Casio 3172 Barometer/Thermometer, Using the Digital Compass While Mountain Climbing or Hiking, -N, Note, BARO, Screen, Storage, SET Hold, SET Hold, Location, Important

Operation Guide 3172

To perform northerly calibration

To determine the direction angle to an objective on a map and head in that direction

Important!

If you want to perform both northerly and bidirectional calibration, perform bidirectional calibration ﬁrst, and then perform northerly calibration. This is necessary because bidirectional calibration cancels any existing northerly calibration setting.

l	l l		1. In the Digital Compass Mode, hold down E until the current magnetic
l		l	declination settings start to ﬂash on the display. This is the setting
l		l
l		l	screen.
l		l	screen.
l		l
l		l	• Before the magnetic declination settings start to ﬂash, the
l		l
l	l
	l		message SET Hold will appear on the display. Keep E depressed

until SET Hold disappears and the magnetic declination settings start to ﬂash.

2. Press D twice to display the northerly calibration screen.

• At this time, -N-(north) appears on the display.

3. Place the watch on a level surface, and position it so that its 12 o’clock position points north (as measured with another compass).

4. Press C to start the calibration operation.

• - - - is shown on the display while calibration is being performed. When calibration is successful, the display will show OK and then change to the Digital Compass Mode (- - -).

Objective

Current location

N	12 o’clock
	position

12 o’clock	Bearing
position	memory

1. Set the map so its northerly indication is aligned with north as indicated

by the watch, and determine your current location.

• See “To set a map and ﬁnd your current location” for information

about how to perform the above step.

2. As shown in the illustration to the left, change your position so you (and

the 12 o’clock position of the watch) are pointed in the direction of

objective, while keeping the northerly direction indicated on the map

aligned with north as indicated by the watch.

• If you ﬁnd it difﬁcult to perform the above step while keeping

everything aligned, ﬁrst move into the correct position (12 o’clock

position of the watch pointed at the objective) without worrying

about the orientation of the map. Next, perform step 1 again to set

the map.

3. While in the Timekeeping Mode or in any of the sensor modes, press

C to take a compass reading.

Bearing Memory

12 o’clock Bearing memory

position direction angle

	North
	pointer
	Bearing
Direction angle of	memory
current reading	pointer

Bearing Memory

Screen

Bearing Memory lets you store a direction reading and display that reading as you take subsequent digital compass measurements. The Bearing Memory screen displays the direction angle for the stored direction, along with an indicator on the display that also indicates the stored direction.

When you take digital compass measurements while the Bearing Memory screen is on the display, the direction angle of the current digital compass measurement (as read from the 12 o’clock position of the watch) and the currently stored Bearing Memory direction information will both be displayed.

To store a direction angle reading in Bearing Memory

1.Press C to start a digital compass measurement operation.

•If a bearing memory direction angle value is already displayed,

it means that the bearing memory screen is displayed. If this happens, press E to clear the value currently in Bearing Memory and exit the bearing memory screen.

North	pointer
pointer

Direction angle of current reading

Bearing memory direction angle value

4. While direction angle readings are in progress, press E to record the

currently displayed direction in Bearing Memory.

• The direction angle value and pointer stored in Bearing Memory

will remain on the display for about 20 seconds.

• See “Bearing Memory” for more information.

5. Now you can advance while monitoring the Bearing Memory pointer to

ensure that it remains in the 12 o’clock position.

• To re-display the Bearing Memory direction angle value and

Bearing Memory pointer, press C.

• Pressing E while the Bearing Memory direction angle value and

Bearing Memory pointer are on the display will clear the Bearing

Memory data you saved in step 3 and save the current direction

reading in Bearing Memory.

Note

• When mountain climbing or hiking, conditions or geographic

contours may make it impossible for you to advance in a straight

line. If this happens, return to step 1 and save a new direction to

2. During the 20 seconds that digital compass measurement is in progress, press E to store the current

direction angle reading in Bearing Memory.

• The Bearing Memory direction angle ﬂashes for about one second as it is stored in Bearing

Digital Compass Precautions

the objective.

Memory. After that, the Bearing Memory screen (which shows the bearing memory direction

angle) will appear, and a 20-second direction reading operation will start.

• While the Bearing Memory screen is displayed, you can press C to start a new 20-second

direction reading operation, which displays the direction angle for the direction that the 12 o’clock

position of the watch is pointed. The direction angle of the current readings will disappear from the

display after the direction reading operation is complete.

• During the ﬁrst 20 seconds after you display the Bearing Memory screen or during the 20-second

direction reading operation while the Bearing Memory screen is on the display, the direction

stored in memory is indicated by a Bearing Memory pointer.

• Pressing E while the Bearing Memory screen is displayed will clear the direction angle currently

in Bearing Memory and start a 20-second direction reading operation.

Using the Digital Compass While Mountain Climbing or Hiking

This section provides three practical applications for using the watch’s built-in digital compass.

•Setting a map and ﬁnding your current location

Having an idea of your current location is important when mountain climbing or hiking. To do this, you need to “set the map”, which means to align the map so the directions indicated on it are aligned with the actual directions of your location. Basically what you are doing is aligning north on the map with north as indicated by the watch.

•Finding the bearing to an objective

•Determining the direction angle to an objective on a map and heading in that direction

To set a map and ﬁnd your current location

1.With the watch on your wrist, position it so the face is horizontal.

2.While in the Timekeeping Mode or in any of the sensor modes, press C to take a compass reading.

• The reading will appear on the display after about two seconds.

North indicated	3. Rotate the map without moving the watch so the northerly direction
	indicated on the map matches north as indicated by the watch.
on the map	• If the watch is conﬁgured to indicate magnetic north, align the

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.

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 ferroconcrete 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 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 the procedure under “To perform bidirectional calibration”.

Barometer/Thermometer

This watch uses a pressure sensor to measure air pressure (barometric pressure) and a temperature sensor to measure temperature.

map’s magnetic north with the watch indication. If the watch has

been conﬁgured with a declination to correct to true north, align

the map’s true north with the watch indication. For details, see

“Calibrating the Bearing Sensor”.

•This will position the map in accordance with your current location.

	Current	4. Determine your location as you check the geographic contours around
N	location	you.

Barometric

pressure graph Temperature

Barometric	Pressure differential
pressure	pointer

To enter and exit the Barometer/Thermometer Mode

1.While in the Timekeeping Mode or in any of the sensor modes, press B to enter the Barometer/Thermometer Mode.

•BARO will appear on the display, indicating that barometric pressure and temperature measurements are in progress. The measurement results will appear on the display after about ﬁve seconds.

•After you press B, the watch will take readings every ﬁve seconds for the ﬁrst ﬁve minutes, and then every two minutes after that.

2.Press D to return to the Timekeeping Mode.

•The watch will return to the Timekeeping Mode automatically if you do not perform any operation for about one hour after entering the Barometer/Thermometer Mode.

North indicated by north pointer

To ﬁnd the bearing to an objective

To take barometric pressure and temperature readings

While in the Timekeeping Mode or in any of the sensor modes, press B.

• This starts barometric pressure and temperature measurements automatically.

• You also can perform a barometric pressure and temperature measurement at any time by pressing B

in the Barometer/Thermometer Mode.

1. Set the map so its northerly indication is aligned with north as indicated

by the watch, and determine your current location.

• It can take up to four or ﬁve seconds for the barometric pressure reading to appear after you enter the

Barometer/Thermometer Mode .

Objective

Current location

12o’clock

position

	• See “To set a map and ﬁnd your current location” for information
	about how to perform the above step.
2.	Set the map so the direction you want to travel on the map is pointed
	straight in front of you.
3.	With the watch on your wrist, position it so the face is horizontal.
4.	While in the Timekeeping Mode or in any of the sensor modes, press
	C to take a compass reading.
	• The reading will appear on the display after about two seconds.
5.	Still holding the map in front of you, turn your body until north as
	indicated by the watch and the northerly direction on the map are
	aligned.
	• This will position the map in accordance with your current location,
	so the bearing to your objective is straight ahead of you.

Temperature

Barometric pressure

Barometric Pressure

•Barometric pressure is displayed in units of 1 hPa (or 0.05 inHg).

•The displayed barometric pressure value changes to - - - if a measured barometric pressure falls outside the range of 260 hPa to 1,100 hPa (7.65 inHg to 32.45 inHg). The barometric pressure value will reappear as soon as the measured barometric pressure is within the allowable range.

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.