Casio 2891 User Manual

MA0509-EA

Operation Guide 2891

Keep your watch exposed to light!

Your watch runs on electrical power generated from light and stored by a chargeable battery. To ensure stable operation, make sure that the solar cell of the watch is exposed to light as much as possible.

1. How the solar cell and battery work

When exposed to light

When not exposed to light

Your watch continues to operate, even when it is not exposed to light. Leaving the watch in the dark can run down its battery and cause functions to become disabled.

Light

Rechargeable battery

Power supplied to watch

Rechargeable battery

Power supplied to watch

Solar cell

Electrical energy

Charge

Discharge

2. Avoid overuse of display illumination.

• Over use of display illumination can run down the battery.

Rechargeable battery

Power supplied to watch

The following shows approximately how much exposure to light is required to recharge the battery by the amount used by one display illumination operation.

• Sunlight through a window: 5 minutes

• Indoor fluorescent lighting: 50 minutes

Care is required when using the full auto light switch, which can cause frequent display illumination.

Using Your Watch for Mountain Climbing

Discharge

3. Tips on how to keep the battery charged.

• Try to ensure that the watch is always exposed to enough light to keep its battery indicator at LEVEL 1 or LEVEL 2. Some of the watch’s functions are disabled when battery power drops to LEVEL 3.

Light

Battery Indicator

Level 1 Level 2

Rechargeable battery

• Whenever you are not wearing the watch on your wrist, position it so the face (solar cell) is pointed in the direction of a source of bright light.

Solar Cell

Your watch has a number of built in sensors that allow you to take direction, altitude, barometric pressure, and temperature readings while mountain climbing or hiking.

Light

Level 3 Level 4

Leave the watch under fluorescent lighting, near a window, etc.

All functions enabled

Some functions disabled

• When wearing the watch, try to keep your sleeve from blocking its face (solar cell).

Charging efficiency is significantly reduced even if the face of the watch is only partially covered by your sleeve.

. Before getting started...

Check changes in barometric pressure to get an idea of what kind of weather to expect.

• See “Taking Pressure and Temperature Readings” for more information.

Pressure Tendency Graph

Barometric Pressure

Pressure/Temperature Mode

Temperature

Pressure Differential Graphic

. After you start climbing...

• Monitor the altitude on the display to see how high you have climbed. You can also record altitude records (including date and time) in memory.

• See “Taking Altitude Readings” for

more information.

Altitude Graph

Altitude

Altitude Mode

Differential Graphic

Current Time

• Use the digital compass to keep track of your current bearing.

• See “Taking Direction Readings” for

more information.

Digital Compass

Direction Angle

Compass Mode

Current Time

• You can also keep track of the current barometric pressure and temperature while climbing.

• See “Taking Pressure and

Temperature Readings” for more information.

Pressure Tendency Graph

Barometric Pressure

Pressure/Temperature Mode

Temperature

. After you get back home...

Recall altitude records from memory to retrace your climb and to make plans for your next climb.

• See “Viewing Altitude Memory Records” for more information.

Modes and Display Screens

Operation Guide 2891

• Use the A, B, and C buttons to enter each measurement mode, and automatically start taking the applicable readings. Press the D button to return to the Timekeeping Mode.

• If your do not perform any button operation for about nine or ten hours while in the Altitude Mode, the watch automatically returns to the Timekeeping Mode.

Compass Mode

Use this mode to keep track of your bearing.

Timekeeping Mode

Hour, Minutes

Day of the Week

Button

Pressure/Temperature Mode

This mode measures barometric pressure and temperature. It also displays the pressure tendency graph.

Altitude Mode

This mode measures your altitude. You can store altitude readings in memory for later recall.

PM indicator

(no display

for AM)

Button

Switching between Display Screens

Each press of the button switches the display between the day of the week/day, and the month/day.

Day of the Week Month, Day

Button

(Light)

Button

Seconds

Button

Power Saving

Power Saving causes the watch to enter a sleep state automatically in order to save power whenever it is left in the dark. The Power Saving feature of the watch is turned on at the factory.

• Note that the watch may also enter the sleep state if the watch is blocked from light by your sleeve.

• Each press of the D button causes the watch to beep and cycles through the Recall Mode, World Time Mode, Stopwatch Mode, Timer

Mode, Alarm Mode, and Receive Mode as shown below.

• If you do not perform any button operation for two or three minutes while in the Recall Mode, Alarm Mode, Receive Mode, Compass Mode, or Pressure/Temperature Mode, the watch will return to the Timekeeping Mode automatically.

Recall Mode

Use this mode to recall altitude records.

Receive Mode

Use this mode to check the date and time of the last successful signal reception, and to perform manual receive. You can also turn auto receive on and off in this mode.

Alarm Mode

Use the Alarm Mode to set the alarm, and to turn the hourly time signal on and off.

World Time lets you display the current time in any one of 30 cities (29 time zones) around the world.

The stopwatch performs 1/100 second elapsed time measurement up to 9 hours, 59 minutes, 59.99 seconds (10 hours).

The Timer Mode lets you set a start time up to 60 minutes in 1-minute steps. An alarm sounds for five seconds when the end of the countdown is reached.

World Time Mode

Stopwatch Mode

Timer Mode

How the sleep state works

• Display sleep state

The display sleep state is triggered whenever the watch is left in the dark for about one hour between the hours of 10 p.m. and 6 a.m.

• The watch does not enter the sleep state if it is in the Timer Mode or Stopwatch Mode.

• The display sleep state causes the display to go blank, except for a flashing Power Saving indicator. Alarm, hourly time signal, and Timer Mode progress alert and time up alert operate normally in the display sleep state.

• Function sleep state

The function sleep state is triggered whenever the watch is left in the dark for six or seven days.

• The Power Saving indicator stops flashing and remains on the display. Alarm, hourly time signal, and Timer Mode progress alert and time up alert do not operate in the function sleep state. In the function sleep state, 2-hour barometric pressure readings and auto receive also are not performed.

• Digital timekeeping functions continue to operate normally in

the function sleep state.

Power Saving Indicator

❚

To recover from the sleep state

Place the watch in an area that is well-lit, press any button, or angle the watch toward your face to illuminate the face of the watch using the full auto light switch (“Positioning Your Arm Correctly”).

• It can take up to two seconds before display figures re-appear after you place the watch in a well-lit area.

❚

To turn Power Saving on and off

See the procedure under “To configure Home City settings” for information about turning off Power Saving.

Leaving the watch in a drawer or anywhere else it is dark can cause Power Saving to trigger in order to conserve battery power.

Power Supply

The power supply of this watch uses a solar cell to generate electrical power, which is stored by a rechargeable battery. Using or storing the watch where it is not exposed to light regularly or allowing it to be blocked from light by your sleeve as you are wearing it can cause the power of the rechargeable battery to run down. To ensure stable operation, be sure to allow the watch to be exposed to light as much as possible when you are wearing or storing it.

Note that all data in memory and all settings are cleared whenever you allow the level of the rechargeable battery to drop to Level 5.

Recover Indicator

If you use the light or alarms a number of times during a short period, the RECOV indicator may appear on the display to indicate that the following operations are disabled in order to allow battery power to recover.

• Illumination

• Alarm and hourly time signal

• Timer Mode progress alert and

time up alarm

• Sensor readings

Normal operation will return after the battery recovers.

Recover Indicator

Operation Guide 2891

Battery Indicator

Level

• Exposing the watch to direct sunlight or other strong light may cause the battery level indicator to indicate a level that is momentarily higher than the actual battery level. Because of this, you should wait for a short while after charging to check the battery level indicator.

• Even if the battery level drops all the way to Level 5, you still will be able to recharge the battery and use the watch again.

• If you start charging from Level 5, the display of the watch will flash when the battery reaches Level 4. Note, however, that the watch’s functions will still remain disabled at this time, and you should continue to expose the watch to light so the battery can charge up the Level 2 or Level 1.

All functions enabled.

Illumination, alarms and other tones, sensor readings, and time calibration signal reception disabled.

Digital display, illumination, alarms and other tones, sensor readings, and time calibration signal reception disabled.

All functions, including timekeeping, disabled.

Start charging at Level 4!

Battery Level 4 indicates that remaining battery power is very low. Be sure to expose the watch to light for recharging as soon as possible after the Level 4 indicator starts to flash. Frequent display of the recover indicator also means that the battery is low. Expose the watch to light to charge the battery.

Charging Precautions

Avoid charging the watch in the following locations, and anywhere else where the watch may become very hot.

• On the dashboard of an automobile parked in the sun

• Very close to an incandescent light source or other sources of heat

• In a location exposed to direct sunlight for long periods

Note that the display panel may become black under very high temperatures. This is temporary, and the display will appear normal again at lower temperatures.

Depending on the light source you are using, the case of the watch may become quite hot during charging. Take care to guard against burn injury after charging.

❚

To charge the battery

Point the solar panel (face) of the watch at a light source.

• Remember that even a partial blockage of the solar cell reduces charging efficiency.

Example: Positioning the watch

Solar Cell

• The illustration shows the resin band model.

Charging Guide

Starting from a full charge, the watch should be able to continue operating for about five months without further charging under the example conditions described below.

Example Daily Use

• Illumination: 1.5 seconds/day

• Alarms: 10 seconds/day

• Direction Reading: 10 times/week

• Altitude Readings: 10 hours/month

• Signal Reception: 6 minutes/day

• Digital Display: 18 hours/day

Making sure the watch is exposed to light regularly ensure stable operation.

• Charge Times Required to Advance to a Higher Level

Exposure Level

(Brightness)

Outdoor Sunlight

(50,000 lux)

Sunlight Through a

Window (10,000 lux) Overcast Daylight

Through a Window

(5,000 lux)

Indoor Fluorescent

Lighting (500 lux)

• Note that the above charging times are for reference only. Actual charging time depends on a variety of environmental factors.

Approximate Exposure Time

Level 5 \ Level 4 \ Level 3 \ Level 2 \ Level 1

2 hours

4 hours

8 hours

80 hours

Required Daily Charging Time

•

The following is the daily amount of charging required each day to support the operations under “Example Daily Use”.

Exposure Level

(Brightness)

Outdoor Sunlight

(50,000 lux)

Sunlight Through a Window (10,000 lux)

Overcast Daylight

Through a Window

(5,000 lux)

Indoor Fluorescent

Lighting (500 lux)

Approximate

Exposure Time

5 minutes

24 minutes

48 minutes

8 hours

6 hours13 hours

29 hours63 hours

58 hours128 hours

– – – – – –

Power Loss Drop during Sensor Readings

Regardless of whether the current battery level is Level 2 or higher, the watch may determine that the current power level is not enough to driver the sensor in the Compass, Pressure, or Altitude Mode. If this happens, the display will appear as described below.

After Entering the Mode

Compass

Pressure

Altitude

• Normal operation should return after battery power recovers.

Blank

During Readings

– – –

Illumination

An EL (electro luminescent) panel is used for illumination for easy reading in the dark. A full auto light switch turns on illumination automatically when you angle the watch towards your face for reading.

❚

To turn on illumination manually

In any mode, press the button.

• You can specify 1.5 seconds or

2.5 seconds as the duration of display illumination (“To specify the illumination duration”).

• Pressing the L button turns on illumination regardless of

whether the full auto light switch is on or off.

You may hear a faint rattling sound when you move the watch around. This sound is caused by the movement of a metal bulb that controls operation of the full auto light switch, and does not indicate malfunction.

Operation Guide 2891

❚

To turn the full auto light switch on or off

The full auto light switch turns on illumination automatically whenever you angle the watch towards your face for reading, but only when it is dark.

• The full auto light switch does not turn on illumination when surrounding light is bright.

The full auto light switch turns on illumination for the specified illumination duration in all modes when the watch is angled towards the face.

In any mode (except when a setting screen is on the display), hold down the L button for about three seconds to toggle the full auto light switch on ( indicator displayed) and off (no indicator displayed).

Full Auto Light Switch On Indicator

(3 seconds)

❚

Positioning Your Arm Correctly

With the watch on your wrist, position it parallel with the ground.

• You should be wearing the watch on the outside of your wrist when using the full auto light switch.

• Make sure that the left (9 o’clock) and right (3 o’clock) sides of the watch are within ±15 degrees of being parallel with the ground. The full auto light switch may not operate properly if the angle is greater than 15 degrees.

Illumination Precautions

• The light may be difficult to see under bright sunlight.

• Illumination turns off automatically if an alarm sounds, etc.

• You may notice a slight sound from the watch while

illumination is turned on. This is the sound of EL panel vibration and does not indicate malfunction.

• Illumination is disabled during time calibration signal reception, while configuring sensor measurement mode settings, and during direction sensor calibration (“Calibrating the Direction Sensor”).

Rotate your arm so the watch is angled at about 40 degrees, so you can read its face.

At least 40 degrees

Full Auto Light Switch Precautions

• Frequent use of the full auto light switch can run down the battery.

• The full auto light switch may turn on illumination when the face of

the watch is shaded by your sleeve.

• Illumination may not turn on immediately when you angle the watch towards your face. This does not indicate malfunction.

• Illumination remains on for the specified duration (1.5 seconds or

2.5 seconds) only, even if you leave the watch angled towards your face.

• The full auto light switch is disabled automatically whenever the battery indicator reaches Level 4.

• Illumination may turn on unintentionally when you wear the watch on the inside of your wrist, when you shake your arm, or when you raise your arm. Be sure to turn off the full auto light switch whenever you do not need illumination.

• Keep the full auto light switch turned off whenever you are wearing the watch on the inside of your wrist.

• Electro-static charge and magnetism can interfere with full auto light switch operation and even make operation impossible. If this happens, lower your arm to the starting position and then raise it again. If you still have trouble with illumination, try lowering your arm down to your side and then raise it to your face for reading.

• The full auto light switch is disabled during the 20 seconds required to take a direction reading with the digital compass.

To specify the illumination duration

1. In the Timekeeping Mode,

hold down the for about two seconds until the city code and GMT differential start to flash. This is the setting screen.

2. Press the

times so the seconds are flashing.

E button

D button three

(2 seconds)

City Code

(3 times)

3. Press the

• : 1.5 seconds

4. When the setting is the

• The display also will exit the

A button to

toggle the display illumination between 1.5 seconds and 2.5 seconds.

: 2.5 seconds

way you want, press the

E button to exit the

setting screen.

setting screen automatically if you do not perform any operation for about two or three minutes.

1.5 Seconds

2.5 Seconds

Operation Guide 2891

How a Radio-controlled Watch Works

What is a radio-controlled watch?

Your radio-controlled watch is designed to receive a time calibration signal that contains standard time data, and adjust its current time setting accordingly.

Signal is received by

Tr ansmitter

Cesium

atomic clock

After the watch receives the Standard Time signal, it performs internal calculations to determine the current time. Because of this, there may be an error of up to one second in the displayed time.

Long-wave time calibration signal

Signal data

Time data

Internally

Watch

built-in antenna.

Decode

Watch decodes received data and converts it to time data.

Time is adjusted according to time data.

Receiving the Calibration Signal

There are two methods you can use to receive the time calibration signal.

• Auto receive (Reception is performed automatically at midnight, 1:00, 2:00, 3:00, and 4:00 each morning.)

•

Manual receive (You initiate reception using a button operation.)

• Once auto receive is successful on a particular day, the auto receive operation for subsequent times are not performed for that day.

•

If reception is not successful for any of the normal auto receive operations shown above, auto receive is performed one more time at 5:00 a.m.

• The watch is set up for auto receive at the factory, so all you need to do is to place it in a location that allows good reception each night.

❚

To position the watch for optimum reception

Remove the watch from your wrist and place it somewhere so its top (12 o’clock, where the antenna is located) is facing approximately in the direction of the signal transmitter. Keep it away from metal objects.

Resin Band

Metal Band

• Orienting the watch so it is sideways to the transmitter makes it more difficult to receive the signal.

• Do not move the watch while it is receiving the calibration signal.

Calibration Signal

• The Japanese calibration signal (Call Sign: JJY) is maintained by the National Institute of Information and Communications Technology (NICT). It is transmitted 24 hours a day from the Mt. Otakadoya transmitter (40kHz) located in Tamura-gun, Fukushima Prefecture, and from the Mt. Hagane transmitter (60kHz) located on the border between Saga Prefecture and Fukuoka Prefecture.

Though the calibration signal normally is transmitted 24 hours a day, transmission may be interrupted occasionally due to maintenance, lightning, etc.

Time Required for Reception

Signal reception takes anywhere from about two to seven minutes.

•

Under certain conditions, signal reception can take as long as 14 minutes.

• See “Configuring Auto Receive Settings” for more information about auto receive.

❚

To perform manual receive

1. In the Timekeeping Mode, press the

times to enter the Receive Mode.

C button.

C button

2. Hold down the

for about two seconds.

• The watch will beep and reception will start. The display will flash and the receive icon ( ) will start to cycle through its numbers.

❚

To interrupt reception

Press the

• All other buttons besides C are disabled during signal reception.

When reception is successful

The watch terminates reception and adjusts the current time. Next it beeps and then displays the date and time the adjustment was performed.

• The “ ” icon (with all numbered segments visible) on the display also indicates successful signal reception.

When reception fails

The watch does not adjust its current time setting and displays “ERR” when signal reception is unsuccessful for some reason.

•

The display will return to the normal timekeeping screen automatically if you do not perform any operation for about one or two minutes.

D button six

(2 seconds)

Reception Ranges

With this setting, the watch automatically selects either the Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal (60kHz), whichever is strongest.

1000km

Receive Icon

500km

1000km

Mt. Otakadoya

(40kHz)

Transmitter Location

Mt. Hagane

(60kHz)

• Under optimum conditions, the calibration signal should be receivable up to 1,000 kilometers from the transmitter. Note that the wave is relatively weak at distances greater than 500km, so reception may be poor at long distances.

• Geographic contours, nearby buildings, the season, the time of day, can even make reception impossible even when you are within range of the transmitter.

• Best reception is possible late at night.

500km

Receive Icon

The receive indicator cycles from “Unstable” through “Stable” as shown below while reception is in progress. How far it cycles depends on the signal strength. Keep the watch in a location where reception is stable while reception is in progress.

Unstable Stable

• Even under optimum reception conditions, it can take about 10 seconds for reception to stabilize.

• Use the receive icon to check reception status and to determine the best location for signal reception.

• Note that weather, the time of day, surroundings, and other factors can all affect reception.

Location

Reception is difficult and may even be impossible in the locations described below. Avoid such locations when performing signal reception.

• You should think of your watch operating like a radio or TV when it is receiving the calibration signal.

Among or near buildings

Inside a vehicle (automobile, train, plane, etc.)

In a location where there is radio interference (construction site, airport, etc.)

If you are experiencing problems with reception, move away from the types of locations described above to a location with better reception, and try again.

❚

To view the last reception date and time

In the Timekeeping Mode, press the enter the Receive Mode.

• This displays the date and time when signal reception was last successful, and the current time and date were last adjusted.

• To return to the Timekeeping Mode, press the D button again.

• The display will return to the normal timekeeping screen

automatically if you do not perform any operation for about one or two minutes.

Reception Time

(6 times)

Near high-voltage lines

Next to a household appliance or office equipment (TV, speaker, fax, computer, cell phone, etc.)

Near mountains

D button six times to

Reception Date

Operation Guide 2891

Configuring Auto Receive Settings

Use the procedure below to turn auto calibration signal reception on and off.

• The following is the procedure for configuring auto receive settings when TYO (Tokyo) is selected as the Home City.

1. In the Timekeeping Mode,

2. Hold down the

press the

D button six

times to display the last reception date and time.

E button

for about two seconds until the current On/OFF setting starts to flash on the display. This is the setting screen.

(6 times)

(2 seconds)

3. Press the

4. When the setting is the

• Press the D button to return

• The display also will exit the setting screen automatically if

C button to

toggle the setting between On and OFF.

way you want, press the

E button to exit the

setting screen and return to the reception date and time screen.

to the Timekeeping Mode.

you do not perform any operation for about two or three minutes.

Troubleshooting

The watch cannot receive the time calibration signal.

• Is the signal being transmitted? Though the time data of the Japanese calibration signal (Call Sign: JJY) is maintained by the Japan Standard Time Group of the National Institute of Information and Communications Technology (NICT), it may sometimes be interrupted for periodic maintenance work, or because of lightning or other problems.

• Are you within the reception range of a transmitter? See “Reception Ranges” for information about areas where the watch can receive the signal.

• Is there something in the immediate area that may be interfering with reception? Even if you are within the reception range of a transmitter, objects between you and the transmitter or electrical noise can interfere with reception. Avoid such areas during signal reception. See “Location” for more information.

• Do you have the correct Home City code selected? Signal reception is not performed when the Home City setting is any city code other than TYO (Tokyo). For details about setting the correct Home City, see “To configure Home City settings”.

• Is auto receive turned off? Use the procedure under “Configuring Auto Receive Settings” to turn on auto receive.

• Barometric pressure readings (at the top of each even-numbered hour) take precedence over auto receive. For hours when both are scheduled, auto receive is performed about one minute past the top of the hour.

• Is the watch in any mode other than the Timekeeping Mode or World Time Mode during the auto receive times (midnight, 1:00 a.m., 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m.)? Auto receive is performed only when the watch is in the Timekeeping Mode or World Time Mode. It is not performed if the watch is in any other mode.

Time calibration signal reception is successful, but the hourly time signal and current time are slightly off.

• After the watch receives the time calibration signal, it performs an internal decoding process before updating its time setting. Because of this, the time setting may be slightly off (within one second).

Time calibration signal reception is successful, but the current time is one hour fast.

• Do you have summer time (DST) turned on? Use the procedure under “To configure Home City settings” to change the summer time setting to OFF.

Time calibration signal reception is successful, but the current time setting is wrong.

• Is TYO (Tokyo) selected for your Home City? For details about setting the correct Home City, see “To configure Home City settings”.

Can you configure auto receive settings?

• Auto receive settings cannot be configured when the Home City setting is any city code other than TYO (Tokyo). For details about setting the correct Home City, see “To configure Home City settings”.

When the time zone setting is TYO

• On

Selecting this setting turns on auto receive and auto transmitter selection. The watch automatically selects either the Otakadoya Mountain signal (40kHz) or the Hagane Mountain signal (60kHz), whichever is strongest.

• OFF

Selecting this setting turns off auto receive and auto transmitter selection.

When is auto receive performed?

• Auto receive is performed in the middle of the night, when reception conditions are best. Before going to bed at night, place the watch near a window, with 12 o’clock facing in the general direction of the transmitter.

How can I view the last reception date and time?

• In the Timekeeping Mode, press the D button (lower left) six times to enter the Receive Mode. This will display the date and time that the time calibration signal was last received successfully. To return to the Timekeeping Mode, press the D button again.

How can I perform manual receive?

• In the Receive Mode, hold down the C button (lower right) for about two seconds. The watch will beep to indicate that manual receive has started. Place it near a window, with 12 o’clock facing in the general direction of the transmitter.

Calibration Signal Reception Precautions

• Auto receive can be performed while the watch is in the Timekeeping Mode or World Time Mode only.

• Signal reception is not possible when any one of the following conditions exists.

• Timer operation in progress

• Battery at Level 3 or Level 4

• Recover indicator (RECOV) displayed

• While altitude recording is being performed (Manual signal

reception can still be performed.)

• Operating any button while auto receive is in progress will cause the watch to beep and then exit the receive operation.

• Make sure you are within the range of the calibration signal transmitter before performing the reception operation. Remember that geographic contours, nearby buildings, the season, the time of day, can even make reception impossible even when you are within range of the transmitter.

• Proper reception may be impossible if there is something blocking the signal. If reception is unsuccessful, try again.

• This watch is designed to adjust its current time setting in accordance with the calibration signal transmitted in Japan only. Note that you will need to make your own adjustments when using this watch outside of Japan, or in any area that is outside the range of one of the receivable time calibration signal transmitters.

• When the watch is unable to adjust its time signal using the calibration signal for some reason, timekeeping accuracy is within

±15 seconds per month.

• Strong electrostatic charge can cause timekeeping error.

• Signal reception is cancelled if an alert operation is starts while it

is being performed.

• The watch’s calendar shows dates up to the year 2099. Attempting a receive operation after that causes an error.

• If you cannot receive the calibration signal or if the current time setting is incorrect after signal reception, check the current setup of the watch.

• The following are the watch’s factory default settings, which are

configured automatically whenever you have the battery of the watch replaced.

Auto Receive

Home City

Summer Time

Tokyo

Auto (according to signal data)

Operation Guide 2891

Taking Direction Readings

Your watch uses a built-in magnetic sensor to detect and display direction. You can use displayed data to determine the direction to an objective or your current bearing.

• If you have reason to suspect that direction readings are not correct, you can calibrate the direction sensor using the procedure under “Calibrating the Direction Sensor”.

❚

To take a direction reading

In the Timekeeping Mode, Pressure/Temperature Mode, or Altitude Mode, orient the watch so it is level (either on your wrist or off your wrist).

Pointing 12 o’clock in the direction you want to read, press

the

A button.

When 12 o’clock is

()

pointing northwest

Direction you want to read

West North

Compass

Direction Indication in Degrees

The direction indicated by the watch is accurate up to ±11 degrees. Example: When 12 o’clock is pointing

South

northwest Northwest (315o) = 304o to 326

Inside a motor vehicle or indoors (ferro-concrete structures, in particular)

• Accurate direction readings are not possible under these conditions.

Automobiles

Trains

• Performing 2-point calibration makes it possible to obtain

relatively accurate direction readings while in a motor vehicle or any other vehicle that can freely change direction. See “To perform 2-point calibration” and “Using the Compass in an Automobile” for more information.

Flashes during direction reading

East

Interpreting the Degree Value

Boats, aircraft

Indoors (steel is magnetic)

About two seconds after you press the A button , the watch enters the Compass Mode and displays the direction angle and graphic pointers. Taking a direction reading with the digital compass causes readings to be taken each second for 20 seconds.

After the direction reading operation is complete, you can press the A button again to restart it.

• An alarm or other beeper operation or turning on illumination by pressing the L button while a direction reading operation is in progress will stop it momentarily. The direction reading operation will resume when the beeper or light operation is complete.

• Taking a direction reading in a location where terrestrial magnetism is weak can affect direction readings.

• The full auto light switch is disabled during the 20 seconds required to take a direction reading with the digital compass.

• After the direction reading operation is complete, press the D button to return to the Timekeeping Mode.

If you do not perform any button operation for two or three minutes while in the Compass Mode, the watch will return to the Timekeeping Mode automatically.

❚

Storage location

Keep the watch away from magnets and any other sources of strong magnetism.

Permanent magnets (magnetic necklaces, bag clasps, etc.)

Electric household appliances (TV, speakers, etc.)

If the watch is exposed to magnetism

Exposing the watch to magnetism can affect the accuracy of its digital compass readings. If this happens, perform 2-point calibration (“To perform 2-point calibration”) to correct the readings.

• If you are unsure if you watch has been exposed to magnetism, perform 2-point calibration before taking a direction reading.

• Exposing the watch to extremely strong magnetism can make correct direction readings impossible even after 2-point calibration, or can cause display of abnormal values during direction readings.

Digital Compass Precautions

Note the following points whenever taking a direction reading with the digital compass.

❚

When taking a reading

Orient the watch so it is level, either on your wrist of off your wrist.

• Orienting the watch at an angle can cause large measurement error.

❚

Location

The wrong type of location can cause large measurement error. Avoid the following types of locations when taking a direction reading with the digital compass.

Near objects that generate strong magnetic force

• Move as far away from magnetic items as possible.

Permanent magnets (magnetic necklaces, etc.) Metal (steel columns, lockers, etc.)

Electric household appliances (TV, computer, speakers, etc.)

High-voltage power lines

Calibrating the Direction Sensor

Perform one of the calibration operations described below whenever you think that the watch’s direction readings are not correct for some reason.

2-Point Calibration

Use 2-point calibration to calibrate the direction sensor to suit a particular magnetic environment.

Before using the watch inside of an automobile, for example, perform 2-point calibration to correct for the effects of magnetism that may be present in the vehicle.

• The watch will exit the flashing digital compass screen automatically if you do not perform any operation for two or three minutes.

Tips for 2-Point Calibration

The more carefully you perform 2-point calibration, the more accurate subsequent direction readings will be. If the environment where you are using the watch changes, after you have not used the watch for some time, or any other time you feel that direction readings are not correct, perform 2-point calibration again.

• Perform 2-point calibration in the location and under the conditions where you will be using the watch to take direction readings. If you plan to take readings on an open field, perform calibration there, if you plan to take readings in a motor vehicle, perform calibration in the vehicle.

• You can use any two directions when performing 2-point calibration. Just make sure that the second point is exactly 180 degrees opposite from the first point.

• When performing 2-point calibration inside an automobile or boat, turn the automobile or boat around 180 degrees when changing direction.

Northerly Calibration

With northerly calibration, you “teach” the direction sensor the northerly direction (determined using another compass, etc.) Northerly calibration also can be used to calibrate the direction sensor to correct the declination angle and indicate true north, rather than magnetic north.

• If you want to perform both 2-point calibration and northerly calibration, perform 2-point calibration first and then northerly calibration. Performing 2-point calibration automatically cancels the last northerly calibration setting.

❚

To perform 2-point calibration

1. In the Timekeeping Mode,

2. Hold down the

• This is the 2-point calibration

press the

A button to

enter the Compass Mode.

E button

for about two seconds until “–1–” appears on the display

screen.

Direction in Degrees

(2 seconds)

Compass Mode

Operation Guide 2891

3. While “–1–” is on the

display, hold the watch so it is horizontal and press

the

A button to calibrate

the first direction.

• When calibration is successful, “OK” will appear on the display followed by “–2–” to indicate calibration of the second direction.

• Do not move the watch while calibration of either direction is being performed.

• “– – –” is on the display while calibration of a direction is being performed. If “– – –” does not appear when you press the A button, wait for about three seconds and then press the A button again.

4. While “–2–” is on the

display, rotate the watch so it is pointing 180 degrees opposite of the first direction, and then

press the

A button to

calibrate the second direction.

• When calibration is successful, the watch will exit the calibration screen and return to the compass screen.

Rotate 180 degrees

❚

To perform northerly calibration

1. In the Timekeeping Mode,

2. Hold down the

• This is the northerly

press the

A button to

enter the Compass Mode.

E button

for about two seconds until “–1–” appears on the display. Next, press the button so “–N–” is displayed.

calibration screen.

Direction in Degrees

(2 seconds)

Compass Mode

3. Holding the watch so it is

horizontal, point 12 o’clock north and then

press the

A button.

• When calibration is successful, “OK” will appear on the display and the watch will return to the compass screen.

If “ERR” appears

“ERR” indicates that an abnormal value was detected because the watch was moved during calibration or due to some other reason. If this happens, perform the calibration procedure again from the beginning.

• Take care that you do not move the watch while calibration

is being performed.

• If “ERR” or “– – –” (abnormal value detected) keeps

appearing when you try to perform calibration, it could mean that there is a strong source of magnetism close by. If this happens, move to another location and try performing calibration again.

North

How to use the digital compass

❚

Determining Your Current Location

You can find out your current location by using the compass to read the directions to two known landmarks, and then determining where two lines, drawn in accordance with the directions, intersect on a map.

1. Find the two landmarks, read the directions to them, and record

the readings in memory.

2. Recall the readings and draw lines on a map from the two

landmarks. Your current location will be where the two lines intersect.

❚

Making Your Way to an Objective

When you cannot see the objective

1. Find the objective on a map.

Example: When the objective

is northeast (NE) from your current location

2. Use the watch to perform occasional direction readings as you

make your way towards your objective.

This screen indicates that the direction to your objective is at 3 o’clock.

Objective

Current location

Northwest

North

Northeast

When you can see the objective

Point 12 o’clock at the objective and then perform a direction reading operation. This will tell you the direction to the objective.

Now you can perform occasional readings to make sure you are headed in the right direction, even if you can no longer see your objective.

❚

Memorizing a Location

To memorize a specific location on the ocean, take readings on the directions to two fixed distant landmarks. After that, you will be able return to that location by taking readings of the directions to the same two landmarks.

Favorite fishing point

Operation Guide 2891

Digital Compass Reference

❚

What is a digital compass?

The Earth is like a giant magnet with a north pole and a south pole. The magnetism of the Earth is called “terrestrial magnetism”. The magnetic sensor of your watch is a magnetic compass that detects terrestrial magnetism to determine direction.

Earth

❚

Magnetic compass north reading

The northerly direction detected by a magnetic compass is “magnetic north,” which is different from “true north”. Depending on your location on the globe, the magnetic north indicated on a compass is actually east or west of true north. The angle that is formed by the difference between magnetic north and true north is called the “declination”. The magnetic north pole is located north of Canada, while the magnetic south pole is located south of Australia. In Japan, the declination angle is 5 degrees (around Kagoshima) to about 9 degrees (around Hokkaido) west.

Magnetic north pole

Magnetic south pole

Digital Compass Troubleshooting

Proper direction readings will not be possible in areas exposed to unstable magnetism or areas where something is interfering with terrestrial magnetism. Also note that accurate direction readings are not possible if you do not perform the required operations correctly. Check the following points if you suspect that direction readings are wrong for some reason.

❚

Using the Compass in an Automobile

The entire body of a vehicle may be magnetized, which will make proper direction readings impossible. By performing 2-point calibration, however, you can use the compass to take approximate readings while riding in an automobile.

• See “To perform 2-point calibration” for information about how to perform 2-point calibration.

Important!

Never try to perform 2-point calibration while driving. Doing so is very dangerous and creates the risk of serious accident.

1. First, park the vehicle in a

safe area where you can turn it around 180 degrees.

3. Turn the vehicle around 180 degrees, and then calibrate the

second point.

2. At a location inside the

vehicle that is away from its equipment and body, use the 2-point calibration screen to calibrate the first point.

Precautions During Calibration

• When performing 2-point calibration, perform calibration of the first point and the second point in the same location.

• Keep as far away from possible from the vehicle’s equipment, body, and other possible sources of magnetism.

• Depending on the condition of the magnetism of the vehicle, proper direction readings may not be possible.

• Magnetism differs from vehicle to vehicle. Be sure to perform 2-point calibration whenever you change from one vehicle to another.

• You should also perform 2-point calibration again if you change position (from the driver’s seat to the back seat, etc.) within the same vehicle.

❚

The displayed direction is wrong.

Cause 1: You did not perform 2-point calibration. Remedy: Correctly perform 2-point calibration.

Cause 2: There is source of strong magnetism nearby. Remedy: If any of the following objects are nearby, move away

and try taking a direction reading again.

Electrical equipment, large bridge, structure made with steel columns, electrical train wires, automotive vehicle, boat, etc.

Cause 3: You are in an area where magnetism is fluctuating. Remedy: Move away from the objects described above.

❚

The watch shows different direction readings at the same location.

Cause: Unstable magnetism caused by high-voltage lines

nearby.

Remedy: Change to a different location and try again.

❚

Correct direction readings are not possible indoors.

Cause: A nearby TV, computer, or other device is disturbing the

directionality of the magnetism.

Remedy: Change to another location or move outside and try

again. Note that correct direction readings are not possible inside of a ferro-concrete structure.

Operation Guide 2891

Taking Pressure and Temperature Readings

❚

To take pressure and temperature readings

In the Timekeeping Mode, Compass Mode, or Altitude Mode, press the B button to enter the Pressure/Temperature Mode. The display will show the barometric pressure and pressure tendency graph, and temperature.

Pressure/Temperature Mode Display

Pressure Tendency Graph

Pressure

• The barometric pressure can take up to four or five seconds to appear after you enter the Pressure/Temperature Mode.

Pressure Differential Graph

Temperature

Barometric Pressure and Temperature Readings

After you enter the Pressure/Temperature Mode, the watch takes readings every five seconds for three minutes. After that, the watch will take a reading whenever you press the B button.

• When measuring outdoor temperatures, remove the watch from your wrist and place it in a location where its readings will not affected by body temperature, sweat (water droplets), direct sunlight, etc.

Interpreting the Pressure Differential Graphic

The pressure differential graphic shows the relative difference between the barometric pressure reading taken when you enter the Pressure/Temperature Mode and the last of the readings the watch takes every two hours.

• The graphic shows changes up to ±15hPa, in 1hPa units.

• You can turn display of the pressure differential graphic off, if you

want.

Example 1: Temperature differential = –5hPa

+15hPa

Data used for comparison

±0hPa

Pressure Differential Graphic (–5hPa)

–15hPa

Example 2: Temperature differential = +15hPa

Pressure Differential Graphic (+15hPa)

Barometric Pressure

Measurement Range: 260hPa to 1,100hPa Measurement Unit: 1hPa

• The display will show “– – – –” whenever a measured value is outside the measurement range.

Temperature

Measurement Range: –10.0oC to 60.0oC Measurement Unit: 0.1oC

• For a temperature of –10oC, the displayed temperature shows –10oC (not –10.0oC).

• The display will show “– – –” whenever a measured value is outside the measurement range.

Pressure Tendency Graph

The pressure tendency graph shows the results of barometric pressure readings that are taken automatically every two hours.

If you do not perform any button operation for two or three minutes while in the Pressure/Temperature Mode, the watch will return to the Timekeeping Mode automatically.

In excess of ±15hPa

Graphic displayed at 9 o’clock

Indicator appears at 9 o’clock

• The graphic does not appear when the barometric pressure reading is outside the measurement range (260 to 1100hPa).

Interpreting the Pressure Tendency Graph

The pressure tendency graph shows 30 hours (16 readings) of barometric pressure readings that are taken automatically by the watch.

• A plot on the graph indicates the relative change from one reading to the next. Each level represents a relative change of 1hPa.

The pressure tendency graph is mainly for tracing changes in barometric pressure, which can be used to predict upcoming weather.

A plot may be skipped because it is outside the range of the currently displayed graph when the change between readings is extremely large due to movement between different altitudes, an extreme change in weather, an extreme change in temperature, etc. If the next plot is near the reading that is outside the range of the current graph, the graph will shift to show both of the plots.

Not visible

❚

To turn the pressure differential graphic on and off

1. In the Pressure/

Temperature Mode, hold

down the

E button for

about two seconds until “SET” appears at the top of the display.

• After about four or five seconds, the barometric pressure value will appear in the middle of the display.

2. Press the

D button twice

to move the flashing to the pressure differential graphic On/OFF setting.

Pressure

(2 seconds)

(Twice)

Te mperature

Example Pressure Tendency Graphs

The following examples show how you can predict upcoming weather conditions based on the pressure tendency graph. When using the pressure tendency graph, remember that changes in your altitude and environmental conditions can affect air pressure and show up as changes on the pressure tendency graph.

• Continual rise in barometric pressure

Rising barometric pressure indicates that upcoming weather will be fair.

• Continual drop in barometric pressure

Falling barometric pressure indicates that upcoming weather will deteriorate.

• Temperature and humidity can affect pressure graph contents. Because of this, pressure tendency graph contents are intended for reference only.

• The watch will not take a barometric pressure reading if a measurement time arrives while the barometric pressure sensor is malfunctioning, while rechargeable battery power is low, or while the watch is in the function sleep state.

3. Press the

4. Press the

• The watch automatically exits the pressure differential graphic on/ off setting screen if you do not perform any operation for about two or three minutes.

C button to

toggle the setting on (display graphic) and off (do not display graphic).

E button to exit

the setting screen and return to the Pressure/ Temperature Mode screen.

Operation Guide 2891

Calibrating the Pressure Sensor

The barometric pressure sensor of the watch is calibrated at the factory, and further calibration normally is not required. Perform the following operation only when you find that a pressure reading taken with another accurate instrument is very different from the reading produced by your watch. Take care that you perform the calibration operation correctly. Using the wrong value can make it impossible to measure barometric pressure correctly.

1. In the Pressure/

Temperature Mode, hold

down the

E button for

about two seconds until “OFF” or the current temperature appears at the bottom of the display.

• It will take four to five seconds for the barometric pressure value to appear.

2. Press the

D button so

“OFF” or the barometric pressure value is flashing.

Pressure

(2 seconds)

Te mperature

3. Use the

• Each press of the C button

• Holding down either button

• Pressing the C and A

4. After the setting is the

• The watch automatically exits

C (+) and

buttons to adjust the barometric pressure value.

or A button changes the displayed value by 1hPa.

scrolls the setting at high speed.

buttons at the same time returns to the factory default setting, which is indicated by “OFF”.

way you want, press the

E button to return to the

Pressure/Temperature Mode screen.

the pressure sensor calibration screen if you do not perform any operation for about two or three minutes.

A (–)

Barometric Pressure Primer

❚

Ways you can use the pressure tendency graph

Example 1: Hiking

You can take barometric pressure readings from morning to night the day before you plan to go hiking or mountain climbing, and get an idea of what the weather will be like.

Example 2: Golf

Changes in barometric pressure can alert you to an approaching thunderstorm and keep you safe.

Calibrating the Temperature Sensor

The temperature sensor is calibrated at the factory, and further calibration normally is not required. Perform the following operation only when you find that a temperature reading taken with another accurate instrument is very different from the reading produced by your watch. Take care that you perform the calibration operation correctly. Using the wrong value can make it impossible to measure temperatures correctly.

(–)

(+)

1. In the Pressure/

Temperature Mode, hold

down the

E button for

about two seconds until “OFF” or the current temperature appears at the bottom of the display.

• It will take four to five seconds for the barometric pressure value to appear.

2. Use the

• Each press of the C button

• Holding down either button

• Pressing the C and A buttons at the same time returns to

C (+) and

buttons to adjust the temperature value.

or A button changes the displayed value by 0.1oC.

scrolls the setting at high speed.

the factory default setting, which is indicated by “OFF”.

A (–)

Pressure

(2 seconds)

Te mperature

3. After the setting is the way

you want, press the button to return to the Pressure/Temperature Mode screen.

• The watch automatically exits the temperature sensor calibration screen if you do not perform any operation for about two or three minutes.

(–)

(+)

❚

Predict weather based on changes in barometric pressure.

Barometric pressure changes along with atmospheric movements. Because of this, you can predict upcoming weather by monitoring changes in barometric pressure. If barometric pressure is rising ➔ Weather conditions should improve If barometric pressure is falling ➔ Weather conditions should deteriorate

Why this is true

A rise or fall in barometric pressure produces changes in the weather as shown to the right.

❚

Atmospheric Pressure

The barometric pressure values reported on TV, in newspapers, and in other media are actual readings taken on mountains, plains, and the sea, which are converted to a mean sea level pressure value. They are not the barometric pressure values for mountain areas. This makes it possible to compare barometric pressure values regardless of location. The process of correcting barometric pressure to a fixed altitude (sea level) is called “reduction to sea level”.

High Pressure Downward flowing air dissipates clouds and clears the skies.

Sky

Downward Air Flow

High Pressure

Ground

Low Pressure

Upward flowing air produces clouds, which cause rain.

Sky

Upward Air Flow

Low Pressure

Clouds

Ground

Operation Guide 2891

Taking Altitude Readings

The watch uses International Standard Atmosphere (ISA) values that are defined by the International Civil Aviation Organization (ICAO) to convert readings taken by its built-in pressure sensor to relative altitude values.

Important!

When taking altitude readings, make sure that the temperature of the watch is kept as stable as possible, and is not affected by changes in temperature. You can do this by keeping the watch in direct contact with your skin.

• Variation in the watch’s temperature due to changes in air temperature or altitude can cause altitude reading error.

What can I do with altitude readings?

Example 1: Find out how high you have hiked or climbed.

Start an altitude reading operation at the foot of the mountain as you start off, and find out how many meters you climbed when you get to the top.

Example 2: Determine how high above sea level your house is.

When you travel from your home to the beach, you can measure the relative change in altitude and determine how high your home is above sea level.

Example 3: Measure how tall a building is.

Set the altitude to zero on the first floor of a building, and then go up to the top floor to measure how tall it is.

• Note that pressurizing and ventilation equipment inside of some buildings can cause errors in altitude readings.

❚

To take an altitude reading

In the Timekeeping Mode, Compass Mode, or Pressure/Temperature Mode, press the C button to enter the Altitude Mode. The watch will measure your current altitude and display it.

Altitude Mode Display

Altitude Graph ACT Indicator

Altitude

Current Time

• The altitude can take up to four or five seconds to appear after you enter the Altitude Mode.

Altitude Tendency Graph

The altitude tendency graph shows past altitude values measured in the Altitude Mode.

• Each plot on the graph represents 10 meters.

Altitude Readings

After you enter the Altitude Mode, the watch takes readings every five seconds for three minutes (ACT indicator flashing). After that, readings are taken every two minutes (ACT indicator displayed, without flashing).

Current altitude (flashing)

Altitude

Display Range: –10,000 to 10,000 meters Display Unit: 5 meters Measurement Range: –700 to 10,000 meters Measurement Unit: 5 meters

• Though the display range covers 20,000 meters (from –10,000 to 10,000), the measurement range covers only 10,700 meters (–700 to 10,000).

• The altitude values produced by the watch are relative altitude values. This means they are relative to a reference altitude value that you preset. Even when you are at a location that is above sea level, the watch may display a negative value (indicating you are currently lower than your reference value).

• The display shows “– – –” when the measured value is outside the measurement range or display range.

If you do not perform any button operation for nine or ten minutes while in the Altitude Mode, the watch will return to the Timekeeping Mode automatically.

Interpreting the Altitude Differential Graphic

The altitude differential graphic shows the relative difference between consecutive values measured in the Altitude Mode, so you can monitor changes as you ascend or descend.

• The graphic shows changes up to

• You can turn display of the altitude differential graphic off, if you

want.

Example 1: Altitude Differential: –10 meters

Example 2: Altitude Differential: +15 meters

Altitude Differential Graphic (+15 meters)

±15 meters in 5-meter units.

+15m

±0m

Altitude Differential Graphic (–10 meters)

–15m

In excess of ±15 meters

Graphic displayed at 9 o’clock

Indicator appears at 9 o’clock

❚

To turn the altitude differential graphic on and off

1. In the Altitude Mode, hold

• After about four or five

2. Press the

down the

E button for

about two seconds until “SET” appears at the top of the display.

seconds, the altitude value will appear in the middle of the display.

D button twice

to move the flashing to the altitude differential

n/OFF setting.

graphic O

(2 seconds)

(Twice)

3. Press the

4. Press the

• The watch automatically exits the altitude differential graphic on/

off setting screen if you do not perform any operation for about two or three minutes.

C button to

toggle the setting on (display graphic) and off (do not display graphic).

E button to exit

the setting screen and return to the Altitude Mode screen.

Reference altitude

Operation Guide 2891

Using the Altitude Alarm

The altitude alarm sounds for five seconds when the measured altitude value is in excess of a preset target altitude. Note that the altitude alarm is enabled in the Altitude Mode only.

Example: If the target altitude value is 130 meters, the alarm will sound when either of the following conditions is met.

• When you reach 130 meters when ascending from 0 meters.

• When you reach 130 meters when descending from 300 meters.

❚

To set the target altitude

1. In the Altitude Mode, hold

• After about four or five

2. Press the

down the

E button for

about two seconds until “SET” appears at the top of the display.

seconds, the altitude value will appear in the middle of the display.

D button to

move the flashing to the target altitude. At this time OFF or On will appear on the display.

(2 seconds)

Target Altitude

3. Use the

• Each press of the C button

• Holding down either button

• Press the C and A buttons

• You can set a target altitude in

C (+) and

buttons to adjust the target altitude value.

or A button changes the displayed value by 5 meters.

scrolls the setting at high speed.

at the same time resets the target altitude to “0 m”.

the range of –10,000 to 10,000m.

A (–)

（−）

（＋）

Altitude Memory

Altitude memory stores up to 40 altitude records when you perform altitude recording. Each record includes the date, time, and altitude. Other items stored in memory are high altitude, low altitude, total ascent, total descent, and relative altitude.

• Altitude recording takes readings every 15 minutes (00, 15, 30, 45 minutes of each hour) and stores them in memory.

• Starting a new altitude recording operation automatically clears any existing altitude records in memory to make room for the new readings.

• The watch stops altitude recording automatically after the 40th record is stored.

• Altitude recording continues to be performed even if you change to another mode. The “REC” indicator flashes on the display while altitude

recording is in progress.

High altitude, low altitude, total ascent, and total descent values over time can also be accumulated in a separate memory area.

• The total ascent and total descent values are continually accumulated in the range of 0 to 99,995 meters.

❚

To toggle the altitude alarm on and off

1. While the target altitude

value is flashing, press

the

B button to toggle the

altitude alarm on ( displayed) and off ( not displayed).

• Note that the altitude alarm can be turned on or off only while the target altitude is flashing.

2. After the setting is the way

you want, press the button to return to the Altitude Mode screen.

• The watch automatically exits the target altitude setting screen if you do not perform any operation for about two or three minutes.

❚

To stop the alarm beeper

Press any button.

❚

To display the relative altitude screen

While altitude recording is in progress, press the E button to toggle between the altitude screen and the relative altitude screen.

Altitude Screen Relative Altitude Screen

Altitude

Altitude Alarm On Indicator

Relative Altitude

High Altitude

Start Point

Low Altitude

High Altitude: Highest altitude attained during altitude

Low Altitude: Lowest altitude attained during altitude readings

Total Ascent: Total of ascents (A + C) Total Descent: Total of ascents (B + D) Relative Altitude:Difference between start point and current

• High altitude, low altitude, total ascent, total descent, and relative altitude values are updated when altitude readings are taken every five seconds during the first three minutes after entering the Altitude Mode, and the subsequent readings taken every two minutes.

readings stored in memory

stored in memory

altitude (Point E in the case of the stop point)

Stop point

❚

To perform altitude recording

1. Hold down the

for two seconds until the watch beeps.

• This will store the current altitude, along with the current time and date in memory.

• “REC” will also start flashing on the display.

2. To stop altitude recording,

hold down the for two seconds until the watch beeps.

• This will store the current altitude and time, and then terminate altitude recording.

C button

(2 seconds)

Current Time

• The relative altitude is the differential between your current altitude and the altitude when you started altitude recording.

• The altitude screen appears first whenever you enter the Altitude Mode from another mode.

REL Indicator

Operation Guide 2891

Viewing Altitude Memory Records

You can use the Recall Mode to view the records that are stored in memory in the Altitude Mode.

• In the Timekeeping Mode, press the D button once to enter to the Recall Mode.

❚

To view altitude memory records

In the Recall Mode, use the C (forward) and A (back) buttons to scroll through records in altitude memory.

• Holding down either button scrolls at high speed.

Time

Newest Data

Altitude

1-second interval

Month/Day

Total Ascent

High Altitude

Low AltitudeTotal DescentRelative Altitude

Setting a Reference Altitude

Use the following procedure to set a reference altitude in accordance with a reading produced by another device or an altitude value obtained from a marker or other source.

Altitudes displayed by your watch can be affected by changes in atmospheric pressure and temperature, and by changes in temperature at different altitudes. Because of this, it is always a good idea to use the procedure below to update the reference altitude value in accordance with altitude values indicated on markers along your route.

1. In the Altitude Mode, hold

• After about four or five

2. Use the

• Each press of the C button

down the

E button for

about two seconds until “SET” appears at the top of the display.

seconds, the altitude value will appear at the bottom of the display.

C (+) and

buttons to adjust the reference altitude value.

or A button changes the displayed value by 5 meters.

A (–)

Reference Altitude

(2 seconds)

（−）

（＋）

• Holding down either button scrolls the setting at high speed.

• Pressing the C and A buttons at the same time returns to

the factory default setting, which is indicated by “OFF” for the reference altitude.

• The reference altitude can be set in a range of –10,000 meters to 10,000 meters.

3. After the setting is the way

you want, press the button to return to the Altitude Mode screen.

• The watch automatically exits the reference altitude setting screen if you do not perform any operation for about two or three minutes.

Cumulative Data

In the Recall Mode, each press of the B button toggles the display between the altitude record screen and the cumulative data screen.

Altitude Record Screen Cumulative Data Screen

When the cumulative data screen is displayed, use the C (forward) and A (back) buttons to scroll through the cumulative data.

• High altitude and low altitude are not cumulative values.

High Altitude

Total Ascent

Low Altitude

To tal Descent

If temperature reading accuracy is a priority...

If temperature accuracy is a priority, remove the watch from

your wrist so it is not affected by your body temperature.

• Note, however, that removing the watch from your wrist will make altitude readings more prone to being affected by changes in air temperature. Because of this, the chance of altitude measurement error increases slightly when the watch is removed from the wrist.

• After removing the watch from your wrist, it takes about 20 to 30 minutes before the temperature of the watch becomes the same as the air temperature.

❚

When you want to measure with either one a priority

If accurate altitude readings are a priority, try to keep

the temperature of the watch as stable as possible. Example: Keep the

watch on your wrist, etc.

If accurate temperature readings are a priority, keep the

watch from being affected by your body temperature. Example: Keep the

watch inside your bag, where it is not exposed to direct sunlight.

Clearing Cumulative Data Memory

Use the procedure below to clear the contents of cumulative data memory.

• Clearing cumulative data memory deletes high altitude, low altitude, total ascent, and total descent data.

1. In the Recall Mode, press

the

B button to switch to

the cumulative data screen, and then hold

down the

E button.

2. After “CLR” appears on

the display, keep the button depressed for two more seconds until the watch beeps, indicating that cumulative data has been cleared.

Altitude Primer

❚

Relationship between Altitude, Barometric Pressure, and Temperature

Generally, both barometric pressure and temperature are lower, the greater the altitude from sea level. This means you can determine your altitude if you know the current air temperature.

Your watch uses International Standard Atmosphere (ISA) data on the relationship between altitude and barometric pressure that is defined by the International Civil Aviation Organization (ICAO) to estimate your current altitude and displays a relative altitude value.

Altitude

4,000m

3,500m

3,000m

2,500m

2,000m

1,500m

1,000m

Approximate

500m

Pressure

8hPa per

616hPa

100 meters*

9hPa per

701hPa

100 meters*

10hPa per

795hPa

100 meters*

11hPa per

899hPa

100 meters*

1,013hPa

12hPa per 100 meters*

(International Standard Atmosphere data)

Temperature

–11

–4.5

2oC

8.5

15oC

6.5

C per 1,000 meters*

❚

Application: Obtaining an altitude reading with the watch that is close to the absolute altitude above sea level

The best way to obtain an altitude reading with the watch (relative altitude) that is close to the absolute altitude above sea level is to set altitude values obtained from markers provided at the seashore or along a mountain path as your reference altitude value. This should be done immediately before using the watch to take altitude readings.

• Note that daily fluctuations in atmospheric pressure affect altitude readings, so you should set the reference altitude just before you are ready to take readings.

Example: To set an indicated altitude of 400 meters

1. At Point A in the illustration, set the reference altitude to

above sea level as the reference altitude

400 meters, which is the absolute altitude above sea level indicated on a marker provided along the trail.

2. Take altitude readings from Point A to Point B.

3. If there is another absolute altitude marker at Point B,

update the reference altitude.

• Be sure to update the reference altitude at Point B if the value displayed by the watch is different from the absolute altitude indicated by the marker along the trail at Point B.

Point A

400

Point B

Operation Guide 2891

Altitude Reading Precautions

Readings that are close to the absolute altitude above sea level are not possible under the following conditions.

• During volatile weather conditions

• During sudden temperature changes

• When the watch is being subjected to strong impact

❚

Altitude Terminology

There are two different methods that can be used to express altitude.

Altitude above Sea Level

This is an absolute measurement of altitude above sea level.

Relative Altitude

This expresses the difference in altitude between two locations (altitude differential).

• Your watch measures relative altitude.

Absolute Altitude and Relative Altitude

Building Height: 130 meters Relative Altitude (Altitude Differential)

Sea

Roof is 230 meters above sea level. Altitude above Sea Level

❚

Altitude Reading Precautions

• Your watch converts barometric pressure readings into altitude values. Because of this, changes in local barometric pressure can cause different results for altitude readings taken in the same location.

Example: Even if you set zero for the reference altitude at ground level, a difference in atmospheric pressure can produce different altitude readings. If you set a reference altitude of zero at ground level on December 28 (fair, high barometric pressure of 1,030 hPa), the same location will show an altitude of 335 meters on December 31 (rain, low barometric pressure of 990 hPa).

Mountain Peak Height 500m

Altitude above Sea Level

600m

300m

100m

• Height of a building and mountain from ground level (relative altitude)

Building Height

Sea Level Barometric Pressure

12/28 12/31

1,030hPa

(Seal Level)

200m

990hPa

12/28 and 12/31 displayed altitude 12/28 <Mountain Height> 12/31

959hPa

12/28 <Building Height> 12/31

994hPa

12/28 <Ground Level> 12/31

1,018hPa0m978hPa

(Ground Level) 100 meters above sea level

500m

200m

921hPa

835m

955hPa

535m

335m

• Accurate readings are not possible when barometric pressure and temperature are fluctuating widely due to sudden and severe changes in the weather. Example: When you approach a low pressure area while

mountain climbing, the drop in pressure produces altitude readings that are higher than the actual

• To avoid the effect of sudden temperature changes on readings,

• Remember that the air inside of a commercial aircraft is

• This watch is designed to take altitude readings at preset

altitude.

wear the watch so it is in direct contact with your wrist while taking readings.

pressurized. Because of this, the readings produced by this watch will not match the altitude readings announced by the flight crew.

intervals. Never try to use it for altitude readings while engaged in the following types of sports, during which altitude can change very rapidly over a short time span. Example: Skydiving, hang gliding, paragliding, gyrocopter

flying, glider flying, etc.

Sensor Error Detection

The watch disables the sensor operation and displays the indicator described below whenever a sensor malfunctions or when faulty contact makes correct readings impossible.

When sensor malfunction occurs

• When a pressure sensor or direction sensor occurs, “ERR” flashes on the display for about two seconds and then readings stop.

• When sensor malfunction occurs, take your watch to your nearest CASIO Service Center to have it checked.

If “ERR” appears

If “ERR” appears while you are taking a pressure, altitude, temperature, or direction reading, try taking the reading again. If “ERR”

appears again, it probably means that the sensor is malfunctioning. Take your watch to the nearest CASIO Service Center to have it checked.

• If “ERR” disappears from the display right away, check, it could indicate the following.

2. Regardless of whether the current battery level is Level 2 or higher, the watch may determine that the current power level is not enough to

driver the sensor in the Compass, Pressure, or Altitude Mode. If this happens, “ERR” will appear on the display and the sensor will not take the reading.

• This does not indicate malfunction. In this case, normal operation should return after battery power recovers.

Altitude DirectionBarometric Pressure

Use the

D button to enter the Stopwatch Mode as shown

Using the Stopwatch

The stopwatch measures elapsed time in units of 1/100 second up to 9 hours, 59 minutes, 59.99 seconds (10 hours). When the maximum limit is reached, the elapsed time returns to zero automatically and timing continues from there.

❚

To use the stopwatch

In the Stopwatch Mode, press the the stopwatch.

1/100 second

Hour, Minute, Second

Current Time

• Pressing the A button while an elapsed time operation is being performed freezes the current time on the display and continues timing of the next split internally. This condition is indicated by the “SP” (split) indicator on the display.

• Changing to another mode while a split time is displayed

cancels the split time operation.

• Pressing the A button while timing is stopped resets the stopwatch.

C button to start and stop

(Split/Reset)

(Start/Stop)

under “Modes and Display Screens”.

❚

To perform elapsed time measurement

Start Stop Reset

Cumulative Time Measurement

Pressing the C button to restart the stopwatch without resetting it to all zeros causes the elapsed time measurement to resume from where it was last stopped.

❚

To perform split time measurement

Record Split Release Split ResetStopStart

Split Time Screen

❚

To time 1st and 2nd place finishers

Start

1st Finisher (Displays time of 1st finisher.)

2nd Finisher Displays time

of 2nd finisher.

Reset

Using the Timer

You can set the start time of the timer in units of one minute in the range of 1 to 60 minutes. The watch beeps for 5 seconds when the end of the countdown is reached. Turning on the watch’s auto repeat timer feature causes the countdown to restart from the start time whenever the end of the countdown is reached.

Timer Types

There are two different settings that you can use to configure the timer as describe below.

• Repeat Timer

With the Repeat Timer, the countdown stops, the original start time appears, and the watch beeps for 5 seconds when the end of the countdown is reached.

• The “ ” indicator appears on the display while the Repeat Timer is selected.

• Auto Repeat Timer

The Auto Repeat Time causes timing to restart from the start time when the end of the countdown is reached.

• The “ ” indicator appears on the display while the Auto Repeat Timer is selected.

• The countdown repeats up to 10 times, or until you stop it manually.

Operation Guide 2891

Use the

D button to enter the Timer Mode as shown under

“Modes and Display Screens”.

Timer Alarms

❚

Progress Beeper

When the progress beeper is turned on, the watch beeps at the top of minute 10, 5, 4, 3, 2, and 1 before the end of countdown is reached, and at second 50, 40, 30, 20, 10, 5, 4, 3, 2, and 1 of the final minute.

• If the timer start time is less than 10 minutes, the progress beeper beeps only for the minutes and seconds that are actually counted down.

• See “To turn the progress beeper on or off” for information about how to turn the progress beeper on and off. The “ ” indicator is on the display while the progress beeper is turned on.

❚

Time Up Alarm

The watch beeps for five seconds when the end of the countdown is reached.

• Pressing any button while the beeper is sounding stops it.

❚

To configure timer settings

1. While the current starting

time is displayed in the Timer Mode, hold down

the

E button for about

two seconds until the start to flash on the display. This is the setting screen.

(2 seconds)

2. Press the

• Holding down either button

C (+) and

buttons to change the minutes setting.

scrolls the setting at high speed.

A (–)

Minutes

3. Press the

4. Press the

(–)(–)

• The “ ” indicator appears

(+)(+)

5. When the setting is the way you want, press the

• The display also will exit the setting screen automatically if

D button to

change to the timer type setting.

C button to

toggle the timer type between repeat timer and auto repeat timer.

on the display while the Auto Repeat Timer is selected.

button to exit the setting screen and return to the timer mode screen.

you do not perform any operation for about two or three minutes.

Indicates auto repeat timer

❚

To turn the progress beeper on or off

In the Timer Mode (countdown can be running or stopped),

press the

A button to toggle the progress beeper on and off.

• The “ ” indicator is on the display while the progress beeper is turned on.

Indicates progress beeper on

❚

To use the countdown timer

In the Timer Mode, press the countdown.

• The time counts down in 1-second steps.

Minutes

• Pressing the A button while the countdown is stopped resets to the countdown start time.

• Pressing the C button while the timer countdown is stopped restarts the countdown.

C button to start and stop the

(Reset)

Seconds

(Start/Stop)

Current Time

Operation Guide 2891

Use the

button to enter the Alarm Mode as

Using the Alarms and Hourly Time Signal

You can set up to five independent daily alarms. An alarm sounds for 10 seconds when an alarm time is reached. The Hourly Time signal causes the watch to beep every hour on the hour.

❚

To set an alarm time

1. In the Alarm Mode, use the

C (forward) and

buttons to scroll through the alarm screens in the sequence shown below until the one you want is displayed.

• When you enter the Alarm Mode, the alarm screen that was displayed the last time you exited the mode appears first.

Alarm 1 Alarm 2 Alarm 3

Hourly Time Signal

A (back)

Alarm 5 Alarm 4

Mode Indicator

Alarm Time

Alarm Number

Current Time

2. Hold down the

for about two seconds until the hour setting starts to flash on the display. This is the setting screen.

• This also causes the alarm indicator to appear, and turns on the alarm automatically.

3. Use the

• Holding down either button

• When setting the hour, make sure you specify AM (no

• The same 12-hour/24-hour format you select for the

C (+) and

buttons to change the hour setting.

scrolls the setting at high speed.

indicator) or PM (P) correctly when using 12-hour timekeeping, or that you specify the correct 24-hour time.

Timekeeping Mode time is also applied in the Alarm Mode.

shown under “Modes and Display Screens”.

E button

A (–)

Alarm Indicator

Hour

(2 seconds)

（−）

（＋）

4. Press the

• As with the hour setting, use

5. When the setting is the way you want, press the

• This exits the setting screen.

• The display also will exit the setting screen automatically if

D button to

move the flashing to the minute digits.

the C (+) and A (–) buttons to change the minute setting.

Minutes

button to exit the setting screen and return to the timer mode screen.

you do not perform any operation for about two or three minutes.

❚

(–)

To turn an alarm or the hourly time signal on or off

1. In the Alarm Mode, use the

the setting you want to turn on or off.

(+)

2. Press the

• Turning on an alarm or the Hourly Time Signal causes its

Alarm Indicator

❚

To stop the alarm beeper

Pressing any button while the beeper is sounding stops it.

❚

To test the alert operation

In the Alarm Mode, hold down the C button to sound the alarm.

B button to toggle the displayed setting on

and off.

indicator to appear on the display.

Alarm 2 Screen

C and

A buttons to select

Hourly Time Signal Indicator

Hourly Time Signal Screen

Using World Time

World time lets you display the current time in any one of 30 cities (29 time zones) around the world.

• When you enter the World Time Mode, the screen for the city that was displayed when you last exited the mode appears first.

• The seconds count in the World Time Mode is linked with the Timekeeping Mode seconds count.

• The same 12-hour/24-hour format you select for the Timekeeping Mode time is also applied in the World Time Mode.

Important!

If the World Time Mode time is incorrect, correct the setting of the current time in the Timekeeping Mode.

• See “To configure Home City settings” for more information.

Use the

D button to enter the World Time Mode as shown

under “Modes and Display Screens”.

❚

To search for a city code

In the World Time Mode, use the (Westward) buttons to scroll through city codes.

• Holding down either button scrolls at high speed.

World Time

C (Eastward) and

City Code

(Westward)

(Eastward)

(Westward)

(Eastward)

Using Summer Time (DST)

Summer time, or Daylight Saving Time (DST) as is it is called in some countries, calls for setting clocks ahead one hour during the summer season. Note that the use of summer time depends on the country and even the local area.

❚

To turn summer time on or off

1. In the World Time Mode, use the

(Westward) buttons to select the city whose summer time setting you want to change.

2. Hold down the

for about two seconds to toggle summer time on and off.

• The “DST” indicator appears on the display and timekeeping is advanced by one hour when summer time is turned on.

• You can turn summer time on or off independently for each World Time Mode city. Note, however, that you cannot change the summer time setting for the “GMT” (Greenwich Mean Time) zone.

• If you turn on summer time for the city that you are using for your Home Time city, summer time is also turned on in the Timekeeping Mode.

E button

C (Eastward) and

(2 seconds)

DST indicator

World Time City Code List

GMT

City

Differential

–11 –10

–9 –8 –7 –6 –5 –4 –3 –2 –1

Greenwich Mean Time

+0 +0 +1 +1 +2 +2

City Name

Honolulu

Anchorage

Los Angeles

Denver

Chicago

New York

Caracas

Rio de Janeiro

London

Pari s

Berlin

Athens

Cairo

Code

– – –

HNL

ANC

LAX

DEN

CHI NYC CCS

RIO – – – – – – GMT

LON

PA R

BER

AT H

CAI

• The contents of the above table are current as of June 2004.

• Time differentials in the above table are in accordance with

Universal Time Coordinated (UTC).

City Code

JRS JED THR DXB KBL KHI DEL

DAC RGN BKK HKG

SEL

TYO

ADL SYD NOU WLG

GMT Differential

+2 +3

+3.5

+4.5

+5.5

+6.5

+7 +8 +9 +9

+9.5

+10 +11 +12

City Name

Jerusalem

Jeddah Teheran

Dubai Kabul

Karachi

Delhi

Dakar

Yangon

Bangkok

Hong Kong

Seoul Tokyo

Adelaide

Sydney

Noumea

Wellington

Operation Guide 2891

Setting the Home City Time and Date

You can use the following procedure to set the current time and date of the Home City that you have selected in the Timekeeping Mode.

• Always use the Timekeeping Mode to set and adjust the current time and date settings.

• You can also turn Power Saving on and off while setting the time and date.

❚

To configure Home City settings

1. In the Timekeeping Mode

hold down the for about two seconds until the current city code flashes on the display.

6. While the 12/24-hour

setting is selected, press

the

C button to toggle the

timekeeping format between 12-hour (“12H” indicator) and 24-hour (24H indicator).

7. While the seconds are

selected, press the button to reset them to 00 in accordance with the time signal on the radio, TV, etc.

• Pressing the C button while the seconds count is in the range of 30 to 59 resets it to 00 and also adds 1 to the minutes. Pressing the C button in the range of 00 to 29 resets the seconds count without changing the minutes. In Japan, you can obtain the current time by dialing 117 on the telephone.

• While the seconds are flashing, you can also press the A button to change the illumination duration. See “To specify the illumination duration” for more information.

E button

City Code

(2 seconds)

12/24-hour Timekeeping

Resets to 00.

2. Use the

• See “World Time City Code

• Holding down either button

3. Press the

8. While the Hour, Minutes,

• Holding down either button

9. While the Power Saving

• Turning on Power Saving

Repeat the above steps as many times as necessary to select each setting and change it as required.

• When setting the hour, make sure you specify AM (no indicator) or PM (P) correctly when using 12-hour timekeeping, or that you specify the correct 24-hour time.

• You can set the year within the range of 2000 to 2099. The day of the week is set automatically in accordance with the date you set.

• The watch makes adjustments for leap years and month lengths automatically.

C (Eastward) and

A (Westward) buttons to

scroll through the city codes until the one you want to use as your Home City is displayed.

List” for a complete list of city codes.

scrolls at high speed.

D button to

change to the summer time setting.

Year, Month, or Day setting is flashing, use the

C (+) and

to change it.

scrolls at high speed.

setting is selected, press the On and OFF.

causes the Power Saving indicator to appear on the setting screen.

A (–) buttons

C button to toggle it

TYO = Tokyo

Month, Day

Hour

(Westward)

(Eastward)

Minutes

(–)

(+)

Seconds

4. Press the

• AT (Auto)

This setting enables the auto summer time setting, which turns summer time on or off in accordance with the received time calibration signal.

• When TYO (Tokyo) is selected at the Home City, this setting changes the time in accordance with Japanese summer time.

• OFF

This setting turns off summer time, and displays the current time normally.

• On

This setting turns on summer time.

• Selecting this setting displays the DST indicator, and advances the current time setting by one hour.

• Note that the above setting toggles between “OFF” and “On” when any city code other than HKG, TYO, or SEL is selected as the Home City.

10.

• The display also will exit the setting screen automatically if

C button to

cycle through the summer time settings until the one you want is displayed.

When all of the settings are the way you want, press

the

E button to exit the setting screen and return to the

Timekeeping Mode screen.

you do not perform any operation for about two or three minutes.

5. From here you can use the

D button to select the

settings shown below. Each press of the button causes the applicable setting to flash.

Power Saving

Day

• You can change the illumination duration setting while the seconds are flashing.

Month

Summer TimeHome City

Year

12/24-hour

Seconds

Minutes

Hour

Casio 2891 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Keep your watch exposed to light!

Using Your Watch for Mountain Climbing

Modes and Display Screens

Power Saving

Power Supply

Illumination

How a Radio-controlled Watch Works

Taking Direction Readings

Taking Pressure and Temperature Readings

Taking Altitude Readings

Sensor Error Detection

Using the Stopwatch

Using the Timer

Using the Alarms and Hourly Time Signal

Using World Time

Setting the Home City Time and Date