An accelerometer detects physical motion and converts it into an electrical signal that can be measured and recorded. Calibrating the accelerometer provides a physical meaning to this electrical signal and is imperative for quality measurements . When using vibration sensors for certain types of machine testing, calibration traceability is required (i.e. pump or motor acceptance testing).
Ensuring vibration sensors are properly calibrated on a routine basis ensures a more accurate and consistent reading, resulting in increased performance and results from any monitoring system. Most manufacturers recommend accelerometers be calibrated on an annual basis, but in some cases it should be done more often. If a sensor has been out of service for an extended period of time, was dropped, or temperature thresholds were exceeded, then it is recommended to calibrate to ensure continued accuracy.
