Casio 1244 Посібник з експлуатації - Сторінка 4

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To test the alarm

Hold down © while in the Alarm Mode to sound the alarm.

About the alarm sounds

This watch has three types of alarms: Prayer Time Alarm, Daily Alarm, and Hourly

Time Signal. Each alarm has a different type of sound so you can tell them apart. Note

that the alarms have the following priority sequence whenever they are set to sound at

the same time.

. Prayer Time Alarm

2. Daily Alarm

3. Hourly Time Signal

• This means that if the Daily Alarm and Prayer Time Alarm are set to sound at the

same time, only the Prayer Time Alarm sounds.

PART 7 DIGITAL COMPASS MODE

In the Digital Compass Mode, the watch points to one

Mode

of 16 directions selected by you.

Current Hijra indicator

7-1 To use the digital compass

. While in the Digital Compass Mode, use (B) to

display the indicator that specifies the direction you

want to point to.

Direction indicator

Current time

Indicator Direction Indicator Direction Indicator Direction Indicator Direction

North-

NORTH

NNE

North

northeast

East-

EAST

East

ESE

southeast

South-

SOUTH

South

SSW

southwest

West-

West

WEST

WNW

northwest

. Place the watch on a flat surface or (if you wearing the watch), make sure that your

wrist horizontal (in relation to the horizon).

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

horizon) can result in large measurement error.

Arrow

. Press (D) to start the compass operation.

• After a few seconds the arrow on the display points in

the direction you selected in step 1. This arrow

remains on the display for about two minutes

• You can repeat steps

you like.

Direction indicator

(Northeast)

7-2 Digital Compass Precautions

The following describes precautions you should observe when performing a digital

compass operation. Note that the term digital compass operation in this manual refers

to Digital Compass Mode operations and to the Qibla operation.

This watch features a built-in magnetic bearing sensor that detects terrestrial

magnetism. This means that the northern direction 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. The

difference between true north and magnetic north is expressed in degrees, and it is

called the directional variance. The map that is included separately with this watch

shows the directional variance for points around the globe.

Note that the directional variance as measured with 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 allowance when using such maps with this watch.

Location

• Using a digital compass operation when you are near a source of

strong magnetism can cause large errors in readings. Because of

this you should avoid using a digital compass operation 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 measurements are impossible while in a train, boat, air plane, etc.

• Accurate measurements are also impossible indoors, especially inside ferroconcrete

structures. This is because the metal framework of such structures picks up

magnetism from appliances, etc.

Storage

• The precision of the digital compass 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 either

one of two calibration procedures: bidirectional calibration or northerly calibration

(see "7-4 Calibrating the magnetic sensor").

East-

Northeast

ENE

northeast

South-

Southeast

SSE

southeast

West-

Southwest

WSW

southwest

North-

Northwest

NNW

northwest

through 3 as many times as

7-3 Warning Indicators

Warning indicators (message) appear whenever any of the conditions described below

occurs.

Abnormal Magnetic Field Indicator

This indicator appears on the display whenever the digital

HIJRA

compass has a problem obtaining a correct reading. This

condition could indicate that the watch is within a very high

magnetic field, and so you should try moving to another

location. Also see "7-2 Digital Compass Precautions" for

further information on conditions that cause errors.

Low Battery Indicator

This message indicates battery power is too low to perform a

digital compass operation. It appears whenever battery

HIJRA

TH 21 BATT

power drops below a certain level, or when you try to perform

a digital compass operation under cold conditions.

If the BATT message appears because of use under cold conditions, it should clear

(and normal operation should return) after the watch is brought back to normal

temperature.

If battery power is low (indicated when BATT appears under normal temperatures), you

should have the battery replaced as soon as possible.

7-4 Calibrating the magnetic sensor

Whenever you suspect that the readings produced by a digital compass operation are

wrong, you should calibrate it. You can use either one of two calibration

procedures: bidirectional calibration or northerly calibration.

You should use bidirectional calibration when you want to calibrate the digital compass

to operate within an area exposed to magnetic force. This type of calibration should be

employed if the watch becomes magnetized for any reason.

With northerly calibration, you "teach" the watch which way is magnetic north (which

you have to determine with another compass or some other means).

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.

• If you do not perform any button operation for two or three minutes while either

calibration procedure is in progress (while the calibration direction indicator is

flashing at the 12 or 6 o'clock position), the watch automatically returns to the Digital

Compass Mode.

• The more correctly you perform bidirectional calibration, the better the accuracy of

your digital compass readouts. You should perform bidirectional calibration whenever

you change environments where you perform digital compass operations and

whenever you feel that digital compass operations are producing incorrect readings.

To perform bidirectional calibration

. While in the Digital Compass Mode, press (A) to start the

Calibration direction

bidirectional calibration procedure.

indicator

• At this time, the display changes to show

calibration direction indicator flashes at the

position to indicate that the watch is ready to calibrate the

first direction.

calibrate the first direction.

• When the calibration procedure is complete, the message

"OK" appears in the display. This shortly changes to

and the calibration direction indicator flashes at the

o'clock position to indicate that the watch is ready for

the second direction.

3. Rotate the watch 180 degrees.

• When the calibration procedure is complete, the message "OK" appears in the display.

After a short while, the watch automatically returns to the Digital Compass Mode.

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 readings from digital

compass operations.

• Do not move the watch during one to two seconds (from the point you press (D), up to

the point that "OK" appears on the display) that the calibration of each direction is in

progress. If you do, the Abnormal Magnetic Field Indicator "ERROR" appears on the

display. When this happens, restart the bidirectional calibration procedure from the

beginning.

• The appearance of "ERROR" during bidirectional calibration can also be caused by

local interference. Move to another location and try the bidirectional calibration

procedure again.

• You should perform bidirectional calibration in an environment that is the same as that

where you plan to be performing digital compass operations, if you plan to use it in an

open field, for example, calibrate in an open field.

To perform northerly calibration

1. While in the Digital Compass Mode, press (A) to start the bidirectional calibration

procedure.

• At this time, the indicator "NORTH" appears on the display.

3. Place the watch on a level surface, and position it so that

its

o'clock position points magnetic north (as

measured with another compass).

4. Press (D) to start the calibration operation.

• When the calibration procedure is complete, the message

"OK" appears on the display. After a short while, the

watch automatically returns to the Digital Compass Mode.

1044 1244-4

and the

o'clock