Messotron MBI 46.51.39 Series, Operating Instructions Manual

Page: 7 / 29

Operating Instructions MBI 46.51.39
Version 0.9 en MBI 46.51.39 operating instructions.docx
Issue: 08/2022 page 7 from 29
Term Definition
Measuring voltage Output signal proportional to the displacement (AC voltage in the mV
range) provided by the inductive displacement sensor.
Zero-point At the electrical zero-point, the output signal of the displacement sensor
is zero. Refer to the data sheet of the displacement sensor for physical
position of the zero-point
, see “measurement A”.
Rated output
(FSO)
The rated output of the sensor is defined as the ratio of the sensor
output voltage (measurement voltage) to the sensor input voltage
(excitation voltage) at the end of the nominal stroke. For calibrated
displacement sensors the rated output is e.g. 80 mV/V, independent of
the nominal stroke of the displacement sensor.
In older data sheets, the term “nominal output” may be used as well as
full scale output (FSO).
Sensitivity The sensitivity is defined as the ratio of the measurement voltage to the
excitation voltage per mm of displacement (e.g. 10 mV/V/mm).
For standardization purposes information on sensitivity and rated output
for MESSOTRON displacement sensors is determined and provided
independent of phase (i.e. without consideration of a phase shift).
Phase (phase shift) With inductive sensors and/or long connecting cables, there will be a
noticeable phase shift between the excitation voltage and the
measurement voltage. This phase shift lowers the (effective) sensitivity
of the sensor in the measuring chain.
All MESSOTRON series MBI 46.13 measuring amplifiers can
compensate a phase shift.
Linearity error The linearity error of measuring devices is the maximum deviation
between the nominal characteristic (straight line) and the real
characteristic of the measuring device. The error information is
referenced to the total measuring range (FSO / Full Scale Output).
Nominal output
range The nominal output range of the measuring amplifier indicates the range
covered by the output signal, if the displacement sensor operates in the
(nominal) measuring range.
Voltage output Analog voltage output of the measuring amplifier:
•
typically ±10 V for symmetric displacement sensors
•
typically 0-10V for asymmetric displacement sensors