Operating manual EMGZ308
12
7.4 Configuring the lowpass filter
The measuring amplifier provides 2 lowpass filters per channel. They are used to
eliminate faulty signal variations which may be caused by unbalanced rollers, vibrations
of the machine, or equivalent.
Lowpass U
acts only to the tension output
Lowpass I
acts only to the current output
The lower the cut-off frequency, the more sluggish the signal will be. The configuration
is made by soldering a non-polarized capacitor to the respective soldering points (refer to
fig. 6). The capacitor will be determined referring to the following formula or table:
Cut-off frequency
[Hz]
Capacitor [
µ
F]
1
10
C = 10 / F
2
5
5
2
10
1
C: Capacity [
µ
F]
20
0.5
F: Cut-off frequency [Hz]
50
0.2
100
0.1
200
0.05
500
0.02
1000
0.01
Notice
You must not use electrolytic capacitors because positive and negative signals are
appearing! They would damage the electrolytic capacitor.
