Casio 3070(B) Digital Compass Precautions, OFF, Note, E, W), Storage, Location, Important, To take a direction reading, Calibrating the Bearing Sensor

Operation Guide 3070 (B)

To enter and exit the Digital Compass Mode

12 o’clock position		1. While in the Timekeeping Mode or in any of
		the other sensor modes, press C to enter the
		Digital Compass Mode.
		• At this time, the watch will start 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.
		• The direction reading on the display is
	Current time	updated each second for up to 20 seconds,
		after which measurement stops
		automatically.
		2. Press D to return to the Timekeeping Mode.

To take a direction reading

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

North pointer

12 o’clock position

Direction indicator

Angle value (in degrees)

270°			NW NW NN		W	0°
			W
		W				N
		W				N
	S					N
W						E
SW								NE
W						E	N	E
S
	S
		S				E
180°			SSE SE	ESE		90°

1.While the watch is in the Digital Compass Mode, place it on a flat surface, or if you are wearing the watch, make sure that your wrist is horizontal (in relation to the horizon).

2.Point the 12 o’clock position of the watch in the direction you want to measure.

3.Press C to start a Digital Compass

measurement operation.

•After about two seconds, the direction that the 12 o’clock position of the watch is pointing appears on the display.

•Also, four pointers appear to indicate magnetic north, south, east, and west.

•After the first reading is obtained, the watch continues to take direction readings automatically each second, for up to 20 seconds.

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”.

Calibrating the Bearing Sensor

You should calibrate the bearing sensor whenever you feel that the direction readings being produced by the watch are off. There are three different calibration methods available: magnetic declination correction, bidirectional calibration, and northerly calibration.

• Magnetic Declination Correction

With magnetic declination correction, you input a magnetic declination

angle (difference between magnetic north and true north), which allows the

watch to indicate true north.

You can perform this procedure when the magnetic declination angle is

indicated on the map you are using.

Note that you can input the declination angle in degree units only, so you

•While the watch is taking compass readings, it displays a direction angle, a direction indicator, and four direction pointers, which change dynamically when the watch is moved. The direction angle, direction indicator and direction pointers all disappear from the display after the compass reading operation is complete.

Note

• Note that taking a measurement while the watch is not horizontal (in relation to the horizon) can result in large measurement error.

•The margin of error for the angle value and the direction indicator is ±11 degrees. If the indicated direction is northwest (NW) and 315 degrees, for example, the actual direction can be anywhere from 304 to 326 degrees.

•Any ongoing direction measurement operation is paused temporarily while the watch is performing an alert operation (daily alarm, Hourly Time Signal, countdown timer alarm) or while illumination is turned on (by pressing L). The measurement operation resumes for its remaining duration after the operation that caused it to pause is finished.

•The following table shows the meanings of each of the direction abbreviations that appear on the display.

Direction	Meaning	Direction	Meaning	Direction	Meaning	Direction	Meaning
N	North	NNE	North-	NE	Northeast	ENE	East-
			northeast				northeast
E	East	ESE	East-	SE	Southeast	SSE	South-
			southeast				southeast
S	South	SSW	South-	SW	Southwest	WSW	West-
			southwest				southwest
W	West	WNW	West-	NW	Northwest	NNW	North-
			northwest				northwest

•See “Digital Compass Precautions” for other important information about taking direction readings.

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.

may need to round off the value specified on the map. If your map indicates

the declination angle as 7.4°, you should input 7°. In the case of 7.6° input

8°, for 7.5° you can input 7° or 8°.

• Bidirectional Calibration and Northerly Calibration

Bidirectional calibration and northerly calibration calibrate the accuracy of

the direction sensor in relation to magnetic north.

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 becomes 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).

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 existing 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 magnetic declination correction

Magnetic declination				1.	In the Digital Compass Mode, hold down E
angle direction					for about two seconds until the magnetic
					declination angle value starts to flash. This is
					the setting screen.
	ll l	l ll		2.	Use A (+) and C (–) to change the magnetic
					declination angle value.
l			l	3.	Press D to move the flashing to the magnetic
l			l
l
	l l l	l	l		declination correction direction setting (OFF,
					E, W).
					• This will cause the magnetic declination
			Magnetic		angle direction setting to flash.
			declination 4.		Use A to cycle the direction setting between
			angle value		the following options.

•OFF: No magnetic declination correction

•E: When magnetic north is to the east (east declination)

•W: When magnetic north is to the west (west declination)

•The illustration above, for example, shows the value you should input

and the direction setting you should select when the map shows a magnetic declination of 1° West.

5.When the setting is the way you want, press E to exit the setting screen.

• Selecting OFF for the magnetic declination angle direction causes the watch’s magnetic declination angle value to change to xx.

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