Campbell Scientific has released a new CR9000(X) I/O Module, the CR9052IEPE. This Filtered Analog Input Module and FFT Spectrum Analyzer for IEPE sensors is similar to the CR9052DC.
The CR9052IEPE and CR9052DC use the same motherboard, which includes a high-performance anti-alias filter, a Fast Fourier Transform (FFT) spectrum analyzer, and six analog differential channels. The daughterboards are different, allowing the modules to measure different sensor types. The CR9052IEPE's daughterboard provides current source excitation and ac coupling for direct connection and measurement of Internal Electronics Piezo-Electric (IEPE) accelerometers and microphones.
An on-board 34 V, high efficiency, low noise, charge pump power supply provides a constant current excitation of 2 mA, 4 mA, or 6 mA eliminating the need for an dedicated external IEPE power supply.