by the watch, you can
calibrate the sensor to correct the errors.
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 another reliable
and accurate thermometer.
• If adjustment is required, remove the watch from your wrist and wait for 20
or 30 minutes to give the temperature of the watch time to stabilize.
To calibrate the temperature sensor
1. Enter the Barometer/Thermometer Mode.
2. Hold down E until
display area.
3. Release E. After about three or four seconds,
either
(if one is set) will appear in the lower part of
the display. This is the setting screen.
4. Wait four or five seconds until either
calibration value (if there is one set) appears in the center part of the display.
5. After waiting four or five seconds, press C (+) or A (–) to change the
displayed temperature by 0.1°C (or 0.2°F).
• Pressing C and A at the same time returns to the factory calibration
( OFF ).
6. Press E to exit the setting screen.
Calibrating the Barometric Pressure Sensor
The pressure sensor of this watch is calibrated at the factory before shipment
and further adjustment normally is not required. If you notice serious errors in
the barometric pressure readings produced by the watch, you can calibrate
the sensor to correct the errors.
Important!
Incorrectly calibrating the barometric pressure sensor can result in incorrect
readings. Before performing the calibration procedure, compare the readings
produced by the watch with those of another reliable and accurate barometer.
ERR (error) on the calibration
ERR
keeps appearing, contact your original
appears on the display,
x1x
-N- (north) appears on the
ERR (error) on the calibration
-N- will reappear. Try
ERR keeps appearing,
appears in the upper
SET
OFF or a temperature calibration value
OFF or a barometric pressure
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