La-crosse-technology WS-2317 Uživatelský manuál Strana 34
- Strana / 43
- Tabulka s obsahem
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
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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