Accelerometer calibrators, reference shakers for accelerometer calibration / 8921B

These accelerometer calibrators of Type 8921B provide an accurate, controlled vibration level to verify the sensitivity of acceleration sensors or the complete measuring system. The internal control and excitation system provides a constant (Type 8921B01) or selectable (Type 8921B02) precise frequency, while a closed-loop control maintains a constant (Type 8921B01) or selectable (Type 8921B02) amplitude independent of the mass of the test article. Should the test article exceed the capacity of the shaker, the acceleration calibrator provides an audible and visual warning to the operator. A self-contained, rechargeable battery can power the shaker up to approximately five hours between recharging.