Version 2.1
en MBI 46.31 operating instruction.docx
Issue date: 01/2022
Page 8 of 42
Measurement
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, 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.
Rated output
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 displacement sensor data sheets, t
he term “nominal
output” is used.
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 46.3x 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).
