Casio Pag240t7 Manual

							1
Operation Guide 3173 3246
Congratulations upon your selection of this CASIO watch.
ApplicationsThe built-in sensors of this watch measure direction, barometric pressur\
e, temperature and altitude. 
Measured values are then shown on the display. Such features make this w\
atch useful when hiking, 
mountain climbing, or when engaging in other such outdoor activities.Warning !
• The measurement functions built into this watch are not intended for ta\
king measurements that require professional or industrial precision. Values produced by this wa\
tch should be considered 
as reasonable representations only.
• When engaging in mountain climbing or other activities in which losing \
your way can create a dangerous or life-threatening situation, always use a second compass to \
confi rm direction 
readings.
• Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any da\
mage or loss suffered by you or any third party arising through the use of this produ\
ct or its malfunction.
About This Manual
• The operational procedures for Modules 3173 and 3246 are identical. All\
 of the illustrations in this manual show Module 3173.
• Depending on the model of your watch, display text appears either as da\
rk fi gures on a light background, or light fi gures on a dark background. All sample displays in this manual are shown\
 using 
dark fi gures on a light background.
• Button operations are indicated using the letters shown in the illustra\
tion.• Note that the product illustrations in this manual are intended for ref\
erence only, and so the actual product may appear somewhat different than depicted by an illustration.
Things to check before using the watch
1. Check the battery power level.
Is “ H
” or “ M
” displayed for the battery power indicator?
Go to step 2.
Power is low.
 Charge the watch by placing it in a location 
where it is exposed to light. For details, see “Charging the 
Watch” . NO YES
YES
Does any one of the following conditions exist?
•
 Battery power indicator shows “ L
” and “ LOW
” is displayed in the 
upper left corner of the screen.
•  “ C
” is displayed in the lower left corner of the screen.
•  The face is blank. The watch is charged 
sufficiently.
For details about 
charging, see 
“Charging the Watch” .
NEXT
Battery power 
indicator
2. Check the Home City and the daylight saving time (DST) setting.
Use the procedure under “To confi gure Home City settings” to confi gure your Home City and daylight 
saving time settings.
Important!
World Time Mode and Sunrise/Sunset Mode data depend on correct Home City\
, time, and date settings 
in the Timekeeping Mode. Make sure you confi gure these settings correctly.
3. Set the current time.
See “Confi guring Current Time and Date Settings”.
The watch is now ready for use.
Charging the Watch
The face of the watch is a solar cell that generates power from light. T\
he generated power charges a 
built-in rechargeable battery, which powers watch operations. The watch \
charges whenever it is exposed 
to light.
Charging Guide
Whenever you are not wearing the 
watch, leave it in a location where it 
is exposed to light.
• Best charging performance is  achieved by exposing the watch to 
the strongest light available.
When wearing the watch, make sure 
that its face is not blocked from light 
by the sleeve of your clothing.
• The watch may enter a sleep state if its face is blocked by your sleeve 
even only partially.
Warning!
Leaving the watch in bright light for charging can cause it to become qu\
ite hot.
Take care when handling the watch to avoid burn injury. The watch can be\
come 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• Under direct sunlight
Important!
• Allowing the watch to become very hot can cause its liquid crystal disp\
lay to black out. The  appearance of the LCD should become normal again when the watch returns \
to a lower temperature.
• Turn on the watch’s Power Saving function and keep it in an area nor\
mally exposed to bright light when storing it for long periods. This helps to ensure that power does not ru\
n down.
• Storing the watch for long periods in an area where there is no light o\
r wearing it in such a way that it is blocked from exposure to light can cause power to run down. Expose the w\
atch to bright light 
whenever possible.
(Light)
(Light)
(Light)
Module 3173 (Light)
Module 3246(Light)
(Light)
(Light)
Module 3173 (Light)
Module 3246
Power LevelsYou can get an idea of the watch’s power level by observing the batte\
ry power indicator on the display.
Level Battery Power Indicator Function Status 1
(H)
All functions enabled.
2
(M)
All functions enabled.
3
(L)
llllllllllllllllllIllumination, beeper, and sensor operation 
disabled.
4
(C)
Except for timekeeping and the  C
 (charge) 
indicator, all functions and display 
indicators disabled.
5
All functions disabled.
• The fl ashing  LOW
 indicator at Level 3 ( L
) tells you that battery power is very low, and that exposure to 
bright light for charging is required as soon as possible.
• At Level 5, all functions are disabled and settings return to their ini\
tial factory defaults. Once the battery  reaches Level 2 ( M
) after falling to Level 5, reconfi gure the current time, date, and other settings.
• Display indicators reappear as soon as the battery is charged from Leve\
l 5 to Level 2 ( M
).• 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 tha\
n the actual battery level. The 
correct battery level should be indicated after a few minutes.
• All data stored in memory is deleted, and the current time and all othe\
r settings return to their initial 
factory defaults whenever battery power drops to Level 5 and when you ha\
ve the battery replaced.
Power Recovery Mode• Performing multiple sensor, illumination, or beeper operations during a\
 short period may cause all of the battery power indicators ( H
,M
, and  L
) to start fl ashing on the display. This indicates that the watch 
is in the power recovery mode. Illumination, alarm, countdown timer alar\
m, hourly time signal, and 
sensor operations will be disabled until battery power recovers.
• Battery power will recover in about 15 minutes. At this time, the batte\
ry power indicators ( H
,M
,L
) will 
stop fl ashing. This indicates that the functions listed above are enabled again\
.
• If all of the battery power indicators ( H
,M
,L
) are fl ashing and the  C
 (charge) indicator also is fl ashing, 
it means the battery level is very low. Expose the watch to bright light\
 as soon as possible.
• Even if battery power is at Level 1 ( H
) or Level 2 ( M
), the Digital Compass Mode, Barometer/
Thermometer Mode, or Altimeter Mode sensor may be disabled if there is n\
ot enough voltage available 
to power it suffi ciently. This is indicated when all of the battery power indicators ( H
,M
,L
) are fl ashing.
• Frequent fl ashing of all of the battery power indicators ( H
,M
,L
) probably means that remaining battery 
power is low. Leave the watch in bright light to allow it to charge.
Charging Times
Exposure Level (Brightness) Daily
Operation *1 Level Change *2
Level 5 Level 4 Level 3 Level 2 Level 1
Outdoor sunlight (50,000 lux) 5 min. 2 hours 12 hours 4 hoursSunlight through a window (10,000 lux)24 min. 5 hours 59 hours 16 hours
Daylight through a window on a 
cloudy day (5,000 lux) 48 min. 9 hours 120 hours 32 hours
Indoor fl uorescent lighting (500 lux) 8 hours 95 hours – – – – – –
*1 Approximate amount of exposure time required each day to generate eno\
ugh power for normal daily  operation.
*2 Approximate amount of exposure time (in hours) required to take pow\
er from one level to the next.
• The above exposure times all are for reference only. Actual exposure ti\
mes depend on lighting  conditions.
• For details about the operating time and daily operating conditions, se\
e the “Power Supply” section of 
the Specifi cations.
Power SavingWhen 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 func\
tions are affected by Power 
Saving.
• There actually are two sleep state levels: “display sleep” and “\
function sleep”.Elapsed Time in Dark Display Operation
60 to 70 minutes (display sleep) Blank, with  PS
 fl ashing Display is off, but all functions are enabled.
6 or 7 days (function sleep) Blank, with  PS
 not fl ashing All functions are disabled, but timekeeping is 
maintained.
• The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If \
the watch is already in a sleep 
state when 6:00 AM arrives, however, it will remain in the sleep state.
• The watch will not enter a sleep state while it is in the Stopwatch Mod\
e or Countdown Timer Mode.
To recover from the sleep state
Move the watch to a well-lit area, press any button, or angle the watch \
towards your face for reading.
To turn Power Saving on and off 1. In the Timekeeping Mode, hold down  E
 until the currently selected 
city code starts to fl ash. This is the city code setting screen.
• Before the city code starts to fl ash, the message  SET Hold
will appear on the display. Keep  E
 depressed until  SET Hold
disappears and the city code starts to fl ash.
2. Use  D
 to display the Power Saving On/Off screen shown nearby.
3. Press  A
 to toggle Power Saving on ( On
) and off ( OFF
).
4. Press  E
 twice to exit the setting screen.
• The Power Saving on indicator ( PS) is on the display in all modes 
while Power Saving is turned on.
Battery power 
indicatorBattery power 
indicator
Power saving 
on indicatorPower saving 
on indicator
MO1007-EB 
						

							2
Operation Guide 3173 3246
Mode Reference Guide
Your watch has 10 “modes”. The mode you should select depends on w\
hat you want to do.To do this:Enter this mode:• View the current date in the Home City• Confi gure Home City and daylight saving time (DST) settings• Confi gure time and date settingsTimekeeping Mode
View the sunrise and sunset times for a specifi c date Sunrise/Sunset Mode
• Determine your current bearing or the direction from your current locat\
ion to a  destination as a direction indicator and angle value
• Determine your current location using the watch and a map Digital Compass Mode• View the barometric pressure and temperature at your current location• View a graph of barometric pressure readingsBarometer/Thermometer
Mode
To do this:
Enter this mode:• View the altitude at your current location• Determine the altitude differential between two locations (reference p\
oint and 
current location)
• Record an altitude reading with the measurement time and date Altimeter Mode
Recall records created in the Altimeter Mode Data Recall Mode
View the current time in one of 48 cities (31 time zones) around the g\
lobe World Time Mode
Use the stopwatch to measure elapsed time Stopwatch Mode
Use the countdown timer Countdown Timer Mode
Set an alarm time Alarm Mode
General Functions (All Modes)
The functions and operations described in this section can be used in al\
l of the modes.
Auto Return Features
• The watch returns to the Timekeeping Mode automatically if you do not p\
erform any button operation  for two or three minutes in the Sunrise/Sunset, Data Recall, Alarm, or D\
igital Compass Mode.
• If you leave a screen with fl ashing digits on the display for two or three minutes without performing\
 any operation, the watch exits the setting screen automatically.
Initial Screens
When you enter the World Time, Alarm, or Digital Compass Mode, the data \
you were viewing when you 
last exited the mode appears fi rst.
Scrolling
The A
 and  C
 buttons are used on the setting screen to scroll through data on the di\
splay. In most 
cases, holding down these buttons during a scroll operation scrolls thro\
ugh the data at high speed.
Timekeeping
Use the Timekeeping Mode to set and view the current time and date.• Pressing  E
 while in the Timekeeping Mode will cycle through the Timekeeping Mode d\
isplay formats 
as shown below.
Ye a rBarometric 
pressure graph
Day of the Week Screen Year Screen Barometric Pressure
Graph Screen
PM
indicator Day of 
weekMonth
Day
Seconds
Hour : Minutes
Confi  guring Home City Settings
There are two Home City settings: actually selecting the Home City and s\
electing either standard time or 
daylight saving time (DST).
To confi gure Home City settings
1. In the Timekeeping Mode, hold down  E
 until the currently selected 
city code starts to fl ash. This is the city code setting screen.
• Before the city code starts to fl ash, the message  SET Hold
will appear on the display. Keep  E
 depressed until  SET Hold
disappears and the city code starts to fl ash.
• The watch will exit the setting mode automatically if you do not  perform any operation for about two or three minutes.
• For details about city codes, see the “City Code Table”.
2. Press  A
 (East) and  C
 (West) to select the city code you want to use 
as your Home City.
• Keep pressing  A
 or  C
 until the city code you want to select as 
your Home City appears on the display.
3. Press  D
 to display the DST setting screen.
4.
Use A
 to toggle the DST settings between  OFF
 and  On
.• Note that you cannot switch between standard time and daylight 
saving time (DST) while UTC is selected as your Home City.
5. After all the settings are the way you want, press  E
 twice to return to the Timekeeping Mode.
• The  DST indicator appears to indicate that Daylight Saving Time is turned on.
Note
• After you specify a city code, the watch will use UTC* offsets in the World Time Mode to calculate  the current time for other time zones based on the current time in your Home City.
* Coordinated Universal Time, the world-wide scientifi c standard of timekeeping.  The reference point for UTC is Greenwich, England.
To change the Daylight Saving Time (summer time) setting 1. In the Timekeeping Mode, hold down  E
 until the currently selected 
city code starts to fl ash. This is the city code setting screen.
• Before the city code starts to fl ash, the message  SET Hold
will appear on the display. Keep  E
 depressed until  SET Hold
disappears and the city code starts to fl ash.
2. Press  D
 to display the DST setting screen.
3. Use  A
 to toggle the DST settings between  OFF
 and  On
.
4. After all the settings are the way you want, press  E
 twice to return to 
the Timekeeping Mode.
• The  DST indicator appears to indicate that Daylight Saving Time is 
turned on.
PM
indicator City
codeMonth
Day
Seconds
Hour : Minutes
DST indicator
PM
indicator City
codeMonth
Day
Seconds
Hour : Minutes
DST indicator
DST indicatorDST indicator
Selecting a Mode• The illustration below shows which buttons you need to press to navigat\
e between modes.• For about one second after you enter a mode by pressing  D
, a pointer will appear on the display 
pointing the applicable mode name on the watch's bezel.
• In any mode, press  L
 to illuminate the display.
• You can use buttons  A
,B
, and  C
 to enter a sensor mode directly from the Timekeeping Mode or 
from another sensor mode. To enter a sensor mode from the Sunrise/Sunset\
 Mode, Data Recall, World 
Time, Stopwatch, Countdown Timer, or Alarm Mode, fi rst enter the Timekeeping Mode and then press 
the applicable button.
World Time 
Mode Data Recall 
Mode Sunrise/Sunset
Mode
Stopwatch Mode Countdown
Timer Mode Alarm Mode Altimeter Mode
Barometer/
Thermometer Mode
Digital Compass Mode
Timekeeping ModeSensor ModesWorld Time 
Mode Data Recall 
Mode Sunrise/Sunset
Mode
Stopwatch Mode Countdown
Timer Mode Alarm Mode Altimeter Mode
Barometer/
Thermometer Mode
Digital Compass Mode
Timekeeping ModeSensor Modes 
						

							3
Operation Guide 3173 3246
Confi guring Current Time and Date Settings
You can use the procedure below to adjust the Timekeeping Mode time and \
date settings if they are off.
To change the current time and date settings
1. In the Timekeeping Mode, hold down  E
 until the currently selected 
city code starts to fl ash. This is the city code setting screen.
• Before the city code starts to fl ash, the message  SET Hold
will appear on the display. Keep  E
 depressed until  SET Hold
disappears and the city code starts to fl ash.
2. Use  A
 and  C
 to select the city code you want.
• Select your Home City code before changing any other setting.• For full information on city codes, see the “City Code Table”.
3. Press  D
 to move the fl ashing in the sequence shown below to select the other settings.
Thermometer/Barometer/
Altitude unit Power
SavingIllumination
Duration Button Operation 
Tone On/Off
Day Month
City Code
DST
12/24-Hour
Format
Seconds Hour Minutes Year
• The following steps explain how to confi gure timekeeping settings only.
4. When the timekeeping setting you want to change is fl ashing, use  A
 and/or  C
 to change it as 
described below.
Screen To do this: Do this:Change the city code Use  A
 (East) and  C
 (West).Toggle between Daylight Saving Time ( On
) and 
Standard Time ( OFF
). Press
A
.
Toggle between 12-hour ( 12H
) and 24-hour ( 24H
)
timekeeping. Press
A
.
50Reset the seconds to  00
PressA
.
Change the hour or minutes
UseA
 (+) and  C
 (–).
Change the year, month, or day
5. Press  E
 twice to exit the setting screen.
Note
• For information about selecting a Home City and confi guring the DST setting, see “Confi guring  Home City Settings”.
• While 12-hour format is selected for timekeeping, a  P (PM) indicator will appear for times from 
noon to 11:59 p.m. No indicator appears for times from midnight to 11:59 a.m. With 24-hour format, 
time is displayed from 0:0 0 to 23:59, without any  P (PM) indicator.
• The watch’s 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 after you have the 
watch’s rechargeable battery replaced or after power drops to Level 5.
Digital Compass
In the Digital Compass Mode, a built-in bearing sensor detects magnetic \
north at regular intervals and 
indicates one of 16 directions on the display.
To take a digital compass reading
1. Make sure the watch is in the Timekeeping Mode or any one of the sensor modes.
•The sensor modes are: Digital Compass Mode, Barometer/Thermometer Mode, and Altimeter Mode.
2. Place the watch on a fl at surface. If you are wearing the watch, make  sure that your wrist is horizontal (in relation to the horizon).
3. Point the 12 o'clock position of the watch in the direction you want \
to  measure.
4. Press  C
 to start digital compass measurement.
•COMP  will appear on the display to indicate that a digital compass 
operation is in progress.
•See “Digital Compass Readings” for information about what  appears on the display.
Note
•If a value appears to the right of the direction indicator, it means  that the bearing memory screen is displayed. If this happens, press 
E  to exit the bearing memory screen.
5. After you are fi nished using the digital compass, press  D
 to return to 
the Timekeeping Mode.
Digital Compass Readings• When you press  C
 to start digital compass measurement,  COMP
 will appear on the display initially to 
indicate that a digital compass operation is in progress.
• About two seconds after you start a digital compass measurement operati\
on, letters on the display will  indicate the direction that the 12 o’clock position of the watch is p\
ointing. Four pointers that indicate 
magnetic north, south, east, and west also will appear.
• After the fi  rst reading is obtained, the watch will continue to take digital compass\
 readings automatically 
each second for up to 20 seconds. After that, measurement will stop auto\
matically.
• The direction indicator and angle value will show  - - -
 to indicate that digital compass readings are 
complete.
• The auto light switch is disabled during the 20 seconds that digital co\
mpass readings are being taken. • The following table shows the meanings of each of the direction abbrevi\
ations that appear on the  display.
Direction Meaning Direction Meaning Direction Meaning Direction Meaning
N North NNENorth-
northeast NE
Northeast ENEEast-
northeast
E East ESEEast-
southeast SE
Southeast SSESouth-
southeast
S South SSWSouth-
southwest SW
Southwest WSWWest-
southwest
W West WNW West-
northwest NW
Northwest NNWNorth-
northwest
• The margin of error for the angle value and the direction indicator is \
±11 degrees while the watch is 
horizontal (in relation to the horizon). If the indicated direction is\
 northwest ( NW
) and 315 degrees, for 
example, the actual direction can be anywhere from 304 to 326 degrees.
PM
indicator City
codeMonth
Day
Seconds
Hour : MinutesPM
indicator City
codeMonth
Day
Seconds
Hour : Minutes
NW
0WNWWWSWSWSSWSSS
ESEESEEEN ENENNENNNW
90
180 270
12 o’clock 
position
Current
timeNorth
pointer
Direction
indicator
Angle value (in degrees)
NW 0WNWWWSWSWSSWSSS
ESEESEEEN ENENNENNNW
90
180 270
12 o’clock 
position
Current
timeNorth
pointer
Direction
indicator
Angle value (in degrees)
• Note that taking a measurement while the watch is not horizontal (in r\
elation to the horizon) can result in  large measurement error.
• You can calibrate the bearing sensor if you suspect the direction readi\
ng is incorrect.• Any ongoing direction measurement operation is paused temporarily while\
 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 t\
he operation 
that caused it to pause is fi nished.
• See “Digital Compass Precautions” for important information about\
 taking direction readings.
Calibrating the Bearing SensorYou should calibrate the bearing sensor whenever you feel that the direc\
tion readings being produced by 
the watch are off. There are three different calibration methods availab\
le: magnetic declination correction, 
bidirectional calibration, and northerly calibration.
• Magnetic Declination Correction
With magnetic declination correction, you input a magnetic declination a\
ngle (difference between 
magnetic north and true north), which allows the watch to indicate true\
 north. You can perform this 
procedure when the magnetic declination angle is indicated on the map yo\
u are using. Note that you can 
input the declination angle in whole degree units only, so you may need \
to round off the value specifi  ed 
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°.
• Bidirectional Calibration and Northerly Calibration
Bidirectional calibration and northerly calibration calibrate the accura\
cy of the bearing sensor in relation 
to magnetic north. Use bidirectional calibration when you want to take r\
eadings 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 “teach” the watch which wa\
y is north (which you have to determine 
with another compass or some other means).
Important!
The more correctly you perform bidirectional calibration, the better the\
 accuracy of the bearing sensor 
readouts. You should perform bidirectional calibration whenever you chan\
ge environments where you 
use the bearing sensor, and whenever you feel that the bearing sensor is\
 producing incorrect readings.
To perform magnetic declination correction
1.
In the Digital Compass Mode, hold down  E
 until the current magnetic 
declination settings start to fl ash on the display. This is the setting screen.
•Before the magnetic declination settings start to fl ash, the message 
SET Hold  will appear on the display. Keep  E
 depressed until 
SET Hold  disappears and the magnetic declination settings start to 
fl a s h .
2. Use  A
 (East) and  C
 (West) to change the settings.• The following explains magnetic declination angle direction 
settings.
OFF : No magnetic declination correction performed. The magnetic 
declination angle with this setting is 0°.
E :        When magnetic north is to the east (east declination)
W :       When magnetic north is to the west (west declination)
• You can select a value within the range of W 90° to E 90° with 
these settings.
• You can turn off ( OFF) magnetic declination correction by pressing 
A  and  C
 at the same time.
• The illustration, 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  E
 to 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 perf\
orm the procedure 
incorrectly, you will get wrong bearing sensor readings.
• Do not move the watch while calibration of either direction is in progr\
ess.• 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 fi eld, for example, 
calibrate in an open fi eld.
To perform bidirectional calibration 1. In the Digital Compass Mode, hold down  E
 until the current magnetic 
declination settings start to fl ash on the display. This is the setting 
screen.
• Before the magnetic declination settings start to fl ash, the  message  SET Hold  will appear on the display. Keep  E
 depressed 
until  SET Hold  disappears and the magnetic declination settings 
start to fl ash.
2. Press  D
 to display the bidirectional calibration screen.
• At this time, the north pointer fl ashes at the 12 o’clock position 
and the display will show  -1- to indicate that the watch is ready to 
calibrate the fi rst direction.
3. Place the watch on a level surface facing any direction you want, and\
  press C
 to calibrate the fi rst direction.
•- - -  is shown on the display while calibration is being performed. 
When calibration is successful, the display will show  OK and  -2-,
and the north pointer fl ashing at the 6 o’clock position. This means 
that the watch is ready for calibration of the second direction.
4. Rotate the watch 180 degrees.
5. Press  C
 again to calibrate the second direction.
•- - -  is shown on the display while calibration is being performed. When calibration is successful, 
the display will show  OK and then change to the Digital Compass Mode screen ( - - -).
To perform northerly calibration
Important!
If you want to perform both northerly and bidirectional calibration, per\
form bidirectional calibration fi rst, 
and then perform northerly calibration. This is necessary because bidire\
ctional calibration cancels any 
existing northerly calibration setting. 1. In the Digital Compass Mode, hold down  E
 until the current magnetic 
declination settings start to fl ash on the display. This is the setting 
screen.
• Before the magnetic declination settings start to fl ash, the  message  SET Hold  will appear on the display. Keep  E
 depressed 
until  SET Hold  disappears and the magnetic declination settings 
start to fl ash.
2. Press  D
 twice to display the northerly calibration screen.
• At this time,  -N- (north) appears on the display.
3. Place the watch on a level surface, and position it so that its 12 o’\
clock  position points north (as measured with another compass).
4. Press  C
 to start the calibration operation.
•- - -  is shown on the display while calibration is being performed. 
When calibration is successful, the display will show  OK and then 
change to the Digital Compass Mode ( - - -).
Magnetic declination 
angle direction value  (E, W, or OFF)
Magnetic declination 
angle valueMagnetic declination angle direction value  (E, W, or OFF)
Magnetic declination 
angle value
lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll 
						

							4
Operation Guide 3173 3246
Bearing MemoryBearing Memory lets you store a direction reading and display that 
reading as you take subsequent digital compass measurements. The 
Bearing Memory screen displays the direction angle for the stored 
direction, along with an indicator on the display that also indicates th\
e 
stored direction. 
When you take digital compass measurements while the Bearing Memory 
screen is on the display, the direction angle of the current digital com\
pass 
measurement (as read from the 12 o'clock position of the watch) and th\
e 
currently stored Bearing Memory direction information will both be 
displayed.
To store a direction angle reading in Bearing Memory
1. Press C
 to start a digital compass measurement operation.• If a bearing memory direction angle value is already displayed, 
it means that the bearing memory screen is displayed. If this 
happens, press  E
 to clear the value currently in Bearing Memory 
and exit the bearing memory screen.
2. During the 20 seconds that digital compass measurement is in  progress, press  E
 to store the current direction angle reading in 
Bearing Memory.
• The Bearing Memory direction angle fl ashes for about one second  as it is stored in Bearing Memory. After that, the Bearing Memory 
screen (which shows the bearing memory direction angle) will 
appear, and a 20 -second direction reading operation will start.
• While the Bearing Memory screen is displayed, you can press  C
 to start a new 20 -second 
direction reading operation, which displays the direction angle for the direction that the 12 o’clock 
position of the watch is pointed. The direction angle of the current readings will disappear from the 
display after the direction reading operation is complete.
• During the fi rst 20 seconds after you display the Bearing Memory screen or during the 20 -second  direction reading operation while the Bearing Memory screen is on the display, the direction 
stored in memory is indicated by a Bearing Memory pointer.
• Pressing  E
 while the Bearing Memory screen is displayed will clear the direction angle currently 
in Bearing Memory and start a 20 -second direction reading operation.
Using the Digital Compass While Mountain Climbing or HikingThis section provides three practical applications for using the watch’\
s built-in digital compass.• Setting a map and fi nding your current location  Having an idea of your current location is important when mountain climb\
ing or hiking. To do this, you 
need to “set the map”, which means to align the map so the directi\
ons 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.
• Finding the bearing to an objective• Determining the direction angle to an objective on a map and heading in\
 that direction
To set a map and fi  nd your current location
1. With the watch on your wrist, position it so the face is horizontal.
2. While in the Timekeeping Mode or in any of the sensor modes, press  C
 to take a compass reading.
• The reading will appear on the display after about two seconds.
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 confi gured to indicate magnetic north, align the map’s magnetic north with the watch indication. If the watch has 
been confi gured with a declination to correct to true north, align 
the map’s true north with the watch indication. For details, see 
“Calibrating the Bearing Sensor”.
• This will position the map in accordance with your current location.
4. Determine your location as you check the geographic contours around  you.
To fi  nd the bearing to an objective
1. Set the map so its northerly indication is aligned with north as indi\
cated by the watch, and determine your current location.
• See “To set a map and fi nd your current location” for 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. While in the Timekeeping Mode or in any of the sensor modes, press  C  to take a compass reading.
• The reading will appear on the display after about two seconds.
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.
• This will position the map in accordance with 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 th\
at direction 1. Set the map so its northerly indication is aligned with north as indi\
cated by the watch, and determine your current location.
• See “To set a map and fi nd your current location” for 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 o’clock position of the watch) are pointed in the direction o\
f 
objective, while keeping the northerly direction indicated on the map 
aligned with north as indicated by the watch.
• If you fi nd it dif fi cult to perform the above step while keeping everything aligned, fi rst move into the correct position (12 o’clock 
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.
12 o’clock 
position Bearing memory 
direction angle
North
pointer
Direction angle of 
current reading Bearing Memory Screen Bearing
memory
pointer12 o’clock 
position
Bearing memory 
direction angle
North
pointer
Direction angle of 
current reading Bearing Memory Screen Bearing
memory
pointer
N
NCurrent
location
North indicated 
on the map
North indicated by 
north pointerNNCurrent
location
North indicated 
on the map
North indicated by 
north pointer
NN
Objective
Current
location
12 o’clock 
position
N
N
Objective
Current
location
12 o’clock 
position
N
N
Objective
Current
location
12 o’clock 
position
N
N
Objective
Current
location
12 o’clock 
position
3. While in the Timekeeping Mode or in any of the sensor modes, press  C  to take a compass reading.
4. While direction angle readings are in progress, press  E
 to record the 
currently displayed direction in Bearing Memory.
• The direction angle value and pointer stored in Bearing Memory  will remain on the display for about 20 seconds.
• See “Bearing Memory” for more information.
5. Now you can advance while monitoring the Bearing Memory pointer to  ensure that it remains in the 12 o’clock position.
• To re-display the Bearing Memory direction angle value and Bearing Memory pointer, press  C
.
• Pressing  E
 while the Bearing Memory direction angle value and 
Bearing Memory pointer are on the display will clear the Bearing 
Memory data you saved in step 3 and save the current direction 
reading in Bearing Memory.
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.
Digital Compass Precautions
This watch features a built-in magnetic bearing sensor that detects terr\
estrial magnetism. This means that 
north indicated by this watch is magnetic north, which is somewhat diffe\
rent from true polar north. The 
magnetic north pole is located in northern Canada, while the magnetic so\
uth pole is in southern Australia. 
Note that the difference between magnetic north and true north as measur\
ed with all magnetic compasses 
tends to be greater as one gets closer to either of the magnetic poles. \
You should also remember that 
some maps indicate true north (instead of magnetic north), and so you \
should make allowances when 
using such maps with this watch.
Location
• Taking a direction reading when you are near a source of strong magneti\
sm can cause large errors in  readings. Because of this, you should avoid taking direction readings wh\
ile 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, househ\
old appliances (TVs, personal 
computers, washing machines, freezers, etc.).
• Accurate direction readings are impossible while in a train, boat, air \
plane, etc.• Accurate readings are also impossible indoors, especially inside ferroc\
oncrete structures. This is because the metal framework of such structures picks up magnetism from a\
ppliances, etc.
Storage
• The precision of the bearing sensor may deteriorate if the watch become\
s magnetized. Because of  this, you should 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\
 the procedure under “To  perform bidirectional calibration”.
Barometer/Thermometer
This watch uses a pressure sensor to measure air pressure (barometric p\
ressure) and a temperature 
sensor to measure temperature.
To enter and exit the Barometer/Thermometer Mode
1. While in the Timekeeping Mode or in any of the sensor modes, press B  to enter the Barometer/Thermometer Mode.
•BARO  will appear on the display, indicating that barometric 
pressure and temperature measurements are in progress. The 
measurement results will appear on the display after about fi ve 
seconds.
• After you press  B
, the watch will take readings every fi ve seconds 
for the fi rst fi ve minutes, and then every two minutes after that.
2. Press  D
 to return to the Timekeeping Mode.
• The watch will return to the Timekeeping Mode automatically if you 
do not perform any operation for about one hour after entering the 
Barometer/ Thermometer Mode.
To take barometric pressure and temperature readings
While in the Timekeeping Mode or in any of the sensor modes, press  B
.
• This starts barometric pressure and temperature measurements automatica\
lly.• You also can perform a barometric pressure and temperature measurement \
at any time by pressing  B
in the Barometer/Thermometer Mode.
• It can take up to four or fi ve seconds for the barometric pressure reading to appear after you enter\
 the  Barometer/Thermometer Mode.
Barometric Pressure
• Barometric pressure is displayed in units of 1 hPa (or 0.05 inHg).•The displayed barometric pressure value changes to  - - -
 if a measured 
barometric pressure falls outside the range of 260 hPa to 1,100 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.
Temperature• Temperature is displayed in units of 0.1°C (or 0.2°F).• The displayed temperature value changes to  - - -
 °C (or °F) if a 
measured temperature falls outside the range of –10.0°C to 60.0°\
C 
(14.0°F to 140.0°F). The temperature value will reappear as soon\
 as 
the measured temperature is within the allowable range.
Display Units
You can select either hectopascals (hPa) or inchesHg (inHg) as the d\
isplay unit for the measured 
barometric pressure, and Celsius (°C) or Fahrenheit (°F) as th\
e display unit for the measured temperature 
value. See “To specify temperature, barometric pressure, and altitude\
 units”.
Barometric Pressure GraphBarometric 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 30th minute of every even numbered hour). 
Measurement results are used to produce barometric pressure graph and 
barometric pressure differential pointer readings.
Reading the Barometric Pressure GraphThe barometric pressure graph shows readings of previous measurements fo\
r up to 24 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 1 hPa.
12 o’clock 
position Bearing
memory
pointer
North
pointer
Direction angle of 
current reading Bearing memory 
direction angle 
value12 o’clock 
positionBearing
memory
pointer
North
pointer
Direction angle of 
current reading Bearing memory 
direction angle 
value
Temperature
Barometric
pressure graph
Barometric
pressure Pressure differential 
pointerTemperature
Barometric
pressure graph
Barometric
pressure Pressure differential 
pointer
Temperature
Barometric
pressureTemperatureBarometric
pressure
Barometric
pressure graphBarometric
pressure graph
Barometric
pressure TimeBarometric
pressureTime 
						

							5
Operation Guide 3173 3246
The following shows how to interpret the data that appears on the barome\
tric pressure graph.
A rising graph generally means improving weather.
A falling graph generally means deteriorating weather.
Note
• If there are sudden changes in weather or temperature, the graph line o\
f past  measurements may run off the top or bottom of the display. The entire gr\
aph will 
become visible once barometric conditions stabilize.
• The following conditions cause the barometric pressure measurement to b\
e skipped, with the corresponding point on the barometric pressure graph b\
eing 
left blank.
– Barometric reading that is out of range (260 hPa to 1,100 hPa or 7\
.65 inHg to  32.45 inHg)
– Sensor malfunction
Barometric Pressure Differential PointerThis 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.
Reading Barometric Pressure Differential PointerPressure differential is indicated in the range of 
±10 hPa, in 1-hPa units.
• The nearby screen shot, for example, shows  what the pointer would indicate when the 
calculated pressure differential is 
approximately – 5 hPa (approximately – 0.15 
inHg).
• 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 
(1 hPa 
= 0.03 inHg).
Pressure Sensor and Temperature Sensor CalibrationThe pressure sensor and temperature sensor built into the watch are cali\
brated at the factory and normally 
require no further adjustment. If you notice serious errors in the press\
ure readings and temperature 
readings produced by the watch, you can calibrate the sensor to correct \
the errors.
Important!
• Incorrectly calibrating the barometric pressure sensor can result in in\
correct readings. Before performing the calibration procedure, compare the readings produced by t\
he watch with those of 
another reliable and accurate barometer.
• 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 reliabl\
e and accurate thermometer.– If adjustment is required, remove the watch from your wrist and wai\
t for 20 or 30 minutes to give the  temperature of the watch time to stabilize.
To calibrate the pressure sensor and the temperature sensor 1. While in the Timekeeping Mode or in any of the sensor modes, press  B
to enter the Barometer/Thermometer Mode.
2. Hold down  E
 until the current temperature value starts to fl ash on the 
display. This is the setting screen.
• Before the temperature value starts to fl ash, the message  SET 
Hold  will appear on the display. Keep  E
 depressed until  SET Hold
disappears.
3. Press  D
 to move the fl ashing between the temperature value and 
barometric pressure value, to select the one you want to calibrate.
4.
Use A
 (+) and  C
 (–) to set the calibration value in the units shown below.            Temperature                         0.1°C (0.2°F)
            Barometric Pressure             1 hPa (0.05 inHg)
• To return the currently fl ashing value to its initial factory default setting, 
press  A
 and  C
 at the same time.  OFF will appear at the fl ashing 
location for about one second, followed by the initial default value.
5. Press  E
 to return to the Barometer/Thermometer Mode screen.
Barometer and Thermometer Precautions• The pressure sensor built into this watch measures changes in air press\
ure, which you can then apply 
to your own weather predictions. It is not intended for use as a precisi\
on instrument in offi cial 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 me\
asurement, remove the 
watch from your wrist, place it in a well ventilated location out of dir\
ect sunlight, and wipe all moisture 
from the case. It takes approximately 20 to 30 minutes for the case of t\
he watch to reach the actual 
surrounding temperature.
Altimeter
The watch displays altitude values based on air pressure readings taken \
by a built-in pressure sensor.
How the Altimeter Measures AltitudeThe altimeter can measure altitude based on its own preset values (init\
ial default method) or using a 
reference altitude specifi ed by you.
When you measure altitude based on preset values
Data produced by the watch’s barometric pressure sensor is converted \
to approximate altitude based on 
ISA (International Standard Atmosphere) conversion values stored in wa\
tch memory.
When you measure altitude using a reference altitude specifi  ed by you
After you specify a reference altitude, the watch uses that value to con\
vert 
barometric pressure readings to altitude.
• When mountain climbing, you can specify a reference altitude value in  accordance with a marker along the way or altitude information from a 
map. After that, the altitude readings produced by the watch will be mor\
e 
accurate than they would without a reference altitude value.
Not visible on 
the display.Not visible on 
the display.
Barometric
pressure
differential
pointerBarometric
pressure
differential
pointer
Barometric pressure 
differential pointer inHg values
hPa values Current pressure 
greater than most recent measured  pressure
Current pressure 
less than most 
recent measured 
pressureBarometric pressure 
differential pointer inHg values
hPa values Current pressure 
greater than most recent measured  pressure
Current pressure 
less than most 
recent measured 
pressure
llllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllll
lllllllllllllllllllllllllllll
llllllllllllllllllllllllllllllllllllll
400A B400AB
To take an altimeter reading
1. Make sure the watch is in the Timekeeping Mode or any one of the sensor modes.
• The sensor modes are: Digital Compass Mode, Barometer/Thermometer Mode, and Altimeter Mode.
2. Press
A to start Altimeter measurement.•ALTI  will appear on the display, indicating that Altimeter 
measurement is in progress. The fi rst reading will appear on the 
display after about four or fi ve seconds.
• The current altitude value is displayed in units of 5 meters (20 feet).• After the fi rst reading is obtained, the watch continues to take  altimeter readings automatically every fi ve seconds for the fi rst 
three minutes, and then every two minutes after that (under initial 
default settings).
• If you leave the watch in the Altimeter Mode, it will update the displayed altitude value regularly and indicate reading-to-reading 
changes in graph form.
• You can use the procedure under “Selecting an Altitude Auto Measurement Method” to specify the altitude auto measurement 
method you want to use.
3. After you are fi nished using the Altimeter, press
D to return to the 
Timekeeping Mode and stop auto measurement.
• The watch will return to the Timekeeping Mode automatically if you  do not perform any operation for about 24 hours after entering the 
Altimeter Mode (under initial default settings).
Reading the Altitude GraphThe altitude graph shows Altimeter Mode auto measurement readings over t\
ime.• The vertical axis of the graph represents altitude, and each dot stands\
  for 10 meters (40 feet).
• The horizontal axis represents time. For the altitude readings taken during the fi rst three minutes after you start an altimeter measurement 
operation, each dot represents fi ve seconds. After that, each dot 
represents two minutes (under initial default settings).
• An out of range reading or a measurement error will cause the column of dots for that reading to be blank (skipped).
Note
• The measurement range for altitude is –700 to 10,000 meters (–2,\
300 to 32,800 feet).• The displayed altitude value changes to  - - -
 if an altitude reading falls outside the measurement range. 
An altitude value will reappear as soon as the altitude reading is withi\
n the allowable range.
•Normally, displayed altitude values are based on the watch’s preset c\
onversion values. You also can  specify a reference altitude value, if you want. See “Specifying a Re\
ference Altitude Value”.
• You can change the unit for displayed altitude values to either meters \
(m) or feet (ft).
See “To specify temperature, barometric pressure, and altitude units”\
.
Selecting an Altitude Auto Measurement MethodYou can select either of the following two altitude auto measurement met\
hods.
        0’05 : Readings at fi ve-second intervals for one hour
        2’00 : Readings at fi  ve-second intervals for the fi  rst three minutes followed by two-minute intervals for 
approximately 24 hours
Note
If you do not perform any button operation while in the Altimeter Mode, \
the watch will return to the 
Timekeeping Mode automatically after 24 hours (altitude auto measuremen\
t method:  2’00
) or after one 
hour (altitude auto measurement method:  0’05
).
To select the altitude auto measurement method 1. In the Altimeter Mode, hold down  E
 until the current reference altitude 
value starts to fl ash. This is the setting screen.
• Before the reference altitude starts to fl ash, the message  SET 
Hold  will appear on the display. Keep  E
 depressed until  SET 
Hold  disappears.
2. Press  D
 to display the current altitude auto measurement method 
setting.
• This will cause either  0’05 or 2’00  to fl ash on the display.
3. Press  A
 to toggle the altitude auto measurement method setting 
between 0’05
 and  2’00
.
4. Press  E
 to exit the setting screen.
Using the Altitude Differential ValueThe Altimeter Mode screen includes an altitude differential value that 
shows the change in altitude from a reference point you specify. The 
altitude differential value is updated each time the watch takes an alti\
tude 
reading.
• The range of the altitude differential value is –3,000 meters (–\
9,980 
feet) to 3,000 meters (9,980 feet).
•- - -  is displayed in place of the altitude differential value whenever the 
measured value is outside the allowable range.
• See “Using the Altitude Differential Value While Mountain Climbing o\
r  Hiking” for some real-life examples of how to use this feature.
To specify the altitude differential start point In the Altimeter Mode, press E
.
• The watch will take an altitude reading and register the result as the \
altitude differential value start point. The altitude differential value\
 will 
be reset to zero at this time.
Altitude
differential
Altitude
graph
Current
altitude Current timeAltitude
differential
Altitude
graph
Current
altitude Current time
Altitude
Latest
reading
TimeAltitude
Latest
reading
Time
lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
Altitude
differentialAltitude
differential
Altitude differentialAltitude differential 
						

							6
Operation Guide 3173 3246
Using the Altitude Differential Value While Mountain Climbing or HikingAfter you specify the altitude differential start point while mountain c\
limbing or hiking, you easily can 
measure the change in the altitude between that point and other points a\
long the way.
To use the altitude differential value1. In the Altimeter Mode, check to make sure that an altitude reading is\
 on the display.
• If an altitude reading is not displayed, press  A
 to take one. See “To 
take an altimeter reading” for details.
2. Use the contour lines on your map to determine the difference in  altitude between your current location and your destination.
3. In the Altimeter Mode, press  E
 to specify your current location as the 
altitude differential start point.
• The watch will take an altitude reading and register the result as  the altitude differential value start point. The altitude differential 
value will be reset to zero at this time.
4. While comparing the altitude difference you determined on the map  and the watch’s altitude differential value, advance towards your 
destination.
• If the map shows that the difference in altitude between your location and your destination is +80 meters for example, you know 
you will be nearing your destination when the displayed altitude 
differential value shows +80 meters.
Specifying a Reference Altitude ValueThe altitude readings 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 val\
ue whenever one is available 
during your climb. After you specify a reference altitude value, the wat\
ch adjusts its air-pressure-to-altitude 
conversion calculation accordingly.
To specify a reference altitude value
1. In the Altimeter Mode, hold down  E
 until the current reference altitude 
value starts to fl ash. This is the setting screen.
• Before the reference altitude value starts to fl ash, the message  SET Hold  will appear on the display. Keep  E
 depressed until 
SET Hold  disappears.
2. Press  A
 (+) or  C
 (–) to change the current reference altitude value 
by 5 meters (or 20 feet).
• Specify a reference altitude value based on accurate altitude  information about your current location from a map, etc.
• You can set the reference altitude value within the range of –10,0 0 0  to 10,000 meters (–32,800 to 32,800 feet).
• Pressing  A
 and  C
 at the same time returns to  OFF (no reference 
altitude value), so the watch performs air pressure to altitude 
conversions based on preset data only.
3. Press  E
 to exit the setting screen.
Types of Altitude DataThe watch can maintain two types of altitude data in its memory: manual \
measurement records, and auto 
save values (minimum, maximum, vertical ascent, vertical descent).
• Use the Data Recall Mode to view data stored in memory. See “Viewing\
 Altitude Records” for details.
Manual Measurement RecordsAny time you perform the procedure below in the Altimeter Mode, the watc\
h will create and store a record 
with the currently displayed altitude reading, along with the date and t\
ime the reading was taken. There is 
enough memory to store up to 25 manual measurement records, which are nu\
mbered from  REC01
through REC25
.
To save a manual measurement 1. In the Altimeter Mode, check to make sure that an altitude reading is\
 on the display.
• If an altitude reading is not displayed, press  A
 to take one. See “To 
take an altimeter reading” for details.
2. Hold down  A
 until  REC Hold
 appears on the display and then 
disappears. Release  A
 after  Hold
 disappears.
• This will save the currently displayed altitude reading in a manual 
measurement record, along with the measurement time and date.
• The watch will return to the Altimeter Mode screen automatically after the save operation is complete.
• There is enough memory to store up to 25 manual measurement records. If there are already 25 manual measurement records in 
memory, the above operation will cause the oldest record to be 
deleted automatically to make room for the new one.
Auto Save ValuesTwo sets of auto save values (Set 1 and Set 2) are maintained in watch\
 memory.Set 1 Set 2
Maximum Altitude ( MAX-1
)
Minimum Altitude ( MIN-1
)
Vertical Ascent ( ASC-1
)
Vertical Descent ( DSC-1
) Maximum Altitude (
MAX-2
)
Minimum Altitude ( MIN-2
)
Vertical Ascent ( ASC-2
)
Vertical Descent ( DSC-2
)
•These values are checked and updated automatically by the watch as altit\
ude auto measurements are 
taken.
How Maximum and Minimum Values Are Updated
While the watch is in the Altimeter Mode, altitude readings are taken au\
tomatically at the interval specifi ed 
by the altitude auto measurement method. With each reading, the watch co\
mpares the current reading 
against the  MAX
 (MAX-1
 and MAX-2
) and MIN
 (MIN-1
 and MIN-2
) values. It will replace the  MAX
 value if 
the current reading is greater than  MAX
, or the  MIN
 value if the current reading is less than  MIN
.
How Vertical Ascent/Descent Values Are Updated
Session start point
20 m 0 m
120 m 320 m
620 m
Session end point
The total Vertical Ascent and Vertical Descent values produced by an Alt\
imeter Mode measurement 
session during the example climb illustrated above are calculated as fol\
lows.
  Vertical Ascent:
q (300 m) + e (620 m) = 920 m
  Vertical Descent: w (320 m) + r (500 m) = 820 m
Current
location
Destination
altitudeCurrent
location
Destination
altitude
Altitude differential
AltitudeAltitude differential
Altitude
lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
• Entering the Altimeter Mode starts a new altitude auto measurement sess\
ion, but it does not reset the  current ASC
 (ASC-1
 and ASC-2
) and DSC
 (DSC-1
 and DSC-2
) values or change them in any way. 
This means that the starting  ASC
 and  DSC
 values for a new Altimeter Mode auto measurement session 
are the values that currently are in memory. Each time you complete an A\
ltimeter Mode auto 
measurement session by returning to the Timekeeping Mode, the vertical a\
scent value of the current 
session (920 meters in the above example) is added to the session’s\
 starting  ASC
 value. Also, the 
vertical descent value of the current auto measurement session ( –820 meters in the above example) is 
added to the session’s starting  DSC
 value.
• Note that any change in elevation when ascending that is less than 15 m\
eters (49 feet) is not added to 
the vertical ascent value for the current Altimeter Mode auto measuremen\
t session. Also, any change in 
elevation when descending that is less than  –15 meters (
–49 feet) is not added to the vertical descent 
value for the current Altimeter Mode auto measurement session.
Note
• The maximum altitude, minimum altitude, vertical ascent, and vertical d\
escent values are retained in  memory when you exit the Altimeter Mode. To clear values, perform the pr\
ocedure under “To clear the 
contents of a specifi c memory area”.
Using Auto Save Values
The watch maintains two independent sets of auto save values as shown be\
low.
Set 1 Set 2
Maximum Altitude ( MAX-1
)
Minimum Altitude ( MIN-1
)
Vertical Ascent ( ASC-1
)
Vertical Descent ( DSC-1
) Maximum Altitude (
MAX-2
)
Minimum Altitude ( MIN-2
)
Vertical Ascent ( ASC-2
)
Vertical Descent ( DSC-2
)
The values in Set 1 and Set 2 can be cleared independently of each other\
. This means you can use them 
to keep track of daily and cumulative data as described in the example b\
elow.
Example:
 Keeping track of data on a three-day climb
Day 1
Clear both Set 1 and Set 2, and start your Day 1 climb.
At the end of the day, both sets of auto save values contain the same da\
ta ( MAX-1
 = MAX-2
,MIN-1
 = 
MIN-2 , etc.).
Day 2
Clear only Set 1, and start your Day 2 climb.  At the end of the day, the values in Set 1 (MAX-1
,MIN-1
,
ASC-1 ,DSC-1
) will show the results of Day 2 only. In Set 2,  MAX-2
 and MIN-2
 will show the maximum 
and minimum altitudes reached over the two-day span.  ASC-2
 will show the total vertical ascent for the 
two days (Day 1 + Day 2) and  DSC-2
 will show the total vertical descent for the two days.
Day 3
Clear only Set 1, and start your Day 3 climb. At the end of the day, the\
 values in Set 1 will show the 
results of Day 3 only. In Set 2,  MAX-2
 and MIN-2
will show the maximum and minimum altitudes 
reached over the three-day span.  ASC-2
 will show the total vertical ascent for the three days (Day 1 + 
Day 2 + Day 3) and  DSC-2
 will show the total vertical descent for the three days.
• For details about clearing altitude data, see “To clear the contents\
 of a specifi c memory area”.
How does the altimeter work?Generally, air pressure and temperature decrease as altitude increases. \
This watch bases its altitude 
measurements on International Standard Atmosphere (ISA) values stipula\
ted by the International Civil 
Aviation Organization (ICAO). These values defi ne relationships between altitude, air pressure, and 
temperature.
0 m500 m
1000 m
1500 m
2000 m
2500 m
3000 m
3500 m
4000 m
899 hPa
795 hPa
701 hPa
616 hPa
8.5°C
2°C
–4.5°C
–11°C
15°C
1013 hPa About 6.5°C 
per 1000 m
About 8 hPa per 100 m
About 9 hPa per 100 m
About 10 hPa per 100 m
About 11 hPa per 100 m
About 12 hPa per 100 m
Altitude Air Pressure Temperature
0 ft.
2000 ft.
4000 ft.
6000 ft.
8000 ft.
10000 ft.
12000 ft.
14000 ft.
25.84 inHg
22.23 inHg
19.03 inHg
44.7°F
30.5°F
16.2°F
59.0°F
29.92 inHg About 3.6°F 
per 1000 ft.
About 0.15 inHg per 200 ft.
About 0.17 inHg per 200 ft.
About 0.192 inHg per 200 ft.
About 0.21 inHg per 200 ft.Source:   International Civil Aviation Organization• Note that the following conditions will prevent you from obtaining accu\
rate readings:
When air pressure changes because of changes in the weather
Extreme temperature changes
When the watch itself is subjected to strong impact
There are two standard methods of expressing altitude: Absolute altitude\
 and relative altitude. Absolute 
altitude expresses an absolute height above sea level. Relative altitude\
 expresses the difference between 
the height of two different places.
Height of building 130 m 
(relative altitude) Rooftop at an altitude of 
230 m above sea level 
(absolute altitude)
Sea Level
Altimeter Precautions• This watch estimates altitude based on air pressure. This means that al\
titude readings for the same location may vary if air pressure changes.
• The semiconductor pressure sensor used by the watch for altitude measur\
ements is also affected by temperature. When taking altitude measurements, do not subject the watch\
 to temperature changes.
• 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 deman\
d professional or industrial level precision.
• Remember that the air inside of a commercial aircraft is pressurized. B\
ecause of this, the readings produced by this watch will not match the altitude readings announced or\
 indicated the fl ight crew. 
						

							7
Operation Guide 3173 3246
Specifying Temperature, Barometric Pressure, and Altitude Units
Use the procedure below to specify the temperature, barometric pressure,\
 and altitude units to be used in 
the Barometer/Thermometer Mode and the Altimeter Mode.Important!
WhenTYO
 (Tokyo) is selected as the Home City, the altitude unit is set 
automatically to meters ( m
), the barometric pressure unit to hectopascals 
( hPa
), and the temperature unit to Celsius ( °C
). These settings cannot 
be changed.
To specify temperature, barometric pressure, and altitude units
1. In the Timekeeping Mode, hold down  E
 until the currently selected 
city code starts to fl ash. This is the city code setting screen.
• Before the city code starts to fl ash, the message  SET Hold
will appear on the display. Keep  E
 depressed until  SET Hold
disappears and the city code starts to fl ash.
2. Keep pressing  D
 until  UNIT
 appears in the upper left corner of the 
screen.
• See step 3 under “To change the current time and date settings”  for information about how to scroll through setting screens.
3. Perform the operations below to specify the units you want.
To specify this unit: Press this key: To toggle between these settings:
Altitude A
m (meters) and  ft
 (feet)
Barometric Pressure B
hPa (hectopascals) and  inHg
 (inches of mercury)
Temperature C
°C (Celsius) and  °F
 (Fahrenheit)
4. After the settings are the way you want, press  E
 twice to exit the setting screen.
Precautions Concerning Simultaneous Measurement of Altitude and Temperat\
ure
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 r\
esults. 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 contri\
butes 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 wr\
ist and allow it to hang freely from your bag or in another location where it is not exposed to direct s\
unlight. Note that removing the 
watch from your wrist can affect pressure sensor readings momentarily.
Viewing Altitude Records
Use the Data Recall Mode to view manually saved altitude readings and au\
tomatically saved high altitude, 
low altitude, total ascent, and total descent values. Altitude data reco\
rds are created and saved in the 
Altimeter Mode.
To view altitude records
1. Use D
 to select the Data Recall Mode ( REC
) as shown in  “Selecting 
a Mode” .
• About one second after  REC appears on the display, the display 
will change to show the fi rst record of the memory area you were 
viewing when you last exited the Data Recall Mode.
2. Use  B
 to select the memory area you want.
REC 01(Manually Saved 
Record Area)(Auto Save 
Value Area 1)MAX-1(Auto Save 
Value Area 2)MAX-2
3. Use  A
 and  C
 to scroll through the screens for an area and display the one you want.\
REC
01REC02 REC
25
Manually saved records
MAXMIN ASC DSC
Auto saved values
• While a manually saved record ( REC 01 through  REC 25) is displayed, the bottom of the screen 
will alternate between the date (month, day) and time (hour, minute) the record was created.
• While  MAX or MIN  auto saved values are displayed, the bottom of the screen will alternate 
between the date (month, day) and time (hour, minute) the value was recorded.
• While  ASC or DSC  auto saved values are displayed, the bottom of the screen will alternate 
between the date (month, day) and year that the  ASC or DSC  record was fi rst created.
• For detailed information about auto saved values, see “Auto Save Values”.
lllllllllllllllllllllllllllll
llllllllllllllllllllllllll
llllllllllllllllllllllllllllll
llllllllllllllllllllllllll
Record name
Altitude
Alternates between 
measurement time 
(Hour : Minutes) and 
measurement date 
(Month Day)Record name
Altitude
Alternates between 
measurement time 
(Hour : Minutes) and 
measurement date 
(Month Day)
AltitudeAltitude
AltitudeAltitude
4. After you are fi nished viewing data, use  D
 to exit the Data Recall Mode.•----  will be displayed if data has been deleted or if there is no corresponding data due to error, etc. 
In such cases, total ascent ( ASC) and total descent ( DSC) values will show zero.
• When the total ascent ( ASC) or total descent ( DSC) exceeds 99,995 meters (or 327,980 feet), the 
applicable value will restart from zero.
• If the total ascent ( ASC) or total descent ( DSC) value becomes 
fi ve digits, the leftmost (ten thousand) digit will appear in the upper 
right of the display. The nearby illustration shows the display when 
the  ASC-1  value is 99995 meters.
To clear the contents of a specifi  c memory area
1. Use  D
 to enter the Data Recall Mode.
2. Use  B
 to select the memory area you want to clear.
• Note that the contents of the memory area you select will be 
deleted as soon as you perform step 3 below. The clear operation 
cannot be undone, so double check to make sure you really want 
to delete the contents of the memory area you select here.
3. Hold down  E
 until  CLR Hold
 appears on the display and then 
disappears. Release  E
 after  CLR
 disappears.
• This will clear the memory area you selected in step 2 and then 
return to the data display screen, which now shows  ----. This 
indicates there is nothing stored in the currently displayed memory 
area.
Looking up Sunrise and Sunset Times
You can use the Sunrise/Sunset Mode to look up the sunrise and sunset ti\
mes for a particular date (year, 
month, day) and location.
To enter the Sunrise/Sunset Mode
While in the Timekeeping Mode, press  D
 to enter the Sunrise/Sunset 
Mode.
• This will display the sunrise and sunset times for the current date  based the currently specifi ed city code, latitude, and longitude.
• The three Daylight Pointers described below are on the display in the Sunrise/Sunset Mode.
Pointer 1: Sunset time in 24-hour format
Pointer 2: Sunrise time in 24-hour format
Pointer 3: This fl ashing pointer appears only when Pointer 1 and 
Pointer 2 are indicating the sunrise and sunset times for the current 
Timekeeping Mode date. It indicates the current Timekeeping Mode 
time in 24-hour format.
• Before trying to use the Sunrise/Sunset Mode, you need to confi gure settings for the city code, longitude, and latitude for the location who\
se 
sunrise and sunset times you want to view.
• The factory default confi guration of the location is: City Code:  TYO
(Tokyo); Latitude: North 36 degrees; Longitude: East 140 degrees.
• You can fi nd latitude and longitude for various cities around the globe  in the “Site Data List”.
To view the sunrise/sunset time for a particular date 1. Enter the Sunrise/Sunset Mode.
• This will display the sunrise and sunset times for the current date at the location specifi ed by the city code, latitude, and 
longitude.
2. While the sunrise/sunset time are on the display, use  A
 (+) and  C
 (–) 
to scroll through the dates.
• The sunrise and sunset times for the selected date will be  indicated by values and pointers.
• You can select any date between January 1, 20 0 0 and December  31, 20 99.
Note
• Sunrise/sunset time is displayed in 5-minute units.•If you think that the sunrise and/or sunset times are not correct for  some reason, check the watch’s city code, longitude and latitude 
settings.
• The sunrise and sunset times displayed by this watch are times at  sea level. Sunrise and sunset times are different at altitudes other 
than sea level.
To look up the sunrise and sunset times for a specifi  c city code
Important!
• You do not need to perform this procedure to look up the sunrise and sunset times in your currently  selected Home City.
• If you select a different city code to look up the sunrise and sunset times there, return to the city code of your Home City (your current location) when you are fi nished. Otherwise, the time shown 
in the Timekeeping Mode will not be correct.
• For information about the Home City setting, see “Confi guring Home City Settings”.
1. In the Timekeeping Mode, hold down  E
 until the currently selected city code starts to fl ash. This is the 
city code setting screen.
• Before the city code starts to fl ash, the message  SET Hold will appear on the display. Keep  E
depressed until  SET Hold disappears and the city code starts to fl ash.
2. Use  A
 (East) and  C
 (West) to select the city code whose sunrise and sunset times you wan\
t to view.
• For details about city codes, see the “City Code Table”.
3. Press  E
 twice to exit the setting screen.
Ten thousand digitTen thousand digit
Current
date Pointer 3
Pointer 2
Sunrise
time
Sunset
time
Pointer 1Current
date Pointer 3
Pointer 2
Sunrise
time
Sunset
time
Pointer 1
Date
Sunset time Sunrise timeDate
Sunset time Sunrise time 
						

							8
Operation Guide 3173 3246
To confi gure longitude and latitude settings
1. In the Timekeeping Mode, hold down  E
 until the currently selected 
city code starts to fl ash. This is the city code setting screen.
• Before the city code starts to fl ash, the message  SET Hold
will appear on the display. Keep  E
 depressed until  SET Hold
disappears and the city code starts to fl ash.
2. Press  E
 to display the longitude/latitude setting screen, with the 
latitude setting fl ashing.
3. Use  D
 to move the fl ashing between the latitude and the longitude 
setting.
4. Use  A
 (+) and  C
 (–) to change the fl ashing setting.
•You can configure the longitude and latitude setting within 
following ranges.
  Latitude Range: 65°S (South 65 degrees) to 0°N – 65°N (No\
rth 65  degrees)
  Longitude Range: 179°W (West 179 degrees) to 0°E – 180°E (\
East  180 degrees)
• Latitude and longitude values are rounded off to the nearest degree.
• You can fi nd latitude and longitude for various cities around the globe in the “Site Data List”.
5. Press  E
 to return to the Timekeeping Mode.
Checking the Current Time in a Different Time Zone
You can use the World Time Mode to view the current time in one of 31 ti\
me zones (48 cities) around the 
globe. The city that is currently selected in the World Time Mode is cal\
led the “World Time City”.
To enter the World Time Mode
UseD
 to select the World Time Mode ( WT
) as shown in “Selecting a 
Mode”.
•About one second after  WT
 appears on the display, the display will 
change to show the city code of the currently selected World Time City.
• The two pointers described below are on the display in the World Time  Mode.
Pointer 1 (not fl ashing): Indicates the current time in the currently 
selected World Time City in 24-hour format.
Pointer 2 (fl ashing): Indicates the current Timekeeping Mode time in 
24-hour format.
To view the time in another time zone
In the World Time Mode, use  A
 (East) and  C
 (West) to scroll through city codes.
To specify standard time or daylight saving time (DST) for a city 1. In the World Time Mode, use A
 (East) and  C
 (West) to display the 
city code (time zone) whose Standard Time/Daylight Saving Time 
setting you want to change.
2. Hold down  E
 until  DST Hold
 appears on the display and then 
disappears. Release  E
 after  DST Hold
 disappears.
• This toggles the city code you selected in step 1 between Daylight 
Saving Time ( DST indicator displayed) and standard time ( DST
indicator not displayed).
• Using the World Time Mode to change the DST setting of the  city code that is selected as your Home City also will change the 
Timekeeping Mode time DST setting.
• Note that you cannot switch between standard time/daylight saving time (DST) while  UTC is selected as the World Time City.
• Note that the standard time/daylight saving time (DST) setting 
affects only the currently selected time zone. Other time zones are 
not affected.
Using the Stopwatch
The stopwatch measures elapsed time, split times, and two fi nishes.
To enter the Stopwatch Mode
UseD
 to select the Stopwatch Mode ( STW
) as shown in “Selecting a 
Mode”.
• About one second after  STW
 appears on the display, the display will 
change to show the stopwatch hours.
To perform an elapsed time operation
A
AAACStart Stop (Restart) (Stop) Reset
To pause at a split time
A
CCACStart Split (SPL
 displayed) Split release Stop Reset
To measure two fi
 nishes
A
CACCStart Split First runner fi nishes.
Display time of fi rst 
runnerStop
Second runner 
fi nishes.
Split release
Display time of 
second runnerReset
Note• The Stopwatch Mode can indicate elapsed time up to 23 hours, 59 minutes\
, 59.99 seconds.• Once started, stopwatch timing continues until you press 
C
 to stop it, even if you exit the Stopwatch 
Mode to another mode and even if timing reaches the stopwatch limit defi\
 ned above.
• Exiting the Stopwatch Mode while a split time is frozen on the display \
clears the split time and returns  to elapsed time measurement.
Latitude
Longitude
Press
D.
Latitude
Longitude
Press
D.
Pointer 1 Currently selected 
World Time City
Current time in the 
currently selected
World Time City Pointer 2
Current
Timekeeping
Mode timePointer 1 Currently selected 
World Time City
Current time in the 
currently selected
World Time City Pointer 2
Current
Timekeeping
Mode time
DST indicatorDST indicator
Hours
1/100 second
Seconds
Minutes
Current
timeHours1/100 second
Seconds
Minutes
Current
time
Using the Countdown Timer
The countdown timer can be confi gured to start at a preset time, and sound an alarm when the end of the \
countdown is reached.
To enter the Countdown Timer Mode
UseD
 to select the Countdown Timer Mode ( TMR
) as shown in “Selecting a 
Mode”.
• About one second after  TMR
 appears on the display, the display will 
change to show the countdown time hours.
To specify the countdown start time
1. Enter the Countdown Timer Mode.
• If a countdown is in progress (indicated by the seconds counting  down), press  A
 to stop it and then press  C
 to reset to the current 
countdown start time.
• If a countdown is paused, press  C
 to reset to the current 
countdown start time.
2. Hold down  E
 until the hour setting of the current countdown start time 
starts to fl ash. This is the setting screen.
• Before the hour setting starts to fl ash, the message  SET Hold
will appear on the display. Keep  E
 depressed until  SET Hold
disappears and the hour setting starts to fl ash.
3. Press  D
 to move the fl ashing between the hour and minute settings.
4. Use  A
 (+) and  C
 (–) to change the fl ashing item.
• To set the starting value of the countdown time to 24 hours, set  0H 00’00.
5. Press  E
 to exit the setting screen.
To perform a countdown timer operation
A
AAACStart Stop (Restart) (Stop) Reset• Before starting a countdown timer operation, check to make sure that a \
countdown operation is not in  progress (indicated by the seconds counting down). If it is, press  A
 to stop it and then  C
 to reset to 
the countdown start time.
• An alarm sounds for fi ve seconds when the end of the countdown is reached. This alarm will sou\
nd in  all modes. The countdown time is reset to its starting value automatical\
ly when the alarm sounds.
To stop the alarm
Press any button.
Using the Alarm
You can set fi ve independent daily alarms. When an alarm is turned on, 
an alarm will sound for about 10 seconds each day when the time in the 
Timekeeping Mode reaches the preset alarm time. This is true even if the\
 
watch is not in the Timekeeping Mode.
You can also turn on an Hourly Time Signal, which will cause the watch 
to beep twice every hour on the hour.
To enter the Alarm Mode
Use
Dto select the Alarm Mode ( ALM
) as shown in “Selecting a Mode”.• About one second after  ALM
 appears on the display, the display will 
change to show an alarm number ( AL1
 through  AL5
) or the  SIG
indicator. The alarm number 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 appears fi rst.
To set an alarm time 1. In the Alarm Mode, use A
 and  C
 to scroll through the alarm screens 
until the one whose time you want to set is displayed.
AL1AL2 AL3
SIG AL5
AL4
2. Hold down  E
 until the alarm time starts to fl ash. This is the setting 
screen.
• Before the alarm time starts to fl ash, the message  SET Hold
will appear on the display. Keep  E
 depressed until  SET Hold
disappears and the alarm time starts to fl ash.
3. Press  D
 to move the fl ashing between the hour and minute settings.
4. While a setting is fl ashing, 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  E
 to exit the setting screen.
To test the alarm
In the Alarm Mode, hold down  A
 to sound the alarm.
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, use  A
 and  C
 to 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 and off.
•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.
To stop the alarm
Press any button.
Current time Countdown time 
(Hour, minutes, 
seconds)Current timeCountdown time 
(Hour, minutes, 
seconds)
Alarm
number or 
SIG
Alarm time 
(Hour : Minutes)
Current timeAlarm
number or 
SIG Alarm time 
(Hour : Minutes)
Current time
Alarm ON/OFF 
indicatorAlarm ON/OFF 
indicator
Module 3173
Module 3246
Hourly time signal 
on indicator
Alarm on indicatorModule 3173
Module 3246
Hourly time signal 
on indicator
Alarm on indicator 
						

							9
Operation Guide 3173 3246
Illumination
The display of the watch is illuminated for easy reading in the dark.
The watch’s auto light switch turns on illumination automatically whe\
n 
you angle the watch towards your face.
• The auto light switch must be turned on for it to operate.
To turn on illumination manually
Press L
 in any mode to illuminate the display.
• You can use the procedure below to select either one second or three 
seconds as the illumination duration. When you press  L
, the display 
will remain illuminated for about one second or three seconds, 
depending on the current illumination duration setting.
• The above operation turns on illumination regardless of the current  auto light switch setting.
• Illumination is disabled while confi guring sensor measurement mode settings, and during bearing sensor calibration.
To change the illumination duration
1. In the Timekeeping Mode, hold down  E
 until the currently selected city code starts to fl ash. This is the 
city code setting screen.
• Before the city code starts to fl ash, the message  SET Hold will appear on the display. Keep  E
depressed until  SET Hold disappears and the city code starts to fl ash.
2. Keep pressing  D
 until  LT1
 or LT3
 is displayed in the upper left corner of the display.
• See step 3 under “To change the current time and date settings” for information about how to 
scroll through setting screens.
3. Press  A
 to toggle the illumination duration between three seconds ( LT3
 displayed) and one second 
( LT1
 displayed).
4. After the settings are the way you want, press  E
 twice to exit the setting screen.
About the Auto Light SwitchTurning on the auto light switch causes illumination to turn on, 
whenever you position your wrist as described below in any mode.
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.
Warning!
• Always make sure you are in a safe place whenever you are 
reading the display of the watch using the auto light switch. Be especia\
lly 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 other\
s 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. Sudde\
n and unintended 
operation of the auto light switch can create a distraction, which can r\
esult in a traffi  c accident 
and serious personal injury.
Note
• This watch features a “Full Auto EL Light”, so the auto light swi\
tch operates only when available light is  below a certain level. It does not illuminate the display under bright l\
ight.
• The auto light switch is always disabled, regardless of its on/off sett\
ing, when any one of the following conditions exists.While an alarm is sounding
During sensor measurement
While a bearing sensor calibration operation is being performed in the D\
igital Compass Mode
While a sunrise or sunset time is being calculated
To turn the auto light switch on and off
In the Timekeeping Mode, hold down  L
 for 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.
Illumination Precautions
• Frequent display illumination can run down the battery quickly and requ\
ire charging. The following guidelines give an idea of the charging time required to r\
ecover from a single illumination 
operation.Approximately fi ve minutes exposure to bright sunlight coming in through a window
Approximately 50 minutes exposure to indoor fl uorescent lighting
• The electro-luminescent panel that provides illumination loses power af\
ter very long use.• Illumination may be hard to see when viewed under direct sunlight.• Illumination turns off automatically whenever an alarm sounds.• Frequent use of illumination runs down the battery.
Auto light switch precautions
• 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 t\
he display. To avoid running down 
the battery, turn off the auto light switch whenever engaging in activit\
ies that might cause frequent 
illumination of the display.
• Note that wearing the watch under your sleeve while the auto light swit\
ch is turned on can cause frequent illumination of the display and can run down the battery.
• Illumination may not turn on if the face of the watch is more than 15 d\
egrees above or below parallel. Make sure that the back of your hand is parallel to t\
he ground.
• Illumination turns off after the preset illumination duration, even if \
you keep the watch pointed towards your face.
• Static electricity or magnetic force can interfere with proper operatio\
n of the auto light switch. If illumination does not turn on, try moving the watch bac\
k to the 
starting position (parallel with the ground) and then tilt it back tow\
ards 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.
• You may notice a very faint clicking sound coming from the watch when i\
t 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.
More than 
40°
Wear the watch on the 
outside of your wristMore than 
40°
Wear the watch on the 
outside of your wrist
Auto light switch on 
indicatorAuto light switch on 
indicator
Button Operation Tone
The button operation tone sounds any time you press one of the watch’\
s 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.
To turn the button operation tone on and off 1. In the Timekeeping Mode, hold down  E
 until the currently selected 
city code starts to fl ash. This is the city code setting screen.
• Before the city code starts to fl ash, the message  SET Hold
will appear on the display. Keep  E
 depressed until  SET Hold
disappears and the city code starts to fl ash.
2. Keep pressing  D
 until  MUTE
 or KEY
 is displayed in the upper left 
corner of the display.
• See step 3 under “To change the current time and date settings” 
for information about how to scroll through setting screens.
3.
Press A
 to toggle the button operation tone on ( KEY) and off (MUTE
).4. After the settings are the way you want, press  E
 twice to exit the 
setting screen.
Note
• The mute indicator is displayed in all modes when the button  operation tone is turned off.
Troubleshooting
Time Setting
■  The current time setting is off by one hour.
You may need to change your Home City’s standard time/daylight saving\
 time (DST) setting. Use the 
procedure under “To change the current time and date settings” to \
change the standard time/daylight 
saving time (DST) setting.
Sensor modes
■  I can’t change the temperature, barometric pressure, and altitude uni\
ts.
When TYO
 (Tokyo) is selected as the Home City, the altitude unit is set automa\
tically to meters (m), the 
barometric pressure unit to hectopascals (hPa), and the temperature un\
it to Celsius (°C). These settings 
cannot be changed.
■  “ERR” appears on the display while I am using a sensor .
Subjecting the watch to strong impact can cause sensor malfunction or im\
proper contact of internal 
circuitry. When this happens, 
ERR
 (error) will appear on the display and sensor operations will be disa\
bled.
Digital
Compass
MeasurementBarometric
Pressure/Temperature MeasurementAltitude
Measurement
•
 If  ERR
 appears while a measurement operation is being performed in a sensor mo\
de, 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 ( H
) or Level 2 ( M
), the Digital Compass Mode, Barometer/
Thermometer Mode, or Altimeter Mode sensor may be disabled if there is n\
ot enough voltage available 
to power it suffi ciently. 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 n\
ormal level.
• If  ERR
 keeps appearing during measurement, it could mean there is a problem wi\
th the applicable 
sensor.
■  ERR appears on the display after I perform bidirectional calibration or \
northerly calibration.
If - - -
 appears and then changes to  ERR
 (error) on the calibration screen, it means that there is something 
wrong with the sensor.
• If  ERR
 disappears after about one second, try performing the calibration again\
.• If ERR
 keeps appearing, contact your original dealer or nearest authorized CAS\
IO distributor to have 
the watch checked.
■  ERR appears on the display after I perform northerly calibration.
The ERR
 message indicates there may be some problem with the sensor. The  ERR
 message also may 
be due to movement of the watch while the calibration procedure is being\
 performed. Try performing 
calibration again, taking care to ensure that the watch is not moved.
If this does not solve the problem, the problem may be due to some nearb\
y source of terrestrial 
magnetism. Try performing the calibration procedure again from the begin\
ning.
Whenever you have a sensor malfunction, take the watch to your original \
dealer or nearest authorized 
CASIO distributor as soon as possible.
■  What causes incorrect direction readings?
• Incorrect bidirectional calibration. Perform bidirectional calibration.\
• Nearby source of strong magnetism, such as a household appliance, a lar\
ge steel bridge, a steel 
beam, overhead wires, etc., or an attempt to perform direction measureme\
nt on a train, boat, etc. Move 
away from large metal objects and try again. Note that digital compass o\
peration cannot be performed 
inside a train, boat, etc.
■  What causes different direction readings to produce different results at\
 the same location?
Magnetism generated by nearby high-tension wires is interfering with det\
ection of terrestrial magnetism. 
Move away from the high-tension wires and try again.
■  Why am I having problems taking direction readings indoors?
A TV, personal computer, speakers, or some other object is interfering w\
ith terrestrial magnetism 
readings. Move away from the object causing the interference or take the\
 direction reading outdoors. 
Indoor direction readings are particularly diffi cult inside ferro-concrete structures. Remember that you will 
not be able to take direction readings inside of trains, airplanes, etc.\
■  The barometric pressure differential pointer does not appear on the disp\
lay when I enter the 
Barometer/Thermometer Mode.
• This could indicate sensor error. Try pressing  B
 again.• 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)\
.
World Time Mode
■  The time for my World Time City is off in the World Time Mode.
This could be due to incorrect switching between standard time and dayli\
ght saving time. See “To specify 
standard time or daylight saving time (DST) for a city” for more in\
formation.
Charging
■  The watch does not resume operation after I expose it to light.
This can happen after the power level drops to Level 5. Continue exposin\
g the watch to light until the 
battery power indicator shows “ H
” or “ M
”.
lllllllllllllllllllllllllllllllllllllllllllllllllllllllll
Mute indicator
Module 3173
Module 3246
Mute indicator
Module 3173
Module 3246 
						

							10
Operation Guide 3173 3246
Specifi cations
Accuracy at normal temperature:
 ±15 seconds a month
Timekeeping:  Hour, minutes, seconds, p.m. (P), year, month, day, day of the week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to\
 2099
Other: 3 display formats (Day of the week, Year, Barometric pressure gr\
aph); Home City code (can be  assigned one of 48 city codes); Standard Time / Daylight Saving Time (\
summer time)
Digital Compass:  20 seconds continuous measurement; 16 directions; Angle value 0° to \
359°; Four 
direction pointers; Calibration (bidirectional, northerly); Magnetic d\
eclination correction; Bearing 
Memory
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 time\
s per day); Every fi ve seconds in the Barometer/Thermometer Mode
Other: Calibration; Manual measurement (button operation); Barometric \
pressure graph; Barometric  pressure differential pointer
Thermometer: Measurement and display range: –10.0 to 60.0°C (or 14.0 to 140.0°\
F)
Display unit: 0.1°C (or 0.2°F)
Measurement timing: Every fi ve seconds in the Barometer/Thermometer Mode
Other: Calibration; Manual measurement (button operation)
Altimeter: Measurement range: –700 to 10,000 m (or –2,300 to 32,800 ft.) wi\
thout 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.)
Current Altitude Data: 5-second intervals for 1 hour ( 0’05
), or 5-second interval for fi rst 3 minutes 
followed by 2-minute interval for next 24 hours ( 2’00
)
Altitude Memory Data: Manually saved records: 25 (altitude, date, time)
Auto saved values: Two sets (memory areas) each of high altitude and i\
ts measurement date and time, low altitude and its measurement date and time, total ascent and i\
ts save start date and 
time, total descent and its save start date and time
Other: Reference altitude setting; Altitude graph; Altitude differential\
; Altitude auto measurement  method ( 0’05
 or 2’00
)
Bearing Sensor Precision: Direction: Within ±10°
  Values are guaranteed for a temperature range of –10°C to 40°C \
(14°F to 104°F).
North pointer: Within ±2 digital segments
Pressure Sensor Precision:
Conditions (Altitude) Altimeter Barometer
Fixed
temperature 0 to 6000 m
0 to 19680 ft.
± (altitude differential × 2%
+ 15 m) m
± (altitude differential × 2%
+ 50 ft.) ft.
± (pressure differential × 2%
+ 2 hPa) hPa
± (pressure differential × 2%
+ 0.059 inHg) inHg
6000 to 10000 m
19680 to 32800 ft. ± (altitude differential × 2%
+ 25 m) m
± (altitude differential × 2%
+ 90 ft.) ft.
Effect of 
variable
temperature 0 to 6000 m
0 to 19680 ft.
± 50 m every 10°C
± 170 ft. every 50°F
± 5 hPa every 10°C
± 0.148 inHg every 50°F
6000 to 10000 m
19680 to 32800 ft. ± 70 m every 10°C
± 230 ft. every 50°F
• 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 senso\
r, and by temperature extremes.
Temperature Sensor Precision: ±2°C (±3.6°F) in range of –10°C to 60°C (14.0°\
F to 140.0°F)
Sunrise/Sunset: Sunrise time and sunset time for specifi c date, Daylight pointers
World Time:  48 cities (31 time zones)
Other: Daylight Saving Time/Standard Time
Stopwatch: Measuring unit: 1/100 second
Measuring capacity: 23:59' 59.99"
Measuring modes: Elapsed time, split time, two fi nishes
Countdown Timer: Measuring unit: 1 second
Countdown start time setting range: 1 minute to 24 hours (1-hour increm\
ents and 1-minute increments)
Alarms:  5 Daily alarms; Hourly time signal
Illumination:  EL Backlight (electro-luminescent panel); Selectable illumination dur\
ation (approximately 1 
second or 3 seconds); Auto Light Switch (Full Auto EL Light operates o\
nly 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: 6 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• 1 hour of altimeter measurement at 5-second interval, once per month• 2 hours of barometric pressure measurement per day
Frequent use of illumination runs down the battery. Particular care is r\
equired when using the auto 
light switch.
SiteLongitudeLatitude
Abu Dhabi 54°E 24°N
Addis Ababa 39°E 9°N
Adelaide 139°E 35°S
Amsterdam 5°E 52°N
Anchorage 150°W 61°N
Athens 24°E 38°N
Bangkok 100°E 14°N
Beirut 35°E 34°N
Boston 71°W 42°N
Brasilia 48°W 16°S
Buenos Aires 58°W 35°S
Cairo 31°E 30°N
Chicago 88°W 42°N
Christchurch 173°E 43°S
Dakar 17°W 15°N
Damascus 36°E 33°N
Delhi 77°E 29°N
Denver 105°W 40°N
Detroit 83°W 42°N
Dhaka 90°E 24°N
Dubai 55°E 25°N
Dublin 6°W 53°N
Edmonton 114°W 54°N
El Paso 106°W 32°N
Fernando de Noronha 32°W 4°S
Frankfurt 9°E 50°N
Guam 145°E 13°N
Hamburg 10°E 54°N
Hanoi 106°E 21°N
Helsinki 25°E 60°N
Hong Kong 114°E 22°N
Honolulu 158°W 21°N
Houston 95°W 30°N
Istanbul 29°E 41°N
Jakarta 107°E 6°S
Jeddah 39°E 21°N
Kabul 69°E 35°N
Karachi 67°E 25°N
Kathmandu 85°E 28°N
Kuala Lumpur 102°E 3°N
Kuwait 48°E 29°N
Las Vegas 115°W 36°N
Lima 77°W 12°S SiteLongitudeLatitude
Lisbon 9°W 39°N
London 0°E 51°N
Los Angeles 118°W 34°N
Madrid 4°W 40°N
Manila 121°E 15°N
Melbourne 145°E 38°S
Mexico City 99°W 19°N
Miami 80°W 26°N
Milan 9°E 45°N
Montreal 74°W 45°N
Nairobi 37°E 1°S
Nauru 167°E 1°S
New Orleans 90°W 30°N
New York 74°W 41°N
Noumea 166°E 22°S
Pago Pago 171°W 14°S
Panama City 80°W 9°N
Papeete 150°W 18°S
Paris 2°E 49°N
Perth 116°E 32°S
Phnom Penh 105°E 12°N
Port Vila 168°E 18°S
Praia 24°W 15°N
Pyongyang 126°E 39°N
Rio De Janeiro 43°E 23°S
Rome 12°E 42°N
San Francisco 122°W 38°N
Santiago 71°W 33°S
Sao Paulo 47°W 24°S
Seattle 122°W 48°N
Seoul 127°E 38°N
Singapore 104°E 1°N
St. Johns 53°W 48°N
Stockholm 18°E 59°N
Sydney 151°E 34°S
Taipei 122°E 25°N
Tehran 51°E 36°N
Tokyo 140°E 36°N
Vancouver 123°W 49°N
Vienna 16°E 48°N
Wellington 175°E 41°S
• Based on data as of December 2008.
Site Data List
City Code Table
City Code City UTC Offset/
GMT Differential
PPG Pago Pago –11
HNL Honolulu –10
ANC Anchorage –9 YVR Vancouver –8
LAX Los Angeles
YEA Edmonton –7
DEN Denver
MEX Mexico City –6
CHI Chicago
NYC New York –5
SCL Santiago –4
YHZ Halifax
YYT St. Johns –3.5RIO Rio De Janeiro –3
FEN Fernando de 
Noronha –2
RAI Praia –1
UTC 0
LIS Lisbon
LON London
MAD Madrid
+1
PAR Paris
ROM Rome BER Berlin
STO Stockholm
ATH Athens +2
CAI Cairo
JRS Jerusalem City Code City
UTC Offset/
GMT Differential
MOW Moscow +3
JED Jeddah
THR Tehran +3.5
DXB Dubai +4
KBL Kabul +4.5 KHI Karachi +5
DEL Delhi +5.5
KTM Kathmandu +5.75
DAC Dhaka +6
RGN Yangon +6.5 BKK Bangkok +7 SIN Singapore
+8
HKG Hong Kong
BJS Beijing
TPE Taipei
SEL Seoul +9
TYO Tokyo
ADL Adelaide +9.5
GUM Guam +10
SYD Sydney
NOU Noumea +11
WLG Wellington +12
• Based on data as of December 2009.• The rules governing global times (GMT differential  and UTC offset) and summer time are determined 
by each individual country.