Card provides signal conditioning for bridge sensors - Embedded.com

Card provides signal conditioning for bridge sensors

Livingston, Scotland — Scalar Acquisition Technology has released a signal conditioning module for bridge type sensors. The board is designed to power and signal condition most strain gauge or piezoresistive devices presently on the market, whether they be configured as single, half or full bridges.

The 3U modules are suitable for 1-, 2-, and 4-arm bridge applications allowing a system to be assembled providing sensor supply, zero, gain and calibration functions.

The SAT-SSC2 provides constant voltage excitation and conditioning for 1-, 2-, and 4-arm resistive bridges and features computer control of gain, offset null, excitation voltage, digital shunt calibration and full/half/quarter bridge configuration. Precision bridge configuration resistors are supplied with the board to complete the bridge for quarter, half, or full bridge configurations. Automatic bridge balancing copes with a wide range of bridge imbalance conditions, maximizing dynamic range at all times.

It features a programmable constant voltage excitation supply that can source up to 10V. Dedicated remote sense lines allow the excitation supply regulator to deliver an accurate voltage to the bridge. Gain is programmable in 1, 2, 5 sequence from 10 to 10,000 and the frequency response extends up to 600kHz allowing the use of very high speed sensors. Designed with a noise floor of –96dB, the SAT-SSC2 is ideally suited for use in 16 bit data acquisition systems.

The SAT-SSC2 input stage has been designed for low DC drift and low noise with provision for a low pass filter for frequency and noise shaping. Outputs are fully buffered and have high current drive capability to assist with the driving of long cable runs and the A/D input stages in data acquisition units. Over-range circuitry on each channel alerts the user to over-voltage conditions.

The SAT-SSC2 can be supplied, ready assembled, in a 3U rack mount system with outputs on BNC or ‘D’ type connectors.

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