Controlling NI 4472 Excitation Current from LabVIEW
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This example illustrates how to use LabVIEW to programmatically enable or disable excitation current on the NI 4472 Dynamic Signal Acquisition (DSA) devices.
The excitation current, which you can control on a per-channel basis, is a constant 4 mA current that provides power to the onboard pre-amplifier on a variety of sensors including many accelerometers, microphones, and dynamic pressure transducers. PCB Piezotronics, a vendor of accelerometers and microphones, refers to this 4 mA excitation as "IEPE", short for Integral Electronic Piezoelectric. IEPE excitation is compatible with similar DC current-driven sensors from other vendors including Kistler, Endevco, and Bruel & Kjaer.
NOTE: The excitation current produces a significant DC offset in the data. To remove this offset, enable AC coupling on all channels supplying excitation current.
Filename: 2178.llb
Application Software: LabVIEW Full Development System 6.0
Language(s): LabVIEW
Hardware Group: Multifunction DAQ (MIO)
Driver: Traditional NI-DAQ (Legacy) 6.9.0
The excitation current, which you can control on a per-channel basis, is a constant 4 mA current that provides power to the onboard pre-amplifier on a variety of sensors including many accelerometers, microphones, and dynamic pressure transducers. PCB Piezotronics, a vendor of accelerometers and microphones, refers to this 4 mA excitation as "IEPE", short for Integral Electronic Piezoelectric. IEPE excitation is compatible with similar DC current-driven sensors from other vendors including Kistler, Endevco, and Bruel & Kjaer.
NOTE: The excitation current produces a significant DC offset in the data. To remove this offset, enable AC coupling on all channels supplying excitation current.
Requirements
Filename: 2178.llb
Software Requirements
Application Software: LabVIEW Full Development System 6.0
Language(s): LabVIEW
Hardware Requirements
Hardware Group: Multifunction DAQ (MIO)
Driver: Traditional NI-DAQ (Legacy) 6.9.0
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