Altitude Reading Precautions; Barometric Pressure Measurement; Checking The Current Barometric Pressure - Casio 5470 Operation Manual

Altitude Reading
Precautions
Effects of Temperature
When taking altitude readings, take the steps
below to keep the watch at as stable a
temperature as possible. Changes in
temperature can affect temperature readings.
Take readings with the watch on your wrist.
●
Take readings in an area where
●
temperature is stable.
Altitude Readings
Do not use this watch while skydiving, hang
●
gliding, paragliding, gyrocopter flying, glider
flying, or engaged in other activities where
altitude changes suddenly.
Altitude readings produced by this watch
●
are not intended for special-purpose or
industrial level use.
In an aircraft, the watch measures the in-
●
cabin pressurized air pressure, so readings
will not match altitudes announced by the
crew.
Altitude Readings (Relative Altitude)
This watch uses International Standard
Atmosphere (ISA) relative altitude data
defined by the International Civil Aviation
Organization (ICAO). Barometric pressure
generally becomes lower as altitude
increases.
Correct measurement may not be possible
under the conditions below.
During unstable atmospheric conditions
●
During sudden temperature changes
●
After the watch has been subjected to
●
strong impact
Operation Guide 5470
Barometric Pressure
Measurement
You can use the Barometer Mode to take a
reading of the barometric pressure at your
current location, and to track reading changes
and trends.
Important!
Check the information below to find
●
out how to ensure correct readings.
Barometric Pressure Reading
l
Precautions
Getting ready
Enter the Barometer Mode.
Navigating Between Modes
l
Barometer Mode
Entering the Barometer Mode starts
●
barometric pressure readings.
Note
When you enter the Barometer
●
Mode, the second hand will indicate
either timekeeping seconds, or the
differential between barometer
measurements (whichever was
indicated the last time you were in
the Barometer Mode). You can
toggle the second hand indication
between seconds and the measured
value differential by pressing (D).
Checking the Change in Barometric
l
Pressure between Two Readings
Checking the Current
Barometric Pressure
Entering the Barometer Mode displays the
current barometric pressure and a barometric
pressure graph. After you enter the Barometer
Mode, the watch takes readings about every
five seconds for three minutes. After that, a
measurement is taken about every two
minutes.
Barometric pressure
Barometric pressure graph
Note
To retrigger measurement, press
●
(A).
The watch will automatically return
●
to the Timekeeping Mode from the
Barometer mode if you do not
perform any operation for about one
hour.
The measurement range is 260 hPa
●
to 1,100 hPA (7.65 inHg to 32.45
inHg) (1 hPa (0.05 inHg) units). [- - -]
will appear for the measured value if
it is outside the allowable range.
To return to the Timekeeping Mode,
●
hold down the (B) button for about
two seconds.
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