Casio 2273 Gebruikershandleiding - Pagina 8
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Auto light switch precautions
• Avoid wearing the watch on the inside of your wrist. Doing so causes the
auto light switch to operate when it is not needed, which shortens battery
life. If you want to wear the watch on the inside of your wrist, turn off the
auto light switch feature.
• The backlight may not light if the face of the
More than 15 degrees
too high
watch is more than 15 degrees above or
below parallel. Make sure that the back of
your hand is parallel to the ground.
• The backlight turns off in about one second,
even if you keep the watch pointed towards
your face.
• Static electricity or magnetic force can interfere with proper operation of the
auto light switch. If the backlight does not light, try moving the watch back
to the starting position (parallel with the ground) and then tilt it back toward
you again. If this does not work, drop your arm all the way down so it
hangs at your side, and then bring it back up again.
• Under certain conditions, the backlight may not light until about one second
after you turn the face of the watch towards you. This does not necessarily
indicate malfunction of the backlight.
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" below.
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 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.
• 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.
To perform bidirectional calibration
1. Enter the Digital Compass Mode.
2. Hold down A until the upper display area
changes to show
the setting screen.
• At this time, the magnetic north pointer
3. Place the watch on a level surface facing any direction you want, and
press B to calibrate the first direction.
• When the calibration procedure is complete, the message
appears in the upper display area. This soon changes to
the magnetic north pointer flashes at the 6 o'clock position to indicate
that the watch is ready for the second direction.
4. Rotate the watch 180 degrees.
5. Press B again to calibrate the second direction.
• When the calibration procedure is complete, the message
appears in the upper display area. After a short while, the watch
automatically returns to the Digital Compass Mode screen.
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.
• Do not move the watch during the one or two seconds (from the point you
press B up to the point that
the calibration of each direction is in progress. If you do, the message
appears in the upper display area, which means you have to
restart the bidirectional calibration procedure from the beginning.
• The appearance of
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 taking direction readings. If you plan to
take direction readings in an open field, for example, calibrate in an open
field.
To perform northerly calibration
1. While in the Digital Compass Mode, hold
down A until the upper display area
changes to show
the setting screen.
2. Press D to start the northerly calibration
procedure.
• At this time, the indicator (direction
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 B to start the calibration operation.
• When the calibration procedure is complete, the message
appears in the upper display area. After a short while, the watch
automatically returns to the Digital Compass Mode screen.
Changing the Barometric Pressure and Temperature
Units
Changing the barometric pressure units automatically restarts the barometric
pressure graph.
To change the Barometric Pressure and Temperature Units
1. Enter the Barometer/Thermometer Mode.
2. Hold down A until the message
appears (flashing), which indicates the
setting screen.
• A temperature value appears instead of
3. Press D to move the flashing to the unit setting you want to change
°
°
(
C/
F or hPa[mb]/inHg).
• Pressing D moves the flashing in the sequence shown below.
Barometric
Temperature
Pressure
Calibration
Calibration
4. Press E or B to select the unit you want.
5. Press A to return to the Barometer/Thermometer Mode screen.
2273-8
, which indicates
flashes at the 12 o'clock position to
indicate that the watch is ready to
calibrate the first direction.
and
appears in the upper display area) that
, which indicates
appears in the upper display area.
OFF
(factory calibration) if you
OFF
previously calibrated the temperature
sensor.
°C / °F
hPa[mb]/inHg
)