Checking Changes In Barometric Pressure Over Time; Checking The Change In Barometric Pressure Between Two Readings; Barometric Pressure Change Indications - Casio 5470 Operation Manual

Checking Changes in
Barometric Pressure Over
Time
The watch displays a graph of 20 hours of
barometric pressure readings taken every two
hours. The square (v) at the far right of the
graph indicates the latest barometric pressure
reading.
Barometric
pressure
(1 hPa per division)
Time
(2 hours per division)
Predicting Upcoming Weather
●
A trend
Indicates this:
like this:
Rising barometric pressure,
which indicates that upcoming
weather probably will be fair.
Falling barometric pressure,
which indicates that upcoming
weather probably will be bad.
Note
Large changes in barometric
●
pressure and/or temperature can
cause past data readings to be
plotted outside of the visible area of
the graph. Though plots are not
visible, the data is still maintained in
watch memory.
The barometric pressure graph is
●
not displayed while Barometric
Pressure Change Indications are
displayed.
Barometric Pressure Change
l
Indications
Operation Guide 5470
Checking the Change in
Barometric Pressure
between Two Readings
When you perform the procedure below in the
Barometer Mode, the second hand will
indicate the difference between the current
barometric pressure measurement and the
last auto measurement value (taken at two-
hour intervals).
1.
Press (D).
The second hand will indicate the
barometric pressure differential (Pressure
Differential Indicator).
Example: Barometric pressure differential
of -3 hPa (approximately -0.9 inHg）
Unit: hPa
10 5
−10 −5
2.
To exit barometric pressure differential
indication, press (D).
Each press of (D) toggles the second
●
hand between barometric pressure
differential and current time seconds
indication.
Note
The second hand will point to r
●
(over) if the current barometric
pressure differential is greater than
+10 hPa (0.3 inHg), or s (under) if it
is less than -10 hPa (-0.3 inHg).
A reading that is outside the
●
allowable measurement range (260
hPa to 1,100 hPa (7.65 inHg to 32.45
inHg)) or any measurement error will
cause the second hand to move to 9
o'clock.
Barometric Pressure Change
Indications
Whenever the watch detects a significant
change in air pressure readings (due to
sudden ascent or descent, or to the passage
of a low pressure or high pressure area), it will
beep to let you know. An arrow will also flash
on the display at this time if the watch is in the
Barometer Mode, or if it is in the Timekeeping
Mode with the barometric pressure graph
displayed. The arrow that appears shows the
direction of the pressure change. These alerts
are called "Barometric Pressure Change
Indications".
indicator:
Range: ±10 hPa
0
(1 hPa units)
Pressure
Differential
Important!
Indicator
1.
2.
This
Means this:
Sudden drop in barometric
pressure
Sudden rise in barometric
pressure
Sustained rise in pressure,
shifting to a fall
Sustained fall in pressure, shifting
to a rise
To ensure correct barometric
●
pressure indication operation, turn it
on in a location where the altitude is
constant (such as a lodge, camp
area, or on the ocean).
A change in altitude causes a
●
change in barometric pressure.
Because of this, correct readings are
impossible. Do not take readings
while ascending or descending a
mountain, etc.
Hold down the (D) button for about two
seconds.
[BARO] is displayed while Barometric
Pressure Change Indications are on.
Hold down the (D) button for about two
seconds to turn off Barometric Pressure
Change Indications.
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