Casio 2271 User Manual - Page 2

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DIGITAL COMPASS

A built-in bearing sensor detects magnetic north and indicates one of 16

directions on the display. Direction readings are performed in the Digital

Compass Mode.

• You can calibrate the bearing sensor if you suspect the direction reading is

incorrect.

To enter and exit the Digital Compass Mode

1. While in the Timekeeping, Barometer/Thermometer, or Altimeter Mode,

press B to enter the Digital Compass Mode.

• At this time, the watch immediately starts a Digital Compass operation.

After about two seconds, letters appear on the display to indicate the

direction that the 12 o'clock position of the watch is pointing.

2. Press D to return to the Timekeeping Mode.

To take a direction reading

1. Enter the Digital Compass Mode.

Magnetic north pointer

2. Place the watch on a flat surface or (if you

12 o'clock position

are wearing the watch), make sure that

Direction

your wrist is horizontal (in relation to the

horizon).

3. Point the 12 o'clock position of the watch in

the direction you want to measure.

4. Press B to start a Digital Compass

measurement operation.

• After about two seconds, the direction

Timekeeping Mode time

• Also, four pointers appear to indicate

Direction value (in degrees)

• After the first reading is obtained, the

0°

• The COMP indicator flashes on the

• The direction value that appears on the

Note

• Note that taking a measurement while the watch is not horizontal (in

relation to the horizon) can result in large measurement error.

• Pressing B while in the Digital Compass Mode starts a new direction

measurement operation.

• The following table shows the meanings of each of the direction

abbreviations that appear on the display.

Direction Meaning

Direction

Meaning

North-

NNE

North

northeast

East-

ESE

East

southeast

South-

SSW

South

southwest

West-

WNW

West

northwest

• You can adjust the rotary direction bezel so

Direction bezel

that the "N" is aligned with the magnetic

north pointer. This correctly aligns all of the

markings on the bezel.

• The Digital Compass operation is

automatically interrupted whenever an

alarm (Daily Alarm or Hourly Time Signal)

sounds. If this happens, start the Digital

Compass operation again from the

beginning.

• See "Digital Compass Precautions" for other

important information about taking direction

readings.

BAROMETER/THERMOMETER

This watch uses a pressure sensor to measure air pressure (barometric

pressure) and a temperature sensor to measure a temperature.

• You can calibrate the temperature sensor and the pressure sensor if you

suspect that readings are incorrect.

that the 12 o'clock position of the watch

is pointing appears on the display.

magnetic north, south, east, and west.

watch continues to take direction

readings automatically each second, for

up to 30 seconds.

display while a measurement is in

progress.

display represents the clockwise angle

formed between magnetic north (which

is 0 degrees) and the displayed

direction.

Direction

Meaning

Direction

Meaning

East-

ENE

Northeast

northeast

South-

SSE

Southeast

southeast

West-

WSW

Southwest

southwest

North-

NNW

Northwest

northwest

Understanding the Barometer/Thermometer Screen

Press C to enter the Barometer/Thermometer

Barometric pressure graph

Mode.

(unit: 1hPa (mb)/0.05 inHg)

• Barometric pressure is displayed in units of

1hPa/mb (or 0.05inHg).

• Temperature is displayed in units of 0.1°C

(or 0.2°F).

• The displayed barometric pressure value

changes to

measured barometric pressure falls outside

the range of 260 hPa/mb to 1100 hPa/mb

(7.65 inHg to 32.45 inHg). The barometric

pressure value will be displayed again as

Temperature

soon as the measured barometric pressure

Barometric pressure

is within the allowable range.

• The displayed temperature value changes to

measured temperature falls outside the range of –10.0°C to 60.0°C (14.0°F

to 140.0°F). The temperature value will be displayed again as soon as the

measured temperature is within the allowable range.

• Some countries refer to the barometric pressure unit hecto-pascal (hPa) as

millibars (mb). It really makes no difference, because 1hPa = 1mb. In this

manual, we use hPa/mb or hPa (mb).

Barometric Pressure Graph

Barometric pressure indicates changes in the atmosphere. By monitoring

these changes you can predict the weather with reasonable accuracy. 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 newest

measurement. Note that pressure graph readings are relative to the newest

measurement point. One dot above the newest point is plus 1hPa(mb)/

0.05inHg, while one dot below is minus 1hPa(mb)/0.05inHg. The following

shows how to interpret the data that appears on the barometric pressure

graph.

A rising graph generally means improving 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 (260 hPa/mb to 1100 hPa/mb or

7.65 inHg to 32.45 inHg)

• Sensor malfunction

• Dead batteries

About Barometric and Temperature Measurements

• Barometric pressure and temperature measurement operations are

performed as soon as you enter the Barometer/Thermometer Mode. After

that, temperature measurements are taken every five seconds for the first

three minutes, and then taken every five minutes thereafter.

• The BARO indicator flashes on the display while a measurement is in

progress.

• The barometer automatically takes measurements every two hours

(starting from midnight), regardless of what mode you are in. The results of

these measurements are used for the barometric pressure graph.

• You can also perform a barometric pressure and temperature

measurement at any time by pressing C in the Barometer/Thermometer

Mode.

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 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.

• You can change the measured barometric pressure unit between hecto-

pascals/millibars (hPa/mb) and inchesHg (inHg). See "Changing the

Barometric Pressure and Temperature Units" for details.

• You can change the measured temperature value displayed by this watch

between Celsius (°C) and Fahrenheit (°F). See "Changing the Barometric

Pressure and Temperature Units".

2271-2

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hPa/mb (or inHg) if a

°C (or °F) if a

Not visible on

the display.