Checking Changes In Barometric Pressure Over Time; Checking The Change In Barometric Pressure Between Two Readings; Sudden Barometric Pressure Change Indications - Casio 5678 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 ( ) at the far right of the
v
graph indicates the latest barometric pressure
reading.
Barometric pressure
(1 hPa per division)
Time
(2 hours per division)
Predicting Upcoming Weather
●
A trend
Means 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.
Sudden Barometric Pressure
l
Change Indications
Watch Operation Guide 5678
Checking the Change in
Barometric Pressure
between Two Readings
When you perform the procedure below in the
Barometer Mode, the second hand indicates
the difference between the current barometric
pressure measurement and the last auto
measurement value (taken at two-hour
intervals).
1.
Enter the Barometer Mode.
Navigating Between Modes
l
2.
Press (D).
The second hand indicates the
barometric pressure differential (Pressure
Differential Indicator).
Example: Barometric pressure differential
of -3 hPa (approximately -0.9 inHg)
Unit: hPa
10
−10
Note
You can toggle between the two
●
second hand functions by pressing
(D).
Checking the Current Barometric
l
Pressure
The second hand points to [OVER] if
●
the current barometric pressure
differential is greater than +10 hPa (0.3
inHg), or [UNDER] if it is less than -10
hPa (-0.3 inHg).
A reading that is outside the allowable
●
measurement range of 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.
5
Range: ±10 hPa
0
(1 hPa units)
Pressure
Differential Indicator
−5
Sudden 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".
This
Means this:
indicator:
Sudden drop in pressure
Sudden rise in pressure
Sustained rise in pressure,
shifting to a fall
Sustained fall in pressure, shifting
to a rise
Important!
To ensure correct barometric pressure
●
change indicator operation, enable it 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 air pressure. Because of this, correct
readings are impossible. Do not take
readings while ascending or
descending a mountain, etc.
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