La Crosse Technology WT-5432 - Manual (Page 11)

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D. Forecast Icon
1. The weather forecasting feature is estimated to be 75% accurate. The
weather forecast is based solely upon the change of air pressure over time
2. The WT-5432 averages past air-pressure readings to provide an accurate
forecast—creating a necessity to disregard all weather forecasting for 12-24
hours after the unit has been set-up, reset, or moved from one altitude to
another (i.e. from one floor of a building to another floor). In areas where
the weather is not affected by the change of air pressure, this feature will be
less accurate.
3. Weather Icons
There are 3 possible weather icons that will be displayed in the FORECAST
LCD:
Sunny—indicates that the weather is expected to improve (not that the
weather will be sunny).
Sun with Clouds—indicates that the weather is expected to be fair (not
that the weather will be sunny with clouds).
Clouds with Rain—indicates that the weather is expected to get worse
(not that the weather will be rainy).
The weather icons change when the unit detects a change in air
pressure. The icons change in order, from “sunny” to “partly sunny” to
“cloudy” or the reverse. It will not change from “sunny” directly to
“rainy”, although it is possible for the change to occur quickly. If the
symbols do not change then the weather has not changed, or the change
has been slow and gradual.
E. EL Backlight
1. The projection alarm has an EL backlight designed for night viewing. This
will light up for 2 seconds whenever a button is pressed.
2. The EL backlight cannot be turned on constantly as this would drain the
batteries and burn out the EL light.