Implementation of an Accelerometer Transverse Sensitivity Measurement System

Abstract: The National Metrology Institute of South Africa (NMISA) has implemented a system to measure the transverse sensitivity of accelerometers. The system is in compliance with ISO 16063-31. As a mechanical device, the principle sensing axis of an accelerometer is not 100 % perpendicular to the mounting axis. This gives rise to the effect that the accelerometer will produce an electrical output even when a mechanical input perpendicular to the principle measurement axis is applied. The quantification of this “defect” parameter is of importance when high accuracy acceleration measurements are performed using accelerometers. This paper describes the system implemented by the NMISA to measure the transverse sensitivity of vibration transducers.