The Effect of High Transverse Inputs on Accelerometer Calibration

Sensor setup mounted on insert back-to-back reference accelerometer on air-bearing calibration shaker.

ISO 16063 part 21 defines the back-to-back comparison technique for accelerometer calibration. Included in its most recent revision is a recommendation for acceptable limits on shaker transverse motion characteristics. The effect of high transverse inputs can be devastating to accurate accelerometer calibration. This paper discusses the differences between mechanical flexure-based electrodynamic shakers and air bearing shakers and the resulting effects on calibration accuracy and uncertainty.

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