Test & Measurement
High-accuracy strain measurements with 24-bit resolution
Data Translation announces the release of a new USB data acquisition module designed for direct connectivity with applications including strain, load, pressure, and other bridge-based measurements. The DT9838 supports full-, half- and quarter-bridge strain gage configurations with programmable bridge excitation up to 10 V and TEDS (IEEE 1451.4) Class II sensor compatible.Feat
The DT9838 provides four channels, each with its own separate 24-bit Delta-Sigma A/D converter with integrated anti-aliasing filter. In addition to allowing the direct connection of full-bridge and half-bridge strain gages with integrated half-bridge completion, the module also offers quarter-bridge support with external bridge-adapters. The built-in bridge excitation supports remote sensing and can be programmed from 0 to 10 V in 167 µV steps. Sensor scaling and offset null can be performed in software and each channel can be configured for voltage measurements up to ±250 mV.
For each input channel a 100 kΩ shunt calibration resistor can be activated by software. The module also includes flexible external and internal trigger functions, and a tachometer input that can be synchronized with the analog data stream. A sync bus connector is provided for synchronizing data acquisition on up to four DT9838 or DT9837A modules. This allows implementing a high-performance strain- and bridge-based USB measurement system with 16 analog inputs. The module is available installed in a compact metal connection box with RJ50 connectors and optional screw terminal adapters. A board-level OEM version can be supplied for integration of the data acquisition hardware into custom systems.
The DT9838 ships with a comprehensive software package that is compatible with Windows 7 (32/64 Bit), XP and Vista. The VIBpoint Framework application is also supported; this software spectrum analyzer allows real-time data acquisition and analysis and provides powerful single-channel and two-channel FFT functionality.