Operation Guide 2782
2
Setting the Analog Time
Perform the procedure below when the time indicated by the analog hands
does not match the time of the digital display.
To adjust the analog time
1. In the Timekeeping Mode, press
C
five times
to enter the Hand Setting Mode.
2. Hold down
A
until the current digital time
starts to flash, which indicates the analog time
setting screen.
3. Press
D
to advance the analog time setting
by 20 seconds.
•
Holding down
D
advances the analog time setting at high speed.
•
If you need to advance the analog time setting a long way, hold down
D
until the time starts advancing at high speed, and then press
B
.
This locks the high-speed hand movement, so you can release the two
buttons. High-speed hand movement continues until you press any
button. It will also stop automatically after the time advances 12 hours
or if an alarm starts to sound.
4. Press
A
to exit the setting screen.
•
To return to the Timekeeping Mode, press
C
.
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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
B
in the the Timekeeping Mode or in the Altimeter Mode enters the
Barometer/Thermometer Mode and automatically starts taking barometric
pressure and temperature measurements.
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▲
▲
Press
B
to
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
xx
.
x
°
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.
•
Some countries refer to the barometric pressure unit hecto-pascal (hPa) as
millibars (mb). It really makes no difference, because 1hPa = 1mb.
•
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 always uses hPa. This means that the
points plotted on the history graph are based on
±
3hPa changes in
barometric pressure.
•
No point is plotted on the graph whenever a measurement operation fails
due to sensor malfunction, low battery power, or any other reason.
Relatively steady (within
±
3hPa)
Rising (rise greater than 3hPa)
Falling (fall greater than 3hPa)
•
Barometric pressure measurement is disabled whenever you are
performing depth measurement in the Depth Gauge Mode. Because of this,
the graph plots of barometric pressure measurement operations that occur
during a depth measurement are skipped.
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.
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 above
BARO
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
B
in 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.
•
You can select either hectopascals (hPa) or inchesHg (inHg) as the display
unit for the measured barometric pressure. See “Changing the Barometric
Pressure and Temperature Units” for details.
•
You can select either Celsius (
°
C) or Fahrenheit (
°
F) as the display unit for
the measured temperature value. See “Changing the Barometric Pressure
and Temperature Units” for details.
Altimeter
A built-in altimeter uses a pressure sensor to detect the current air pressure,
which is then used to estimate the current altitude. The watch is pre-
programmed with ISA (International Standard Atmosphere) preset values,
which are used to convert air pressure readings to altitude values. If you
preset a reference altitude, the watch will also calculate the current relative
altitude based on your preset value.
Important!
•
This watch estimates altitude based on air pressure. This means that
altitude readings for the same location may vary if air pressure changes.
•
This watch employs a semiconductor pressure sensor, which is affected by
temperature changes. Make sure that the watch is not being exposed to
temperature changes while you are taking altitude measurements.
•
To avoid the effect of sudden temperature changes on measurement, wear
the watch so it is in direct contact with your wrist during measurement.
•
Do not rely upon this watch for altitude measurements or perform button
operations while engaging in sports where there are sudden altitude
changes, while sky diving, hang gliding, or paragliding, or while riding a
gyrocopter, glider, or any other aircraft.
•
Remember that the air inside of a commercial aircraft is pressurized.
Because of this, the readings produced by this watch will not match the
altitude readings announced or indicated by the flight crew.
How the Altimeter Works
With the Preset Values (No Reference Altitude)
•
The watch measures the air pressure at your current location and uses the
built-in ISA values to convert it to the equivalent altitude.
With a Reference Altitude
•
If you set a reference altitude, the watch
uses that value when calculating altitude
based on air pressure.
•
To determine the height of a tall building,
set the reference altitude to 0 on the
ground floor. Note, however, that you may
not be able to get a good reading if the
building is pressurized or air-conditioned.
•
When mountain climbing, you can set the
reference value in accordance with a
marker along the way or altitude
information from a map. After you do this,
the altitude readings produced by the
watch will be more accurate than they
would without a reference altitude.
400
B
A
