Floating Average; Maximum Difference; Rainfall Measured Value Compensation - La Crosse Technology WS-2010 Software Manual

Automatic scaling can be selected for graphical representations for all sensor
types.

Floating average

A filter function is available with which to even out brief fluctuations in the meas-
ured values or exceptional measured values in the graphics representing the
temperature/humidity and air pressure diagrams. In this case, a definable number
of measured values is used to establish a floating average.
If, for example, a floating average of 10 is entered in the input field provided, a
measured value is formed from the average of the current measurement plus the
10 previous and 10 following measured values. Thus, the average value is de-
termined from 21 measured values.
The diagram on Page 28 illustrates the same temperature/humidity progression
without a floating average and with a floating average of 20.
The original measure values are not changed by the evening out and the evened
out signal sequence is not stored.

Maximum difference

This input field is available for the temperature/humidity sensors, air pressure
sensor and rainfall sensor. It is used to define the maximum permissible differ-
ence between two measured value transmissions, in which case larger differ-
ences are rejected .
Rainfall measured value transmitter compensation
The rainfall measuring system leaves the factory in an accurate condition, so
that adjustment is not normally necessary and the calibration factor already set
can be used. Compensation is only necessary in the cases where extreme accu-
racy is required for professional purposes.
Before compensating the rainfall measured value transmitter, the accumulated
rainfall total shown in the weather display must be reset to zero.
Then pour exactly one liter of water very slowly into the funnel of the rainfall
measuring transmitter, within any period.
Caution! Pouring too quickly falsifies the measuring results. Pour the wa-
ter so slowly that no water remains in the funnel at any time.
2
Since the diameter of the funnel is 5,118 in, i.e. has a surface area of 20,57 in
the setpoint value of 1 quart (U.S.) water poured in must produce a rainfall total
of 2,81 in.
After all the water has funneled through, wait approx. 10 minutes and then read
out the PC interface. After calling in the weather display, the actual value ap-
pears and should read 2,81 in.
The ratio of setpoint value to actual value defines the calibration factor. However,
since a calibration factor has already been entered earlier, or the predefined
value of 22.6 cu in per collector movement exists, this must be taken into account
in the calculation.
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