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pressure (in LCD 5) to evaluate what past air pressures have been.
Air pressure trends can be determined by simply glancing at the bar
graph. If the bars are rising (higher on the right than the left) then the
air pressure has a rising trend, and the weather should improve. If the
bars are dropping (lower on the right than the left) then the air pressure
has a falling trend, and the weather should worsen.
A. RAINFALL HISTORY
The bar graph will also display the rainfall history; this mode is
indicated by the appearance of the word “RAIN” at the top-central
position of LCD 4 (see programming mode).
The horizontal axis measures the past time periods, with “0”
representing the current day, and “7” representing 7 days ago. The
graph reads from right to left.
The vertical axis measures the rainfall in either preferred increments of
inches or millimeters. The normal (default) measurement scale is: in
millimeters {0, 1, 3, 5, 10, 30, 50, 100}; in inches {0, 0.1, 0.3, 0.5, 1, 2,
3, 5, 10} . If rainfall exceeds 7 inches (178mm) the measurement scale
automatically changes to: in inches {0, 1, 3, 5, 10, 20, 30, 50, 100}; in
millimeters {0, 10, 30, 50, 100, 300, 500, 1000}.
V. RAINFALL QUANTITY
The rainfall quantities can be displayed 3 different ways, represented by
3 different time period icons, and measured in 2 different units of
measure (inches or millimeters). The quantities are displayed in the
lower portion of LCD 5, and the time period icons appear between the
quantity and the bar graph. Following is a list of the 3 time period icons
and a description of what they represent.
a blank screen—(the default setting) shows the total accumulated rainfall
since the last set-up or manual reset.
“1h”—shows the rainfall measurement of the past hour. Information is
updated every hour on the half-hour (i.e. …at 6:30, at 7:30 and at
8:30…).
“rain icon”—resets automatically at the beginning of a rainfall, it will
show and keep track of the current rainfall quantities, once the current
rainfall is complete it will display the quantity of that rainfall until a new
rain begins, then it will automatically reset.