Weather Forecast And Weather Tendency; Weather Forecasting Icons - La Crosse Technology WS-9020U Instruction Manual

can set the thresholds for the outdoor temperature to +104°F (+40ºC)
(high) and +14ºF
(-10°C) (low), while only enabling the high alarm and disabling the low
alarm (i.e. temperatures < +14ºF (-10°C) won't trigger alarm, but
temperatures > +104ºF (+40°C) will).
Alarm setting
Outdoor Temperature
HYSTERESIS
To compensate for fluctuation of the measured data, which may cause
the weather alarm to sound constantly if the measured reading is close
to user set level, a hysteresis function has been implemented for each
weather alarm. For example, if the high temperature alarm is set to
+77°F (+25°C) and the current value moves to +77°F (+25°C), the alarm
will be activated (if it has been enabled). Now when the temperature
drops to +76.8°F (+24.9°C) or below and thereafter again increases to
beyond +78°F (+25°C), the data will be blinking, but no alarm will be
activated. It has to drop to below +75.2°F (+24°C) (with a pre-set
hysteresis of 2ºF (1°C)) so that the alarm can be produced again.
Hysteresis values for the various weather data types are given in the
following table:
Weather data
Temperature
Humidity
Air pressure

WEATHER FORECAST AND WEATHER TENDENCY:

WEATHER FORECASTING ICONS:

There are 4 weather icons in the fourth section of LCD which can be
displayed in any of the following combinations:
Minimum
-40°F (40ºC)
Hysteresis
2°F
3% RH
0.03 inHg
22
Maximum
+139.8°F (59.9ºC)