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The differential in-line charge converters are designed to convert the high impedance of a differential,
charge mode piezoelectric transducer to a low-impedance voltage by means of an ICP ® signal
conditioner. These units may be used with either quartz or ceramic, differential charge-mode
piezoelectric sensors.
description
The differential 422 series in-line charge amplifiers operate from an ICP ® signal conditioner. The unit
employs a high gain amplifier to perform the impedance transformation. The charge output of the
transducers may be scaled in terms of acceleration, pressure or force. The output is then mV/g, mV/psi
or mV/lb, respectively.
installation
Connect the differential 422 series to the transducer with low-noise cable only. Standard coaxial or
two-wire cable may be used between the amplifier and the signal conditioner, and between the signal
conditioner and the readout device.
Note: For optimum noise performance, the cable length between the sensor and the 422 should be
minimized.
operation
To operate, simply connect the input of the differential 422 series to the transducer using low-noise
cable and the output to any ICP ® signal conditioner using standard cable. The output of the signal
conditioner may then be connected to an oscilloscope or other monitoring device. This output will be
an AC signal (see
specification
for actual frequency response) with a DC bias. Many PCB signal
conditioners remove the bias via an AC coupling circuit.
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Summary of Contents for 422M183
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