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DEMOD-DVRT®

DEMOD-DVRT®
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LORD PRODUCT DATASHEET DEMOD- DVRT Signal Conditioner Designed for ease of use and general versatility, this printed circuit card provides complete conditioning for any of LORD MicroStrain®’s DVRT® sensors. Each card contains all the requisite components to facilitate plug-and-play use, including active, jumper selectable low pass filters, input supply line filters with reverse input protection, and output line buffers. The DEMOD-DVRT® sine wave excitation and synchronous demodulator provide excellent noise rejection and elimination of thermally induced potentials. Features & Benefits System Overview High Performance Operating from a DC power supply, the DEMOD-DVRT® Signal Conditioner filters incoming transients from the line voltage, and supplies a pure sine wave excitation to the transducer’s bridge. This excitation is used to measure minute impedance changes of the sensing elements. A differential amplifier raises AC input voltages in order to provide optimum demodulator performance. The output is filtered and buffered to provide clean, high level signals over coaxial cable. temperature compensated signal conditioning precision synchronous demodulation rapid warm-up time Ease of Use plug-and-play with LORD MicroStrain® motherboards compatible with all LORD MicroStrain® DVRT sensors adjustable trimmers to set resolution range Applications Used with LORD MicroStrain® DVRT® sensors for: Invivo Strain, Micromotion and deformation in Bone & Tissue Process Control for Production-Line Monitoring Miniature Position Control Elements Linear & Angular Motion Control Measuring Strain and Deflection in Materials and Structures Dimensional Gauging for Quality Control The DEMOD-DVRT® is recommended for use with all standard LORD MicroStrain® DVRT® where the temperature is expected to uniformly change across the sensor itself. If the sensor is expected to be exposed to thermal gradients across its sensing coils (its body), the temperature compensated DEMOD-DVRT® -TC is recommended. Typically, a DEMOD-DVRT® is ordered with a specific LORD MicroStrain® DVRT® and sold as a pair. The pair is calibrated together at the factory and delivered with a common calibration certificate to ensure accurate performance in the user’s hands. The certificate provides several output calculations including Linear Fit, Multi-Segment Fit and Polynomial Fit. LORD MicroStrain®’s Motherboard products are designed to house 1 to 8 DEMOD-DVRT®. The Motherboards have a desktop console form factor and provide a plug-and-play chassis. The Motherboard variously provides power, grounding, multiplexing, analog-to-digital conversion, configuration, analog output, RS-232 output and LCD display.

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DEMOD- DVRT® Signal Conditioner High Bandwidth High Level Analog Output Unity Gain Line Filter, Reverse input diode protection ground plane MicroStrain®, S-DVRT® SG-DVRT® M-DVRT® MG-DVRT® NC-DVRT®, DEMOD-DC® and □EMOD-DVRT® are trademarks of MicroStrain, Specifications are subject to change without LORD Corporation MicroStrain® Sensing Systems Patent(s) or Patent(s) Pending

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