CASIO PRG50-1V - Owner's Manual Immediate Download

USER'S GUIDE 2471

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.

Expose the watch to bright light to charge its battery before using it.

You can use this watch even as its battery is being charged by exposure to

bright light.

····· Be sure to read "Battery" of this manual for important information

you need to know when exposing the watch to bright light.

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.

Warning!

· 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.

If the display of the watch is blank...

If the SLEEP indicator is on the display (either

flashing or steady), it means that the display is

blank because the watch's Power Saving function

has shut it to conserve power. Power Saving

automatically turns off the display and puts the

watch into a sleep state whenever your watch is

left in an area where it is dark for a certain

period.

· The initial factory default setting is Power Saving on.

· The watch recovers from the sleep state if you move it to a well-lit area*, if

you press any button, or if you angle the watch towards your face for

reading.

*It can take up to five seconds for the display to turn on.

· See "Power Saving Function" for more information.

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)

· 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 Data Recall or Alarm Mode, you must go to the Timekeeping

Mode first.

General Guide

· The illustration below shows which buttons you need to press to navigate

between modes.

Press D.

Data Recall Mode

Alarm Mode

Sensor Modes

Digital Compass Mode

Barometer/

Thermometer Mode

Timekeeping Mode

L D

Press B.

Altimeter Mode

Press D.

Press C.

Press E.

Timekeeping

Use the Timekeeping Mode to set and view the

current time and date.

To set the time and date

1. In the Timekeeping Mode, hold down A until

the seconds 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 : Minutes

PM indicator

Seconds

Month Day

Day of week

Year

Seconds

Hour

Minutes

Day

Month

12/24-Hour

Format

Power Saving

on/off

Day of

week

3. When the setting you want to change is flashing, use E to change it as

described below.

4. Press A to exit the setting screen.

Setting

Seconds

Hour, Minutes

12/24-Hour

format

Year, Month,

Day

Day of week

Power Saving

on/off

Button Operations

Press E to reset the seconds to

00.

Use E (+) to change the setting.

Use E to toggle between 12-hour (12H) and

24-hour (24H) timekeeping.

Use E (+) to change the setting.

Press E to toggle the Power Saving on

(On) and off (OFF).

Screen

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

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 20

seconds.

Direction

Direction value (in degrees)

Timekeeping Mode time

Magnetic north pointer

12 o'clock position

WSW

NNW

USER'S GUIDE 2471

· 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.

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 direction value 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.

· 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.

· The following table shows the meanings of each of the direction

abbreviations that appear on the display.

· See "Digital Compass Precautions" for other important information about

taking direction readings.

Direction Meaning

Direction

Meaning

Direction

Meaning

Direction

Meaning

NNE

ESE

SSW

WNW

North-

northeast

East-

southeast

South-

southwest

West-

northwest

Northeast

Southeast

Southwest

Northwest

East-

northeast

South-

southeast

West-

southwest

North-

northwest

ENE

SSE

WSW

NNW

North

East

South

West

Barometer/Thermometer

This watch uses a pressure sensor to measure air pressure (barometric

pressure) and a temperature sensor to measure temperature.

· You can calibrate the temperature sensor and the pressure sensor if you

suspect that readings are incorrect.

To take Barometric Pressure and Temperature Readings

Pressing C in the Timekeeping Mode or in any

of the other sensor modes enters the Barometer/

Thermometer Mode. The watch automatically

starts barometric pressure and temperature

measurement, and displays the results.

· Barometric pressure is displayed in units of

1hPa/mb (or 0.05 inHg).

· Temperature is displayed in units of 0.1°C (or

0.2

°F).

Barometric pressure graph

(unit: 1hPa (mb)/0.05 inHg)

Temperature

Barometric pressure

· The displayed barometric pressure value changes toxxxx hPa/mb (or

inHg) if a 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.

· The displayed temperature value changes to xx. x °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 be displayed again as soon as the

measured temperature is within the allowable range.

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

millibars (mb). It really makes no difference, because 1hPa = 1mb. In this

manual, we use hPa/mb or hPa (mb).

· See "About Barometric and Temperature Measurements" for important

precautions.

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)/

0.05 inHg, while one dot below is minus 1hPa(mb)/0.05 inHg. The following

shows how to interpret the data that appears on the barometric pressure

graph.

A rising graph generally means improving weather.

A falling graph generally means deteriorating weather.

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 1,100 hPa/mb or

7.65 inHg to 32.45 inHg)

· Sensor malfunction

· Dead batteries

About Barometric and Temperature Measurements

· Barometric pressure and temperature measurement operations are

performed as soon as you enter the Barometer/Thermometer Mode. After

that, barometric pressure and temperature measurements are taken every

five seconds for the first three minutes.

· The BARO indicator flashes on the display while a measurement is in

progress.

Not visible on

the display.

· 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 hecto-

pascals/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".

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 pre-

programmed 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.

· To avoid the effect of sudden temperature changes on measurement, wear

the watch so it is in direct contact with your wrist during measurement.

· 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.

· Remember that the air inside of a commercial aircraft is pressurized.

Because of this, the readings produced by this watch will not match the

altitude readings announced or indicated the flight crew.

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.

USER'S GUIDE 2471

With a Reference Altitude

· If you set a reference altitude, the watch

uses that value when calculating altitude

based on air pressure.

· 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.

400

To take an altitude reading

Pressing E in the Timekeeping Mode or in any of the other sensor modes

enters the Altimeter Mode. The watch automatically starts altitude

measurement, and displays the results.

· See "About Altitude Measurements" for important information.

· 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).

About one

second later

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

Altitude

Timekeeping Mode time

· 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 xxxxx meters (or feet) if a

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".

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

You can perform Altimeter Mode measurements in the Altimeter Mode only,

and an altimeter measurement operation starts whenever you enter the

Altimeter Mode.

During the first three minutes after entering the Altimeter Mode, ALTI flashes

on the display and measurements are taken every five seconds. After that,

the interval between measurements depends on whether you are using the

Short Mode (1-minute intervals) or the Long Mode (2-minute intervals).

· Long Mode is the default setting. See "Memory measurement" for

information about the Short Mode and Long Mode.

· If you do not perform any operation while in the Altimeter Mode, the watch

automatically returns to the Timekeeping Mode after four or five hours in

the Short Mode, or after nine or 10 hours in the Long Mode.

Memory measurement

The memory measurement operation stores the following data in watch

memory. Note that each time you perform a memory measurement operation,

it creates a new set of records, replacing the set of records currently in

memory. Memory measurement continues to be performed (indicated by the

REC indicator flashing on the display) even if you change to another mode.

Measurement start time, date, and altitude: 1 record

Automatic altitude readings and time, at fixed interval: Up to 39 records

Measurement end time, date, and altitude: 1 record

The watch also calculates the following values using measured data and

maintains one record for each in memory.

Relative altitude (altitude difference between start point and current altitude or

measurement end altitude)

Measurement time

Maximum altitude (highest measured altitude in memory)

Total ascent (total of ascents (A + B))

Cumulative total ascent (total of all measured altitude values in memory)

Start point

Stop point

Maximum altitude

· Starting a new measurement automatically clears relative altitude,

measurement time, maximum altitude, and total ascent values currently in

memory.

· Starting a new measurement does not clear cumulative total ascent. This

value continues to increase until it reaches 99,995 meters (327,983 feet).

After that, it reverts to 0 and starts again.

· The interval between memory measurements depends on whether the

Short Mode or the Long Mode is selected.

Short Mode: 5-minute interval

Long Mode: 15-minute interval

· Relative altitude, cumulative total ascent, and maximum altitude data is

calculated at regular intervals, depending on the Long Mode/Short Mode

setting. In both modes, calculations are performed every five seconds for the

first three minutes. After that, calculations are performed every minute in the

Short Mode and every two minutes in the Long Mode.

To select the Short Mode or Long Mode

1. In the Altimeter Mode, hold down A until the

display clears. After four or five seconds,

either OFF or the current reference altitude

value (if set) starts to flash, which indicates

the setting screen.

· OFF indicates no reference altitude.

l l l l l l l l

· Note that you will not be able to change the

Short/Long Mode setting if a memory

measurement operation is in progress.

2. Press D twice.

· This causes either 0:05 (Short Mode) or

0:15 (Long Mode) to appear, which

indicates the current mode setting.

3. Each press of E toggles between the Short

Mode and Long Mode.

4. Press A to exit the setting screen.

To perform memory measurement

Hold down E for about one second until REC

flashes, which indicates that memory

measurement has started.

· Memory measurement stops automatically

after there are 41 records accumulated in

memory. When you want to stop a memory

measurement operation manually, hold down

E for about one second until REC disappears.

l l l l l

l l

l l l

lll

l l l

· While a memory measurement operation is in progress, press A to toggle

between the Standard Altitude screen and the Relative Altitude screen.

Note

· REC flashes on the display while a memory measurement operation is in

progress.

· Starting the memory measurement operation deletes any altimeter data

(except for cumulative total ascent data) currently in memory (and its graph)

and replaces it with the new data. Note that you cannot delete memory

contents manually.

Relative altitude

Press A.

Altitude

Timekeeping Mode time

Standard Altitude

Screen

Relative Altitude

Screen

Measurement time

REL indicator

l l l l l l l l

· You can recall data in memory using the Data Recall Mode.

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.

To set a reference altitude

1. In the Altimeter Mode, hold down A until the

display clears. After four or five seconds,

either OFF or the current reference altitude

value (if set) starts to flash, which indicates

the setting screen.

2. Press E (+) or B () to change the current

reference altitude value by 5 meters (or 20 feet).

· You can set the reference altitude within the

range of 10,000 to 10,000 meters (32,800

to 32,800 feet).

USER'S GUIDE 2471

· Pressing E and B at the same time returns to OFF(no reference

altitude)

, so the watch performs air pressure to altitude conversions

based on preset data only.

3. Press A to exit the setting screen.

About the Altitude Alarm

The altitude alarm sounds for about five seconds when the current altitude

matches a preset value during an altitude measurement operation. You can

press any button to stop the alarm after it starts to sound.

The altitude alarm sounds only while the Altimeter Mode's Altitude Screen is

on the display. It does not sound while the watch is in another mode or while

another Altimeter Mode screen is on the display.

Example

If you set the altitude alarm at 130 meters, it sounds when you pass the 130-

meter mark on your way up and on your way back down.

To set the altitude alarm

1. In the Altimeter Mode, hold down A until the

display clears. After four or five seconds,

either OFF or the current reference altitude

value (if set) starts to flash, which indicates

the setting screen.

2. Press D once to move the flashing to the

altitude alarm setting.

· Press D to move the flashing in the

sequence shown below.

Altitude

Alarm

Long/Short

Mode Setting

Altitude

Unit

Reference

Altitude

3. Press E (+) or B () to change the current

altitude alarm value by 5 meters (or 20 feet).

· You can set the altitude alarm value within

the range of 10,000 to 10,000 meters

(32,800 to 32,800 feet).

l l ll

llll

l l l l l

lll

Altitude alarm value

· Pressing E and B at the same time resets the altitude alarm value to O.

4. Press A to exit the setting screen.

To turn the altitude alarm on and off

1. In the Altimeter Mode, hold down A until the

display clears. After four or five seconds,

either OFF or the current reference altitude

value (if set) starts to flash, which indicates

the setting screen.

2. Press D once to move the flashing to the

altitude alarm setting.

3. Press C to toggle the altitude alarm on (ON)

and off (OFF).

4. Press A to exit the setting screen.

· An altitude alarm on indicator appears on the

Altimeter Mode's Altitude Screen while the

altitude alarm is turned on. This indicator does

not appear on any other screen or in any other

mode.

Altitude alarm on indicator

Current On/Off status

Data Recall

Use the Data Recall Mode to view memory measurement data.

To view memory measurement data

1. Enter the Data Recall Mode.

2. Press E to cycle through the various data screens in the sequence

shown below.

· To view the cumulative total ascent value, press C.

· If an error occurs during memory measurement, the xxxxx is shown for

the relative altitude in the Data Recall Mode.

Altitude

Recording date

(Year, Month Day)

Alternates at

1-second intervals.

Recording time (Hour : Minutes)

Press E.

Start Time Data

Measurement

Data

End Time

Data

Press

Measurement Time

Relative Altitude

Total Ascent

Maximum Altitude

Cumulative

Total Ascent

Alarm

After you set (and turn on) the daily alarm, the

alarm tone sounds when the alarm time is

reached. You can also turn on an Hourly Time

Signal that causes the watch to beep for about

one second every hour on the hour.

· All of the operations in this section are

performed in the Alarm Mode, which you enter

by pressing D.

Alarm time (Hour : Minutes)

Alarm on indicator

Timekeeping Mode time

Hourly time signal on

indicator

To set the alarm time

1. In the Alarm Mode, hold down A until the

hour setting of the alarm time starts to flash,

which indicates the setting screen.

· This automatically turns on the alarm.

2. Press D to move the flashing between the

hour and minute settings.

3. While a setting is flashing, use E to increase it.

· When setting the alarm time using the 12-hour format, take care to set

the time correctly as a.m. (no indicator) or p.m. (P indicator).

4. Press A to exit the setting screen.

Alarm Operation

The alarm sounds at the preset time for about 10 seconds (in all modes), or

until you stop it by pressing any button.

To test the alarm

In the Alarm Mode, hold down E to sound the alarm.

l ll

lll

l l

To turn the daily alarm and the Hourly Time Signal on and off

In the Alarm Mode, press E to cycle through the settings shown below.

· The alarm on indicator and the Hourly Time Signal on indicator are shown

on the display in all modes while these functions are turned on.

Alarm On

Signal On

Alarm Off

Signal Off

Alarm On

Signal Off

Alarm Off

Signal On

Alarm On Indicator / Hourly Time Signal On Indicator

Backlight

The backlight uses an EL (electro-luminescent)

panel that causes the entire display to glow for

easy reading in the dark. The watch's auto light

switch automatically turns on the backlight when

you angle the watch towards your face.

· The auto light switch must be turned on

(indicated by the auto light switch on indicator)

for it to operate.

· See "Backlight Precautions" for other important

information about using the backlight.

Auto light switch on

indicator

USER'S GUIDE 2471

To turn on the backlight manually

In any mode, press L to illuminate the display for about two seconds.

· The above operation turns on the backlight regardless of the current auto

light switch setting.

About the Auto Light Switch

Turning on the auto light switch causes the backlight to turn on for about two

seconds, whenever you position your wrist as described below in any mode.

Note that this watch features a "Full Auto EL Light," so the auto light switch

operates only when available light is below a certain level. It does not turn on

the backlight under bright light.

Moving the watch to a position that is parallel to the ground and then tilting

it towards you more than 40 degrees causes the backlight to turn on.

Parallel to

ground

More than

Warning!

· Always make sure you are in a safe place whenever you are reading

the display of the watch using the auto light switch. Be especially

careful when running or engaged in any other activity that can result

in accident or injury. Also take care that sudden illumination by the

auto light switch does not surprise or distract others around you.

· When you are wearing the watch, make sure that its auto light switch

is turned off before riding on a bicycle or operating a motorcycle or

any other motor vehicle. Sudden and unintended operation of the auto

light switch can create a distraction, which can result in a traffic

accident and serious personal injury.

To turn the auto light switch on and off

In the Timekeeping Mode, hold down C for about one second to toggle the

auto light switch on (

displayed) or off (

not displayed).

· Pressing C while in the Timekeeping Mode changes to the Barometer/

Thermometer Mode, but keep C depressed for about one second to turn

the auto light switch on or off. After that, you can return to the Timekeeping

Mode by pressing D.

· The auto light switch on indicator (

) is on the display in all modes

while the auto light switch is turned on.

Questions & Answers

Question: What causes incorrect direction readings?

Answer:

· Incorrect bidirectional calibration. Perform bidirectional calibration.

· Nearby source of strong magnetism, such as a household appliance, a

large steel bridge, a steel beam, overhead wires, etc., or an attempt to

perform direction measurement on a train, boat, etc. Move away from large

metal objects and try again. Note that digital compass operation cannot be

performed inside a train, boat, etc.

Question: What causes different direction readings to produce different

results at the same location ?

Answer:

Magnetism generated by nearby high-tension wires are interfering

with detection of terrestrial magnetism. Move away from the high-

tension wires and try again.

Question: Why am I having problems taking direction readings indoors ?

Answer:

A TV, personal computer, speakers, or some other object is

interfering with terrestrial magnetism readings. Move away from

the object causing the interference or take the direction reading

outdoors. Indoor taking direction readings are particularly difficult

inside ferro-concrete structures. Remember that you will not be

able to take direction readings inside of trains, airplanes, etc.

Question: How does the altimeter work?

Answer:

Generally, air pressure and temperature decrease as altitude

increases. This watch bases its altitude measurements on

International Standard Atmosphere (ISA) values stipulated by the

International Civil Aviation Organization (ICAO). These values

define relationships between altitude, air pressure, and

temperature.

0 ft

2000 ft

4000 ft

6000 ft

8000 ft

10000 ft

12000 ft

14000 ft

25.84 inHg

22.23 inHg

19.03 inHg

44.7

°F

30.5

°F

16.2

°F

59.0

°F

29.92 inHg

About 3.6

°F

per 1000 ft

About 0.15 inHg per 200 ft

About 0.17 inHg per 200 ft

About 0.192 inHg per 200 ft

About 0.21 inHg per 200 ft

Source: International Civil Aviation Organization

0 m

500 m

1000 m

1500 m

2000 m

2500 m

3000 m

3500 m

4000 m

899 hPa/mb

795 hPa/mb

701 hPa/mb

616 hPa/mb

8.5

°C

4.5

°C

1013 hPa/mb

About 6.5

°C

per 1000 m

About 8 hPa/mb per 100 m

About 9 hPa/mb per 100 m

About 10 hPa/mb per 100 m

About 11 hPa/mb per 100 m

About 12 hPa/mb per 100 m

Altitude

Air Pressure

Temperature

· 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

There are two standard methods of expressing altitude: Absolute altitude and

relative altitude. Absolute altitude expresses an absolute height above sea

level. Relative altitude expresses the difference between the height of two

different places.

Height of building 130 m

(Relative altitude)

Rooftop at an altitude of

230 m above sea level

(Altitude above sea

level)

Sea

Precautions Concerning Simultaneous Measurement of Altitude and

Temperature

Though you can perform altitude and temperature measurements at the same

time, you should remember that each of these measurements require

different conditions for best results. With temperature measurement, it is best

to remove the watch from your wrist in order to eliminate the effects of body

heat. In the case of altitude measurement, on the other hand, it is better to

leave the watch on your wrist, because doing so keeps the watch at a

constant temperature, which contributes to more accurate altitude

measurements.

The following describes what you should do to give priority to either altitude or

temperature.

· To give altitude measurement priority, leave the watch on your wrist or in

any other location where the temperature of the watch is kept constant.

· To give temperature measurement priority, remove the watch from your

wrist and allow it to hand freely from your bag or in another location where

it is not exposed to direct sunlight. Note that removing the watch from your

wrist can momentarily affect pressure sensor readings.

Question: How does the barometer work?

Answer:

Barometric pressure indicates changes in the atmosphere, and by

monitoring these changes you can predict the weather with

reasonable accuracy. Rising atmospheric pressure indicates good

weather, while falling pressure indicates deterioration weather

conditions.

The barometric pressures that you see in the newspaper and on

the TV weather report are measurements corrected to values

measured at 0 m sea level.

Battery

This watch is equipped with a solar cell and a

rechargeable battery (secondary battery) that is

charged by the electrical power produced by the

solar cell.

Important!

· Storing the watch for long periods in an area

where there is no light or wearing it in such a

way that it is blocked from exposure to light can

cause rechargeable battery power to run down.

Be sure that the watch is normally exposed to

bright light whenever possible.

Solar cell panel