Version 2.1
en MBI 46.31 operating instruction.docx
Issue date: 01/2022
Page 29 of 42
The required resistance values for the offset depend, among
other things, on the adjusted amplification of the measuring
amplifier. It is advisable that you use a resistance decade box to
dimension the resistors. Connect it to the soldering terminals of
the resistance to be determined
NOTICE
Determine the required resistance value R
6
or R
7
by reducing the decade
value step by step
– starting with 50 k
. When switching the decade box,
make sure that the resistor is not short-circuited. Failure to do so can
destroy the measuring amplifier.
•
Then select a suitable fixed resistor R6 or R7 (±5 %) and solder it to the
soldering terminals provided.
-10
-5
0
5
10
-50
0
50
Displacement in % FSO
O
u
tp
u
t
vo
lt
a
g
e
i
n
Vo
lt
Output signal without offset
using R7 to shift to the innner endposition
using R6 to shift to the outer endposition
using R6 to shift to the outer endposition and sw itch excitation voltage
-5 V ... +5 V
0 V ... +10 V
+10 V ... 0 V
-10 V ... 0 V
Figure 19
Different output ranges
5.4.4 Basic configuration of gain
The preamplifier, the fixed resistor R
E
and the trimming potentiometer P
E
determine the gain of the measuring amplifier. The fixed resistor and the
trimming potentiometer (default 50 k
) are connected in series. The fixed
resistor R
E
determines the minimum and maximum gain, as well as the
adjustment range of the trimming potentiometer (adjustment).
NOTICE
NOTE
