New low voltage LVDT signal conditioner

Macro Sensors introduces a new single channel, low voltage signal conditioner that supports any standard LVDT, RVDT and VRT half-bridge position sensor

Macro Sensors, a sensor company specialising in the manufacture of LVDT-based linear position sensors and gauging probes, introduces a new single channel, low voltage signal conditioner that supports any standard LVDT, RVDT and VRT half-bridge sensor.

Operating from 12V or 24V DC power, the Model LVC-2500 DC-LVDT Signal Conditioner is designed specifically for use in 24V systems with PLCs and mini-PLCs, or in 12V mobile and vehicular testing systems.

Units offer three analogue outputs: bipolar 0 to 10 V DC, unipolar 24 V DC, or 4 to 20 mA (sourcing) in a 3-wire common ground system in which the power ground is connected to the output signal ground.

By shifting a movable internal jumper in the LVC-2500 Signal Conditioner, users can choose between 3, 5, or 10 kHz nominal excitation frequencies at a level of 3V rms for operating LVDTs with primary impedance.

For multiple channel applications, several LVC-2500 modules can be connected together in a master/slave mode to synchronise their excitation oscillator frequency.

This eliminates the effects of spurious beat frequency signals, cross talk, and intermodulation effects.

Internal circuitry produces a low distortion sine wave to excite the LVDT and a synchronous demodulator to convert the LVDT AC output to a more useful DC voltage proportional to core position.

Additional circuitry regulates DC operating power and provides span and zero adjustability, a two-pole low pass output filter, and the voltage-to-current conversion that drives the current loop output.

Packaged in a DIN-rail mounting thermoplastic case, the LVC-2500 withstands the abuse of different factory environments.

Front-panel, externally accessible span and zero controls permit output offset adjustment from -100% to +100% of full-scale output.

Units incorporate movable coarse gain jumpers, which allow it to operate over an LVDT full-scale output signal range of greater than 100 to 1.

As the LVC-2500 does not require phase adjustment control, it works with reasonably long cables between it and the LVDT.

The LVC-2500 Signal Conditioner also offers several popular maths functions that can be used between two modules.

These include A+B, A-B,(A+B)/2, and (A-B)/2.

Therefore, two LVC-2500 modules can be connected together, along with a pair of LVDT gauging probes, to measure differential dimensions, thicknesses, and average height of products in SPC and other quality control applications.

For general specifications and other information on the Model LVC-2500 DC-operated LVDT Signal Conditioner, visit the Macro Sensor web site or contact Eileen Otto in the sales department.

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