CASIO PRT71-1AV - Owner's Manual Immediate Download

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Module No.

2307/2335/2355/2357

GENERAL GUIDE

· Press C to change from mode to mode.

· Holding down C in any mode for about one second returns to the normal

timekeeping screen.

· Pressing C after performing some operation in the Recall Mode, Alarm

Mode, or Countdown Alarm Mode returns to the normal timekeeping

screen.

· The configuration of your watch may differ somewhat from that shown in the

illustration.

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630

Timekeeping Mode

· Pressing B in any mode besides the Countdown Alarm Mode or

Stopwatch Mode illuminates the display for about 1.5 second. The backlight

is disabled while a setting screen is on the display.

· For Module 2307 and 2357, the backlight illuminates both the digital display

and analog face. For Module 2335 and 2355, the backlight illuminates the

digital display only.

· If you do not perform any operation for a few minutes while a setting screen

(with flashing digits) is on the display, the watch automatically exits the

setting screen.

· If you do not perform any operation for about 10 hours in the Barometer

Mode, Altimeter Mode, or Thermometer Mode, the watch automatically

reverts to the Timekeeping Mode screen.

A L

7OO

Press D.

8 A0

1 13

Barometer Mode

1 50

Altimeter Mode

E NP

1 5

Thermometer Mode

0 OO

Stopwatch Mode

0 OO

Countdown Alarm Mode

Press

Press C.

Press

Press C.

Press D.

A C

1 50

Recall Mode

Alarm Mode

TIMEKEEPING MODE

· Pressing D changes the display in the sequence shown below.

· The display type you select is used until you change it.

To set the time and date

1. While in the Timekeeping Mode, hold down A until the seconds digits

flash on the display.

2. Press C to move the selection (flashing) in the following sequence.

Seconds

Hour

Minutes

12/24

Year

Month

Day

3. While the seconds setting is selected (flashing), press D to reset it to 00.

If you press D while the seconds setting is in the range of 30 to 59, the

seconds are reset to 00 and 1 is added to the minutes. If the seconds

setting is in the range of 00 to 29, the minutes count is unchanged.

· While the 12/24-hour format setting is selected, press D to toggle it

between 12 and 24.

Day of week

Month Day

· When the 12-hour format is selected, the indicator P appears on the diaplay

to indicate "p.m." times. There is no indicator for "a.m." times. Selecting the

24-hour format causes the 24 to appear on the display.

· While any other setting is selected (flashing), press D to increase the

number or B to decrease it.

· Holding down either button changes the setting at high speed.

4. After you set the time and date, press A to change to the contrast setting

screen.

· The indicator CNT appears on the left of the screen, and the value

indicating the current contrast setting flashes on the right.

· You can set the contrast to one of 11 levels in the range of 5 to +5.

5. Press D to make the display darker, or B to make it lighter.

6. After the contrast is the setting you want, press A to return to the normal

timekeeping screen.

· The day of the week is automatically set in accordance with the date.

· The date can be set within the range of January 1, 1995 to December 31,

2039.

· The watch's built-in full automatic calendar automatically makes allowances

for different month lengths and leap years. Once you set the date, there

should be no reason to change it except after the replacement of the

watch's battery.

To set the analog time

1. Pull the crown out to stop the second hand.

· If you plan to restart analog timekeeping on some time signal (from the

radio or television), pull the crown out when the second hand is at the 12

o'clock position.

2. Set the hands by turning the crown.

3. Push the crown back in to restart timekeeping.

· Analog time is kept by a mechanical timepiece. Because of this, the second

hand may not start to move exactly when you push the crown back in.

Press D.

Crown

Press D.

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630

Seconds

Hour : Minutes

PM indicator

Barometric pressure graph

*See "BAROMETER MODE".

Month Day

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Parallel to

ground

More than

ABOUT THE BACKLIGHT

This watch features an electroluminescent (EL) backlight that helps you easily

read the face, even in total darkness. Its Auto Backlight function automatically

lights the watch face whenever you turn your wrist towards your face.

· For Module 2307 and 2357, the backlight

illuminates both the digital display and

analog face. For Module 2335 and 2355, the

backlight illuminates the digital display only.

Note

· The backlight of the watch employs an electroluminescent (EL) light, which

loses illuminating power after very long use.

· Frequent use of the backlight shortens the battery life.

· The illumination provided by the backlight may be hard to see when viewed

under direct sunlight.

· The watch will emit an audible sound whenever the display is illuminated. It

does not indicate malfunction of the watch.

· The backlight automatically turns off whenever an alarm sounds.

To manually turn on the backlight

· Pressing B in any mode besides the Countdown Alarm Mode or

Stopwatch Mode illuminates the display for about 1.5 second. The backlight

is disabled while a setting screen is on the display.

To switch the auto backlight function on and off

While in the Timekeeping Mode, hold down D for one second to turn the Auto

Backlight function on and off.

Hold down D.

1 08

Auto backlight

indicator

OFF

8 88

1 08

8 88

1 08

· The auto backlight indicator is shown on the display in all modes while the

auto backlight function is on.

· In order to protect against running down the battery, the auto backlight

function is automatically turned off approximately six hours after you turn it

on. Repeat the above procedure to turn the auto backlight function back on

if you want.

· Pressing B in any mode besides the Countdown Alarm Mode or

Stopwatch Mode illuminates the display for about 1.5 second, regardless of

the auto backlight function on/off setting.

About the Auto Backlight function

While the Auto Backlight function is turned on, the backlight automatically

lights for about 1.5 second in any mode whenever you position your wrist as

described below.

Important!

Avoid wearing the watch on the inside of your wrist. Doing so causes the Auto

Backlight to operate when it is not needed, which shortens battery life.

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 illuminate.

· The backlight may not illuminate if the face of the watch is more than 15

degrees off parallel as shown below. Make sure that the back of your hand

is parallel to the ground.

More than 15 degrees

too low

Parallel to ground

More than 15 degrees

too high

· Static electricity or magnetic force can interfere with proper operation of the

auto backlight function. If the auto backlight does not illuminate, try moving

the watch back to the starting position (parallel with the ground) and then tilt

it back towards you again. If this does not work, drop your arm all the way

down so it hangs at your side, and then bring it back up again.

· Under certain conditions the backlight may not light until about one second

or less after turn the face of the watch towards you. This does not

necessarily indicate malfunction of the backlight.

Warning!

· Never try to read your watch when mountain climbing or hiking in

areas that are dark or in areas with poor footing. Doing so is

dangerous and can result in serious personal injury.

· Never try to read your watch when running where there is the danger

of accidents, especially in locations where there might be vehicular or

pedestrian traffic. Doing so is dangerous and can result in serious

personal injury.

· Never try to read your watch when riding on a bicycle or when

operating a motorcycle or any other motor vehicle. Doing so is

dangerous and can result in a traffic accident and serious personal

injury.

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

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

motorcycle or any other motor vehicle. Sudden and unintended

operation of the auto backlight can create a distraction, which can

result in a traffic accident and serious personal injury.

BAROMETER MODE

This watch uses a pressure sensor to measure barometric pressure. It can be

adjusted to correct for measurement error.

Important !

The barometer that is built into this watch measures changes in barometric

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.

Example barometer applications

· Before going mountain climbing, you can take readings to predict upcoming

weather.

· You can predict the weather for golf or other outdoor activities.

About barometric pressure measurements

The watch takes barometric pressure measurements every five seconds for

the first two minutes after you enter the Barometer Mode. The Barometer

Mode indicator 1 flashes on the display during these two minutes.

After the first two minutes, the Barometer Mode indicator 1 stops flashing, and

the watch automatically takes measurements every two hours (starting from

midnight).

The watch continues to take barometric pressure readings every two hours,

even if you change to another mode. Measurement data can be viewed on the

Timekeeping Mode screen on the barometric pressure graph.

*1 The barometric pressure graph shows the barometric pressure readings

for the past 18 hours. The flashing point on the right of the display is the

point of the last measurement.

*2 The displays show " hPa" (or inHg) if a measured value falls outside

the range of 460 hPa/mb to 1100 hPa/mb (13.55 inHg to 32.45 inHg). The

normal display will return as soon as the pressure returns with the

allowable range.

8 A0

1 13

Barometer Mode indicator 2

Remaining memory

Barometric pressure graph *1

Press A.

Unit of measurement

Last measurement *2

(updated every two hours)

5 seconds

later

Barometer Mode

indicator 1

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Using the barometric pressure graph

Barometric pressure is affected by changes in weather and temperature. The

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

pressure graph.

A rising graph generally means better 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

pressure 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 (460 hPa/mb to 1100 hPa/mb/13.55

inHg to 32.45 inHg).

· Sensor malfunction.

· Dead battery.

Selecting the unit of measurement

1. Use C to enter the Barometer Mode.

2. Hold down A until "OFF" or the current barometric pressure value flashes

on the display.

3. Press C to change to the measurement unit selection screen.

4. Each press of D or B cycles the barometric pressure measurement unit

as shown below.

hPa

inHg

5. After you select the measurement unit you want, press A to return to the

Barometer Mode screen.

· Note that all measurement data currently in memory is also deleted

whenever you change the barometric pressure, altitude, or temperature unit

of measurement.

Calibrating the barometric pressure measurement

The sensor of this watch is calibrated at the factory before shipment, and

further adjustment is normally not required. If noticeable error is found in the

barometric pressure readings produced by the watch, you can adjust it to

correct the error.

Important!

Incorrectly calibrating the barometric pressure measurement of this watch can

result in incorrect readings. Compare the readings produced by the watch with

those of another reliable, accurate barometer.

Calibrating the barometric pressure

1. Use C to enter the Barometer Mode.

2. Hold down A until "OFF" or the current barometric pressure calibration

value flashes on the display.

· "OFF" appears when the factory setting is currently set as the current

barometric pressure calibration value.

3. Each press of D increases the displayed barometric pressure by 1 hPa/mb,

while pressing B decreases it. Holding down either button changes the

value at high speed.

· If inHg is currently selected as the unit of measurement, the above

operations change the reading by 0.05 inHg.

· Pressing B and D at the same time returns to the "OFF" setting.

4. After calibrating the barometric pressure, press A to return to the

Barometer Mode screen.

1 50

Altimeter Mode indicator 2

Remaining memory

Altitude graph

Press A.

Unit of measurement

Current altitude

5 seconds

later

400

Altimeter Mode

indicator 1

ALTIMETER MODE

A built-in altimeter uses a pressure sensor to detect the current barometric

pressure, which is then used to estimate the current altitude in accordance

with ISA (International Standard Atmosphere) values for altitude and

barometric pressure. If you preset a reference altitude, the watch will also

calculate the current relative altitude based on your preset value.

Important !

· This watch estimates altitude based on barometric pressure. This means

that altitude readings for the same location may vary if barometric pressure

changes.

· Sudden changes in the weather make it impossible to produce accurate

altitude readings.

· 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 use this watch while participating in sports where there are sudden

altitude changes. Also, do not use this watch for applications that demand

professional or industrial level precision. This watch should not be used

while engaging in the following activities: skydiving, hang gliding,

paragliding, gyrocopter riding, glider riding, etc.

Applications

When no reference altitude is preset:

· The watch produces approximate altitude readings.

When a reference altitude is preset:

· Before beginning the climb, set the reference altitude to 0 meter at the foot

of the mountain. This makes it possible to determine the difference in

altitude between the reference point and your destination.

· To determine the height of a tall building, set the reference altitude to 0

meter on the ground floor. Note that you

may not be able to get a good reading if

the building is pressurized or air-

conditioned.

· To determine the difference in altitude

between your house and another location, set the reference altitude to 0

meter at your house, and then check the reading when you arrive at the

other location.

· When mountain climbing, you can input

the altitude from a marker as your

reference altitude, which will then let you

know your altitude as your climb

proceeds. The following conditions will

prevent you from obtaining accurate

readings:

When barometric pressure changes because of changes in the weather

Extreme temperature changes

When the watch itself is subjected to strong impact

About altitude measurements

The watch measures altitude every five seconds for the first two minutes after

you enter the Altimeter Mode. The Altimeter Mode indicator 1 flashes on the

display during these two minutes.

After the first two minutes, the Altimeter Mode indicator 1 stops flashing, and

the watch automatically takes measurements every two minutes (on even

numbered minutes).

The display unit for Altimeter Mode measurements is 5 meters (20 feet), and

the display range is 0 to 6,000 meters (0 to 19,680 feet).

· The measured altitude may be a negative value in cases where there is a

reference altitude value set or because of certain barometric pressure

conditions.

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Selecting the measurement unit

1. Use C to enter the Altimeter Mode.

2. Hold down A until "OFF" or the current reference altitude value flashes on

the display.

3. Press C to change to the measurement unit selection screen.

4. Each press of D or B toggles the altitude measurement unit as shown

below.

5. After you select the measurement unit you want, press A to return to the

Altimeter Mode screen.

· Note that all measurement data currently in memory is also deleted

whenever you change the barometric pressure, altitude, or temperature unit

of measurement

Setting a reference altitude

After you set a reference altitude, the watch automatically calculates the

difference between the current altitude and your preset value. The altitude

measurements produced by this watch are subject to error caused by changes

in barometric pressure. Because of this, we recommend that you set the

reference altitude during your climb whenever one is available.

1. Use C to enter the Altimeter Mode.

2. Hold down A until "OFF" or the current reference altitude value flashes on

the display.

· "OFF" appears when the factory setting is currently set as the reference

altitude value.

3. Each press of D increases the displayed altitude by 5 m, while pressing

B decreases it. Holding down either button changes the value at high

speed.

· If you have selected feet as your unit of measurement, the above

operations change the reading by 20 feet.

· You can set the reference altitude within the range of 6,000 meters to

6,000 meters (19,680 feet to 19,680 feet).

· Pressing B and D at the same time returns to the "OFF" setting.

4. After setting the reference altitude you want, press A to return to the

Altimeter Mode screen.

THERMOMETER MODE

A built-in temperature sensor measures temperature and shows the measured

value on the display. The thermometer can be calibrated to correct for errors.

Important!

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 temperature of the surrounding air.

About temperature measurements

The watch takes temperature measurements every five seconds for the first

two minutes after you enter the Thermometer Mode. The Thermometer Mode

indicator 1 flashes on the display during these two minutes.

After the first two minutes, the Thermometer Mode indicator 1 stops flashing,

and the watch automatically takes measurements every five minutes.

Understanding the temperature display

The display shows " .

°C" (or °F) if a measured value falls outside the

range of 10.0

°C to 60.0°C (14.0°F to 140.0°F). The normal display will return

as soon as the temperature returns within the allowable range.

E NP

1 5

Thermometer Mode indicator 2

Remaining memory

Temperature graph

Press A.

Unit of measurement

Temperature

2 seconds

later

Thermometer Mode

indicator 1

Selecting the measurement unit

1. Use C to enter the Thermometer Mode.

2. Hold down A until "OFF" or the current temperature calibration value

flashes on the display.

3. Press C to change to the measurement unit selection screen.

4. Each press of D or B toggles the temperature measurement unit as

shown below.

°C

°F

5. After you select the measurement unit you want, press A to return to the

Thermometer Mode screen.

· Note that all measurement data currently in memory is also deleted

whenever you change the barometric pressure, altitude, or temperature unit

of measurement.

Calibrating the temperature measurement

The temperature sensor of this watch is calibrated at the factory before

shipment, and further adjustment is normally not required. If noticeable error is

found in the temperature readings produced by the watch, you can adjust it to

correct the error.

Important!

Incorrectly calibrating the temperature measurement of this watch can result

in incorrect readings. Carefully read the following before doing anything.

· Compare the readings produced by the watch with those of another

reliable, accurate thermometer.

· If adjustment is required, remove the watch from your wrist and wait for 20

or 30 minutes to give the temperature of the watch time to stabilize.

Calibrating the temperature

1. Use C to enter the Thermometer Mode.

2. Hold down A until "OFF" or the current temperature calibration value

flashes on the display.

· "OFF" appears when the factory setting is currently set as the current

temperature calibration value.

3. Each press of D increases the displayed temperature by 0.1

°C, while

pressing B decreases it. Holding down either button changes the value at

high speed.

· If Fahrenheit is currently selected as the unit of measurement, the above

operations change the reading by 0.2

°F.

· Pressing B and D at the same time returns to the "OFF" setting.

4. After calibrating the temperature, press A to return to the Thermometer

Mode screen.

MEMORY

The watch is equipped with memory that you can use to store up to 10

barometric pressure, altitude, and temperature readings. Note that the date

and time of the measurement is not included with the data. The number of

available blank records that can be used to store data is shown on the right

side of the Barometer, Altimeter, and Thermometer Mode screens.

Storing a Measurement

While in the Barometer, Altimeter, or Thermometer Mode, hold down D for

about one second until the watch beeps, indicating that the latest

measurement is stored in memory.

· The message "FULL" appears on the display for about one second when

you hold down D while memory is full. No more data can be stored while

memory is full.

· If you want to store more data after memory becomes full, use the

procedure under "Recall Mode" below to delete the current data to make

room for new data.

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1 OO

A L

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RECALL MODE

Recalling data

1. Use C to enter the Recall Mode.

2. Each press of D cycles through the barometric pressure, altitude, and

temperature data in memory. Mode indicators appear to tell you what type

of data is currently displayed.

· Note that measurement units are not indicated on the Recall Mode screens.

· The display shows "- - - - " if there is no data.

Deleting Data

While in the Recall Mode, hold down A. The

watch beeps, and the message CLR flashes

on the display to indicate data is about to be

deleted. Keep A depressed for about two

seconds to delete all the measurement data

currently in memory.

· Note that this procedure deletes all

measurement data in memory. You cannot

delete individual records.

A C

1 50

Memory number

1 second

later

Altitude

Recall Mode indicator

C A

ALARM MODE

When the Daily Alarm is turned on, the alarm sounds for 20 seconds at the

preset time each day. Press any button to stop the alarm after it starts to

sound.

When the Hourly Time Signal is turned on, the watch beeps every hour on the

hour.

To set the alarm time

1. Hold down A until the hour digits start to flash on the display. The hour

digits flash because they are

selected. At this time the alarm is

automatically turned on.

2. Press C to change the selection in the sequence shown below.

Minutes

Hour

3. Press D to increase the number or B to decrease it.

· Holding down either button changes the setting at high speed.

4. After you set the alarm time, press A to return to the Alarm Mode screen.

· The format (12-hour and 24-hour) of the alarm time matches the format you

select for normal timekeeping.

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

time correctly as morning or afternoon.

To stop the alarm

· Press any button to stop the alarm after it starts to sound.

Hourly time signal on

indicator

1 second

later

Alarm on indicator

Alarm Mode indicator

Alarm time

To turn the Daily Alarm and Hourly Time Signal on

and off

Press D while in the Alarm Mode to change the status of the Daily Alarm and

Hourly Time Signal in the sequence shown below.

· The alarm and hourly time signal indicator is displayed in all modes.

To test the alarm

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

Both ON

Both OFF

Hourly Time

Signal only

Daily Alarm only

COUNTDOWN ALARM MODE

The countdown alarm can be set within a range of 10 seconds to 60 minutes.

When the countdown reaches zero, an alarm sounds for 10 seconds or until

you press any button.

To set the countdown start time and auto repeat

function on and off

1. Hold down A while in the Countdown Alarm Mode. The minutes setting

flashes on the display because it is

selected.

2. Press C to change the selection in the sequence shown below.

Minutes

Seconds

Auto repeat ON/OFF

3. Press D to increase the selected setting or B to decrease it. Holding

down either button changes the setting at high speed.

· The seconds can be set in units of 10 seconds.

· Set 0 minutes, 0 seconds to specify a start time of 60 minutes.

· While the AUTO ON/OFF setting is selected (flashing), press D or B to

toggle auto repeat on and off.

4. After you set the countdown start time and auto repeat ON/OFF setting,

press A to return to the Countdown Alarm Mode screen.

To use the countdown alarm

1. Press D while in the Countdown Alarm Mode to start the countdown

alarm operation.

2. Press D again to stop the countdown alarm operation.

· You can resume a paused countdown alarm operation by pressing D.

3. Stop the countdown alarm and then press B to reset the countdown time

to its starting value.

· When the end of the countdown is reached and auto repeat is off, the alarm

sounds for 10 seconds or until you stop the alarm by pressing any button.

Countdown timing stops and the countdown time is automatically reset to its

starting value after the alarm stops.

· When the end of the countdown is reached while auto repeat is on, the

alarm sounds, but the countdown restarts from the beginning without

stopping. You can stop the countdown by pressing D and manually reset

to the start time by pressing B.

· When the start time is less than one minute and auto repeat is turned on,

the countdown alarm tone sounds for only one second instead of the

normal 10 seconds.

1/10 second

1 second

later

Minutes

Countdown Alarm Mode indicator

Seconds

Auto repeat ON

Auto repeat OFF

Auto repeat ON indicator

STOPWATCH MODE

The Stopwatch Mode lets you record elapsed time, split times, and two

finishes. The range of the stopwatch is 59 minutes, 59.99 seconds.

Stopwatch functions are available in the Stopwatch Mode, which you can

enter using C.

0 OO

1 second

later

Stopwatch Mode indicator

1/100 second

Minutes

Seconds

Stop

Clear

Start

(a) Elapsed time measurement

(b) Split time measurement

Start

Stop

Clear

Start

Split release

Clear

Record time of

second runner.

M D

M B

M D

Stop

Split

M B

Split

First runner

finishes.

Re-start

Split release

Stop

Second runner finishes.

Record time of first runner.