National Instruments PCI-4472B

The National Instruments PCI-4472B is a premier sound and vibration data acquisition module designed for high-performance applications requiring precise frequency-domain measurements. Featuring eight dynamic signal acquisition channels, this device supports software-configurable AC/DC coupling and integrated electronic piezoelectric (IEPE) conditioning, making it exceptionally well-suited for use with various transducers, including accelerometers and microphones. The PCI-4472B is ideal for tasks such as machine condition monitoring, noise and vibration diagnostics, and audio testing due to its robust specifications, which include a maximum sampling rate of 102.4 kS/s and a low cutoff frequency of 0.5 Hz. It boasts a dynamic range of 111 dB at sampling rates from 1.0 kS/s to 51.2 kS/s, and 99 dB at rates up to 102.4 kS/s, ensuring high fidelity in signal acquisition.

The device utilizes delta-sigma modulation A/D converters with a 24-bit resolution that enhances linearity while minimizing noise and distortion. With the capability for simultaneous sampling across all eight input channels, it incorporates multiple triggering modes, such as external digital triggering, necessary for capturing transient events like mechanical impacts. Synchronization between multiple PCI-4472B modules is facilitated for precise timing and phase alignment. This device features a positive input impedance of 1 MΩ and a pseudodifferential input arrangement. Its amplifier provides software-selectable AC/DC input coupling, featuring gain accuracy of ±0.1 dB and crosstalk below -90 dB, ensuring minimal interference between channels. A software-controlled constant current source provides 4 mA with ±5% accuracy and 24 V compliance for effective signal conditioning. The PCI-4472B guarantees signal integrity with an output impedance greater than 250 kΩ at 1 kHz and maintains current noise levels below 500 pA.

Designed for versatility in sound and vibration analysis, the PCI-4472B measures 6.9 x 4.2 inches and weighs 7 ounces, and it is backed by a three-year warranty. Comprehensive user and maintenance manuals are available for download. Pricing is available upon request from a sales representative.