Owner's manual

8644/phoenix - 109
SYSTEM DESCRIPTION
Sensitivity (degree of smoothing)
The diagram shows the step responses (from 1 to 0 / from 0 to 1) of the filter with various sensitivity
parameters (degrees of smoothing).
Explanation of the characteristic curves
The sensitivity parameter is the procentual weighting of the last measured pressure value.
Example:
Sensitivity parameter = 90 (see also 90 % characteristic)
The desired mean pressure value is calculated from the formula:
P
A
(k) = 0.1 P
A
(k-1) + 0.9 P
E
(k) or P
A
(k) = 10% P
A
(k-1) + 90% P
E
(k)
P
A
(k) is the mean pressure value to be calculated (filter output)
P
A
(k-1) is the last calculated mean pressure value (filter output) and
P
E
(k) is the previously measured pressure (filter input).
Sensitivity Explanation
parameter
10 Corresponds to the 10 % characteristic: filter is sluggish, very strong smoothing
P
A
(k) = 90 % P
A
(k-1) + 10 % P
E
(k)
50 Corresponds to the 50 % characteristic: strong smoothing
P
A
(k) = 50 % P
A
(k-1) + 50 % P
E
(k)
100 Corresponds to the 100 % characteristic: no smoothing
P
A
(k) = 0 % P
A
(k-1) + 100 % P
E
(k)
100%
1
0,8
0,6
0,4
0,2
0
h(0)
h(1)
h(2)
h(3)
h(4)
h(5)
h(6)
h(7)
h(8)
h(9)
h(10)
h(11)
h(12)
h(13)
h(14)
h(15)
h(16)
h(17)
h(18)
h(19)
h(20)
h(21)
h(22)
h(23)
h(24)
h(25)
h(26)
h(27)
h(28)
h(29)
90%
80%
70%
60%
50%
40%
30%
20%
10%
50%
60%
100%
90%
80%
70%
40%
30%
20%
10%
10% 20% 50% 60% 70% 80% 90%30% 40%100%