Dewetron PUREC, Technical Reference Manual

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450182 • PU[REC] • Technical Reference Manual • Printing version 1.0.0 • November 2
nd
, 2020
MAIN SYSTEM
LVDT via
MSI2-LVDT
Transducer type LVDT with 5 or 6 electrical connections (wires)
Sensor connection Soldering
Excitation voltage 3 V
RMS
Excitation frequency 2.5 kHz, 5 kHz, 18 kHz selectable by jumper (H, M, L; ± 5 %)
Output at stroke ends 280 mV/V to 1666 mV/V at full scale (+/-5 V), adjustable by gain-potentiometer
Functional description
The MSI2-LVDT is a high reliability conditioner for measurement of displacement with an LVDT (Linear Variable
Differential Transformer). It can be used with 5- or 6-wire transducers.
The MSI2-LVDT provides the sine wave sensor excitation and converts the sensor output into a linear voltage output.
With the gain potentiometer the MSI2-LVDT can be adjusted to a measuring range from 280 mV/V to 1666 mV/V. This
allows a rough adjustment to the sensor. The best way is to bring the sensor to the end position and adjust the output
to about 4.5 V. The exact adjustment of the sensor should be done by two point scaling in the software.
Thereby the MSI2-LVDT sensitivity is equivalent to 5 V/stroke end length (in mm or inch) [V/mm(inch)].
Once that is done apply the strain relief brackets and close the MSI.
Sensor connector
Soldering pins (sensor connection)
DO NOT JUMPER THESE PINS!
EXC1
EXC2
REF
VA
VB
Jumper for excitation frequency
(H, M, L)
H = 18 kHz
M = 5 kHz
L = 2.5 kHz
Gain potentiometer
MSI2-LVDT
H M L
DO NOT JUMPER
THESE PINS!