Operation Guide 2894
3
• In some areas, barometric pressure is expressed in millibars (mb) instead
of hectopascals (hP
• Y
unit for the measured barometric pressure, and Celsius (°C) or F
(° F) as the displa“T
the temperature, barometric pressure”.
• See “Barometer and ” f
Barometric Pressure Graph
Barometric pressure indicates changes in the atmosphere.
these changes you can predict the weather with reasonab
This watch takes barometric pressure measurements automatically e
hours (at the top of each ev
mode.
and barometric pressure differential pointer readings.
The barometric pressure graph shows readings of pre
up to 30 hours.
standing for tw
recent reading.
with each dot standing for the relativ
of the dots next to it.
The follo
pressure graph.
A rising graph generally means impro
A falling g
Note that if there are sudden changes in weather or
temperature
off the top or bottom of the displa
become visible once barometric conditions stabilize
The f
measurement to be skipped, with the corresponding point on
the barometric pressure graph being left blank.
• Barometric reading that is out of range (260 hP
7.65 inHg to 32.45 inHg)
• Sensor malfunction
Not visible on
the display
Barometric Pressure Differential P
This pointer indicates the relative diff
barometric pressure reading indicated on the barometric pressure graph, and
the current barometric pressure value displa
Thermometer Mode
• Pressure differential is indicated in the r± 15 hPa, in 1-hP
• The barometric pressure differential pointer is not displa
display
range (260 to 1,100 hP
• Barometric pressure is calculated and displayed using hP
The barometric pressure differential can also be read in inHg units as
shown in the illustration.
Pressure differential
examples in the
illustration are indicated
in 10 hPa/0.3 inHg
steps.
Current pressure
less than most
recent measured
pressure
Points to 9 o'cloc
differentials outside
the range of ±15 hPa/
±0.44 inHg.
Current pressure
greater than most
recent measured
pressure
Barometric pressure
differential pointer
inHg values
hPa v
To turn display of the barometric pressure differential pointer on
and off
1. In the Barometer/Thermometer Mode, hold
down E until
SET
appears in the upper
display area.
2. Release E , and wait for f
seconds until either
OFF
or the current
reference temper
flash.
3. Press D twice to display the pointer on/off
setting screen.
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About Barometric and
• Barometric pressure and temperature measurement operations are
performed as soon as you enter the Barometer/Thermometer Mode.
that, barometric pressure and temperature measurements are taken e
five seconds
• The ACT indicator flashes on the displa
progress.
• Y
at any time bB in the Barometer/Thermometer Mode.
Altimeter
The watch's altimeter uses a pressure sensor to detect current air pressure
which is then used to estimate the current altitude based on ISA (International
Standard Atmosphere) preset values
altitude, which the watch will use to calculate y
the value y
measurement data in memory and an altitude alarm.
Important!
• This watch estimates altitude based on air pressure
altitude readings for the same location ma
• The semiconductor pressure sensor used by the watch f
measurements is also affected b
measurements, make sure the w
changes.
• T
keep the w
• Do not rely upon this watch f
operations while sky diving, hang gliding, or paragliding, while riding a
gyrocopter
activity where there is the chance of sudden altitude changes.
• Do not use this watch f
professional or industrial le
• Remember that the air inside of a commercial aircraft is pressurized.
Because of this, the readings produced b
altitude readings announced or indicated the flight crew
How the Altimeter Measures Altitude
The altimeter can measure altitude based on its own preset v
reference altitude specified b
When you measure altitude based on preset v
Data produced by the w
approximate altitude based on ISA (International Standard Atmosphere)
conv
When you measure altitude using a ref
After you specify a ref
current measured barometric pressure value to altitude
• T
example
altitude value while you are on the g
floor
altitude display
the height from the ground floor
you ma
the building is pressurized or air-conditioned.
• When mountain climbing, you can set the
reference v
along the wa
map
produced by the watch will be more accur
than they w
400
B
A
4. Press C to toggle displa
on (
ON
display
OFF
display
5. When the setting is the waE to exit the setting screen.
Displa
Y
altitude.
the display
altitude graph at the top of the displa
Important!
• The procedure in this section simply displays v
altitude, without storing them in watch memory
recording altitude readings in watch memory“ Saving Altitude Data”.
