Casio Watch QW 3135 User Manual

MO0909-EA  
Operation Guide 3135 3206  
Getting Acquainted  
The watch continues to operate, even when it is not exposed to light.  
Leaving the watch in the dark can cause the battery to run down, which will  
result in some watch functions being disabled. If the battery goes dead, you  
will have to re-configure watch settings after recharging. To ensure normal  
watch operation, be sure to keep it exposed to light as much as possible.  
Congratulations upon your selection of this CASIO watch. To get the most out  
of your purchase, be sure to read this manual carefully.  
Applications  
The built-in sensors of this watch measure direction, barometric pressure,  
temperature and altitude. Measured values are then shown on the display.  
Such features make this watch useful when hiking, mountain climbing, or  
when engaging in other such outdoor activities.  
Battery charges in the light.  
Battery discharges in the dark.  
Bright light  
Solar cell  
(Converts light to  
electrical power.)  
Electrical  
energy  
Warning!  
The measurement functions built into this watch are not intended for  
taking measurements that require professional or industrial precision.  
Values produced by this watch should be considered as reasonable  
representations only.  
The Moon phase indicator and tide graph data that appear on the  
display of this watch are not intended for navigation purposes. Always  
use proper instruments and resources to obtain data for navigation  
purposes.  
All  
functions  
enabled  
LEVEL 1  
LEVEL 2  
LEVEL 1  
LEVEL 2  
LEVEL 3  
LEVEL 4  
Some  
functions  
disabled  
LEVEL 3  
LEVEL 4  
Dis-  
charge  
Charge  
Rechargeable battery  
This watch is not an instrument for calculating low tide and high tide  
times. The tide graph of this watch is intended to provide a reasonable  
approximation of tidal movements only.  
When engaging in mountain climbing or other activities in which losing  
your way can create a dangerous or life-threatening situation, always be  
sure to use a second compass to confirm direction readings.  
Note that CASIO COMPUTER CO., LTD. assumes no responsibility for  
any damage or loss suffered by you or any third party arising through  
the use of this product or its malfunction.  
The actual level at which some functions are disabled depends on the  
watch model.  
Frequent display illumination can run down the battery quickly and require  
charging. The following guidelines give an idea of the charging time  
required to recover from a single illumination operation.  
Approximately five minutes exposure to bright sunlight coming in through  
a window  
Approximately 50 minutes exposure to indoor fluorescent lighting  
Be sure to read “Power Supply” for important information you need to  
know when exposing the watch to bright light.  
Keep the watch exposed to bright light  
The electricity generated by the solar cell of the  
watch is stored by a built-in battery. Leaving or  
If the display of the watch is blank...  
If the display of the watch is blank, it means that the watch’s Power Saving  
function has turned off the display to conserve power.  
See “Power Saving” for more information.  
Bright light  
using the watch where it is not exposed to light  
causes the battery to run down. Make sure the  
watch is exposed to light as much as possible.  
When you are not wearing the watch on your  
wrist, position the face so it is pointed at a  
source of bright light.  
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About This Manual  
Solar cell  
Depending on the model of your watch, display  
text appears either as dark figures on a light  
background (Module 3135), or light figures on a  
dark background (Module 3206). All sample  
displays in this manual are shown using dark  
figures on a light background.  
You should try to keep the watch outside of  
your sleeve as much as possible. Charging is  
reduced significantly if the face is covered only  
partially.  
Button operations are indicated using the  
letters shown in the illustration.  
(Light)  
Module 3135  
Each section of this manual provides you with  
the information you need to perform operations  
in each mode. Further details and technical  
information can be found in the “Reference”  
section.  
Module 3206  
You can use buttons A, B, and Cto enter a sensor mode directly from  
the Timekeeping Mode or from another sensor mode. To enter a sensor  
mode from the Tide/Moon Data, Countdown Timer, Stopwatch, World Time,  
Alarm, or Data Recall Mode, first enter the Timekeeping Mode and then  
press the applicable button.  
General Guide  
The illustration below shows which buttons you need to press to navigate  
between modes.  
In any mode, press Lto illuminate the display.  
Timekeeping Mode  
Sensor Modes  
Stopwatch  
Mode  
Countdown  
Timer Mode  
Tide/Moon Data  
Mode  
L
L
L
Press  
D.  
Press A.  
Press C.  
Press B.  
Digital  
Barometer/  
Compass Mode  
Thermometer Mode  
Altimeter Mode  
L
L
Data Recall  
Mode  
World Time Mode  
Alarm Mode  
Press D.  
1
 
Operation Guide 3135 3206  
Any ongoing direction measurement operation is paused temporarily while  
To perform magnetic declination correction  
1. In the Digital Compass Mode, hold down E  
the watch is performing an alert operation (daily alarm, Hourly Time Signal,  
countdown timer alarm) or while illumination is turned on (by pressing L).  
The measurement operation resumes for its remaining duration after the  
operation that caused it to pause is finished.  
for about two seconds until the magnetic  
declination angle and magnetic declination  
angle direction values start to flash on the  
display. This is the setting screen.  
Magnetic declination  
angle direction  
The following table shows the meanings of each of the direction  
abbreviations that appear on the display.  
2. Use A(+) and C() to change the magnetic  
declination angle and magnetic declination  
angle direction settings.  
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Direction Meaning Direction Meaning Direction Meaning Direction Meaning  
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North-  
East-  
You can select a value within the range of  
W 90° to E 90° with these settings.  
The following explains magnetic declination  
angle direction settings.  
N
E
North  
East  
NNE  
ESE  
NE  
SE  
Northeast  
Southeast  
ENE  
SSE  
northeast  
northeast  
East-  
southeast  
South-  
southeast  
Magnetic  
declination  
angle value  
South-  
West-  
S
South  
West  
SSW  
WNW  
SW Southwest WSW  
NW Northwest NNW  
OFF: No magnetic declination correction  
performed. The magnetic declination  
angle with this setting is 0°.  
southwest  
southwest  
West-  
northwest  
North-  
northwest  
W
E: When magnetic north is to the east (east declination)  
W: When magnetic north is to the west (west declination)  
You can turn off (OFF) magnetic declination correction (which effectively  
makes the magnetic declination angle: 0°) by pressing Aand Cat the  
same time.  
See Digital Compass Precautionsfor other important information about  
taking direction readings.  
Digital Compass Precautions  
This watch features a built-in magnetic bearing sensor that detects terrestrial  
magnetism. This means that north indicated by this watch is magnetic north,  
which is somewhat different from true polar north. The magnetic north pole is  
located in northern Canada, while the magnetic south pole is in southern  
Australia. Note that the difference between magnetic north and true north as  
measured with all magnetic compasses tends to be greater as one gets  
closer to either of the magnetic poles.You also should remember that some  
maps indicate true north (instead of magnetic north), and so you should make  
allowances when using such maps with this watch.  
The illustration above, for example, shows the value you should input  
and the direction setting you should select when the map shows a  
magnetic declination of 1° West.  
3. When the setting is the way you want, press Eto exit the setting screen.  
Precautions about bidirectional calibration  
You can use any two opposing directions for bidirectional calibration.You  
must, however, make sure that they are 180 degrees opposite each other.  
Remember that if you perform the procedure incorrectly, you will get wrong  
bearing sensor readings.  
Location  
Taking a direction reading when you are near a source of strong magnetism  
can cause large errors in readings. Because of this, you should avoid taking  
direction readings while in the vicinity of the following types of objects:  
permanent magnets (magnetic necklaces, etc.), concentrations of metal  
(metal doors, lockers, etc.), high tension wires, aerial wires, household  
appliances (TVs, personal computers, washing machines, freezers, etc.)  
Accurate direction readings are impossible while in a train, boat, air plane,  
etc.  
Make sure that you do not move the watch while calibration of either  
direction is in progress.  
You should perform bidirectional calibration in an environment that is the  
same as that where you plan to be taking direction readings. If you plan to  
take direction readings in an open field, for example, calibrate in an open  
field.  
To perform bidirectional calibration  
1. In the Digital Compass Mode, hold down E  
for about two seconds until the magnetic  
declination angle and magnetic declination  
angle direction values start to flash on the  
display. This is the setting screen.  
2. Press Dto display the bidirectional  
calibration screen.  
At this time, the north pointer flashes at the  
12 oclock position to indicate that the watch  
is ready to calibrate the first direction.  
Accurate readings also are impossible indoors, especially inside ferro-  
concrete structures. This is because the metal framework of such structures  
picks up magnetism from appliances, etc.  
Storage  
The precision of the bearing sensor may deteriorate if the watch becomes  
magnetized. Because of this, you should be sure to store the watch away  
from magnets or any other sources of strong magnetism, including:  
permanent magnets (magnetic necklaces, etc.) and household appliances  
(TVs, personal computers, washing machines, freezers, etc.)  
Whenever you suspect that the watch may have become magnetized,  
perform one of the calibration procedures under Calibrating the Bearing  
Sensor.  
3. Place the watch on a level surface facing any direction you want, and  
press Cto calibrate the first direction.  
xxx is shown on the display while calibration is being performed. When  
calibration is successful, the display will show OK and x2x, and the  
north pointer flashes at the 6 oclock position. This means that the watch  
is ready for calibration of the second direction.  
4. Rotate the watch 180 degrees.  
5. Press Cagain to calibrate the second direction.  
xxx is shown on the display while calibration is being performed. When  
calibration is successful, the display will show OK and the Digital Compass  
Mode (showing the angle value) screen.  
Calibrating the Bearing Sensor  
You should calibrate the bearing sensor whenever you feel that the direction  
readings being produced by the watch are off. There are three different  
calibration methods available: magnetic declination correction, bidirectional  
calibration, and northerly calibration.  
Magnetic Declination Correction  
With magnetic declination correction, you input a magnetic declination  
angle (difference between magnetic north and true north), which allows the  
watch to indicate true north.  
If xxx appears and then changes to  
(error) on the calibration  
screen, it means that there is something wrong with the sensor. When  
ERR  
You can perform this procedure when the magnetic declination angle is  
indicated on the map you are using.  
disappears after about one second, try performing the calibration  
ERR  
again. If  
keeps appearing, contact your original dealer or nearest  
ERR  
Note that you can input the declination angle in degree units only, so you  
may need to round off the value specified on the map. If your map indicates  
the declination angle as 7.4°, you should input 7°. In the case of 7.6° input  
8°, for 7.5° you can input 7° or 8°.  
authorized CASIO distributor to have the watch checked.  
To perform northerly calibration  
1. In the Digital Compass Mode, hold down E  
for about two seconds until the magnetic  
declination angle and magnetic declination  
angle direction values start to flash on the  
display. This is the setting screen.  
2. Press Dtwice to display the northerly  
calibration screen.  
Bidirectional Calibration and Northerly Calibration  
Bidirectional calibration and northerly calibration calibrate the accuracy of  
the direction sensor in relation to magnetic north.  
Use bidirectional calibration when you want to take readings within an area  
exposed to magnetic force. This type of calibration should be used if the  
watch becomes magnetized for any reason. With northerly calibration, you  
teachthe watch which way is north (which you have to determine with  
another compass or some other means).  
At this time, -N- (north) appears on the  
display.  
3. Place the watch on a level surface, and position it so that its 12 oclock  
position points north (as measured with another compass).  
4. Press Cto start the calibration operation.  
Important!  
If you want to perform both bidirectional and northerly calibration, be sure  
to perform bidirectional calibration first, and then perform northerly  
calibration. This is necessary because bidirectional calibration cancels any  
existing northerly calibration setting.  
--- is shown on the display while calibration is being performed. When  
calibration is successful, the display will show OK and the Digital Compass  
0
Mode (with ° shown as the angle value).  
The more correctly you perform bidirectional calibration, the better the  
accuracy of the bearing sensor readouts.You should perform bidirectional  
calibration whenever you change environments where you use the bearing  
sensor, and whenever you feel that the bearing sensor is producing  
incorrect readings.  
If --- appears and then changes to  
(error) on the calibration  
ERR  
screen, it means that there is something wrong with the sensor. When  
disappears after about one second, try performing the calibration  
ERR  
again. If  
keeps appearing, contact your original dealer or nearest  
ERR  
authorized CASIO distributor to have the watch checked.  
3
 
Operation Guide 3135 3206  
3. In the Timekeeping, Digital Compass,  
Using the Digital Compass While Mountain Climbing or  
12 oclock  
position  
Barometer/Thermometer, or Altimeter Mode,  
press Cto take a compass reading.  
The compass reading information (angle  
value, direction indicator, and four pointers  
based on the 12 oclock position of the  
watch) will appear on the display after about  
two seconds.  
The compass reading information will  
remain on the display for only about 20  
seconds after you press C. After that it will  
disappear. If you want to re-display the  
compass reading information, press C  
again to take another reading.  
Hiking  
This section describes three real-life situations where you could use the  
watchs built-in digital compass.  
To set a map and find your current location  
Having an idea of your current location is important when mountain  
climbing or hiking. To do this, you need to set the map, which means to  
align the map so the directions indicated on it are aligned with the actual  
directions of your location. Basically what you are doing is aligning north on  
the map with north as indicated by the watch.  
North  
pointer  
To find the bearing to an objective  
To determine the direction angle to an objective on a map and head in that  
direction  
Direction angle of  
current reading  
To set a map and find your current location  
4. Rotate the bezel so the N(North) indicator on the bezel is aligned with  
the north indicator produced by the reading in step 3.  
5. To advance to your objective proceed in the direction that 12 oclock is  
pointing.  
North indicated  
on the map  
1. With the watch on your wrist, position it so the  
face is horizontal.  
2. In the Timekeeping, Digital Compass,  
Barometer/Thermometer, or Altimeter Mode,  
press Cto take a compass reading.  
The reading will appear on the display after  
about two seconds.  
Note  
When mountain climbing or hiking, conditions or geographic contours may  
make it impossible for you to advance in a straight line. If this happens,  
return to step 1 and save a new direction to the objective.  
3. Rotate the map without moving the watch so  
the northerly direction indicated on the map  
matches north as indicated by the watch.  
If the watch is configured to indicate  
magnetic north, align the maps magnetic  
north with the watch indication. If the watch  
has been configured with a declination to  
correct to true north, align the maps true  
north with the watch indication.  
Current  
location  
N
Barometer/Thermometer  
This watch uses a pressure sensor to measure air pressure (barometric  
pressure) and a temperature sensor to measure temperature.  
You can calibrate the pressure sensor and the temperature sensor if you  
suspect that readings are incorrect.  
N
North indicated by  
north pointer  
This will position the map in accordance  
with your current location.  
To take barometric pressure and temperature readings  
Pressure  
differential  
pointer  
Pressing Bin the Timekeeping Mode or in any  
of other sensor modes enters the Barometer/  
Thermometer Mode and starts barometric  
pressure and temperature measurements  
automatically .  
It can take up to four or five seconds for the  
barometric pressure reading to appear after  
you enter the Barometer/Thermometer Mode.  
Barometric pressure is displayed in units of  
1hPa (or 0.05 inHg).  
4. Determine your location as you check the  
geographic contours around you.  
Barometric  
pressure graph  
To find the bearing to an objective  
1. Take a compass reading and then set the map  
so its northerly indication is aligned with north  
as indicated by the watch, and determine your  
current location.  
See To set a map and find your current  
locationfor information about how to  
perform the above step.  
2. Set the map so the direction you want to travel  
on the map is pointed straight in front of you.  
3. With the watch on your wrist, position it so the  
face is horizontal.  
4. In the Timekeeping, Digital Compass,  
Barometer/Thermometer, or Altimeter Mode,  
press Cto take a compass reading.  
The reading will appear on the display after  
about two seconds.  
Objective  
Barometric  
pressure  
Temperature  
Current  
location  
The displayed barometric pressure value changes to  
hPa (or inHg) if  
xxxx  
a measured barometric pressure falls outside the range of 260 hPa to  
1100 hPa (7.65 inHg to 32.45 inHg).The barometric pressure value will  
reappear as soon as the measured barometric pressure is within the  
allowable range.  
12 oclock  
position  
Temperature is displayed in units of 0.1°C (or 0.2°F).  
The displayed temperature value changes to  
.
°C (or °F) if a  
xxx x  
measured temperature falls outside the range of 10.0°C to 60.0°C (14.0°F  
to 140.0°F). The temperature value will reappear as soon as the measured  
temperature is within the allowable range.  
5. Still holding the map in front of you, turn your  
body until north as indicated by the watch and  
the northerly direction on the map are aligned.  
In some areas, barometric pressure is expressed in millibars (mb) instead  
of hectopascals (hPa). It really makes no difference, because 1hPa = 1mb.  
You can select either hectopascals (hPa) or inchesHg (inHg) as the display  
unit for the measured barometric pressure, and Celsius (°C) or Fahrenheit  
(°F) as the display unit for the measured temperature value. See To select  
the temperature, barometric pressure, and altitude units.  
This will position the map relative to your current location, so the bearing to  
your objective is straight ahead of you.  
To determine the direction angle to an objective on a map and head  
in that direction  
See Barometer and Thermometer Precautionsfor important precautions.  
Note  
The following procedure is possible only with a  
watch that has a rotary bezel.  
1. Take a compass reading and then set the map  
so its northerly indication is aligned with north  
as indicated by the watch, and determine your  
current location.  
See To set a map and find your current  
locationfor information about how to  
perform the above step.  
2. As shown in the illustration to the left, change  
your position so you (and the 12 oclock  
position of the watch) are pointed in the  
direction of objective, while keeping the map  
aligned with the readings being produced by  
the watch.  
Barometric Pressure Graph  
Barometric pressure indicates changes in the atmosphere. By monitoring  
these changes you can predict the weather with reasonable accuracy.  
This watch takes barometric pressure measurements automatically every two  
hours (at the top of each even-numbered hour), regardless of its current  
mode. Measurement results are used to produce barometric pressure graph  
and barometric pressure differential pointer readings.  
Objective  
Current  
location  
12 oclock  
position  
The barometric pressure graph shows readings of previous measurements for  
up to 20 hours.The horizontal axis of the graph represents time, with each dot  
standing for two hours. The rightmost dot represents the most recent reading.  
The vertical axis of the graph represents barometric pressure, with each dot  
standing for the relative difference between its reading and that of the dots  
next to it. Each dot represents 1hPa.  
The following shows how to interpret the data that appears on the barometric  
pressure graph.  
If you find it difficult to perform the above step while keeping everything  
aligned, first move into the correct position (12 oclock position of the  
watch pointed at the objective) without worrying about the orientation of  
the map. Next, perform step 1 again to set the map.  
A rising graph generally means improving weather.  
A falling graph generally means deteriorating weather.  
4
 
Operation Guide 3135 3206  
Note that if there are sudden changes in barometric  
When you measure altitude using a reference altitude specified by you  
After you specify a reference altitude, the watch uses that value to convert the  
current measured barometric pressure value to altitude.  
pressure or temperature, the graph line of past  
measurements may run off the top or bottom of the display.  
The entire graph will become visible once barometric  
conditions stabilize.  
The following conditions cause the barometric pressure  
measurement to be skipped, with the corresponding point on  
the barometric pressure graph being left blank.  
When mountain climbing, you can set the  
Not visible on  
the display.  
reference value in accordance with a marker  
B
along the way or altitude information from a  
map. After that, the altitude readings  
produced by the watch will be more accurate  
than they would without a reference altitude.  
A
400  
Barometric reading that is out of range (260 hPa/mb to 1,100 hPa/mb or  
7.65 inHg to 32.45 inHg)  
Sensor malfunction  
Displaying Your Current Altitude  
You can use the procedure described in this section to display your current  
altitude. If you leave the watch in the Altimeter Mode, it will update the  
displayed altitude value regularly, and indicate reading-to-reading changes in  
the altitude graph at the top of the display.  
Barometric Pressure Differential Pointer  
This pointer indicates the relative difference between the most recent  
barometric pressure reading indicated on the barometric pressure graph, and  
the current barometric pressure value displayed in the Barometer/  
Thermometer Mode.  
Important!  
Pressure differential is indicated in the range of 5 hPa, in 1-hPa units.  
The barometric pressure differential pointer is not displayed when the  
displayed current barometric value is outside of the allowable measurement  
range (260 to 1,100 hPa).  
Barometric pressure is calculated and displayed using hPa as the standard.  
The barometric pressure differential also can be read in inHg units as  
shown in the illustration.  
The procedure in this section simply displays values indicating your current  
altitude, without storing them in watch memory. For information about  
recording altitude readings in watch memory, see Saving Altitude Data.  
To display your current altitude  
1. Press Ain the Timekeeping Mode or in any  
of the other sensor modes to enter the  
Current altitude  
Altitude  
graph  
Altimeter Mode.  
Current pressure greater  
inHg values  
The watch will start altitude measurement  
automatically, and display the result.  
It can take up to four or five seconds for the  
altitude reading to appear after you enter  
the Altimeter Mode.  
than most recent  
measured pressure  
hPa values  
Barometric pressure  
differential  
2. Leave the watch in the Altimeter Mode if you  
want the displayed altitude value and the  
altitude graph contents to be updated at  
regular intervals.  
Current time  
Readings are taken at five-second intervals for the first three minutes  
after you enter the Altimeter Mode. After that, readings are taken at two-  
minute intervals.  
If you want to restart the altitude measurement operation at any point,  
press A.  
Pressure differential  
examples in the  
illustration are indicated  
in 3 hPa/0.1 inHg steps.  
Current pressure less  
than most recent  
measured pressure  
3. To stop the altitude measurement operation, press Dto exit the Altimeter  
Mode.  
About Barometric and Temperature Measurements  
Barometric pressure and temperature measurement operations are  
performed as soon as you enter the Barometer/Thermometer Mode. After  
that, barometric pressure and temperature measurements are taken every  
five seconds.  
Notes  
Normally, displayed altitude values are based on the watchs preset  
conversion values.You also can specify a reference altitude, if you want.  
See Specifying a Reference Altitude.  
Altitude is displayed in units of 5 meters (20 feet).  
The measurement range for altitude is 700 to 10,000 meters (2,300 to  
32,800 feet).  
You also can perform a barometric pressure and temperature measurement  
at any time by pressing Bin the Barometer/Thermometer Mode.  
The measured altitude may be a negative value in cases where there is a  
reference altitude value set or because of certain atmospheric conditions.  
The displayed altitude value changes to xxxx meters (or feet) if a  
measured altitude falls outside the measurement range. The altitude value  
will be displayed again as soon as the measured altitude is within the  
allowable range.  
You can change the measurement unit for displayed altitude values to either  
meters (m) or feet (ft). See To select the temperature, barometric pressure,  
and altitude units.  
Altimeter  
The watchs altimeter uses a pressure sensor to detect current air pressure,  
which is then used to estimate the current altitude based on ISA (International  
Standard Atmosphere) preset values.You also can specify a reference  
altitude, which the watch will use to calculate your current altitude based on  
the value you specify. Altimeter functions also include storage of  
measurement data in memory.  
Important!  
Saving Altitude Data  
This watch estimates altitude based on air pressure. This means that  
altitude readings for the same location may vary if air pressure changes.  
The semiconductor pressure sensor used by the watch for altitude  
measurements also is affected by temperature. When taking altitude  
measurements, make sure the watch is not subjected to temperature  
changes.  
The watch automatically keeps track of the high altitude achieved to date.  
You also can save altitude readings with the touch of a button.  
You can recall and view altitude data using the Data Recall Mode. For  
details, see Recalling Altitude Data.  
Automatic High Altitude Record  
Whenever an altitude measurement in the Altimeter Mode is greater than the  
currently stored high altitude value, the watch will replace the old value with  
the new measurement automatically, along with the reading date and time.  
This feature is always enabled and cannot be turned off.  
If the current reading is the same as the existing high altitude value, the  
older value will be retained.  
To avoid the effect of sudden temperature changes during measurement,  
keep the watch on your wrist in direct contact with your skin.  
Do not rely upon this watch for altitude measurements or perform button  
operations while sky diving, hang gliding, or paragliding, while riding a  
gyrocopter, glider, or any other aircraft, or while engaging in any other  
activity where there is the chance of sudden altitude changes.  
Do not use this watch for measuring altitude in applications that demand  
professional or industrial level precision.  
Saving an Altitude Reading  
Perform the following procedure whenever you want to save an altitude reading.  
Remember that the air inside of a commercial aircraft is pressurized.  
Because of this, the readings produced by this watch will not match the  
altitude readings announced or indicated the flight crew.  
To save an altitude reading  
1. Press  
2. Hold down  
A
to enter the Altimeter Mode.  
until REC flashes on the display.  
A
How the Altimeter Measures Altitude  
The altimeter can measure altitude based on its own preset values, or a  
reference altitude specified by you.  
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At this time the watch will beep and the  
current altitude reading value will be saved  
along with the reading date (month - day)  
and time.  
When you measure altitude based on preset values  
Data produced by the watchs barometric pressure sensor is converted to  
approximate altitude based on ISA (International Standard Atmosphere)  
conversion values stored in watch memory.  
3. REC will stop flashing and the watch will  
return to the Altimeter Mode automatically  
after data save is complete.  
Memory can store up to 24 altitude records. Storing a new reading while  
there are already 24 in memory will delete the oldest record currently in  
memory to make room for the new reading.  
5
 
Operation Guide 3135 3206  
Tide/Moon Data  
Specifying a Reference Altitude  
In the Tide/Moon Data Mode, you can see the current tide and the current  
dates Moon phase for your Home City.You can specify a date and view tide  
and Moon data for that date.  
See Moon Phase Indicatorfor information about the Moon phase indicator  
and Tide Graphfor information about the tide graph.  
All of the operations in this section are performed in the Tide/Moon Data  
Mode.  
After you specify a reference altitude, the watch adjusts its air-pressure-to-  
altitude conversion calculation accordingly. The altitude measurements  
produced by this watch are subject to error caused by changes in air  
pressure. Because of this, we recommend that you update the reference  
altitude whenever one is available during your climb.  
To set a reference altitude  
1. In the Altimeter Mode, hold down Efor about  
two seconds until either OFF or the current  
reference altitude value starts to flash. This is  
the setting screen.  
2. Press A(+) or C() to change the current  
reference altitude value by 5 meters (or 20 feet).  
You can set the reference altitude within the  
range of 10,000 to 10,000 meters (32,800  
to 32,800 feet).  
Tide Data  
The Tide Graph that appears first when you enter the Tide/Moon Data Mode  
shows the data at 6:00 a.m. for your currently selected Home City on the  
current date, according to the Timekeeping Mode. From there you can specify  
another date or time.  
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If the tide data is not correct, check your Timekeeping Mode settings and  
correct them if necessary.  
If you feel that the information shown by the Tide Graph is different from  
actual tide conditions, you need to adjust the high tide time. See Adjusting  
the High Tide Timefor more information.  
Pressing Aand Cat the same time returns to OFF (no reference  
altitude), so the watch performs air pressure to altitude conversions  
based on preset data only.  
Moon Data  
The Moon phase and Moon age information that appears first when you enter  
the Tide/Moon Data Mode shows the data at noon for your currently selected  
Home City on the current date, according to the Timekeeping Mode. After that  
you can specify another date to view data.  
3. Press Eto exit the setting screen.  
Altitude graph  
The altitude graph shows Altimeter Mode  
measurement results.  
The vertical axis of the graph represents  
altitude, and each dot stands for 10 meters (40  
If the Moon data is not correct, check your Timekeeping Mode settings and  
correct them if necessary.  
If the Moon phase indicator shows a phase that is a mirror image of the  
actual moon phase in your area, you can use the procedure under  
Reversing the Displayed Moon Phaseto change it.  
Altitude  
feet).  
Time  
The horizontal axis represents time, and the flashing dot in the rightmost  
column indicates the latest measurement result. For the first three minutes,  
each dot represents five seconds. After that, each dot represents two  
minutes.  
An out of range measurement result or a measurement error will cause the  
column of dots for that measurement to be blank (skipped).  
To view Moon Data for a particular date, or Tide Data for a  
particular date and time  
1. In the Tide/Moon Data Mode, use A(+) and  
C() to select the date you want.  
Moon age  
Moon  
phase  
After you select a date, the watch starts to  
calculate Moon and tide data for the date you  
selected. The calculation operation takes  
about 10 seconds, and is indicated by  
Recalling Altitude Data  
In the Data Recall Mode, you can recall and view altitude reading records you  
stored in the Altimeter Mode, as well as the high altitude record.  
movement in the Moon Phase indicator and  
the Tide Graph on the display.You can use  
and to change to another date while a  
calculation operation is in progress.  
A
C
All of the operations in this section are performed in the Data Recall Mode.  
Data Screens  
After calculation is complete, the Moon  
information (Moon age and phase) and tide  
information (current tide level and tide  
range) will be displayed for the date you  
selected.  
Current  
tide range  
Current  
tide level  
The following explains the contents of each of the screens that appear in the  
Data Recall Mode.  
Note  
While the altitude record or high altitude screen is displayed, the bottom  
part of the display alternates between the measurement date (month and  
day) and measurement time, at 1-second intervals.  
2. While the Moon information (Moon age and phase) and tide information  
(tide level and tide range for the current date) are displayed, you can press  
B(+) to advance the displayed tide range by one hour.  
You also can use A(+) and C() to change the date.  
Update of the Moon Phase indicator and the Tide Graph is stopped while  
any of the following is occurring.  
Measurement date  
(Month Day)  
Altitude  
record  
indicator  
Alternates at  
1-second intervals.  
During button operation  
While an alarm is sounding  
Measurement time  
(Hour : Minute)  
Altitude  
While a countdown beeper is sounding  
During display illumination  
During a 2-hour barometric pressure reading operation  
To view altitude reading records and the high altitude record  
1. Enter the Data Recall Mode.  
After about one second a record with MAX on the top will appear. This is  
Adjusting the High Tide Time  
Use the following procedure to adjust the high tide time within a particular  
date.You can find out high tide information for your area from a tide table, the  
Internet, or your local newspaper.  
the high altitude record.  
2. Use A(+) and C() to scroll through the other altitude reading records.  
To delete all altitude data currently in memory  
1. In the Data Recall Mode, hold down Euntil  
CLR flashes on the display and the watch  
beeps twice.  
To adjust the high tide time  
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1. In the Tide/Moon Data Mode, use A(+) and  
C() to select the date you want.  
l
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Releasing Eat any time while CLR is  
flashing on the display will cancel the delete  
operation.  
2. Keep Edepressed for two seconds.  
The watch will beep to indicate that all of the  
altitude data stored in watch memory (including  
readings you stored and the high altitude  
value) is deleted.  
After you select a date, the watch starts to  
calculate Moon and tide data for the date  
you selected. The calculation operation  
takes about 10 seconds, and is indicated by  
movement in the Moon Phase indicator and  
the Tide Graph on the display.You can use  
Aand Cto change to another date while  
a calculation operation is in progress.  
After calculation is complete, the Moon  
information (Moon age and phase) and tide  
information (current tide level and tide  
range) will be displayed for the date you  
selected.  
6
 
Operation Guide 3135 3206  
2. While the Moon information (Moon age and  
phase) and tide information (current tide level  
and tide range) are displayed, hold down E  
until the hour digits start to flash. This is the  
high tide time hour adjustment screen.  
3. Use A(+) and C() to change the hour  
setting.  
4. When the hour is the setting you want, press  
D.  
This will cause the minute digits to flash.  
5. Use A(+) and C() to change the minute  
setting.  
Countdown End Beeper  
Hour  
The watch beeps each second of the final 10 seconds before a countdown  
reaches zero, and at zero. The first five beeps (seconds 10 through 6) are  
higher pitched than the final five beeps (seconds 5 through 1). The watch  
emits a longer beep to signal when the countdown reaches zero.  
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Progress Beeper  
The progress beeper actually includes two beepers: a reset time beeper and  
a reset period beeper.  
Note that the reset time beeper and reset period beeper operate only while  
the progress beeper is turned on. For more information, see To turn the  
progress beeper on and off.  
l
Minute  
6. When the minute setting is the way you want,  
press Eto exit the adjustment screen and  
return to the Tide/Moon Data Mode screen.  
Pressing Aand Cat the same time while the  
time adjustment screen is displayed (steps 2  
through 5 above) will return the high tide time  
to its initial factory default setting.  
ResetTime Beeper  
The reset time beeper is similar to the countdown end beeper. The watch  
beeps each second of the final 10 seconds before the countdown reaches the  
reset time.  
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Reset Period Beeper  
The reset period is in the portion of the countdown between the reset time  
and zero. While timing is the reset period, the watch will beep four times at the  
top of each minute and 10 seconds before the end of the countdown.  
The high tide time setting is not affected by the DST (summer time) setting  
of the Timekeeping Mode.  
On some days, there are two high tides. With this watch, you can adjust the  
first high tide time only. The second high tide time for that day is adjusted  
automatically based on the first high tide time.  
Countdown Timer Examples  
Countdown start time: 10 minutes; Reset time: 5 minutes  
Progress beeper: On  
Reset Period  
Reversing the Displayed Moon Phase  
The left-right (east-west) appearance of the Moon depends on whether the  
Moon is north of you (northerly view) or south of you (southerly view) as you  
view it.  
Start Time  
10'00"  
Reset Time  
5'00"  
Reset Period Beeper  
Countdown  
End Beeper  
4'00"  
3'00"  
2'00" 1'00" 0'10" 0'00"  
Reset Time Beeper  
You can use the procedure below to reverse the displayed Moon phase so it  
matches the actual appearance of the Moon where you are located.  
To determine the viewing direction of the Moon, use a compass to take a  
direction reading of the Moon at its meridian passage.  
For information about the Moon phase indicator, see Moon Phase  
Indicator.  
0'10" 0'09" 0'08" 0'07" 0'06" 0'05" 0'04" 0'03" 0'02" 0'01" 0'00"  
To configure countdown timer settings  
1. While the countdown start time is on the  
display in the Countdown Timer Mode, hold  
down Euntil the countdown start time setting  
starts to flash, which indicates the setting  
screen.  
To reverse the displayed Moon phase  
1. In the Tide/Moon Data Mode, hold down E  
l
until the hour digits start to flash.  
2. Press Dtwice.  
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If the countdown start time is not displayed,  
use the procedure under To use the  
countdown timerto display it.  
2. Press Dto move the flashing in the sequence  
shown below to select other settings.  
This will cause the Moon phase indicator to  
flash. This is the indicator switching screen.  
3. Press Ato toggle the Moon phase indicator  
between the southerly view (indicated by  
) and northerly view (indicated by  
Northerly view: Moon is north of you.  
Southerly view: Moon is south of you.  
).  
Start  
Time  
Reset  
Time  
4. When the Moon phase indicator setting is the  
way you want, press Eto exit the switching  
screen and return to the Tide/Moon Data  
Mode screen.  
3. When the setting you want to change is flashing, use Aand Cto change  
it as described below.  
Setting  
Screen  
Button Operations  
Countdown Timer  
Start Time  
Use A(+) and C() to change the setting.  
You can set a start time in the range of 1 to 60  
minutes in 1-minute increments.  
Seconds  
The countdown timer can be set within a range of  
one minute to 60 minutes. An alarm sounds when  
the timer reaches zero. The press of a button will  
start the countdown timer from the currently set  
start time, and a progress beeper sounds to keep  
you informed of the current status of the  
countdown. These features make it possible to  
use the watch for yacht racing.  
Reset Time  
Use A(+) and C() to change the setting.  
You can set a reset time in the range of 1 to 5  
minutes in 1-minute increments.  
4. Press Eto exit the setting screen.  
The reset time setting must be less than the countdown start time setting.  
All of the operations in this section are  
performed in the Countdown Timer Mode,  
which you enter by pressing D.  
To turn the progress beeper on and off  
Pressing Bwhile the countdown start time is on the display or while a  
countdown timer operation is in progress in the Countdown Timer Mode  
Current  
time  
Minutes  
toggles progress beeper operation on (  
displayed) and off (  
displayed).  
Configuring Countdown Timer Settings  
The following are the settings you should configure before actually using the  
countdown timer.  
Countdown start time and reset time  
Progress beeper (on/off)  
See To configure countdown timer settingsfor information about setting up  
the timer.  
For details about the progress beeper, see Progress Beeper.  
To use the countdown timer  
In the Countdown Timer Mode, press Ato start  
the countdown timer.  
The countdown timer measurement operation  
continues even if you exit the Countdown Timer  
Mode.  
The table below describes button operations  
you can perform to control countdown  
operations.  
Reset Time  
You can set a reset time, which is a kind of alternate countdown start time  
you can recall with the press of a button any time a countdown operation is in  
progress.  
To do this:  
Stop the countdown operation  
Do this:  
Press A.  
Countdown Timer Beeper Operations  
Resume a stopped countdown operation  
Display the countdown start time  
Press Aagain.  
While the countdown is  
stopped, press C.  
The watch beeps at various times during a countdown so you can keep  
informed about the countdown status without looking at the display. The  
following describes the types of beeper operations the watch performs during  
a countdown.  
Stop the countdown operation and display the reset Press C.  
time  
Start the countdown from the displayed reset time Press A.  
7
 
Operation Guide 3135 3206  
Stopwatch  
To set an alarm time  
Hours  
The stopwatch lets you measure elapsed time,  
split times, and two finishes.  
The display range of the stopwatch is 23 hours,  
59 minutes, 59.99 seconds.  
Alarm on  
indicator  
1. In the Alarm Mode, use Aand Cto scroll  
through the alarm screens until the one whose  
time you want to set is displayed.  
A
1/100 second  
The stopwatch continues to run, restarting from  
zero after it reaches its limit, until you stop it.  
The stopwatch measurement operation  
continues even if you exit the Stopwatch Mode.  
Exiting the Stopwatch Mode while a split time is  
frozen on the display clears the split time and  
returns to elapsed time measurement.  
All of the operations in this section are  
performed in the Stopwatch Mode, which you  
enter by pressing D.  
AL1  
AL2  
AL3  
C
SIG  
AL5  
AL4  
On/Off status  
2. Hold down Euntil the hour setting of the alarm time start to flash, which  
indicates the setting screen.  
This automatically turns on the alarm.  
Minutes  
Current time  
Seconds  
3. Press Dto move the flashing between the hour and minute settings.  
4. While a setting is flashing, use A(+) and C() to change it.  
When setting the alarm time using the 12-hour format, take care to set  
the time correctly as a.m. (no indicator) or p.m. (P indicator).  
5. Press Eto exit the setting screen.  
To measure times with the stopwatch  
Elapsed Time  
J
J
J
J
A
A
A
A
C
Start  
Stop  
Re-start  
Stop  
Clear  
Alarm Operation  
The alarm sounds in all modes at the preset time for about 10 seconds, or  
until you stop it by pressing any button.  
Split Time  
A
J
J
J
J
C
C
A
C
Start  
Split  
(SPL displayed)  
Split release  
Stop  
Clear  
To test the alarm  
In the Alarm Mode, hold down Ato sound the alarm.  
Two Finishes  
To turn an alarm and the Hourly Time Signal on and off  
J
J
J
J
A
C
A
C
C
1. In the Alarm Mode, use Aand Cto select an alarm or the Hourly Time  
Signal.  
2. When the alarm or the Hourly Time Signal you want is selected, press B  
to turn it on (ON) and off (OF).  
Start  
Split  
Stop  
Split release  
Display time of  
second runner.  
Clear  
First runner Second runner  
finishes.  
Display time  
of first runner.  
finishes.  
Indicates alarm is ON.  
Indicates Hourly Time Signal is ON.  
The alarm on indicator (  
) and the Hourly Time Signal on indicator (  
)
are shown on the display in all modes while these functions are turned on.  
If any alarm is on, the alarm on indicator is shown on the display in all  
modes.  
World Time  
World Time displays the current time in 33 cities  
(29 time zones) around the world.  
Current time in the zone  
of the selected city code  
If the current time shown for a city is wrong,  
check your Home City time settings and make  
the necessary changes.  
All of the operations in this section are  
performed in the World Time Mode, which you  
enter by pressing D.  
City code  
Illumination  
Auto light switch  
on indicator  
The display of the watch is illuminated using an  
EL (electro-luminescent) panel for easy reading  
in the dark. The watchs auto light switch turns on  
illumination automatically when you angle the  
watch towards your face.  
To view the time in another city  
In the World Time Mode, use A(east) and C  
(west) to scroll through city codes (time zones).  
For full information on city codes, see the City  
Code Table.  
The auto light switch must be turned on  
(indicated by the auto light switch on indicator)  
for it to operate.  
See Illumination Precautionsfor other  
important information about using illumination.  
Timekeeping  
Mode time  
To toggle a city code time between Standard Time and Daylight  
Saving Time  
To turn on illumination manually  
Press Lin any mode to illuminate the display for about one second.  
The above operation turns on illumination regardless of the current auto  
light switch setting.  
1. In the World Time Mode, use A(east) and C  
DST indicator  
(west) to display the city code (time zone)  
whose Standard Time/Daylight Saving Time  
setting you want to change.  
Illumination is disabled while configuring sensor measurement mode  
settings, and during bearing sensor calibration.  
2. Hold down Eto toggle between Daylight  
Saving Time (DST indicator displayed) and  
Standard Time (DST indicator not displayed).  
The DST indicator appears on the display  
whenever you display a city code for which  
Daylight Saving Time is turned on.  
About the Auto Light Switch  
Turning on the auto light switch causes illumination to turn on, whenever you  
position your wrist as described below in any mode.  
Note that this watch features a Full Auto EL Light, so the auto light switch  
operates only when available light is below a certain level. It does not  
illuminate the display under bright light.  
The auto light switch is always disabled, regardless of its on/off setting,  
when any one of the following conditions exists.  
While an alarm is sounding  
You cannot toggle between Daylight Saving Time and Standard Time if the  
displayed city code is UTC.  
Note that the DST/Standard Time setting affects only the currently  
displayed city code. Other city codes are not affected.  
During sensor measurement  
While a bearing sensor calibration operation is being performed in the  
Digital Compass Mode  
During tide data calculation  
Alarms  
You can set five independent daily alarms. When  
an alarm is turned on, the alarm tone sounds  
when the alarm time is reached.  
Moving the watch to a position that is parallel to the ground and then tilting  
it towards you more than 40 degrees causes illumination to turn on.  
Wear the watch on the outside of your wrist.  
Alarm number  
You also can turn on an Hourly Time Signal,  
which will cause the watch to beep twice every  
hour on the hour.  
The alarm number (AL1 through AL5)  
indicates an alarm screen. SIG is shown when  
the Hourly Time Signal screen is on the display.  
When you enter the Alarm Mode, the data you  
were viewing when you last exited the mode  
Parallel to  
More than  
ground  
40°  
Alarm time  
(Hour : Minute)  
appears first.  
All of the operations in this section are  
performed in the Alarm Mode, which you enter  
Current time  
by pressing D.  
8
 
Operation Guide 3135 3206  
Warning!  
There are two standard methods of expressing altitude: Absolute altitude and  
relative altitude. Absolute altitude expresses an absolute height above sea  
level. Relative altitude expresses the difference between the height of two  
different places.  
Always make sure you are in a safe place whenever you are reading  
the display of the watch using the auto light switch. Be especially  
careful when running or engaged in any other activity that can result  
in accident or injury. Also take care that sudden illumination by the  
auto light switch does not startle or distract others around you.  
When you are wearing the watch, make sure that its auto light switch  
is turned off before riding on a bicycle or operating a motorcycle or  
any other motor vehicle. Sudden and unintended operation of the auto  
light switch can create a distraction, which can result in a traffic  
accident and serious personal injury.  
Height of building 130 m Rooftop at an altitude of  
(relative altitude)  
230 m above sea level  
(absolute altitude)  
To turn the auto light switch on and off  
In the Timekeeping Mode, hold down Lfor about three seconds to toggle the  
auto light switch on (A.EL displayed) and off (A.EL not displayed).  
The auto light switch on indicator (A.EL) is on the display in all modes while  
the auto light switch is turned on.  
The auto light switch turns off automatically whenever battery power drops  
to Level 4.  
Sea Level  
Precautions Concerning Simultaneous Measurement of Altitude and  
Temperature  
Though you can perform altitude and temperature measurements at the same  
time, you should remember that each of these measurements requires  
different conditions for best results. With temperature measurement, it is best  
to remove the watch from your wrist in order to eliminate the effects of body  
heat. In the case of altitude measurement, on the other hand, it is better to  
leave the watch on your wrist, because doing so keeps the watch at a  
constant temperature, which contributes to more accurate altitude  
measurements.  
To give altitude measurement priority, leave the watch on your wrist or in  
any other location where the temperature of the watch is kept constant.  
To give temperature measurement priority, remove the watch from your  
wrist and allow it to hang freely from your bag or in another location where  
it is not exposed to direct sunlight. Note that removing the watch from your  
wrist can affect pressure sensor readings momentarily.  
Illumination may not turn on right away if you raise the watch to your face  
while a barometric pressure or altitude measurement operation is in  
progress.  
Questions & Answers  
Question: What causes incorrect direction readings?  
Answer:  
Incorrect bidirectional calibration. Perform bidirectional calibration.  
Nearby source of strong magnetism, such as a household appliance, a  
large steel bridge, a steel beam, overhead wires, etc., or an attempt to  
perform direction measurement on a train, boat, etc. Move away from large  
metal objects and try again. Note that digital compass operation cannot be  
performed inside a train, boat, etc.  
Question: What causes different direction readings to produce different  
results at the same location ?  
Answer: Magnetism generated by nearby high-tension wires is interfering with  
detection of terrestrial magnetism. Move away from the high-tension  
wires and try again.  
Power Supply  
This watch is equipped with a solar cell and a special rechargeable battery  
(secondary battery) that is charged by the electrical power produced by the  
solar cell. The illustration shown below shows how you should position the  
watch for charging.  
Question: Why am I having problems taking direction readings indoors ?  
Answer: A TV, personal computer, speakers, or some other object is  
interfering with terrestrial magnetism readings. Move away from the  
object causing the interference or take the direction reading  
outdoors. Indoor direction readings are particularly difficult inside  
ferro-concrete structures. Remember that you will not be able to take  
direction readings inside of trains, airplanes, etc.  
Solar cell  
Example: Orient the watch so its face is  
pointing at a light source.  
The illustration shows how to position a  
watch with a resin band.  
Note that charging efficiency drops when  
any part of the solar cell is blocked by  
clothing, etc.  
Question: How can the barometer be used to predict weather?  
Answer: Barometric pressure indicates changes in the atmosphere, and by  
monitoring these changes you can predict the weather with  
reasonable accuracy. Rising atmospheric pressure indicates good  
weather, while falling pressure indicates deteriorating weather  
conditions.  
You should try to keep the watch outside  
of your sleeve as much as possible.  
Charging is reduced significantly if the  
face is covered only partially.  
Important!  
Storing the watch for long periods in an area where there is no light or  
wearing it in such a way that it is blocked from exposure to light can cause  
rechargeable battery power to run down. Be sure that the watch is exposed  
to bright light whenever possible.  
The barometric pressures that you see in the newspaper and on the  
TV weather report are measurements corrected to values measured  
at 0 m sea level.  
Question: How does the altimeter work?  
This watch uses a special rechargeable battery to store power produced by  
the solar cell, so regular battery replacement is not required. However, after  
very long use, the rechargeable battery may lose its ability to achieve a full  
charge. If you experience problems getting the special rechargeable battery  
to charge fully, contact your dealer or CASIO distributor about having it  
replaced.  
Answer: Generally, air pressure and temperature decrease as altitude  
increases.This watch bases its altitude measurements on  
International Standard Atmosphere (ISA) values stipulated by the  
International Civil Aviation Organization (ICAO). These values define  
relationships between altitude, air pressure, and temperature.  
Never try to remove or replace the watchs special battery yourself. Use of  
the wrong type of battery can damage the watch.  
Altitude  
Air Pressure  
Temperature  
All data stored in memory is deleted, and the current time and all other  
settings return to their initial factory defaults whenever battery power drops  
to Level 5 and when you have the battery replaced.  
The Home City setting reverts to the initial default of TYO (Tokyo)  
whenever the battery power level drops to Level 5 or when you have the  
rechargeable battery replaced. If this happens, change the Home City to  
the setting you want.  
616 hPa  
701 hPa  
795 hPa  
899 hPa  
1013 hPa  
11°C  
About 8 hPa per 100 m  
About 9 hPa per 100 m  
4000 m  
3500 m  
2500 m  
1500 m  
500 m  
4.5°C  
3000 m  
2000 m  
About 6.5°C  
per 1000 m  
2°C  
8.5°C  
15°C  
About 10 hPa per 100 m  
About 11 hPa per 100 m  
1000 m  
0 m  
About 12 hPa per 100 m  
Turn on the watchs Power Saving function and keep it in an area normally  
exposed to bright light when storing it for long periods. This helps to keep  
the rechargeable battery from going dead.  
14000 ft  
12000 ft  
10000 ft  
8000 ft  
19.03 inHg  
22.23 inHg  
25.84 inHg  
29.92 inHg  
16.2°F  
30.5°F  
44.7°F  
59.0°F  
About 0.15 inHg per 200 ft  
About 0.17 inHg per 200 ft  
About 0.192 inHg per 200 ft  
About 3.6°F  
per 1000 ft  
6000 ft  
2000 ft  
4000 ft  
0 ft  
About 0.21 inHg per 200 ft  
Source: International Civil Aviation Organization  
Note that the following conditions will prevent you from obtaining accurate  
altitude readings:  
When air pressure changes because of changes in the weather  
Extreme temperature changes  
When the watch itself is subjected to strong impact  
9
 
Operation Guide 3135 3206  
Recovery Times  
Battery Power Indicators  
The table below shows the amount exposure that is required to take the  
battery from one level to the next.  
The battery power indicator on the display shows you the current status of the  
rechargeable batterys power.  
Approximate Exposure Time  
Exposure Level  
(Brightness)  
Level Battery Power  
Indicator  
Function Status  
Level 5 Level 4 Level 3  
Level 2  
Level 1  
4 hours  
19 hours  
38 hours  
1
All functions enabled.  
All functions enabled.  
Outdoor Sunlight  
(50,000 lux)  
1 hour  
4 hours  
6 hours  
14 hours  
68 hours  
137 hours  
2
l
3
Illumination, beeper, and  
sensor operation disabled.  
Sunlight Through a  
Window (10,000 lux)  
l
l
Battery power  
indicator  
l
l l  
Daylight Through a  
Window on a Cloudy  
Day (5,000 lux)  
(Charge Soon Alert)  
l
4
Except for timekeeping and  
the C (charge) indicator, all  
functions and display  
l
l
Indoor Fluorescent  
Lighting (500 lux)  
61 hours  
- - - - - - - - - - - - - - - -  
l l  
(Charge Soon Alert) indicators disabled.  
The above exposure time values are all for reference only. Actual required  
5
All functions disabled.  
exposure times depend on lighting conditions.  
The flashing LOW indicator at Level 3 tells you that battery power is very  
low, and that exposure to bright light for charging is required as soon as  
possible.  
Reference  
At Level 5, all functions are disabled and settings return to their initial  
factory defaults. Once the battery reaches Level 2 (indicated by M indicator)  
after falling to Level 5, reconfigure the current time, date, and other  
settings.  
This section contains more detailed and technical information about watch  
operation. It also contains important precautions and notes about the various  
features and functions of this watch.  
Display indicators reappear as soon as the battery is charged from Level 5  
Moon Phases and Moon Age  
to Level 2.  
The Moon goes through a regular 29.53-day cycle. During each cycle, the  
Moon appears to wax and wane as the relative positioning of the Earth,  
Moon, and Sun changes. The greater the angular distance between the Moon  
and the Sun,* the more we see illuminated.  
Leaving the watch exposed to direct sunlight or some other very strong light  
source can cause the battery power indicator to show a reading temporarily  
that is higher than the actual battery level. The correct battery level should  
be indicated after a few minutes.  
* The angle to the Moon in relation to the direction at which the Sun is visible  
from the Earth.  
This watch performs a rough calculation of the current Moon age starting  
from day 0 of the moon age cycle. Since this watch performs calculations  
using integer values only (no fractions), the margin for error of the displayed  
Moon age is 1 day.  
Performing multiple sensor, illumination, or  
beeper operations during a short period may  
cause all of the battery indicators (L, M, H) to  
l
flash on the display. Illumination, alarm,  
l
countdown timer alarm, hourly time signal, and  
Moon Phase Indicator  
sensor operations will be disabled until battery  
power recovers.  
After some time, battery power will recover and  
battery indicators (L, M, H) will disappear,  
indicating that the above functions are enabled  
again.  
The Moon phase indicator of this watch indicates  
the current phase of the Moon as shown below. It  
Moon Phase indicator  
is based on the view of the left side of the moon  
at meridian transit from the northern hemisphere  
of the Earth. If the appearance of the Moon  
phase indicator is reversed from the actual Moon  
as viewed from your location, you can use the  
procedure under To reverse the displayed Moon  
phaseto change the indicator.  
Even if battery power is at Level 1 or Level 2, the Digital Compass Mode,  
Barometer/Thermometer Mode, or Altimeter Mode sensor may be disabled  
if there is not enough voltage available to power it sufficiently. This is  
indicated by battery indicators (L, M, H) on the display.  
If battery indicators (L, M, H) appears frequently, it probably means that  
remaining battery power is low. Leave the watch in bright light to allow it to  
charge.  
(part you cannot see)  
Charging Precautions  
Certain charging conditions can cause the watch to become very hot. Avoid  
leaving the watch in the areas described below whenever charging its  
rechargeable battery. Also note that allowing the watch to become very hot  
can cause its liquid crystal display to black out. The appearance of the LCD  
should become normal again when the watch returns to a lower temperature.  
Moon phase  
(part you can see)  
Module 3135  
Module 3206  
Module  
Warning!  
Moon  
Phase  
Indicator  
3135  
Leaving the watch in bright light to charge its rechargeable battery can  
cause it to become quite hot.Take care when handling the watch to  
avoid burn injury.The watch can become particularly hot when exposed  
to the following conditions for long periods.  
On the dashboard of a car parked in direct sunlight  
Too close to an incandescent lamp  
Module  
3206  
28.7-29.5 1.0-2.7 2.8-4.6 4.7-6.4 6.5-8.3 8.4-10.1 10.2-12.0 12.1-13.8  
0.0-0.9  
Moon Age  
Under direct sunlight  
Moon Phase  
New Moon  
First Quarter (Waxing)  
Charging Guide  
Module  
After a full charge, timekeeping remains enabled for up to about five months.  
The following table shows the amount of time the watch needs to be  
exposed to light each day in order to generate enough power for normal  
daily operations.  
Moon  
Phase  
Indicator  
3135  
Module  
3206  
Exposure Level (Brightness)  
Approximate  
Exposure Time  
Moon Age  
13.9-15.7 15.8-17.5 17.6-19.4 19.5-21.2 21.3-23.1 23.2-24.9 25.0-26.8 26.9-28.6  
Outdoor Sunlight (50,000 lux)  
5 minutes  
Moon Phase  
Full Moon  
Last Quarter (Waning)  
Sunlight Through a Window (10,000 lux)  
24 minutes  
Daylight Through a Window on a Cloudy Day (5,000 lux) 48 minutes  
Indoor Fluorescent Lighting (500 lux)  
Tidal Movements  
Tides are the periodic rise and fall of the water of oceans, seas, bays, and  
other bodies of water caused mainly by the gravitational interactions between  
the Earth, Moon and Sun. Tides rise and fall about every six hours. The Tide  
Graph of this watch indicates tidal movement based on the Moons transit  
over a meridian and the lunitidal interval. The Tide Graph calculates and  
graphically represents current tide conditions in your Home City or a port city  
in the vicinity of the Home City based on longitudes, lunar day length, and  
lunitidal interval preset in watch memory, and on high tide times specified by  
you.  
8 hours  
For details about the battery operating time and daily operating conditions,  
see the Power Supplysection of the Specifications.  
Stable operation is promoted by frequent exposure to light.  
10  
 
Operation Guide 3135 3206  
Tide Graph  
Button Operation Tone  
The Tide Graph graphically represents the current tide condition using one of  
three patterns that represent spring tide, intermediate tide, and neap tide, as  
shown below.  
The button operation tone sounds any time you  
press one of the watchs buttons.You can turn the  
button operation tone on or off as desired.  
Even if you turn off the button operation tone,  
the alarm, Hourly Time Signal, and Countdown  
Timer Mode alarm all operate normally.  
Mute indicator  
Tide Name  
Spring Tide  
Graph  
Description  
Large difference between  
high tide and low tide. Occurs  
a few days before and after a  
New Moon and Full Moon.  
To turn the button operation tone on and off  
In any mode (except when a setting screen is on  
the display), hold down Dto toggle the button  
operation tone on ( not displayed) and off (  
displayed).  
Intermediate Tide  
Neap Tide  
Medium difference between  
high tide and low tide.  
Small difference between  
high tide and low tide. Occurs  
a few days before and after  
the first quarter and last  
quarter of a half moon.  
Since the Dbutton also is the mode change button, holding it down to turn  
the button operation on or off also causes the watchs current mode to  
change.  
The indicator is displayed in all modes when the button operation tone is  
turned off.  
The Tide Graph flashes as shown below to indicate the tide range.  
Power Saving  
When turned on, Power Saving enters a sleep  
state automatically whenever the watch is left for  
a certain period in an area where it is dark. The  
table below shows how watch functions are  
affected by Power Saving.  
l
There actually are two sleep state levels:  
display sleepand function sleep.  
High tide  
Low tide  
High tide  
The segments on either end of the Tide Graph flash during high tide.  
Elapsed Time in  
Dark  
Display  
Operation  
Lunitidal Interval  
Theoretically, high tide is at the Moons transit over the meridian and low tide  
is about six hours later. Actual high tide occurs somewhat later, due to factors  
such as viscosity, friction, and underwater topography. Both the time  
differential between the Moons transit over the meridian until high tide and  
the time differential between the Moons transit over the meridian until low tide  
are known as the lunitidal interval.  
60 to 70 minutes  
(Display Sleep)  
6 or 7 days  
(Function Sleep)  
Blank, with  
Display is off, but all functions are  
enabled.  
PS flashing  
Blank, with  
All functions are disabled, but  
timekeeping is maintained.  
flashing  
PS not  
Wearing the watch inside the sleeve of clothing can cause it to enter the  
sleep state.  
Auto Return Features  
The watch will not enter the sleep state while the digital time is between  
6:00 AM and 9:59 PM. If the watch is already in the sleep state when the  
digital time reaches 6:00 AM, however, it will remain in the sleep state.  
The watch will not enter the sleep state while it is in the Digital Compass,  
Barometer/Thermometer, Altimeter, Countdown Timer, or Stopwatch Mode.  
When the watch is left in any mode besides the Countdown Timer and  
Stopwatch Mode, it will return to the Timekeeping Mode automatically after  
a specific amount of time. Then if left in the dark for the elapsed time  
indicated in the table above, the watch will enter the sleep state.  
The watch returns to the Timekeeping Mode automatically if you do not  
perform any button operation for two or three minutes in the Tide/Moon  
Data, Alarm, Data Recall, Digital Compass, or Barometer/Thermometer  
Mode.  
If you do not perform any button operation while in the Altimeter Mode, the  
watch returns to the Timekeeping Mode automatically after nine or 10  
hours.  
If you leave a screen with flashing digits on the display for two or three  
minutes without performing any operation, the watch exits the setting  
screen automatically.  
To recover from the sleep state  
Perform any one of the following operations.  
Move the watch to a well-lit area. It can take up to two seconds for the  
display to turn on.  
Press any button.  
Angle the watch towards your face for reading.  
Initial Screens  
When you enter the World Time or Alarm Mode, the data you were viewing  
when you last exited the mode appears first.  
Scrolling  
The Aand Cbuttons are used on the setting screen to scroll through data  
on the display. In most cases, holding down these buttons during a scroll  
operation scrolls through the data at high speed.  
To turn Power Saving on and off  
1. In the Timekeeping Mode, hold down Euntil  
the city code starts to flash, which indicates  
the setting screen.  
2. Press Dnine times until the Power Saving  
on/off screen appears.  
3. Press Ato toggle Power Saving on (ON) and  
off (OFF).  
Sensor Malfunction Indicator  
Subjecting the watch to strong impact can cause sensor malfunction or  
improper contact of internal circuitry. When this happens,  
appear on the display and sensor operations will be disabled.  
If ERR appears while a measurement operation is being performed in a  
sensor mode, restart the measurement. If ERR appears on the display  
again, it can mean there is something wrong with the sensor.  
Even if battery power is at Level 1 or Level 2, the Digital Compass Mode,  
Barometer/Thermometer Mode, or Altimeter Mode sensor may be disabled  
if there is not enough voltage available to power it sufficiently. In this case,  
ERR will appear on the display. This does not indicate malfunction, and  
sensor operation should resume once battery voltage returns to its normal  
level.  
ERR  
(error) will  
4. Press E to exit the setting screen.  
The Power Saving on indicator (PS) is on the  
display in all modes while Power Saving is  
turned on.  
Power Saving on  
indicator  
Timekeeping  
00  
Resetting the seconds to  
while the current count is in the range of 30 to  
59 causes the minutes to be increased by 1. In the range of 00 to 29, the  
seconds are reset to  
00  
without changing the minutes.  
If ERR keeps appearing during measurement, it could mean there is a  
problem with the applicable sensor.  
With the 12-hour format, the P (PM) indicator appears on the display for  
times in the range of noon to 11:59 p.m. and no indicator appears for times  
in the range of midnight to 11:59 a.m.  
Whenever you have a sensor malfunction, be sure to take the watch to  
your original dealer or nearest authorized CASIO distributor as soon as  
possible.  
With the 24-hour format, times are displayed in the range of 0:00 to 23:59,  
without any indicator.  
The 12-hour/24-hour timekeeping format you select in the Timekeeping  
Mode is applied in all modes.  
The watchs built-in full automatic calendar makes allowances for different  
month lengths and leap years. Once you set the date, there should be no  
reason to change it except when battery power drops to Level 5.  
The times for the Timekeeping Mode and all the city codes of the World  
Time Mode are calculated in accordance with each citys UTC offset.  
The UTC offset is a value that indicates the time difference between a  
reference point in Greenwich, England and the time zone where a city is  
located.  
11  
 
Operation Guide 3135 3206  
The letters UTCis the abbreviation for Universal Time Coordinated,  
To calibrate the pressure sensor and the temperature sensor  
which is the world-wide scientific standard of timekeeping. It is based upon  
carefully maintained atomic (cesium) clocks that keep time accurately to  
within microseconds. Leap seconds are added or subtracted as necessary  
to keep UTC in sync with the Earths rotation.  
1. Press Bto enter the Barometer/  
Thermometer Mode.  
2. In the Barometer/Thermometer Mode, hold  
down Efor about two seconds until either  
OFF or the reference temperature value starts  
to flash. This is the setting screen.  
If you want to calibrate the barometric  
pressure sensor, press Dto move the  
flashing to the middle display area. This is  
the pressure sensor calibration screen.  
At this time, OFF or the barometric pressure  
Illumination Precautions  
The electro-luminescent panel that provides illumination loses power after  
very long use.  
Illumination may be hard to see when viewed under direct sunlight.  
Illumination turns off automatically whenever an alarm sounds.  
The watch may emit an audible sound whenever the display is illuminated.  
This is due to vibration of the EL panel used for illumination, and does not  
indicate malfunction.  
value should be flashing on the display.  
3. Use A(+) and C() to set the calibration  
value in the units shown below.  
l
Frequent use of illumination runs down the battery.  
Temperature  
Barometric Pressure  
0.1°C (0.2°F)  
1 hPa (0.05 inHg)  
Auto light switch precautions  
The auto light switch is turned off automatically whenever battery power is  
OFFis displayed while the reference  
temperature value and barometric pressure  
value are zero (0).  
at Level 4.  
Wearing the watch on the inside of your wrist, movement of your arm, or  
vibration of your arm can cause frequent activation of the auto light switch  
and illumination of the display. To avoid running down the battery, turn off  
the auto light switch whenever engaging in activities that might cause  
frequent illumination of the display.  
Pressing Aand Cat the same time returns to the factory calibration  
(OFF).  
4. Press Eto return to the Barometer/Thermometer Mode screen.  
Note that wearing the watch under your sleeve while the auto light switch is  
turned on can cause frequent illumination of the display and can run down  
the battery.  
To select the temperature, barometric pressure, and altitude units  
1. Enter the Timekeeping Mode.  
2. Hold down Euntil the city code starts to  
flash, which indicates the setting screen.  
3. Use Dto select the setting screen for the unit  
you want to change.  
See step 3 under To set the time and date”  
for information about how to scroll through  
setting screens.  
Illumination may not turn on if the face of the  
watch is more than 15 degrees above or below  
parallel. Make sure that the back of your hand  
is parallel to the ground.  
Illumination turns off in about one second, even  
if you keep the watch pointed towards your  
face.  
More than 15 degrees  
too high  
4. Press Ato change the unit setting.  
Each press of Achanges the selected unit setting as shown below.  
Static electricity or magnetic force can interfere with proper operation of the  
auto light switch. If illumination does not turn on, try moving the watch back  
to the starting position (parallel with the ground) and then tilt it back towards  
your face 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, illumination does not turn on until about one  
second after you turn the face of the watch towards you. This does not  
necessarily indicate malfunction.  
Temperature  
Altitude  
Barometric Pressure  
°C and °F  
m and ft  
hPa and inHg  
5. After the settings are the way you want, press Eto exit the setting screen.  
Specifications  
Accuracy at normal temperature: 20 seconds a month  
Timekeeping: Hour, minute, second, p.m. (P), month, day, day of the week  
Time format: 12-hour and 24-hour  
You may notice a very faint clicking sound coming from the watch when it is  
shaken back and forth. This sound is caused by mechanical operation of  
the auto light switch, and does not indicate a problem with the watch.  
Barometer and Thermometer Precautions  
Calendar system: Full Auto-calendar pre-programmed from the year  
2000 to 2099  
Other: 2 display formats (Day of the Week, Barometric Pressure Graph);  
Home City code (can be assigned one of 33 city codes); Standard  
Time / Daylight Saving Time (summer time)  
The pressure sensor built into this watch measures changes in air  
pressure, which you can then apply to your own weather predictions. It is  
not intended for use as a precision instrument in official weather prediction  
or reporting applications.  
Sudden temperature changes can affect pressure sensor readings.  
Temperature measurements are affected by your body temperature (while  
you are wearing the watch), direct sunlight, and moisture. To achieve a  
more accurate temperature measurement, remove the watch from your  
wrist, place it in a well ventilated location out of direct sunlight, and wipe all  
moisture from the case. It takes approximately 20 to 30 minutes for the  
case of the watch to reach the actual surrounding temperature.  
Digital Compass: 20 seconds continuous measurement; 16 directions;  
Angle value 0° to 359°; Four direction pointers; Calibration  
(bidirectional, northerly); Magnetic declination correction  
Barometer:  
Measurement and display range:  
260 to 1,100 hPa (or 7.65 to 32.45 inHg)  
Display unit: 1 hPa (or 0.05 inHg)  
Measurement timing: Daily from midnight, at two hour intervals (12 times  
per day); Every five seconds in the Barometer/Thermometer Mode  
Other: Calibration; Manual measurement (button operation); Barometric  
pressure graph  
Pressure Sensor and Temperature Sensor Calibration  
The pressure sensor and temperature sensor built into the watch are  
calibrated at the factory and normally require no further adjustment. If you  
notice serious errors in the pressure readings and temperature readings  
produced by the watch, you can calibrate the sensor to correct the errors.  
Thermometer:  
Measurement and display range: 10.0 to 60.0°C (or 14.0 to 140.0°F)  
Important!  
Display unit: 0.1°C (or 0.2°F)  
Incorrectly calibrating the barometric pressure sensor can result in incorrect  
readings. Before performing the calibration procedure, compare the  
readings produced by the watch with those of another reliable and accurate  
barometer.  
Measurement timing: Every five seconds in the Barometer/Thermometer  
Mode  
Other: Calibration; Manual measurement (button operation)  
Altimeter:  
Incorrectly calibrating the temperature sensor can result in incorrect  
readings. Carefully read the following before doing anything.  
Compare the readings produced by the watch with those of another  
reliable and accurate thermometer.  
Measurement range: 700 to 10,000 m (or 2,300 to 32,800 ft.) without  
reference altitude  
Display range: 10,000 to 10,000 m (or 32,800 to 32,800 ft.)  
Negative values can be caused by readings produced based on a  
reference altitude or due to atmospheric conditions.  
Display unit: 5 m (or 20 ft.)  
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.  
Current Altitude Data: 5-second interval for first 3 minutes followed by 2-  
minute interval for next 9 or 10 hours  
Altitude Memory Data: 24 altitude records and one high altitude record  
Altitude records: Pressing a button records the current altitude value,  
along with the date (month-day) of the reading.  
High altitude record: Automatically records the highest altitude value  
measured in the Altimeter Mode to date, along with the date (month-  
day) of the reading.  
Other: Reference altitude setting; Altitude graph  
12  
 
Operation Guide 3135 3206  
City Code Table  
Bearing Sensor Precision:  
City  
Code  
UTC Offset/  
GMT Differential  
City  
UTC Offset/  
Direction: Within 10°  
City  
City  
Code  
GMT Differential  
Values are guaranteed for a temperature range of 10°C to 40°C (14°F  
to 104°F).  
PPG  
HNL  
ANC  
LAX  
DEN  
CHI  
Pago Pago  
Honolulu  
Anchorage  
Los Angeles  
Denver  
11  
10  
9  
8  
7  
6  
5  
4  
3  
JED  
THR  
DXB  
KBL  
KHI  
DEL  
DAC  
RGN  
BKK  
HKG  
SEL  
TYO  
ADL  
SYD  
NOU  
WLG  
Jeddah  
Tehran  
Dubai  
Kabul  
Karachi  
Delhi  
+3  
+3.5  
+4  
+4.5  
+5  
+5.5  
+6  
+6.5  
+7  
North pointer: Within 2 digital segments  
Pressure Sensor Precision:  
Conditions  
Chicago  
Altimeter  
Barometer  
NYC  
New York  
Dhaka  
(Altitude)  
CCS*  
Caracas  
Yangon  
Bangkok  
Hong Kong  
Seoul  
Fixed  
tempera-  
0 to 6000 m  
0 to 19680 ft.  
(altitude differential × 3%  
+ 30 m) m  
(altitude differential × 3%  
+ 100 ft.) ft.  
(pressure differential × 3%  
+ 3 hPa) hPa  
(pressure differential × 3%  
+ 0.0885 inHg) inHg  
RIO Rio De Janeiro  
Fernando de  
+8  
2  
FEN  
ture  
Noronha  
+9  
RAI  
UTC  
LON  
PAR  
BER  
ATH  
CAI  
Praia  
1  
0
Tokyo  
6000 to 10000 m  
19680 to 32800 ft. + 45 m) m  
(altitude differential × 3%  
Adelaide  
Sydney  
Noumea  
Wellington  
+9.5  
+10  
+11  
London  
Paris  
Berlin  
Athens  
Cairo  
(altitude differential × 3%  
+ 150 ft.) ft.  
+1  
+2  
+12  
Effect of  
variable  
tempera-  
ture  
0 to 6000 m  
0 to 19680 ft.  
80 m every 10°C  
264 ft. every 50°F  
120 m every 10°C  
396 ft. every 50°F  
6 hPa every 10°C  
0.177 inHg every 50°F  
JRS  
Jerusalem  
6000 to 10000 m  
19680 to 32800 ft.  
Based on data as of December 2008.  
The rules governing global times (GMT differential and UTC offset) and  
Values are guaranteed for a temperature range of 10°C to 40°C (14°F to  
104°F).  
Precision is lessened by strong impact to either the watch or the sensor,  
and by temperature extremes.  
summer time are determined by each individual country.  
* In December 2007, Venezuela changed its offset from 4.0 to 4.5. Note  
however, that this watch displays an offset of 4.0 (the old offset) for the  
CCS (Caracas, Venezuela) city code.  
Temperature Sensor Precision:  
2°C ( 3.6°F) in range of 10°C to 60°C (14.0°F to 140.0°F)  
Tide/Moon Data:  
Moon phase indicator for specific date; Tide level for specific date and time  
Other: High tide time adjustment; Moon phase reversal  
Countdown Timer:  
Measuring unit: 1 second  
Countdown range: 60 minutes  
Setting ranges: Countdown start time (1 to 60 minutes, 1-minute increments);  
Reset time (1 to 5 minutes, 1-minute increments)  
Other: Progress beeper  
Stopwatch:  
Measuring unit: 1/100 second  
Measuring capacity: 23:59' 59.99''  
Measuring modes: Elapsed time, split time, two finishes  
Alarms: 5 Daily alarms; Hourly time signal  
WorldTime: 33 cities (29 time zones)  
Other: Daylight Saving Time/Standard Time  
Illumination: EL Backlight (electro-luminescent panel); Auto Light Switch  
(Full Auto EL Light operates only in the dark)  
Other: Battery power indicator; Power Saving; Low-temperature resistance  
(10°C/14°F); Button operation tone on/off  
Power Supply: Solar cell and one rechargeable battery  
Approximate battery operating time: 5 months (from full charge to  
Level 4) under the following conditions:  
Watch not exposed to light  
Internal timekeeping  
Display on 18 hours per day, sleep state 6 hours per day  
1 illumination operation (1.5 seconds) per day  
10 seconds of alarm operation per day  
10 digital compass operations per week  
10 hours of altimeter measurement at 2-minutes interval, once per month  
2 hours of barometric pressure measurement per day  
Frequent use of illumination runs down the battery. Particular care is  
required when using the auto light switch.  
20 months when the watch is left in the sleep state (display off) after a  
full charge.  
13  
 

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