11
HSI-HV
Frequency
additional error with activated
Butterworth fi lter
additional error with activated
Bessel fi lter
f/f
0
% of reading
% of reading
<0.1
0
0
0.01
0.00
0.00
0.02
0.00
0.02
0.03
0.00
0.04
0.05
0.00
0.11
0.1
0.01
0.47
0.2
0.14
1.9
0.3
0.73
4.3
0.5
5.24
12
0.75
20.34
25
1
40.45
40.45
Filter
The module has 9 selectable low pass filters from 100 Hz to 1 MHz. The filter characteristic could be chosen
between Butterworth 2
nd
order or Bessel 2
nd
order. The highest filter is a 3
rd
order filter with a guaranteed
-3 dB bandwidth of 2 MHz. This filter structure is the same for all HSI modules.
Typical filter transfer function:
AC accuracy with activated filter
With activated hardware filter an additional % of reading error has to be considered due to the damping of
the filter. This error depends on the signal frequency
f
and the selected filer frequency
f0
.
450134 • DAQP/H
SI
/PAD Modules • Technical Reference Manual • Prin
t
ing version 2.3.4 • November 18, 2020
Summary of Contents for HSI-HV
Page 14: ...C2 Notes...
