Sensor calibration Accelerometers are precision measuring instruments. They are highly engineered to provide accurate electrical signals representative of the vibration being monitored. Each sensor is calibrated by comparison with a known acceleration level. Calibrations may include frequency response curves, resonant frequency measurements, and transverse sensitivity, as well as other tests. Applications requiring a high degree of accuracy or those in plants requiring certification and traceability require full calibration test results.
Some applications have much less stringent requirements for calibration certification.
Simple sensitivity measurements at a single frequency may be sufficient. Operational verification and certificates of conformance to published specifications may satisfy the calibration needs of many plants. Reducing the final calibration requirements reduces the cost of manufacturing the sensor and should lower the price for predictive maintenance users. Periodic recalibration may be required by plants with strict certification and traceability requirements. It is always recommended that the user has the sensor recalibrated periodically, particularly if the sensor has experienced a high shock level or extreme temperatures for extended periods.