Air Pressure History (Bar Graph) - La Crosse Technology Weather Station Instruction Manual

Note: The MIN or MAX data needs to be reset individually.
WEATHER FORECAST AND WEATHER TENDENCY:
WEATHER FORECASTING ICONS:
Weather icons in the third section of LCD can be displayed in any of the
following combinations:
FORECAST FORECAST
Sunny Cloudy with sunny intervals
For every sudden or significant change in the air pressure, the weather
icons will update accordingly to represent the change in weather. If the
icons do not change, then it means either the air pressure has not
changed or the change has been too slow for the Weather station to
register. If the icon displayed is a sun or raining cloud, there will be no
change of icon if the weather gets any better (with sunny icon) or worse
(with rainy icon), since the icons are already at their extremes.
If the Weather station is moved to another location significantly higher or
lower than its initial standing point (for example from the ground floor to
the upper floors of a house), discard the weather forecast for the next 48-
60 hours. By doing this, the Weather Station will not mistake the new
location as being a possible change in air-pressure when really it is due
to the slight change of altitude.
WEATHER TENDENCY INDICATOR
Working together with the weather icons are the weather tendency
indicators (located on the left and right sides of the weather icons). When
the indicator points upwards, it means that the air-pressure is increasing
and the weather is expected to improve. When the indicator points
downwards, the air-pressure is dropping and the weather is expected to
become worse.
Taking this into account, one can see how the weather has changed and
is expected to change. For example, if the indicator is pointing
downwards together with cloud and sun icons, then the last noticeable
change in the weather was when it was sunny (the sun icon only).
Therefore, the next change in the weather will be cloud with rain icons
since the indicator is pointing downwards.
FORECAST
Rainy
33
35
The icons displayed forecast the weather in terms of getting better or
worse and not necessarily sunny or rainy as each icon indicates. For
example, if the current weather is cloudy and the rainy icon is displayed, it
does not mean that the product is faulty because it is not raining. It simply
means that the air pressure has dropped and the weather is expected to
get worse but not necessarily rainy.
Note:
After setting up, readings for weather forecasts should be disregarded for
the next 48-60 hours. This will allow sufficient time for the Weather station
to collect air pressure data at a constant altitude and therefore result in a
more accurate forecast.
Common to weather forecasting, absolute accuracy cannot be
guaranteed. The weather forecasting feature is estimated to have an
accuracy level of about 75% due to the varying areas the Weather station
has been designed for use in. In areas that experience sudden changes
in weather (for example from sunny to rain), the Weather station will be
more accurate compared to use in areas where the weather is constant
most of the time (for example mostly sunny).
Note:
Once the weather tendency indicator has registered a change in air
pressure, it will remain permanently displayed on the LCD.
AIR PRESSURE HISTORY (ELECTRONIC BAROMETER WITH
BAROMETRIC PRESSURE TREND)
The third section of the LCD also shows the relative air pressure value
and the air pressure history.
The bar chart indicates the air pressure history trend over the last 24
hours in 7 steps, 0h, -3h, -6h, -9h, -12h, -18h, and -24h. The "0h"
represents the current full hour air pressure recording. The columns
represent the "hPa" (0, ±2, ±4, ±6) at specific time. The "0" in the middle
of this scale is equal to the current pressure and each change (±2, ±4, ±6)
34
Air pressure over the last 24 hours
36