Medium-frequency acceleration standard measuring device (MF acceleration standard)

This acceleration standard is the national standard for the realization of the unit of acceleration (and the associated scale) at sinusoidal vibration of a solid body in the frequency range from 10 Hz to 5 kHz (preferably used up to 1,25 kHz; at higher frequencies, the HF acceleration standard is preferred). At sinusoidal accelerations free from distortion, the measurands velocity and displacement are generated at the same time so that, in connection with the laser interferometer, the units of the three translational motion quantities (acceleration, velocity and displacement) are realized. The maximum displacement amplitude is 10 mm, the maximum acceleration amplitude 100 m/s². The amplitudes of the motion quantities are measured with a relative measurement uncertainty of 0,1 %. The sensitivity (magnitude) of precise accelerometers (reference and transfer standards) can be measured with a measurement uncertainty of 0,2 % by primary vibration calibration using laser interferometry in accordance with ISO 16063-11, and with an uncertainty of 0,5 % by secondary calibration in accordance with ISO 5347-3 and ISO 16063-21.