Version 2.1
en MBI 46.31 operating instruction.docx
Issue date: 01/2022
Page 25 of 42
Other output ranges, e.g. 0...10 V, require a zero offset
according to chapter 5.4.3.
•
To
adjust the zero point
, remove the core from the sensor housing and set
the output signal of the measuring amplifier to
0 V
or
12 mA
using the zero-
point potentiometer P
0
. Reinsert the core into the displacement sensor and
secure the core to retain the output signal. Small corrections are permitted
when using the zero-point potentiometer after the mechanical adjustment.
If you cannot set the zero point as described above, then alternatively bring
the core into the position where the displacement sensor provides the same
value with the usual connection as well as with switched excitation wires
(ac 2 / terminal 16 and ac 4 / terminal 15).
•
To
adjust the phase
, move the core to a position just before the end of the
(nominal) measuring range. Then set the maximum of the output signal using
the phase potentiometer P
Ph
. If the output signal is no longer close to the
desired value, adjust the gain, if necessary.
•
To
adjust the gain
, move the core to the end of the (nominal) measuring
range and use the gain potentiometer P
E
to set the voltage to the desired
value (usually
10 V
or
20 mA
). Then check the setting at the start of the
nominal measuring range and correct slightly, if required.
5.3.2 Setting instruction for asymmetric displacement sensor (e.g. type
WP)
The electrical zero of asymmetric displacement sensors is typically at the start
of the nominal stroke. Usually measuring amplifiers for asymmetric
displacement sensors are set to provide an output signal of 0...10 V (or
4...20 mA) in the (nominal) measuring range of the displacement sensor.
•
To
adjust the zero point
, move the measuring tube of the displacement
sensor into the mechanical zero position (dimension “A”) according to the
data sheet. Then set the output signal of the measuring amplifier to
0 V
or
4 mA
using the zero-point potentiometer P
0
.
•
To
adjust the phase
, move the measuring tube to a position just before the
end of the (nominal) measuring range. Then set the maximum of the output
signal using the phase potentiometer P
Ph
. Adjust the gain, if necessary. Then
check and correct the zero-point adjustment, if necessary.
NOTE
