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Operation Guide 3148
5
Barometric Pressure Graph
Barometric pressure indicates changes in the atmosphere. By monitoring
these changes you can predict the weather with reasonable accuracy.
This watch takes barometric pressure measurements automatically every two
hours (at the top of each even-numbered hour), regardless of its current
mode. Measurement results are used to produce barometric pressure graph
and barometric pressure change indicator readings.
The barometric pressure graph shows readings of previous measurements for
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 1hPa.
The following shows how to interpret the data that appears on the barometric
pressure graph.
A rising graph generally means improving weather.
A falling graph generally means deteriorating weather.
Note that if there are sudden changes in weather or
temperature, the graph line of past measurements may run
off the top or bottom of the display. The entire graph will
become visible once barometric conditions stabilize.
The following conditions cause the barometric pressure
measurement to be skipped, with the corresponding point on
the barometric pressure graph being left blank.
• Barometric reading that is out of range (260 hPa/mb to 1,100 hPa/mb or
7.65 inHg to 32.45 inHg)
• Sensor malfunction
Not visible on
the display.
Barometric Pressure Change Indicator
l
l
l
l
l
l
l
l
l
A
▲
▲
A
Barometric pressure graph
Barometric pressure
change indicator
In the Barometer/Thermometer Mode, press the A button to toggle between
the barometric pressure graph and the barometric pressure change indicator.
This indicator (
) 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.
• Pressure differential is indicated in the range of ±4 hPa, in 1-hPa units.
• The barometric pressure change indicator (
) is not displayed when the
displayed current barometric value is outside of the allowable measurement
range (260 to 1,100 hPa).
• Barometric pressure is calculated and displayed using hPa as the standard.
The barometric pressure differential also can be read in inHg units as
shown in the illustration.
or
More than +4hPa
+3hPa
+2hPa
+1hPa
±0hPa
–1hPa
–2hPa
–3hPa
Less than –4hPa
Barometric pressure
change indicator
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.
• During barometric pressure measurements, the watch may not be able to
update its timekeeping display contents normally. Correct timekeeping is
maintained internally, however.
World Time
World Time displays the current time in 33 cities
(29 time zones) around the world.
• If the current time shown for a city is wrong,
check your Home City time settings and make
the necessary changes.
• For full information on city codes, see the “City
Code Table”.
• All of the operations in this section are
performed in the World Time Mode, which you
enter by pressing D.
To view the time in another city
In the World Time Mode, use E (east) and B
(west) to scroll through city codes (time zones).
• When the currently selected time zone is one
that includes mostly ocean, a value indicating
the zone’s UTC offset appears in place of a city
code.
Timekeeping
Mode time
Current time in the zone
of the selected city code
City code
To toggle a city code time between Standard Time and Daylight
Saving Time
1. In the World Time Mode, use E (east) and B
(west) to display the city code (time zone)
whose Standard Time/Daylight Saving Time
setting you want to change.
2. Hold down A to toggle between Daylight
Saving Time (DST indicator displayed) and
Standard Time (DST indicator not displayed).
• The DST indicator appears on the display
whenever you display a city code for which
Daylight Saving Time is turned on.
• You cannot toggle between Daylight Saving Time and Standard Time if the
displayed city code is
UTC(UTC offset: 0).
• Note that the DST/Standard Time setting affects only the currently
displayed city code. Other city codes are not affected.
DST indicator
Stopwatch
The stopwatch lets you measure elapsed time,
split times, and two finishes.
• The Stopwatch Mode is independent of the
Altimeter Mode stopwatch.
• 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.
Minutes
Current time
1/100
second
Hours
Seconds
J
J
J
JJ
JJ J
JJ J
First runner
finishes.
Display time
of first runner.
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
Two Finishes
EB E B B
Start Split Stop Split release Clear
To measure times with the stopwatch
Display time of
second runner.
Second runner
finishes.
(SPL displayed)