Sensor excitation of 4.5V RMS is provided Selectable excitation frequency between 1 and 5 kHz Selectable sensitivity from 20mV to 10V
and fine trim with potentiometer Wide bandwidth (200 Hz) for test & measurement applications Selectable analogue output in voltage or current loop format
including 4-20mA and 0-10VDC IP65 / NEMA4 ABS bulkhead mountable case with cable glands
Mains version LVDT/A can also be powered from DC source
Can be used with Variable Reluctance transducers too
The LVDT/A & LVDT/D provide a wide range of signal
conditioning for LVDT and RVDT transducers.
They have also been used successfully with variable reluctance transducers such as certain differential pressure sensors. Offered in two versions, the LVDT/A for 115/230V AC or 18-
24V DC operation and the LVDT/D which is DC powered only.
Transducer sensitivities between 20mV and 10V are
accommodated by a combination of DIL switch settings and
a fine trim potentiometer.
Similar arrangements are provided for any ‘zero’ errors in
the transducers and can be used to offset the readings by up
to ±35% of full scale.
A wide frequency response is offered, of typically DC to 200Hz.
There is an on-board low pass filter which can be switched in to
reduce high frequency fluctuations or induced electrical noise, to
give stable readings under adverse conditions.
A wide range of output options for current, and uni-polar or bipolar
voltage can be configured by DIL switch settings.
Both the AC and DC versions are based on a common board and
are mounted in a light grey ABS case sealed to IP65 standard.
Power supply AC LVTD/A only 50-60Hz
Power Supply DC LVDT/A & LVDT/D
Power supply current (depends on loading)
LVDT Frequency (Switch selectable 1, 2, 3, 4, 5 kHz)
LVDT Sensitivity (switchable)
Gain adjustment (pot-fine adj)
Offset adjustment (pot - fine adj)
Offset adjustment (switchable - coarse adj)
Filter cut-off (switchable ranges)
Zero temperature coefficent
Span temperature coefficient
Gain stability - 1st 1000 hours
90 day offset stability
Operating temperature range
Storage temperature range
Noise (1kHz / 20Hz filter / DC powered)
±10V, ±5V, 0-10V, 0-5V, 0-20mA, 4-20mA
NB: Current output is link selectable for source or negative sink (common negative or common positive)
Field screw terminals - 2.5mm2 rising clamp
ABS case 180 x 80 x 55 vsealed to IP65 fitted with 3 off cable glands
Gain pot, Offset pot, Coarse Gain switches, Coarse Offset switches, Filter Cut-Off switches, Frequency Select switch, Output Mode switch
LVDT/A Analogue conditioner, AC powered
LVDT/D Analogue conditioner, DC powered
CE & Environmental
95% maximum non-condensing
Safety/Low Voltage Directive
73/23/EEC amended by 93/68/EEC
BS EN 61010-1:2001, IEC 1010-1-1990
Basic Standard BS EN 61326:1998
BS EN 55011:1998
BS EN 61000-42:1995
BS EN 61000-4-3:2002
BS EN 61000-4-4:2004
BS EN 61000-4-11:2004
LVDT/RVDT Signal Conditioning Amplifier
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