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Calibration accelerometer features shear design

21 October 2014

The new Kistler Type 8080 back-to-back vibration calibration standard accelerometer uses a PiezoStar-based sensing element – said to be a first for a back to back sensor.

The sensor is said to combine good transient response with low case/base strain sensitivity and a 50g range. The accelerometer is designed specifically for use as a transfer standard for calibrating accelerometers and is equally suited to laboratory and field applications.

The new accelerometer features low base strain, long-term and thermal stability and high frequency response. Due to its shear design, it offers minimum sensitivity to shaker lateral rotation (rocking motion). A beryllium mounting base, lapped optically flat, provides optimum coupling between Type 8080 and the accelerometer being calibrated. 

Contained within the housing is a piezoelectric system consisting of a seismic mass preloaded to a PiezoStar element and miniature hybrid electronics. This combination yields a high level, low impedance voltage output signal proportional to the accelerating stimulus.

This PiezoStar-based sensing element offers long-term thermal stability from -65oC to 120oC, and is superior to quartz in terms of voltage gain/noise. The high rigidity provides a frequency response flat to within ±5 % from 1 Hz up to 10 kHz.

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