DEMOD-DC®
The DEMOD-DC in-line signal conditioner makes LVDT sensors as easy to use as a potentiometer. With integral signal conditioning electronics, simply connect power, ground, and analog out, and the DEMOD-DC outputs a buffered, high-frequency response voltage proportional to linear position. During the manufacturing process the analog output voltage is digitally trimmed, ensuring every LVDT’s offset and gain values produce optimal system output accuracy. The DEMOD-DC provides internal power regulation and reverse polarity protection and operates with a wide range of input voltages.
THIS PRODUCT HAS BEEN DISCONTINUED AND IS NO LONGER AVAILABLE FOR PURCHASE.
Operating from a DC power supply, the DEMOD-DC® Miniature In-line Signal Conditioner filters incoming transients from the power supply, and supplies a sine wave excitation to the DVRT®. This excitation is used to measure minute impedance changes of the sensing elements. Precision demodulator components provide rectification and differential amplification. Digital trimming ensures conformity from sensor to sensor. The analog output is filtered and buffered to provide clean, high level signals.
The DEMOD-DC® is recommended for use with all standard LORD MicroStrain® DVRT® where a lower cost and smaller size signal conditioner is required. 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. Additionally, if the LORD MicroStrain® DVRT® has been customized and built with one coil, the DEMOD-DVRT® -TC is again recommended.
Typically, a DEMOD-DC® 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. This ‘paired’ calibration ensures accurate performance in the user’s hands. The certificate provides several output calculations including Linear Fit, Multi-Segment Fit and Polynomial Fit.
Ease of Implementation
- Out-of-the-box use with all standard LORD MicroStrain® DVRT® sensors
- Miniature body for embedded and space restricted applications
- Identical performance between units for quick scaling
High Performance
- High dynamic range for difficult measurements
- Ready for use with LORD MicroStrain® wireless sensor network
Signal Conditioner
- Sensor Types: Parker LORD inductive LVDT (formerly DVRT®) sensors
- Excitation: Regulated sinewave, 150 kHz standard (other frequencies available on request)
- Demodulation: Asynchronous, DC output
- Gain: Factory adjustable from 10 to 10,000
- Low-Pass Filter: 2 Pole, 3dB down @ 800Hz standard, factory adjustable 10Hz to 20kHz for higher bandwidth (lower resolution) or higher resolution (lower bandwidth)
Operation
- 0 to 5V typical, digitally trimmed
- Unique calibration curves provided with each unit for optimal accuracy
- Supply Voltage: +6 to +16 VDC
- Supply Current: 22 mA typical (~15 mA when modified for use with V-Link-200 wireless node)
- Warm-Up Time: 30 seconds recommended
Package
- Operating Tempurature: -40 to +85°C
- Enclosure Size: 65.7mm x 19.9mm x 8.3mm
- Connector:
- Interface: micro-D (MIL-C-83513/5) mating connector included for power supply, ground, analog output
- Sensor: 4-pin PEEK LEMO connector
- Weight: 12g
- 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
General Documentation
Software/Firmware
There are no software or firmware downloads for this product at this time.
