Bestech Australia LVDT Signal Conditioner

The LVC 2500 LVDT signal conditioner from MacroSensors is a single channel conditioner that operates on 10-30 V DC power to support standard LVDT, RVDT and VRT half-bridge sensors. It is designed for use in 24 V systems with PLCs, or in 12 V mobile and vehicular testing systems. It offers the user a choice of three analogue outputs: ±10 V DC, 0 -10 V DC or 4 - 20 mA (sourcing) current loop in a 3-wire common ground system.

The LVDT signal conditioner is packaged in a DIN-rail mountable thermoplastic case. It has recessed screw-clamp terminals and multiturn front-panel span and zero adjustments. It uses internal circuitry that produces a low distortion sine wave to excite the LVDT and employs a synchronous demodulator to convert the LVDT’s AC output signal to DC outputs proportional to core position. By shifting an internal jumper, the user can choose 3, 5 or 10 kHz nominal excitation frequencies at 3 V rms. The output nonlinearity is less than ±0.01% of full-scale output.

For multiple channel applications, several of these modules can be connected together in master/slave mode to synchronise their excitation oscillator frequency, thereby eliminating effects of heterodyning and spurious beat frequency signals, cross talk and intermodulation effects. In addition to its features, the LVDT signal conditioner enables value measurements of A+B, A-B and (A+B)/2. Thus two LVC-2500 signal conditioners can be connected together along with a pair of LVDT gauging probes to measure differential dimension, thickness and average height.