Vibration calibrator

The vibrating part of the instrument is usually a cylindrical steel stud with an internal thread for attachment of the test object.

With older instruments it was necessary to adjust the vibration amplitude according to the weight of the test object.

However, modern instruments contain a built-in reference accelerometer and closed-loop control, with which the amplitude is kept constant up to a maximum specified weight of test object.

Older models can be used to calibrate objects weighing up to a maximum of approximately 100 g, whereas the latest instruments can work stably with test objects weighing over 500 g. Vibration calibrators are most often used for testing and checking vibration sensors and measuring instruments at the site of their operation and are, therefore, usually transportable and battery operated.

The vibration displacement, velocity and acceleration of sinusoidal signals are connected with each other through the factor of the radian frequency.