With the introduction of ISO 9001, periodic recalibration of accelerometers and other transducers has become a requirement. Many companies have elected to purchase calibration systems that might result in a savings of time and financial resources, but without a thorough understanding of the equipment and its operation, the user may receive incorrect readings and make costly errors. This paper provides a broad overview of the Back-to-Back Calibration technique, a quick and easy method for determining the sensitivity of a test accelerometer over a wide frequency range, as well as an alternative method for making the same determination.
