Low-noise remote charge converter 2771C series

Model 2771C-XX remote charge converter (RRC) is an ultra low noise, two-wire, single-ended device designed for use with piezoelectric transducers. This device transforms the transducer’s high impedance charge output to a low impedance voltage proportional to the transducer’s charge. The signal output from the RCC is less susceptible to noise pick-up because of its low impedance. Also, the shunt capacitance of the cable connecting the RCC to the main conditioner does not significantly affect the noise and sensitivity of the system. The signal output from the RCC and the current to the RCC are carried with the same wire. 2771C has fixed gains of 0.1 mV/pC, 1.0 mV/pC, 5.0 mV/pC, 10 mV/pC. This is a low noise device. It operates within a constant current range of 4 to 20 mA. This unit supports the proposed IEEE P1451.4 TEDS (Transducer Electronic Data Sheet); a memory chip that allows storage and recall of the following sensor data: sensitivity, model number, serial number, manufacturer, date of last calibration and sensor location. Specifications The following performance specifications conform to ISA-RP-37.2 (1964) and are typical values, referenced at +75˚F (+24˚C) and 100 Hz, unless otherwise noted. Calibration data, traceable to National Institute of Standards and Technology (NIST), is supplied.