Operating Instructions MBI 46.51.39
Version 0.9
en MBI 46.51.39 operating instructions.docx
Issue: 08/2022
page 22 from 29
5.7 Optimization of the linearity behavior
The procedure for the basic settings and the adjustments described in the previous chapters
apply to a measuring with an "ideal displacement transducer" without linearity deviation.
However, real displacement transducers have a linearity deviation. In these cases, the linearity
behavior of the transducer can be further optimized taking into account the respective
measuring task.
Figure 13 shows the typical linearity curve of a symmetrical displacement transducer, as
determined after setting the amplifier according to the steps described above. The maximum
linearity error in the measuring range under consideration is 0.5%. It is zero in the middle and
at the end of the measuring range.
Figure 13
Typical error curve of a displacement transducer, without optimization
5.7.1 Optimization with the lowest error at zero point
If the measuring task mainly requires the lowest possible error in the zero point of the
displacement transducer, the maximum deviation in the measuring range can also be reduced.
•
To do this, adjust the gain in small steps. This causes a "rotation" of the illustrated linearity
curve around the zero point; the zero-defect setting at the end of the measuring range is
displayed.
-0,4
-0,3
-0,2
-0,1
0
0,1
0,2
0,3
0,4
0,5
0,6
-50 -45 -40 -35 -30 -25 -20 -15 -10
-5
0
5
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50
Line
a
ri
tä
ts
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hle
r
in %
v
om
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nd
w
e
rt
Messweg in %
Kurve 1
