Version 2.1
en MBI 46.31 operating instruction.docx
Issue date: 01/2022
Page 32 of 42
5.5 Optimizing the linearity characteristic of the measuring chain
The procedure for basic settings and adjustment described in the previous
chapters applies to a measuring c
hain with an “ideal displacement sensor”
without linearity deviation.
Some real
displacement sensors show a distinctive “one-sided” linearity
deviation. In these cases, the linearity behavior of the measuring chain can be
further optimized taking into account the respective measuring task.
Figure 19 shows the typical linearity characteristic of a symmetric displacement
sensor, as determined following the setting of the measuring amplifier as per
the steps described above. The maximal linearity error in the measuring range
considered is 0,5 %. It is zero in the middle and at the end of the measuring
range.
Figure 21
Typical error curve of a displacement sensor, zero-error setting at
the zero point and at the end of the measuring range
-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
10 15 20 25 30 35 40 45 50
Displacement in %
L
in
e
a
ri
ty
e
rr
o
r
in
%
F
S
O
Graph 1
