C series modules for high-performance data logging

National Instruments Corporation (UK) Ltdvisit website


C series modules for high-performance data loggingNational Instruments is announcing four new C Series modules for data-logging applications including vibration/acoustical data logging and in-vehicle, structural, temperature and pressure testing. The NI USB-9219, USB-9229 and USB-9239 provide USB bus-powered connectivity to the C Series while the NI 9234 AC/DC-coupled dynamic signal acquisition module offers selectable IEPE signal conditioning for measuring high-accuracy audio frequency.

C Series units combine signal conditioning, direct sensor connectivity and data acquisition into a small module for each measurement type that can be inserted into any C Series chassis to create a variety of systems. There are more than 40 C Series modules available for different measurements including thermocouple, voltage, RTD, current, resistance, strain, digital (TTL and other), accelerometers and microphones. The new modules are enhanced with the inherent data acquisition and analysis features of NI LabVIEW software.

The new bus-powered USB-9219, USB-9229 and USB-9239 four-channel universal C Series modules are designed for multipurpose testing in any NI CompactDAQ or CompactRIO chassis, or with the NI USB-9162 single-module carrier. With the new USB-9219 universal module, up to 11 types of signals from sensors such as strain gauges, RTDs, thermocouples and load cells can be measured. With channel-to-channel isolation, an entire system, including the device under test, is protected from harmful voltage spikes up to the isolation rating. In addition to safety, isolation eliminates measurement errors caused by ground loops. Measurement ranges for the USB-9219 include up to +/-60V DC and +/-25mA, making it suitable for in-vehicle data-logging applications that often require 12V DC or 42V DC of measurement range. The USB-9229 and USB-9239 high-speed data-logging modules acquire 50kS/s per channel and include anti-aliasing filters to eliminate unwanted signals for monitoring applications such as structural health, machine condition monitoring, electrical power and environmental monitoring. The USB-9239 operates at +/-10V DC for precise, high-speed sensor measurement, while the USB-9229 operates at +/-60V DC for sensors with a higher output range such as proximity probes used for vibration data logging.

Sound and vibration

The NI 9234 dynamic signal acquisition module is suitable for vibration and acoustical data logging because IEPE conditioning can be turned on or off and AC or DC coupling can be selected. The module delivers 24bits of resolution, 102dB of dynamic range and anti-aliasing filters. The NI 9234 module can be used with the NI Sound and Vibration Measurement Suite, which includes the Sound and Vibration Assistant to simplify acquiring and analysing noise and vibration signals by offering a standalone, interactive analysis and acquisition environment. The standalone software makes it possible to interact continually with varying data analysis settings while logging data to disk for future analysis.

C Series modules can be used with the USB-9162 single module carrier and NI CompactDAQ and CompactRIO hardware. Combining this hardware with LabVIEW software creates a user-defined data-logging application. With LabVIEW graphical programming, custom user interfaces can be created and more than 600 mathematical and analysis functions are available.

NI provides both PC-based and embedded data-logging hardware approaches for a wide span of data-logging applications. The small size, ruggedness and hot-swappable industrial I/O C Series modules are designed as self-contained data-logging modules. All circuitry required for a specific measurement is contained in the module and all A/D and D/A conversion takes place in the module before data reaches a chassis.

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20 March 2008

National Instruments Corporation (UK) Ltdvisit website
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