Casio 2198 General Manual - Page 6

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Casio 2198 General Manual

BAROMETER FUNCTIONS

This watch uses a pressure sensor to measure air pressure. This sensor can
be calibrated.
Important!
The barometer that is 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.
Example barometer applications
• Before going mountain climbing, you can take readings to find out the
probable upcoming weather.
• You can predict the weather for golf or other outdoor activities.
About barometric measurements
The barometer automatically takes measurements every two hours (starting from
midnight), regardless of what mode you are in. The last measurement result, along
with the current temperature is displayed in the Timekeeping Mode.
Understanding the barometer screen
1. Use C to enter the Timekeeping Mode.
2. Press D to display the Barometric Pressure/Temperature screen.
• See "Barometric Pressure/Temperature Screen Auto Cancel".
A
Temperature
P
C
[ Barometric Pressure/Temperature ]
1 The barometric pressure graph shows the barometric readings for the
*
past 26 hours. The flashing point on the right of the display is the point for
the last measurement.
2 The display shows "– – – – hPa/mb" (or inHg) if a measured value falls
*
outside the range of 460 hPa/mb to 1100 hPa/mb (13.55 inHg to 32.45
inHg). The normal display will return as soon as the pressure returns
within the allowable range.
Using the barometric pressure graph
Changes in barometric pressure are caused by changes in the weather and
temperature. The following shows how to interpret the data that appears on
the barometric pressure graph.
A rising graph generally means better
weather.
A falling graph generally means deteriorating
weather.
Note that if there are sudden changes in weather or
temperature, the graph line of past measurements
may run off the top or bottom of the display. The entire
graph will become visible once barometric conditions
stabilize.
The following conditions cause the barometric pressure measurement to be
skipped, with the corresponding point on the barometric pressure graph
being left blank.
• Barometric reading that is out of range (460 hPa/mb to 1100 hPa/mb or
13.55 inHg to 32.45 inHg)
• Sensor malfunction
• Dead batteries
Calibrating the barometric pressure measurement
The sensor of this watch is calibrated at the factory before shipment and
further adjustment is normally not required. If noticeable error is found in the
barometric pressure readings produced by the watch, you can adjust it to
correct the error.
Important!
Incorrectly calibrating the barometric pressure measurement of this watch
can result in incorrect readings. Compare the readings produced by the
watch with those of another reliable, accurate barometer.
B
Barometric pressure
*
1
graph
(unit: 1 hPa/0.05 inHg)
hPa mb
°
Last measurement
C
(updated every 2 hours)
A S
D
E
To calibrate the barometric pressure
A
°
C
C
E
4. Each press of D increases the displayed barometric pressure by 1 hPa/
mb, while pressing B decreases it. Holding down either button changes
the value at high speed.
• If you have selected inHg as your unit of measurement, the above operations
change the reading by 0.05 inHg.
• Pressing B and D at the same time returns to the "OFF" display.
5. After calibrating the barometric pressure, press A to return to the
Barometric Pressure/Temperature screen.
• If you do not operate any button for a few minutes while the barometric
pressure digits are flashing, the flashing stops and the watch goes back to
the Barometric Pressure/Temperature screen.

THERMOMETER FUNCTIONS

A built-in temperature sensor measures temperature and shows the measured
value on the display. The thermometer can be calibrated.
Important!
*
2
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 off all moisture
from the case. It takes approximately 20 to 30 minutes for the case of the
watch to reach the actual surrounding temperature.
About temperature measurements
Temperature measurements are taken automatically every five minutes,
regardless of what mode the watch is in. Measured temperature values can
be viewed in the Timekeeping or Altimeter Modes. Temperature measurements
are taken every five seconds for the first three minutes after you display the
Timekeeping Mode's barometric pressure/temperature display, or after you
enter the Altimeter Mode. After that, temperature measurements are taken
every five minutes.
• Temperature measurement data can be recalled along with altitude
measurement data.
Understanding the temperature screen
1. Use C to enter the Timekeeping Mode.
2. Press D to display the Barometric Pressure/Temperature screen.
• See "Barometric Pressure/Temperature Screen Auto Cancel" .
Temperature
• The display shows "– –. – °C" (or °F) if a measured value falls outside the
range of –10.0°C to 60.0°C (14.0°F to 140.0°F). The normal display will
return as soon as the temperature returns within the allowable range.
• For details on viewing the temperature in the Altimeter Mode, see
"Understanding the altimeter display".
Calibrating the temperature measurement
The temperature sensor of this watch is calibrated at the factory before
shipment and further adjustment is normally not required. If noticeable error
is found in the temperature readings produced by the watch, you can adjust it
to correct the error.
Important!
Incorrectly calibrating the temperature measurement of this watch can result in
incorrect readings. Carefully read the following before doing anything.
• Compare the readings produced by the watch with those of another reliable,
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.
1. Display the barometric pressure and
temperature in the Timekeeping Mode.
B
2. Hold down A until the display clears.
"OFF" or the temperature value should be
flashing on the display.
hPa mb
3. Press C to show the barometric pressure
calibration display. At this time, "OFF" or
the barometric pressure value should be
A S
flashing on the display.
D
• The "OFF" indicator appears when the
factory setting is being used for the
calibration.
B
A
hPa mb
°
C
P
A S
C
D
E
[ Barometric Pressure/Temperature ]
1998/2198-6