Ultra low noise remote charge converter for
more precise transducer measurements
The Endevco 2771C ultra low noise remote charge converter improves upon the industry standard 2771B by reducing low frequency noise by over 50 percent compared to currently available devices, enabling more precise measurements from piezoelectric transducers.
The Endevco model 2771C transforms a piezoelectric transducer's high impedance charge output to a low impedance voltage proportional to the transducer's charge output. This low impedance signal output is less susceptible to noise pick-up which is vital for critical measurement applications including mechanical system health monitoring, modal analysis, flight testing and drop testing.
As an ultra low noise device, the 2771C provides a frequency response of 0.4 to 50 kHz and operates within a constant current range of 4 to 20 mA. It measures 1/2-inch in diameter by 3.2 inches in length and is available in fixed gains of 0.1 mV/pC, 1.0 mV/pC or 10 mV/pC. Custom gains may also be available in quantities.
The 2771C is designed to operate over a wide temperature range of -40F to 212F (-40C to 100C) and withstand shock loads up to 100g peak and radiation up to 1.0 MRads. It also supports the IEEE 1451.4 TEDS (Transducer Electronic Data Sheet), a memory chip that allows storage and recall of sensor data including sensitivity, model number, serial number, manufacturer, date of last calibration and sensor location.
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