Casio PRG-40 User Manual

Module No. 2271

2271-1

GETTING ACQUAINTED

Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to carefully read this manual and keep it on hand for later reference when necessary.

Applications

The built-in sensors of this watch measure direction, altitude, barometric pressure, and temperature. Measured values are then shown on the display. Such features make this watch useful when hiking, mountain climbing, or when engaging in other such outdoor activities.

• The measurement functions built into this watch are not intended for taking measurements that require professional or industrial precision. Values produced by this watch should be considered as reasonable representations only.

• When engaging in mountain climbing or other activities in which losing your way can create a dangerous or life-threatening situation, always be sure to use a second compass to confirm direction readings.

• CASIO COMPUTER CO., LTD. assumes no responsibility for any loss, or any claims by third parties that may arise through the use of this watch.

Warning!

GENERAL GUIDE

• If the digital display of your watch is continuously changing, see “Auto Display Function” for information on how to stop it.

• The illustration below shows which buttons you need to press to navigate between modes.

Recall Mode

Press D.

▲

Alarm Mode

Timekeeping Mode

▲

About This Manual

• Button operations are indicated using the letters shown in the illustration.

• Each section of this manual provides you with the information you need to perform operations in each mode. Further details and technical information can be found in the “REFERENCE” section.

(Light)

• In any mode, hold down D for about one second to return to the

Timekeeping Mode.

• You can use buttons B, C, and E to directly enter a sensor mode from

the Timekeeping Mode or from another sensor mode. To get to a sensor mode from the Recall, Alarm, or Stopwatch Mode, you must go to the Timekeeping Mode first.

Sensor Modes

Digital Compass Mode

Press B.

▲

Barometer/

Thermometer Mode

▲

PM indicator

Day of week

Year

Hour : Minutes

▲

Stopwatch Mode

TIMEKEEPING

Seconds

Month – Day

▲

To set the time and date

Use the Timekeeping Mode to set and view the current time and date.

To reset the seconds count to zero

1. In the Timekeeping Mode, hold down A

until the second digits start to flash, which indicates the setting screen.

2. Press E to reset the seconds count to

• Pressing E while the seconds count is

in the range of 30 to 59 resets the seconds to minutes. In the range of 00 to 29, the minutes count is unchanged.

3. Press A to exit the setting screen.

00 and adds 1 to the

00.

3. While a setting is flashing, use E (+) and B (–) to change it.

• When the 12/24-hour setting is selected, press E or B to toggle

4. Press A to exit the setting screen.

▲

Seconds

Day

between 12-hour (

Altimeter Mode

1. In the Timekeeping Mode, hold down A

until the second digits start to flash, which indicates the setting screen.

2. Press D to move the flashing in the

sequence shown below to select other settings.

Hour

Month Year

12H) and 24-hour (24H) timekeeping.

Minutes

12/24-Hour Format

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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

Magnetic north pointer

12 o’clock position

Direction

Timekeeping Mode time

Direction value (in degrees)

WSW

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

NNE

North

ESE

East

SSW

South

West

WNW

Direction bezel

1. Enter the Digital Compass Mode.

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

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 30 seconds.

• The COMP indicator flashes on the

display while a measurement is in progress.

• The direction value that appears on the

display represents the clockwise angle formed between magnetic north (which is 0 degrees) and the displayed direction.

Meaning

northeast

southeast

southwest

northwest

Direction

North-

East-

South-

West-

• You can adjust the rotary direction bezel so

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.

Meaning

Northeast

Southeast

Southwest

Northwest

ESE

0°

Direction

ENE

SSE

WSW

NNW

Meaning

East-

northeast

South-

southeast

West-

southwest

North-

northwest

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.

Understanding the Barometer/Thermometer Screen

Barometric pressure graph (unit: 1hPa (mb)/0.05 inHg)

Barometric pressure

• The displayed temperature value changes to

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

Temperature

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.

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.

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

Press C to enter the Barometer/Thermometer Mode.

• 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 soon as the measured barometric pressure is within the allowable range.

xxxx hPa/mb (or inHg) if a

xx. x °C (or °F) if a

A rising graph generally means improving weather.

A falling graph generally means deteriorating weather.

Not visible on the display.

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 hectopascals/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”.

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ALTIMETER

A built-in altimeter uses a pressure sensor to detect the current air pressure, which is then used to estimate the current altitude. The watch is preprogrammed with ISA (International Standard Atmosphere) preset values, which are used to convert air pressure readings to altitude values. If you preset a reference altitude, the watch will also calculate the current relative altitude based on your preset value. Altimeter functions also include data storage memory and an altitude alarm.

Important!

• This watch estimates altitude based on air pressure. This means that altitude readings for the same location may vary if air pressure changes.

• This watch employs a semiconductor pressure sensor, which is affected by temperature changes. When taking altitude measurements, be sure to do so while ensuring that the watch is not exposed to temperature changes.

• Do not rely upon this watch for altitude measurements or perform button operations while engaging in sports where there are sudden altitude changes, while sky diving, hang gliding, or paragliding, or while riding a gyrocopter, glider, or any other aircraft.

• Do not use this watch for measuring altitude in applications that demand professional or industrial level precision.

How the Altimeter Works

With the Preset Values (No Reference Altitude)

• The watch measures the air pressure at your current location and uses the built-in ISA values to convert it to the equivalent altitude.

With a Reference Altitude

• After you set the reference altitude, the watch adjusts its air pressure to altitude conversion calculation accordingly.

• To determine the height of a tall building, set the reference altitude to 0 on the ground floor. Note, however, that you may not be able to get a good reading if the building is pressurized or air-conditioned.

• When mountain climbing, you can set the reference value in accordance with a marker along the way or altitude information from a map. After you do this, the altitude readings produced by the watch will be more accurate than they would without a reference altitude.

• Note that the following conditions will prevent you from obtaining accurate readings:

When air pressure changes because of changes in the weather Extreme temperature changes When the watch itself is subjected to strong impact

400

Understanding the Altimeter Screen

Press E to enter the Altimeter Mode.

• Altitude is displayed in units of 5 meters (20 feet).

• The measurement range for altitude is –700 to 10,000 meters (–2,300 to

32,800 feet).

• The measured altitude may be a negative value in cases where there is a reference altitude value set or because of certain atmospheric conditions.

• The displayed altitude value changes to measured altitude falls outside the measurement range. The altitude value will be displayed again as soon as the measured altitude is within the allowable range.

• You can change the unit of measurement for the displayed altitude values between meters (m) and feet (ft). See “To change the Altitude Units”.

Altitude graph (current altitude flashing) (unit: 10m/40 ft.)

1 second later

Remaining memory

▲

Timekeeping Mode time

xxxx meters (or feet) if a

About Altitude Measurements

There are two types of altitude measurements: those for displayed data (Altimeter Mode measurements) and those for memory data (Memory measurements).

Altimeter Mode measurement

This type of measurement is performed only when the watch is in the Altimeter Mode. As soon as you enter the Altimeter Mode, measurements are taken every five seconds for the first three minutes. After that, measurements are taken every two minutes.

• The ALTI indicator flashes on the display while a measurement is in progress.

Altitude

Memory measurements

Memory measurements are taken independently of Altimeter Mode measurements and stored directly into memory (along with the date and time of the measurement) for later recall. There are two types of memory measurements: “Auto measurements” and “Manual measurements”.

Auto measurements

With Auto measurement, the watch continuously performs measurements whenever the minutes in the Timekeeping Mode reach 00, 15, 30, or 45, until you switch Auto measurements off. The watch continues to take measurements regardless of whether or not you change modes, so you can keep a running log of altitude changes automatically.

Manual measurements

You can use the manual procedure to take a reading anytime you want to store your current altitude data into memory for later recall. Manual memory measurements can be performed only while the watch is in the Altimeter Mode.

Selecting Auto or Manual Measurement

Use the following procedure to switch between Auto or Manual measurement. Note that you cannot perform this operation while a preset Auto measurement is already in progress.

To select Auto or Manual measurement

1. In the Altimeter Mode, hold down A until

the display clears. After four or five seconds, either reference altitude value (if set) will start to flash, which indicates the setting screen.

2. Press D twice to move the flashing to the

memory measurement setting (AUTO or MANUAL).

• Press D to move the flashing in the sequence shown below.

Reference

Altitude

3. While the memory measurement setting is flashing, press B or E to

select AUTO (Auto measurement) or MANUAL (Manual measurement).

4. Press A to exit the setting screen.

• An indicator on the display shows the type of measurement (AUTO or MANUAL) that you currently have selected.

Altitude

Alarm

OFF or the current

Memory

Measurement

Altitude

Unit

To use Auto measurement

1. Confirm that the AUTO indicator is shown on the display.

• If it is not, use the procedure under “To select Auto or Manual measurement” to select Auto measurement.

2. In the Altimeter Mode, hold down E until the watch emits a short beep,

indicating the start of the measurement.

3. To stop measurements at any point in the Altimeter Mode, hold down E

again until the watch emits a short beep.

• The data that is measured when you first start Auto measurement is also stored into memory.

• The AUTO indicator flashes on the display when you start Auto measurements. The AUTO indicator continues to flash (indicating that measurements continue) even if you change modes.

• Auto measurement cuts off automatically whenever there are 49 records stored in memory. The 50th record measurement when you stop measurement in step 3 above is also stored in memory.

• A final measurement is taken when you turn off Auto measurement, and that data is also stored into memory. Such data is indicated by

FIN during the recall operation.

To use Manual measurement

1. Confirm that the MANUAL indicator is shown on the display.

• If it is not, use the procedure under “To select Auto or Manual measurement” to select Manual measurement.

2. In the Altimeter Mode, hold down E until the watch emits a short beep,

indicating that a measurement is taken.

• Repeat step 2 whenever you want to take a reading.

• Button operation becomes impossible during the four or five seconds

that it takes to complete a measurement. Normal operation will return once the operation is finished.

Setting a Reference Altitude

After you set a reference altitude, the watch adjusts its air-pressure-to-altitude conversion calculation accordingly. The altitude measurements produced by this watch are subject to error caused by changes in air pressure. Because of this, we recommend that you update the reference altitude whenever one is available during your climb.

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