24
Thus, your absolute pressure may read 28.62 inHg (969 mb) at an altitude of 1000
feet (305 m), but the relative pressure is 30.00 inHg (1016 mb).
The standard sea-level pressure is 29.92 in Hg (1013.2hpa). This is the average
sea-level pressure around the world. Relative pressure measurements greater than
29.92 inHg (1013.2hpa) are considered high pressure and relative pressure
measurements less than 29.92 inHg are considered low pressure.
To determine the relative pressure for your location, locate an official reporting
station near you (the internet is the best source for real time barometer conditions,
such as Weather.com or Wunderground.com), and set your weather station to match
the official reporting station.
4) Wind Gain Calibration
In the calibration mode, press the
SET
button twice and the wind speed value will
flash. The default is 1.00 (the display will show 100 but it is actually 1.00. There is no
provision for the decimal point).
Press the
C
or
MAX/MIN/-
button to adjust the wind speed calibration
factor from 0.75 to 1.25, where:
Calibrated Wind Speed = Calibration Factor x Measured Wind Speed
Press and hold the
C
or
MAX/MIN/-
button for three seconds to increase
or decrease rapidly.
Press the
ALARM
button to reset current value.
Note:
The wind gust is also affected by the wind speed calibration factor.
Note:
Wind speed and wind gust are adversely affected by installation
constraints. The rule of thumb is to install the weather station four times the distance
of the height of the tallest obstruction (for example, a 6 m house would require an
installation 24 m away).
In many instances, due to trees and other obstructions, this is not possible. The wind
speed calibration allows you to correct for these obstructions.
In addition to installation challenges, wind speed bearings (any moving part) wears
over time. To correct for wear, the correction value can be increased until the wind
cups must be replaced.
Without a calibrated source, wind speed is a difficult parameter to measure. We
recommend using a calibrated wind meter and constant, high speed fan.
5) Rain Calibration
In the calibration mode, press the
SET
button for 3 times, the Rain Calibration value
will begin flashing (the default is 1.0). Press the C or MAX/MIN/- button to
adjust the rain calibration factor from 0.75 to 1.25
Calibrated Rain = Calibration Factor x Measured Rain
Summary of Contents for WF-100C Lite
Page 32: ...31 3 When the registration is completed successfully will pop up the page below ...
Page 89: ...88 In Ihrem Posteingang sollten Sie nun eine entsprechende E Mail vorfinden ...
Page 95: ...94 Klicken Sie nun abschließend auf die mit Create bezeichnete Schaltfläche ...
Page 110: ...109 ...
