Manual Casio 5442 - GN-1000 (page 5 of 10) (English)

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E-32

Digital Compass Precautions

Magnetic North and True North

The northerly direction can be expressed either as magnetic north or true

north, which are different from each other. Also, it is important to keep in mind

that magnetic north moves over time.

• Magnetic north is the north that is indicated by the needle of a compass.

• True north, which is the location of the North Pole of the Earth’s axis, is the

north that is normally indicated on maps.

• The difference between magnetic north and true north is called the

“declination”. The closer you get to the North Pole, the greater the

declination angle.

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 readings are also impossible indoors, especially inside ferroconcrete structures. This is

because the metal framework of such structures picks up magnetism from appliances, etc.

• Accurate direction readings are impossible while in a train, boat, air plane, etc.

True north

Earth

Magnetic north

True north

Earth

Magnetic north

E-33

Storage

• The precision of the bearing sensor may deteriorate if the watch becomes magnetized. Because of

this, you should store the watch away from magnets or any other sources of strong magnetism,

including: permanent magnets (magnetic necklaces, etc.), concentrations of metal (metal doors,

lockers, etc.), and household appliances (TVs, personal computers, washing machines, freezers, etc.)

• Whenever you suspect that the watch may have become magnetized, perform the procedure under “To

perform bidirectional calibration” (page E-26).

E-34

Taking Temperature Readings

This watch uses a temperature sensor to measure temperature.

To take temperature readings

While in the Timekeeping Mode, press

•

TEMP

will appear on the display and temperature measurement will

start. After about one second, the measurement reading will appear on

the display.

• The watch will continue to take temperature readings every ﬁ ve

seconds for about two minutes.

• The watch will return to the Timekeeping Mode after the reading

operation is complete (about two minutes).

• Pressing

while a temperature reading operation is in progress will

restart a two-minute temperature reading operation.

• Pressing

while a reading operation is in progress will stop the

operation and enter the Timekeeping Mode.

Temperature

• Temperature is displayed in units of 0.1°C (or 0.2°F).

• The displayed temperature value changes to

- - .-

°C (or °F) if a 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 reappear as soon as the

measured temperature is within the allowable range.

TemperatureTemperature

E-35

Display Units

You can select either Celsius (°C) or Fahrenheit (°F) for the displayed temperature value. See “To specify

the temperature unit” (page E-37).

Temperature Sensor Calibration

The temperature sensor built into the watch is calibrated at the factory and normally requires no further

adjustment. 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.

E-36

To calibrate the temperature sensor

1. Take a reading with another measurement device to determine the exact current temperature.

2. With the watch in the Timekeeping Mode, press

to enter the Thermometer Mode.

3. Hold down

for about two seconds until the temperature reading disappears from the display.

Release

at this time, which will cause the temperature reading to ﬂ ash, which indicates the setting

mode.

4. Use

(+) and

(−) to calibrate the temperature value with the

reading of another instrument.

• Each press of a button changes the temperature value in units of

0.1°C (0.2°F).

• To return the temperature to its uncalibrated value (OFF setting),

press

and

at the same time.

• Holding down

scrolls the setting at high speed.

5. Press

to complete calibration and restart the temperature reading

operation.

Thermometer Precautions

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.

E-37

Specifying Temperature Unit

Use the procedure below to specify the temperature unit to be used in the Thermometer Mode.

Important!

When

TOKYO

is selected as the Home City, the temperature unit is set automatically to Celsius (

°C

). This

setting cannot be changed.

To specify the temperature unit

1. In the Timekeeping Mode, press

to enter the Thermometer Mode.

2. Hold down

for about two seconds until the temperature reading starts to ﬂ ash.

3. Press

to display the current temperature unit.

4. Press

to toggle the temperature unit between

°C

(Celsius) and

°F

(Fahrenheit).

5. After the setting is the way you want, press

to exit the setting

screen.

E-38

Checking the Tide Level, Moon Phase, and Moon Age (Tide/Moon)

You can use the watch to check the current tide level, Moon phase, and Moon age.

• The above information is displayed for the currently selected Home Time City. You can also check

information for another city by changing to a different Home City (page E-15).

• Note that the tide and Moon information displayed by this watch is approximate and is intended as

general information only. Never try to use it for marine navigation or any other purposes requiring

accurate measurements.

Viewing the Current Tide Level, Moon Phase, and Moon Age

To view the current tide level

Dial Hand 2 (at 6 o’clock) shows the current tide level in all modes except for the Digital Compass Mode

and Tide/Moon Data Mode.

Tide level (Tide Graph Hand)Tide level (Tide Graph Hand)

E-39

Low tideHigh tide

• The tide level in the Home City is indicated even while the watch is in the World Time Mode.

• If the Tide Graph hand indication is not correct, check the Timekeeping Mode time and date, and the

Home City settings. If this does not correct the problem, refer to “Calibrating the High Tide Time” (page

E-46).

To view the current moon phase

Moon Graph shows the current Moon phase in all modes except for the Tide/Moon Data Mode and the

setting mode (when a setting is ﬂ ashing on the display).

•

Regardless of the watch module (page E-2), the white part of the Moon

Graph shows the currently visible (lit) part of the Moon.

Moon phase

(white part)

Module 5442 Module 5443

Moon phase (Moon Graph):Moon phase (Moon Graph):

Operation Guide 5442 5443

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Casio 5442 - GN-1000 Manual

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