La-crosse-technology WS-2317 Manual do Utilizador descarregar pdf (Página 34)

Rainfall 1h 0.0 inch 39.37 inch

Wind 0.0 mph 111.8 mph

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 and the current value

moves to +78°F, the alarm will be activated (if it has

been enabled). Now when the temperature drops to

+76°F or below and thereafter again increases to

beyond +77°F, the data will be blinking, but no alarm

will be activated. It has to drop to below +75.2°F (with a

pre-set hysteresis of 1.8°F) so that the alarm can be

produced again. Hysteresis values for the various

weather data types are given in the following table:

Weather data Hysteresis

Temperature 1.8°F

Humidity 3% RH

Air pressure 0.0295 inHg

Rainfall 24h 0.1968 inch

Rainfall 1h 0.01968 inch

Wind 3.1 mph

16. Auto memory for stored values

The base station has a memory back up system, which is

used to memorize user-defined settings for when the batteries

are changed or if a power failure occurs. User defined units

are automatically updated each time these are changed. The

base station will memorize the following user defined units:

• Time zone

• 12/24h time display mode

• Unit settings (temperature, pressure, rainfall, wind)

• Air pressure offset for calculation of relative air pressure

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La-crosse-technology WS-2317 Manual do Utilizador Página 34