Casio 2825 User manual

Operation Guide 2825
1
MO0406-EB
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out
of your purchase, be sure to carefully read this manual and keep it on hand
for later reference when necessary.
Expose the watch to bright light to charge its battery before using it.
You can use this watch even as its battery is being charged by exposure to
bright light.
••
••
•Be sure to read “Battery” of this manual for important
information you need to know when exposing the watch to bright
light.
Applications
The built-in sensors of this watch measure direction, barometric pressure,
temperature and underwater depth. Measured values are then shown on the
display. Such features make this watch useful when hiking, mountain
climbing, skin diving, or snorkeling, or when engaging in other such outdoor
activities.
If the digital display of the watch is blank...
If the P.SAVE indicator is on the display (either
flashing or steady), it means that the display is
blank because the watch’s Power Saving function
has turned off the display to conserve power.
Power Saving automatically turns off the display
and enters a sleep state whenever the watch is
left for a certain period where it is dark.
•The initial factory default setting is Power Saving on.
•The watch recovers from the sleep state if you move it to a well-lit area,*if
you press any button, or if you angle the watch towards your face for
reading.
*
It can take up to two seconds for the display to turn on.
•See “Power Saving Function” for more information.
Warning!
•The measurement functions built into this watch are not intended for
taking measurements that require professional or industrial precision.
Values produced by this watch should be considered as reasonable
representations only.
•When engaging in mountain climbing or other activities in which losing
your way can create a dangerous or life-threatening situation, always be
sure to use a second compass to confirm direction readings.
•This watch is intended for use up to skin diving and snorkeling. Never
use this watch while scuba diving.
•Never operate the buttons of the watch while underwater.
•CASIO COMPUTER CO., LTD. assumes no responsibility for any loss,
or any claims by third parties that may arise through the use of this
watch.
About This Manual
•Button operations are indicated using the
letters shown in the illustration.
•Each section of this manual provides you with
the information you need to perform operations
in each mode. Further details and technical
information can be found in the “Reference”
section.
(Light)
•Pressing B, C, or Ewhile in the Timekeeping Mode directly enters the
applicable sensor mode. To enter a sensor mode from the Countdown
Timer, Stopwatch, or Alarm Mode, first enter the Timekeeping Mode and
then press the applicable button.
Timekeeping Mode
Barometer/
Thermometer Mode Depth Gauge Mode
Press C.
General Guide
•The illustration below shows which buttons you need to press to navigate
between modes.
•In any mode, press Lto illuminate the display.
Countdown
Timer Mode
Stopwatch Mode
▲
Digital
Compass Mode
Press D.
▲
▲
Press E.
Alarm Mode
▲
▲
Press D.
▲
▲
Press B.
▲
Sensor Modes
Timekeeping
Use the Timekeeping Mode to view the current
time and date.You also need to enter the
Timekeeping Mode to configure timekeeping
settings, as well as the following settings.
•Display illumination duration (“To specify the
illumination duration”)
•Power saving on/off (“To turn Power Saving on
and off”)
•Temperature unit (“To specify barometric
pressure and temperature units”)
•Depth unit (“To specify the depth unit”)
•Barometric pressure unit (“To specify
barometric pressure and temperature units”)
Hour : Minutes
PM indicator
Seconds
Month – Day
Day of week
To set the time and date
1. In the Timekeeping Mode, hold down Auntil the seconds start to flash,
which indicates the setting screen.
2. Press Dto cycle through the setting items in the sequence shown below,
and display the one you want to configure.
Year
Seconds Hour Minutes
Day
Month
12/24-Hour
Format
Power
Saving
Barometric
Pressure Unit Depth Unit Temperature Unit
•The following steps explain how to configure timekeeping settings only.
See the other sections of this manual for information about configuring
the display illumination duration, Power Saving, Temperature Unit, Depth
Unit, and Barometric Pressure Unit settings.
3. When the timekeeping setting you want to change is flashing, use Eand/
or Bto change it as described below.
4. After the settings are the way you want, press Ato exit the setting screen.
Note
•Resetting the seconds to 00 while the current count is in the range of 30 to
59 causes the minutes to be increased by 1. In the range of 00 to 29, the
seconds are reset to 00 without changing the minutes.
•With the 12-hour format, the P(PM) indicator appears on the display for
times in the range of noon to 11:59 p.m. and no indicator appears for times
in the range of midnight to 11:59 a.m.
Do this:
Press E.
Use E(+) and B(–).
Press E.
Press E(+) and B(–).
To do this:
Reset the seconds to 00
Change the hour or minutes
Toggle between 12-hour (12H)
and 24-hour (24H) timekeeping
Change the year, month, or day
Screen

Operation Guide 2825
2
•With the 24-hour format, times are displayed in the range of 0:00 to 23:59,
without any indicator.
•The 12-hour/24-hour timekeeping format you select in the Timekeeping
Mode is applied in all modes.
•The year can be set in the range of 2000 to 2039. The day of the week is
calculated automatically in accordance with the date you set.
•The watch’s built-in full automatic calendar automatically makes allowances
for different month lengths and leap years. Once you set the date, there
should be no reason to change it except when battery power drops to Level
4.
Digital Compass
A built-in bearing sensor detects magnetic north and indicates one of 16
directions on the display. Direction readings are performed in the Digital
Compass Mode.
•You can calibrate the bearing sensor if you suspect the direction reading is
incorrect.
To enter and exit the Digital Compass Mode
1. While in the Timekeeping or Barometer/Thermometer Mode, press Bto
enter the Digital Compass Mode.
•At this time, the watch immediately starts a Digital Compass operation.
After about two seconds, letters appear on the display to indicate the
direction that the 12 o’clock position of the watch is pointing.
2. Press Dto return to the Timekeeping Mode.
To take a direction reading
1. Enter the Digital Compass Mode.
2. Place the watch on a flat surface or, if you are
wearing the watch, make sure that your wrist
is horizontal (in relation to the horizon).
3. Point the 12 o’clock position of the watch in
the direction you want to measure.
4. Press Bto start a Digital Compass
measurement operation.
•After about two seconds, the direction that the
12 o’clock position of the watch is pointing
appears on the display.
•Also, four pointers appear to indicate magnetic
north, south, east, and west.
•After the first reading is obtained, the watch
continues to take direction readings
automatically each second, for up to 20
seconds.
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Direction
indicator
Angle value (in degrees)
Magnetic north pointer
12 o’clock position
NW
0°
WNW
W
WSW
SW
SSW
S
SSE
SE
ESE
E
ENE
NE
NNE
N
NNW
•During measurement, the watch displays an angle value, a direction
indicator, and four direction pointers, which change dynamically when the
watch is moved. After measurement is complete, the angle value,
direction indicator, and four direction pointers are frozen in accordance
with the last measurement.
•The indicator flashes on the display while a measurement is in
progress.
Note
•Note that taking a measurement
while the watch is not horizontal
(in relation to the horizon) can
result in large measurement error.
•The margin of error for the angle value is ±11 degrees. If the indicated
direction is northwest (NW) and 315 degrees, for example, the actual
direction can be anywhere from 304 to 326 degrees.
•Any ongoing direction measurement operation is temporarily paused while
the watch is performing an alert operation (daily alarm, Hourly Time Signal,
countdown timer alarm) or while the watch’s backlight is turned on (by
pressing L). The measurement operation resumes for its remaining
duration after the operation that caused it to pause is finished.
•The following table shows the meanings of each of the direction
abbreviations that appear on the display.
Direction Meaning Direction Meaning Direction Meaning Direction Meaning
NNE
ESE
SSW
WNW
NE
SE
SW
NW
North-
northeast
East-
southeast
South-
southwest
West-
northwest
Northeast
Southeast
Southwest
Northwest
East-
northeast
South-
southeast
West-
southwest
North-
northwest
ENE
SSE
WSW
NNW
North
East
South
West
N
E
S
W
•You can adjust the rotary direction bezel so
that the is aligned with the magnetic north
pointer. This aligns all of the direction angle
markings on the bezel with their correct
directions.
•See “Digital Compass Precautions” for other
important information about taking direction
readings.
Direction bezel
Barometer/Thermometer
This watch uses a pressure sensor to measure air pressure (barometric
pressure) and a temperature sensor to measure temperature.
•You can calibrate the temperature sensor and the pressure sensor if you
suspect that readings are incorrect.
To take barometric pressure and temperature readings
Pressing Cin the the Timekeeping or Digital Compass Mode enters the
Barometer/Thermometer Mode and automatically starts taking barometric
pressure and temperature measurements.
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▲
▲
Press Cto
toggle between
screens.
History Graph and
Barometric Pressure
History graph
Temperature
Barometric
pressure
Temperature and
Barometric Pressure
•It can take up to four or five seconds for the barometric pressure reading to
appear after you enter the Barometer/Thermometer Mode.
•Barometric pressure is displayed in units of 1hPa (or 0.05 inHg).
•The displayed barometric pressure value changes to xxxx hPa (or inHg) if
a measured barometric pressure falls outside the range of 600 hPa to 1100
hPa (17.70 inHg to 32.45 inHg). The barometric pressure value will be
displayed again as soon as the measured barometric pressure is within the
allowable range.
•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 be displayed again as soon as the
measured temperature is within the allowable range.
•In some areas, barometric pressure is expressed in millibars (mb) instead
of hecto-pascals (hPa). It really makes no difference, because 1hPa = 1mb.
•You can select either hectopascals (hPa) or inchesHg (inHg) as the display
unit for the measured barometric pressure, and Celsius (°C) or Fahrenheit
(°F) as the display unit for the measured temperature value. See “To specify
barometric pressure and temperature units”.
•See “Barometer and Thermometer Precautions” for important precautions.
Barometric Pressure History Graph
Barometric pressure indicates changes in the atmosphere. By monitoring
these changes you can predict the weather with reasonable accuracy.
The barometric pressure history graph contains points that show you the
changes in barometric pressure readings taken by the watch for up to the last
18 hours. The rightmost point on the graph is the latest reading. The relative
positions of the points on the graph indicate whether barometric pressure is
rising, falling, or holding relatively steady.
•Though you can configure the watch to display barometric pressure in units
of hPa or inHg, the history graph displays changes in hPa units only.
Relatively steady (within ± 2hPa)
Small rise (3hPa to 4hPa)
Small drop (3hPa to 4hPa)
Large rise (5hPa or more)
Large drop (5hPa or more)
•If a measurement operation cannot be performed by the watch due to
sensor malfunction, low battery power, or some other reason, the value
produced by next successful barometric pressure measurement is
compared with the value of the last successful measurement and plotted on
the history graph accordingly.
•Note that barometric pressure measurement is not performed while the
watch is in the Depth Gauge Mode. The value produced by the next
successful barometric pressure measurement is compared with the value of
the last successful measurement and plotted on the history graph
accordingly.
The following shows how to interpret the data that appears on the barometric
pressure history graph.
A rising graph generally means improving weather.
A falling graph generally means deteriorating weather.

Operation Guide 2825
3
To specify barometric pressure and temperature units
1. Enter the Timekeeping Mode.
2. Hold down Auntil the seconds start to flash,
which indicates the setting screen.
3. Use Dto select either the temperature unit or
barometric pressure unit setting.
•See step 2 under “To set the time and date”
for information about how to scroll through
setting screens.
4. When the setting you want to change is flashing, press Eto toggle
between the available settings.
•Temperature Units: Fahrenheit (°F) or Celsius (°C)
•Barometric Pressure Units: inchesHg (inHg) or Hectopascals (hPa)
5. After the settings are the way you want, press Ato exit the setting screen.
•Changing the barometric pressure unit automatically restarts the
barometric pressure history graph.
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About Barometric and Temperature Measurements
•Barometric pressure and temperature measurement operations are
performed as soon as you enter the Barometer/Thermometer Mode. After
that, barometric pressure and temperature measurements are taken every
five seconds for the first two or three minutes.
•The indicator flashes while the watch is taking a barometric
pressure reading.
•The barometer automatically takes measurements every three hours
(starting from midnight), regardless of what mode you are in. The results of
these measurements are used for plotting points on the barometric
pressure history graph.
•You can also perform a barometric pressure and temperature measurement
at any time by pressing Cin the Barometer/Thermometer Mode.
Barometer and Thermometer Precautions
•The pressure sensor built into this watch measures changes in air
pressure, which you can then apply to your own weather predictions. It is
not intended for use as a precision instrument in official weather prediction
or reporting applications.
•Sudden temperature changes can affect pressure sensor readings.
•Temperature measurements are affected by your body temperature (while
you are wearing the watch), direct sunlight, and moisture. To achieve a
more accurate temperature measurement, remove the watch from your
wrist, place it in a well ventilated location out of direct sunlight, and wipe all
moisture from the case. It takes approximately 20 to 30 minutes for the
case of the watch to reach the actual surrounding temperature.
Depth Gauge
The pressure sensor of the watch can also be used to perform underwater
depth measurement while skin diving or snorkeling. Depth readings are taken
every three seconds, and displayed as a value up to 30 meters (98 feet). You
can store the data of your last dive in log memory, including total time
submerged, maximum depth, and water temperature at the maximum depth
attained during your dive. You can view the log data of your last dive before
beginning a new dive, and even take direction readings while in the Depth
Gauge Mode.
Important!
•Never use this watch to measure depth while scuba diving.
•This watch is designed to start depth measurement and record data in
memory after a depth of 1 meter (4 feet) is reached. Because of this, the
explanations in this manual uses the term “submerged” to refer to any
depth deeper than 1 meter, and the “on the surface” to refer to any depth
shallower than 1 meter.
•
Leaving the watch in the Depth Gauge Mode while not in the water consumes
battery power. Exit the Depth Gauge Mode whenever you are not using it.
What is “a dive”?
A dive starts when you pass a depth of one meter (about four feet) while the
watch is in the Depth Gauge Mode. The dive ends when you are on the
surface and exit the Depth Gauge Mode. A dive does not end if you surface
but do not exit the Depth Gauge Mode.
Enter the Depth Gauge Mode. Exit the Depth Gauge Mode.
Start of dive
Total time submerged: 1 minute 50 seconds
Maximum depth 20 sec.
30 sec.
1 min.
Depth = 1.0 m
(4 ft.)
End of dive
•Remember that the term “dive” as used in this manual refers to skin diving
or snorkeling only.
•The watch will start depth measurement automatically when the sensor
detects that your depth exceeds one meter (about four feet).
•Depth measurement stops automatically whenever your depth becomes
less than one meter (four feet).
•Depth measurement restarts whenever you re-submerge past one meter
(four feet). All data that is measured between the start of the dive and the
end of the dive is treated as part of the same dive, no matter how many
times you surface during the dive.
To perform depth measurement
1. Before beginning a dive, in the Timekeeping,
Digital Compass, or Barometer/Thermometer
Mode, press Eto enter the Depth Gauge
Mode.
•It can take up to four or five seconds until
(or 0) appears on the display.
2. Enter the water and submerge past one meter
(four feet) to start the dive.
Current depth
Elapsed measurement time
3. When you want to end the dive, return to the surface and then press Dto
exit the Depth Gauge Mode.
•Exiting the Depth Gauge Mode causes the data accumulated during the
dive (time submerged, maximum depth attained, water temperature at
maximum depth) to be stored in log memory.
•The watch will not exit the Depth Gauge Mode if any value other than
(or 0) is displayed for the depth when you press D. If (or 0) does not
appear on the display even though you are on the surface (depth of less
than 1 meter/4 feet), perform the procedure under “To manually reset the
reference depth to 0 meters (feet)”.
•See “Log Data” for information about viewing dive data.
Important!
Note the following important precautions whenever using the Depth Gauge
Mode.
Before Skin Diving/Snorkeling
•Before beginning a dive, check to make sure that none of the
following marks are shown on the display.
❑CHARGE (indicating a weak battery)
❑RECOV. (indicating a weak battery)
❑Err (indicating sensor malfunction)
•Make sure that (or 0) is displayed at your current depth.
•Make sure that the watch is set to the correct time of day.
•Check the glass, case and band for cracks or chips.
•Make sure that the band is fastened securely around your wrist.
While Skin Diving/Snorkeling
•Check to make sure that timer operation and depth measurement are
being performed properly.
•Take care when skin diving/snorkeling near rocks or coral to avoid
scratching the watch.
After Skin Diving/Snorkeling
•To avoid corrosion, rinse your watch thoroughly with fresh water to
remove salt water, dirt, etc. When possible, soak the watch in fresh
water overnight to make sure that all salt is removed.
•When using a metal band, occasionally clean inside the gaps in the
band using a soft toothbrush and soapy water. Failure to do so can
result in corrosion of the timepiece, soiling of clothing or irritation to
sensitive skin.
Depth Gauge Mode Precautions
•After you enter the Depth Gauge Mode, the watch automatically takes a
reference pressure reading and sets the result a 0 meters (feet). This
means that before starting a dive, you should enter the Depth Gauge Mode
while at the water’s surface, never while the watch is submerged.
•A major change in air temperature or other phenomena while you are using
the Depth Gauge Mode can cause the display to show a value other than 0
meters (feet) when you are at the surface of the water. If this happens, reset
the reference depth to 0 meters (feet). See “To manually reset the reference
depth to 0 meters (feet)” for more information.
•Depth values are displayed in units of 0.1 meter (or 1 foot).
•(or 0) appears on the display whenever your depth is less than one
meter (four feet).
•dEEP is displayed in place of the depth value whenever your depth is
greater than 30 meters (98 feet). If you continue to dive deeper after dEEP
appears, xx.xwill appear in place of the depth value. If xx.xremains on
the display after you surface, hold down Dfor three seconds to exit the
Depth Gauge Mode. If xx.xkeeps appearing in place of the depth value, it
could mean that the sensor is malfunctioning. Take the watch to the place
where you purchased it or to some other CASIO retailer to have it checked.
•If the elapsed measurement time exceeds three hours, the watch will
automatically switch to the Timekeeping Mode and store the data for the
current dive into log memory.

Operation Guide 2825
4
•The progress beeper and auto-repeat timer alarm do not sound while the
watch is in the Depth Gauge Mode.
•The watch can take about five minutes to display the correct water
temperature when there is a great difference between air temperature and
water temperature, when there is a sudden change in water temperature,
etc.
To specify the depth unit
1. Enter the Timekeeping Mode.
2. Hold down Auntil the seconds start to flash,
which indicates the setting screen.
3. Press Dnine times to select the depth unit
setting.
•See step 2 under “To set the time and date”
for information about how to scroll through
setting screens.
4. Press Eto toggle between meters (m) and
feet (ft).
5. After the setting is the way you want, press A
to exit the setting screen.
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To view water temperature and maximum depth screen
Pressing Ein the Depth Gauge Mode displays the Water Temperature/
Maximum Depth screen. After about five or six seconds, the watch will return
to the Elapsed Measurement Time/Current Depth screen automatically.
•You can also return to the Elapsed Measurement Time/Current Depth
screen by pressing Eagain.
•Never operate the buttons of the watch while underwater.
Elapsed Measurement Time/
Current Depth Screen
Elapsed
measurement time
(hours, minutes,
seconds)
Water temperature
Current
depth
Water Temperature/
Maximum Depth Screen
Maximum
depth
▲
Press E.
▲
To take a direction reading in the Depth Gauge Mode
1. In the Depth Gauge Mode, place the watch on
a flat surface or, if you are wearing the watch,
make sure that your wrist is horizontal (in
relation to the horizon).
2. Point the 12 o’clock position of the watch in
the direction you want to read.
3. While the Elapsed Measurement Time/Current
Depth screen is displayed, press Bto start
direction reading operation.
•After about two seconds, the direction that the
12 o’clock position of the watch is pointing
appears on the display.
•Also, four pointers appear to indicate magnetic
north, south, east, and west.
•About five or six seconds after displaying the Digital Compass screen, the
watch will return to the Elapsed Measurement Time/Current Depth screen
automatically.
•You can also return to the Elapsed Measurement Time/Current Depth
screen by pressing Bagain.
Angle value
(in degrees)
Direction
indicator
Magnetic north pointer
12 o’clock position
Log Data
Exiting the Depth Gauge Mode after a dive causes the measured data to be
stored automatically into log memory. Stored data remains in log memory
until you start a new dive, which causes the existing data to be replaced with
the data of the new dive.
There is memory for a single log memory record, which includes the following
data.
Total Time Submerged: This value shows the cumulative amount of time
(hours, minutes, seconds) that you spend submerged at a depth of
one meter (four feet) or greater.
Maximum depth: This value shows the maximum depth you attained during
the dive.
Water temperature at maximum depth: This value shows the water
temperature at the maximum depth attained during the dive.
Perform the following steps to view the log data that is currently stored in
memory.
To view log data
1. Enter the Depth Gauge Mode.
2. While (or 0) is shown on the display, press Cto cycle through the data
screens in the sequence shown below.
Maximum
depth
Water temperature at
maximum depth
Total time submerged
▲
Press
C.
Depth Gauge
Mode Screen
Log Data Screens
▲
C
Log data screen indicator
C
▲
•About five or six seconds after displaying a Log Data screen, the watch
will return to the Depth Gauge Mode screen automatically.
•You cannot view log memory data while a depth measurement operation
is in progress.
3. To exit the Depth Gauge Mode, press D.
To delete log memory data
1. Enter the Depth Gauge Mode.
2. While (or 0) is shown on the display, press Cto display the log
memory data.
3. Hold down Afor about two seconds until the log data is deleted and the
watch returns to the Depth Gauge Mode screen.
4. To exit the Depth Gauge Mode, press D.
Countdown Timer
You can set a countdown timer start time in the
range of 1 minute to 24 hours. An alarm sounds
when the countdown reaches zero. An auto-
repeat feature causes the countdown to restart
automatically when the end of a countdown is
reached, and a progress beeper signals the
progress of the countdown. All of this makes the
countdown timer a valuable tool for timing the
start of a yacht race.
•All of the operations in this section are
performed in the Countdown Timer Mode,
which you enter by pressing D.
Configuring the Countdown Timer
The following are the settings you should configure before actually using the
countdown timer.
•Countdown start time
•Auto-repeat on/off
•Progress beeper on/off
1/10 second
Seconds
Minutes
Hours
Countdown start time
You can set a countdown start time from 1 minute to 24 hours.
Auto-repeat
Whenever zero is reached, the watch beeps (Auto-repeat timer alarm) and
auto-repeat automatically restarts the countdown from the countdown start
time you set. Turning off auto-repeat causes the countdown to stop and the
countdown start time to appear on the display when the end of the countdown
is reached.
Progress Beeper
When the progress beeper is turned on, the watch beeps at minute 10, 5, 4,
3, 2, and 1, of the countdown, and at the second 50, 40, 30, 20, 10, 5, 4, 3, 2,
and 1 of the final minute of the countdown.
To set the countdown start time and auto-repeat on/off
1. While the countdown start time is on the
display in the Countdown Timer Mode, hold
down Auntil the hour setting of the
countdown start time starts to flash, which
indicates the setting screen.
•If the countdown start time is not displayed,
use the procedure under “To use the
countdown timer” to display it.
2. Press Dto move the flashing in the
sequence shown below to select other
settings.
3. Perform the following operations, depending
on which setting is currently selected on the
display.
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Auto-repeat
on/off
Hours Minutes
Auto-repeat indicator

Operation Guide 2825
5
•While the hour or minute setting is flashing, use E(+) or B(–) to
change it.
•For a 24-hour countdown, set a start time of 0:00.
•While the auto-repeat on/off setting (ON or OFF) is flashing on the
display, press Eto toggle auto-repeat on (ON) and off (OFF).
4. Press Ato exit the setting screen.
•The auto-repeat indicator ( ) appears on the display while auto-repeat is
turned on.
To turn the progress beeper on and off
Pressing Bwhile the countdown start time is on
the display or while a countdown timer operation
is in progress in the Countdown Timer Mode
toggles progress beeper operation on (
displayed) and off ( not displayed).
Progress beeper
on indicator
To use the countdown timer
Press Ewhile in the Countdown Timer Mode to start the countdown timer.
•When the countdown reaches zero, the alarm sounds for 10 seconds or
until you stop it by pressing any button.
•Press Ewhile a countdown operation is in progress to pause it. Press E
again to resume the countdown.
•The countdown timer operation continues even if you exit the Countdown
Timer Mode.
•To completely stop a countdown operation, first pause it (by pressing E),
and then press B. This returns the countdown time to its starting value.
•The following describes what happens if you enter the Depth Gauge Mode
for diving while a countdown operation is in progress.
Auto-repeat off: The alarm sounds when the end of the countdown is
reached. The progress beeper does not sound.
Auto-repeat on: Auto-repeat timer alarm does not sound when the end of
a countdown is reached. The progress beeper does not sound.
•Frequent use of auto-repeat and the alarm can run down battery power.
Stopwatch
The stopwatch lets you measure elapsed time,
split times, and two finishes.
•The display range of the stopwatch is 23 hours,
59 minutes, 59.99 seconds.
•The stopwatch continues to run, restarting from
zero after it reaches its limit, until you stop it.
•The stopwatch measurement operation
continues even if you exit the Stopwatch Mode.
•Exiting the Stopwatch Mode while a split time is
frozen on the display clears the split time and
returns to elapsed time measurement.
•All of the operations in this section are
performed in the Stopwatch Mode, which you
enter by pressing D.
Hours Minutes
Seconds
1/100 second
To measure times with the stopwatch
J
J
J
Elapsed Time
EE E E B
Start Stop Re-start Stop Clear
Split Time
EB B E B
Start Split Split release Stop Clear
(SPL displayed)
Two Finishes
EB E B B
Start Split Stop Split release Clear
JJ
JJ J
JJ J
First runner
finishes.
Display time
of first runner.
Display time of
second runner.
Second runner
finishes.
J
Alarms
You can set five independent daily alarms. When
an alarm is turned on, the alarm tone sounds
when the alarm time is reached.
You can also turn on an Hourly Time Signal,
which will cause the watch to beep twice every
hour on the hour.
•The alarm number (ALM -1 through
ALM -5) indicates an alarm screen. SIG is
shown for the alarm number 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 first.
•All of the operations in this section are
performed in the Alarm Mode, which you enter
by pressing D.
Alarm Time
(Hour : Minutes)
Alarm number
Alarm on indicator
Hourly Time Signal
on indicator
To set an alarm time
1. In the Alarm Mode, use Eto scroll through
the alarm screens until the one whose time
you want to set is displayed.
2. Hold down Auntil the hour digits of the alarm time start to flash, which
indicates the setting screen.
•This automatically turns on the alarm.
3. Press Dto move the flashing between the hour and minute settings.
4. While a setting is flashing, use E(+) and B(–) 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. (Pindicator).
5. Press Ato exit the setting screen.
ALM -1
SIG
ALM -2 ALM -3
ALM -4
ALM -5
Alarm Operation
The alarm sounds at the preset time for about 10 seconds (in all modes), or
until you stop it by pressing any button.
To test the alarm
In the Alarm Mode, hold down Eto sound the alarm.
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, use Eto select an alarm or the Hourly Time Signal.
2. When the alarm or the Hourly Time Signal you want to is selected, press
Bto turn it on and off.
Indicates alarm is ON.
Indicates Hourly Time Signal is ON.
•The alarm on indicator ( ) and the Hourly Time Signal on indicator ( )
are shown on the display in all modes while these functions are turned on.
•If any alarm is on, the alarm on indicator is shown on the display in all
modes.
Backlight
The backlight uses an EL (electro-luminescent)
panel that causes the entire display to glow for
easy reading in the dark. The watch’s auto light
switch automatically turns on the backlight when
you angle the watch towards your face.
•The auto light switch must be turned on
(indicated by the auto light switch on indicator)
for it to operate.
•You can specify 1.5 seconds or 2.5 seconds as
the display illumination duration.
•See “Backlight Precautions” for other important
information about using the backlight.
Auto light switch on
indicator
To turn on the backlight manually
Press Lin any mode to illuminate the display.
•The above operation turns on the backlight regardless of the current auto
light switch setting.
About the Auto Light Switch
Tu r ning on the auto light switch causes the backlight to turn on, whenever you
position your wrist as described below in any mode.
Note that this watch features a “Full Auto EL Light”, so the auto light switch
operates only when available light is below a certain level. It does not turn on
the backlight under bright light.

Operation Guide 2825
6
Moving the watch to a position that is parallel to the ground and then tilting
it towards you more than 40 degrees causes the backlight to turn on.
•Wear the watch on the outside of your wrist.
Warning!
•Always make sure you are in a safe place whenever you are reading
the display of the watch using the auto light switch. Be especially
careful when running or engaged in any other activity that can result
in accident or injury. Also take care that sudden illumination by the
auto light switch does not surprise or distract others around you.
Parallel to
ground More than
40
°
•When you are wearing the watch, make sure that its auto light switch
is turned off before riding on a bicycle or operating a motorcycle or
any other motor vehicle. Sudden and unintended operation of the auto
light switch can create a distraction, which can result in a traffic
accident and serious personal injury.
To turn the auto light switch on and off
In any mode except while a setting is flashing on the display, hold down Lfor
about two seconds to toggle the auto light switch on ( displayed) or off (
not displayed).
•The auto light switch on indicator ( ) 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 3.
•The backlight may not light right away if you raise the watch to your face
while a barometric pressure operation is in progress.
•The auto light switch is always disabled, regardless of its on/off setting,
when any one of the following conditions exists.
While a direction measurement operation is being performed in the
Digital Compass Mode or Depth Gauge Mode
While a bearing sensor calibration operation is being performed in the
Digital Compass Mode
To specify the illumination duration
1. In the Timekeeping Mode, hold down Auntil
the seconds start to flash, which indicates the
setting screen.
2. Press Bto toggle the illumination duration
setting between 2.5 seconds ( ) and 1.5
seconds ( ).
3. After the setting is the way you want, press A
to exit the setting screen.
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Questions & Answers
Question: What causes incorrect direction readings?
Answer:
•Incorrect bidirectional calibration. Perform bidirectional calibration.
•Nearby source of strong magnetism, such as a household appliance, a
large steel bridge, a steel beam, overhead wires, etc., or an attempt to
perform direction measurement on a train, boat, etc. Move away from large
metal objects and try again. Note that digital compass operation cannot be
performed inside a train, boat, etc.
Question: What causes different direction readings to produce different
results at the same location ?
Answer: Magnetism generated by nearby high-tension wires is interfering
with detection of terrestrial magnetism. Move away from the high-
tension wires and try again.
Question: Why am I having problems taking direction readings indoors ?
Answer: A TV, personal computer, speakers, or some other object is
interfering with terrestrial magnetism readings. Move away from
the object causing the interference or take the direction reading
outdoors. Indoor direction readings are particularly difficult inside
ferro-concrete structures. Remember that you will not be able to
take direction readings inside of trains, airplanes, etc.
Question: What do the numbers on the watch mean ?
Answer: The face of this watch is marked with values that
increase in a counter- clockwise direction.
These values represent degrees. When you take a
direction reading, you can use these values to find
out how many degrees the 12 o’clock position of
this watch (which is the direction indicated in the
display) differs from magnetic north.
For example, when the Magnetic North Pointer is
Pointing at 90 on the watch’s face, it means that
the 12 o’clock position is 90 degrees from
magnetic north (which means that the 12 o’clock
pointing due east).
Question: How does the barometer work?
Answer: Barometric pressure indicates changes in the atmosphere, and by
monitoring these changes you can predict the weather with
reasonable accuracy. Rising atmospheric pressure indicates good
weather, while falling pressure indicates deteriorating weather
conditions.
The barometric pressures that you see in the newspaper and on
the TV weather report are measurements corrected to values
measured at 0 m sea level.
Question: How does the watch calculate depth values?
Answer: Water pressure increases with depth. In the case of sea water
(specific gravity=1.025), water pressure increases by 1 ATM
(1.03 kg/cm2) with each 10 meters (33 feet) of depth.
The pressure sensor of this watch measures water pressure, and
then converts it to an underwater depth reading, based on the
relationship between pressure and depth.
Question: Is there anything I need to keep in mind when diving at high
altitudes or in fresh water?
Answer: The depth reading is automatically reset to “0.0 m (0 ft)” whenever
the Depth Gauge Mode is entered, so you can use this watch for
skin diving at altitudes. Note, however, that malfunctions occur
when skin diving at altitudes greater than approximately 4,000
meters (13,000 ft.). In addition, as this watch bases its
calculations on sea water, which has a specific gravity of 1.025,
readings will be incorrect during fresh-water skin diving. During
fresh-water dives, you must assume that you are approximately
2.5% deeper than the depth shown on the display.
Example: When displayed depth is 5 meters, actual depth is
5 ×1.025 = 5.1 meters.
Battery
This watch is equipped with a solar cell and a rechargeable battery
(secondary battery) that is charged by the electrical power produced by the
solar cell. The illustration shown below shows how you should position the
watch for charging.
Example: Orient the watch so its face is
pointing at a light source.
•The illustration shows how to position a
watch with a resin band.
•Note that charging efficiency drops when
any part of the solar cell is blocked by
clothing, etc.
•Normally, you should try to keep the
watch outside of your sleeve as much as
possible. Charging is significantly reduced
if the face is only partially covered.
Solar cell
Important!
•Storing the watch for long periods in an area where there is no light or
wearing it in such a way that it is blocked from exposure to light can cause
rechargeable battery power to run down. Be sure that the watch is normally
exposed to bright light whenever possible.
•Normally, the rechargeable battery should not need replacement, but after
very long use over a number of years, the rechargeable battery may lose its
ability to achieve a full charge. If you experience problems getting the
rechargeable battery to a full charge, contact your dealer or CASIO
distributor about having the rechargeable battery replaced.
•The rechargeable battery should be replaced with a CASIO-specified
CTL1616 battery only. Other rechargeable batteries can cause damage to
the watch.
•All data stored in memory is deleted, and the current time and all other
settings return to their initial factory defaults whenever battery power drops
to Level 4 and when you have the battery replaced.
•Turn on the watch’s Power Saving function and keep it in an area normally
exposed to bright light when storing it for long periods. This helps to keep
the rechargeable battery from going dead.
•The flashing CHARGE indicator at Level 3 tells you that battery power is
very low, and that exposure to bright light for charging is required as soon
as possible.
Battery Power Indicator and Recover Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Battery power
indicator
Level
1
2
3
4
Battery Power
Indicator Function Status
All functions enabled.
All functions enabled.
Except for timekeeping and
battery power indicator, all
functions and display indicators
are disabled.
All functions disabled.
(Charge Soon Alert)
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Operation Guide 2825
7
•At Level 4, all functions are disabled and settings return to their initial
factory defaults. Once the battery reaches Level 2 (M) after falling to Level
4, reconfigure the current time, date, and other settings.
•Display indicators reappear as soon as the battery is charged from Level 4
to Level 3.
•Leaving the watch in direct sunlight or some other very strong light source
can cause the battery power indicator to temporarily show a reading that is
higher than the actual battery level. The correct battery power indicator
should appear after a few minutes.
•If you use the backlight or the alarm a number
of times during a short period, RECOV.
appears on the display and the backlight,
alarm, hourly time signal, and sensor
operations become disabled until battery power
recovers.
After some time, battery power will recover and
RECOV. will disappear, indicating that the
above functions are enabled again.
Recover indicator
•Even if battery power is at Level 1 or Level 2, the Digital Compass Mode,
Barometer/Thermometer Mode, or Depth Gauge Mode sensor may be
disabled if there is not enough voltage available to power it sufficiently. This
is indicated by RECOV. on the display.
If battery power goes low while a measurement operation is in progress,
the value produced by the last successful measurement operation remains
on the display. Attempting a measurement operation while battery power is
too low will cause the display to go blank.
Sensor operation should resume when battery voltage returns to normal
levels.
•If RECOV. starts to flash while a Depth Gauge Mode depth measurement
operation is in progress, the measurement operation will continue. Though
the elapsed measurement time will be recorded in log memory, maximum
depth and water temperature values are not. In this case, xx.xis displayed
in place of the maximum depth and water temperature. After you surface
from your dive, hold down Dfor about three seconds to exit the Depth
Gauge Mode to clear RECOV.
•If RECOV. appears frequently, it probably means that remaining battery
power is low. Leave the watch in bright light to allow it to charge.
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid
leaving the watch in the areas described below whenever charging its
rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid
crystal display to black out. The appearance of the LCD should become
normal again when the watch returns to a lower temperature.
Warning!
Leaving the watch in bright light to charge its rechargeable battery can
cause it to become quite hot. Take care when handling the watch to
avoid burn injury. The watch can become particularly hot when exposed
to the following conditions for long periods.
•On the dashboard of a car parked in direct sunlight
•Too close to an incandescent lamp
•Under direct sunlight
Charging Guide
After a full charge, timekeeping remains enabled for up to about five months.
•The following table shows the amount of time the watch needs to be
exposed to light each day in order to generate enough power for normal
daily operations.
•Since these are the specs, we can include all the technical details.
•Watch is not exposed to light
•Internal timekeeping
•Display on 18 hours per day, sleep state 6 hours per day
•1 backlight operation (1.5 seconds) per day
•10 seconds of alarm operation per day
•1 direction reading (20 seconds continuous measurement) per day
•30 seconds of Barometric/Thermometer Mode measurements per
day
•Stable operation is promoted by frequent charging.
Approximate
Exposure Time
5 minutes
24 minutes
48 minutes
8 hours
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
Recovery Times
The table below shows the amount exposure that is required to take the
battery from one level to the next.
•The above exposure time values are all for reference only. Actual required
exposure times depend on lighting conditions.
Approximate Exposure Time
Level 4 Level 3 Level 2 Level 1
1 hour 15 hours 3 hours
4 hours 73 hours 15 hours
6 hours 149 hours 30 hours
71 hours - - - - - - - - - - - - - - - -
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through a
Window (10,000 lux)
Daylight Through a
Window on a Cloudy
Day (5,000 lux)
Indoor Fluorescent
Lighting (500 lux)
▲
▲
▲
Reference
This section contains more detailed and technical information about watch
operation. It also contains important precautions and notes about the various
features and functions of this watch.
Auto Return Features
•The watch automatically returns to the Timekeeping Mode if you do not
perform any button operation for two or three minutes in the Digital
Compass and Barometer/Thermometer Mode.
•The watch automatically returns to the Timekeeping Mode if a depth
measurement operation (indicated by ongoing elapsed time measurement
in the upper part of the display) in the Depth Gauge Mode continues for
more than three hours. If there is no depth measurement operation being
performed (indicated by (or 0) in the center part of the display and no
ongoing elapsed time measurement in the upper part of the display), the
watch automatically returns to the Timekeeping Mode if you do not perform
any button operation for about one hour in the Depth Gauge Mode.
•If you leave a screen with flashing digits on the display for two or three
minutes without performing any operation, the watch automatically exits the
setting screen.
Scrolling
The Band Ebuttons are used on the setting screen to scroll through data
on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Sensor Malfunction Indicator
Subjecting the watch to strong impact can cause its sensor to malfunction or
improper contact of internal circuitry. When this happens, the message Err
will appear on the display and sensor operations will be disabled.
•If Err appears during digital compass or barometric pressure
measurement, it will disappear from the display as soon as measurement is
successful again.
•During depth measurement, elapsed dive time measurement continues
even if Err is on the display. After you surface from your dive, hold down
Dfor about three seconds to exit the Depth Gauge Mode. The Err
message should no longer be on the display when you re-enter the Depth
Gauge Mode.
Barometric
Pressure
Measurement
DIgital
Compass
Measurement
Depth
Measurement
Depth Gauge
Digital Compass
Measurement
•If Err appears during Depth Gauge digital compass measurement, wait 5
or 6 seconds (or press B) to return to the Elapsed Measurement Time/
Current Depth screen. This should clear the Err message from the display.
•If the Err message keeps appearing during measurement, it could mean
there is a problem with the applicable sensor.
Whenever you have a sensor malfunction, be sure to take the watch to
your original dealer or nearest authorized CASIO distributor as soon as
possible.
Power Saving Function
When turned on, the Power Saving function automatically puts the watch into
a sleep state whenever it is left for a certain period in an area where it is dark.
The table below shows how watch functions are affected by the Power Saving
function.

Operation Guide 2825
8
•Wearing the watch inside the sleeve of clothing can cause it to enter the
sleep state.
•The watch will not enter the sleep state while the digital time is between
6:00 AM and 9:59 PM. If the watch is already in the sleep state when the
digital time reaches 6:00 AM, however, it will remain in the sleep state.
•The watch will not enter the sleep state while it is in the Digital Compass,
Barometer/Thermometer, Depth Gauge, Countdown Timer, or Stopwatch
Mode. When the watch is left in any mode besides the Countdown Timer
and Stopwatch Mode, the watch will return to the Timekeeping Mode
automatically after a specific amount of time. Then if left in the dark for the
elapsed time indicated in the table above, the watch will enter the sleep
state.
Elapsed Time in
Dark
60 to 70 minutes
6 or 7 days
Display
Blank, with
P. SAVE flashing
Blank, with
P. SAVE not
flashing
Operation
Display is off, but all functions are
enabled.
All functions are disabled, but
timekeeping is maintained.
To recover from the sleep state
Perform any one of the following operations.
•Move the watch to a well-lit area. It can take up to two seconds for the
display to turn on.
•Press any button.
•Angle the watch towards your face for reading.
To turn Power Saving on and off
1. In the Timekeeping Mode, hold down Auntil
the seconds start to flash, which indicates the
setting screen.
2. Press Dseven times until the Power Saving
on/off screen appears.
3. Press Eto toggle Power Saving on (ON) and
off (OFF).
4. Press A to exit the setting screen.
•The Power Saving on indicator (P. SAVE) is on
the display in all modes while the Power Saving
is turned on.
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Backlight Precautions
•The electro-luminescent panel that provides illumination loses power after
very long use.
•The illumination provided by the backlight may be hard to see when viewed
under direct sunlight.
•The backlight automatically turns off whenever an alarm sounds.
•The watch may emit an audible sound whenever the display is illuminated.
This is due to vibration of the EL panel used for illumination, and does not
indicate malfunction.
•Frequent use of the backlight runs down the battery.
•The backlight is disabled while the watch is taking a depth reading (every
three seconds).
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 the display. To avoid running down the battery, turn off
the auto light switch whenever engaging in activities that might cause
frequent illumination of the display.
•The backlight may not light if the face of the
watch is more than 15 degrees above or below
parallel. Make sure that the back of your hand
is parallel to the ground.
•The backlight turns off after the preset display
illumination duration (see “To specify the
illumination duration” ), even if you keep the
watch pointed towards your face.
•Static electricity or magnetic force can interfere with proper operation of the
auto light switch. If the backlight does not light, try moving the watch back to
the starting position (parallel with the ground) and then tilt it back toward
you again. If this does not work, drop your arm all the way down so it hangs
at your side, and then bring it back up again.
•Under certain conditions, the backlight may not light until about one second
after you turn the face of the watch towards you. This does not necessarily
indicate malfunction of the backlight.
•You may notice a very faint clicking sound coming from the watch when it is
shaken back and forth. This sound is caused by mechanical operation of
the auto light switch, and does not indicate a problem with the watch.
More than 15 degrees
too high
Digital Compass Precautions
This watch features a built-in magnetic bearing sensor that detects terrestrial
magnetism. This means that north indicated by this watch is magnetic north,
which is somewhat different from true polar north. The magnetic north pole is
located in northern Canada, while the magnetic south pole is in southern
Australia. Note that the difference between magnetic north and true north as
measured with all magnetic compasses tends to be greater as one gets closer
to either of the magnetic poles.You 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 magnetism
can cause large errors in readings. Because of this, you should avoid taking
direction readings while in the vicinity of the following types of objects:
permanent magnets (magnetic necklaces, etc.), concentrations of metal
(metal doors, lockers, etc.), high tension wires, aerial wires, household
appliances (TVs, personal computers, washing machines, freezers, etc.)
•Accurate direction readings are impossible while in a train, boat, air plane,
etc.
•Accurate readings are also impossible indoors, especially inside ferro-
concrete structures. This is because the metal framework of such structures
picks up magnetism from appliances, etc.
Storage
•The precision of the bearing sensor may deteriorate if the watch becomes
magnetized. Because of this, you should be sure to store the watch away
from magnets or any other sources of strong magnetism, including:
permanent magnets (magnetic necklaces, etc.) and household appliances
(TVs, personal computers, washing machines, freezers, etc.)
•Whenever you suspect that the watch may have become magnetized,
perform one of the calibration procedures under “Calibrating the Bearing
Sensor”.
Calibrating the Bearing Sensor
Whenever you suspect that direction readings produced by the watch are
wrong, you should calibrate it.You can use either one of two calibration
procedures:
bidirectional calibration or northerly calibration .
Use bidirectional calibration when you want to take readings within an area
exposed to magnetic force. This type of calibration should be used if the
watch becomes magnetized for any reason.
With northerly calibration, you “teach” the watch which way is north (which
you have to determine with another compass or some other means). You
could use this calibration procedure, for example, to set the watch to indicate
true north instead of magnetic north.
Important!
•If you want to perform both bidirectional and northerly calibration, be sure
to perform bidirectional calibration first, and then perform northerly
calibration. This is necessary because bidirectional calibration cancels any
previously set northerly calibration setting.
•The more correctly you perform bidirectional calibration, the better the
accuracy of the bearing sensor readouts.You should perform bidirectional
calibration whenever you change environments where you use the bearing
sensor, and whenever you feel that the bearing sensor is producing
incorrect readings.
Precautions about bidirectional calibration
•You can use any two opposing directions for bidirectional calibration. You
must, however, make sure that they are 180 degrees opposite each other.
Remember that if you perform the procedure incorrectly, you will get wrong
bearing sensor readings.
•Make sure that you do not move the watch while calibration of either
direction is in progress.
•You should perform bidirectional calibration in an environment that is the
same as that where you plan to be taking direction readings. If you plan to
take direction readings in an open field, for example, calibrate in an open
field.
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To perform bidirectional calibration
1. Enter the Digital Compass Mode.
2. Hold down Afor about one second until x1x
appears on the display, which indicates the
setting screen.
•At this time, the magnetic north pointer
flashes at the 12 o’clock position to indicate
that the watch is ready to calibrate the first
direction.
3. Place the watch on a level surface facing any direction you want, and
press Bto calibrate the first direction.
•xxx is shown on the display while calibration is being performed. OK
appears in the upper part of the display, x2x appears in the center part
of the display, and the magnetic north pointer flashes at the 6 o’clock
position when calibration of the first direction is complete. This means
that the watch is ready for calibration of the second direction.
4. Rotate the watch 180 degrees.
5. Press Bagain to calibrate the second direction.

Operation Guide 2825
9
•xxx is shown on the display while calibration is being performed. When
calibration is complete, OK appears in the upper part of the display and
then the Digital Compass Mode screen (showing the angle value) appears.
•If --- appears and then changes to ERR (error) on the calibration
screen, it means that there is something wrong with the sensor. The ERR
message will disappear after about one second. Try performing the
calibration operation again. If ERR keeps appearing, contact your original
dealer or nearest authorized CASIO distributor to have the watch checked.
To perform northerly calibration
1. While in the Digital Compass Mode, hold
down Afor about one second until x1x
appears on the display, which indicates the
setting screen.
2. Press Dto start the northerly calibration
procedure.
•At this time, -N- (north) appears on the
display.
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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 Bto start the calibration operation.
•--- is shown on the display while calibration is being performed. When
calibration is complete, OK appears in the upper part of the display and
then the Digital Compass Mode screen (with 0°indicated as the angle
value) appears.
•If --- appears and then changes to ERR (error) on the calibration
screen, it means that there is something wrong with the sensor. About one
second after the ERR message appears, -N- will reappear. Try
performing the calibration operation again. If ERR keeps appearing,
contact your original dealer or nearest authorized CASIO distributor to have
the watch checked.
Calibrating the Temperature Sensor
The temperature sensor of this watch is calibrated at the factory before
shipment, and further adjustment is normally not required. If you notice
serious errors in the temperature readings produced by the watch, you can
calibrate the sensor to correct the errors.
Important!
Incorrectly calibrating the temperature sensor can result in incorrect readings.
Carefully read the following before doing anything.
•Compare the readings produced by the watch with those of another reliable
and accurate thermometer.
•If adjustment is required, remove the watch from your wrist and wait for 20
or 30 minutes to give the temperature of the watch time to stabilize.
To calibrate the temperature sensor
1. Enter the Barometer/Thermometer Mode.
2. Hold down Afor about one second, until the
display goes blank.
3. Release A. After about three or four seconds,
either OFF or a temperature calibration
value (if one is set) will appear in the upper
part of the display. This is the setting screen.
4. Wait four or five seconds until either OFF or a barometric pressure
calibration value (if there is one set) appears in the center part of the display.
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5. After waiting four or five seconds, press E(+) or B(–) to change the
displayed temperature by 0.1°C (or 0.2°F).
•Pressing Eand Bat the same time returns to the factory calibration
(OFF).
6. Press Ato exit the setting screen.
Calibrating the Barometric Pressure Sensor
The pressure sensor of this watch is calibrated at the factory before shipment
and further adjustment is normally not required. If you notice serious errors in
the barometric pressure readings produced by the watch, you can calibrate
the sensor to correct the errors.
Important!
Incorrectly calibrating the barometric pressure sensor can result in incorrect
readings. Before performing the calibration procedure, compare the readings
produced by the watch with those of another reliable and accurate barometer.
To calibrate the pressure sensor
1. Enter the Barometer/Thermometer Mode.
2. Hold down Afor about one second, until the
display goes blank.
3. Release A. After about three or four seconds,
either OFF or a temperature calibration
value (if one is set) will appear in the upper
part of the display. This is the setting screen.
4. Wait four or five seconds until either OFF or a
barometric pressure calibration value (if there
is one set) appears in the center part of the
display.
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5. After waiting four or five seconds, press Dto
move the flashing to the pressure sensor
calibration setting.
•At this time, OFF or the barometric pressure
value should be flashing on the display.
6. Press E(+) or B(–) to change the displayed barometric pressure by 1
hPa (0.05 inHg).
•Pressing Eand Bat the same time returns to the factory calibration
(OFF).
7. Press Ato exit the setting screen.
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To manually reset the reference depth to 0 meters (feet)
In the Depth Gauge Mode, press Dand Eat
the same time.
Important!
•This resets the reference depth and causes the
displayed depth to change to 0 meters (feet).
•Never perform the above operation while
submerged.