HSP NTG-3000, Руководство по эксплуатации

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HSP GmbH Zum Handwerkerhof 2 90530 Wendelstein Tel. 09129 / 2852-0 Fax: 09129 / 2852-11 Web: www.hsshsp.de EMAIL: HSP@hsshsp.de
NTG-3000 Operating Instructions Version 2.11
Page 10 of 18
11 Measured value acquisition
11.1 Filtering of the analog inputs (U1–3 and I1–3)
The analog inputs (U1–3 and I1–3) are filtered by default. This filtering can be disabled via
the option byte (see NTG 3000 - Data protocol).
The implemented filter is a Chebyshev filter second degree and has the following coefficients:
a
0
= 0.134121405 a
1
= 0.268242810 a
2
= 0.134121405
b
1
= -0.740464862 b
2
= 0.276950483
+
+
+
a
0
a
1
a
2
Z
-1
Z
-1
x
Z
-1
Z
-1
y
-b
2
-b
1