The bridge input module achieves high accuracy with a ratiometric design where the ADC references the excitation voltage. The NI PXIe-4330 24-bit simultaneous bridge input module offers 0.02 percent accuracy and 25 kS/s per channel sample rate for high-performance strain, load, force and torque measurements. With a smaller footprint, simplified cable management and new software features for automatic synchronization, the SC Express modules make it easy for engineers to set up and program high-channel-count sensor measurement systems. PXI Express provides 250 MB/s of dedicated bandwidth for each SC Express module in the chassis, which helps engineers increase channel count without compromising sampling rates or data throughput. The new NI SC Express family delivers increased accuracy, high data throughput and best-in-class synchronization for measuring strain gauges, bridge-based transducers, thermocouples and high-voltage analog inputs.

Please review Measuring Load and Torque with Bridge-Based Sensors, to understand fundamentals of load and torque measurements and how different sensor specifications impact load cell or torque sensor performance in your application, and Pressure Measurement Overview, to understand basic pressure concepts and how different pressure sensors work.National Instruments announced the company’s first data acquisition (DAQ) modules with integrated signal conditioning for scalable, high-performance measurements on PXI Express. This article assumed basic knowledge of load cells, pressure, and torque transducer operating principles. The steps will be using an NI CompactDAQ system with an NI 9237 four-channel simultaneous bridge module and walk through setting up a Global Virtual Bridge Channel in NI Measurement and Automation Explorer (MAX) and testing the signal measurement and then where to find a LabVIEW example to start you application. The article walks through how to make a measurement from bridge-based load cells, a step-by-step instructions for wiring and configuring your NI data acquisition device for strain gauge measurements. The principle also applies for bridge-based pressure and bridge-based torque sensors.

Ni daq module