Product category:
Cabling, Conduit, Accessories and Signal Conditioning
News Release from: Macro Sensors | Subject: Model LVC-2500
Edited by the Engineeringtalk Editorial
Team on 18 September 2006
Signal conditioner covers all standard
sensors
Single-channel low-voltage signal conditioner supports any standard LVDT, RVDT or VRT half-bridge sensor.
Macro Sensors introduces a new single-channel low-voltage signal conditioner that supports any standard LVDT, RVDT or VRT half-bridge sensor Operating from 12 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
This article was originally published on Engineeringtalk on 19 Feb 2003 at 8.00am (UK)
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Units offer three analogue outputs: bipolar 0 to +/-10V DC, unipolar 24V DC, or 4 to 20mA (sourcing) in a three-wire common ground system in which the power ground is connected to the output signal's ground.
By shifting a movable internal jumper in the LVC-2500 signal conditioner, users can choose between 3, 5 or 10kHz 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, crosstalk and intermodulation effects.
Internal circuitry produces a low distortion sine wave to excite the LVDT and a synchronous demodulator to convert the LVDT's 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 lowpass 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 math 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.
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