engleski

Response Time of Air Gauges With Different Volumes of The Measuring Chambers

In the paper, investigations on the dynamic properties of air gauges are presented. The measurement of the amplitudes of back-pressure pk, dependent on the input signal angular frequency ω for the group of air gauges with various parameters has been performed. To evaluate the influence of the measuring chamber volume on the dynamical properties, a set of the model chambers with different dimensions has been prepared. The obtained results underwent a repeatability test in order to evaluate the uncertainty of time constant determination. Additionally, the impact of the feeding pipe was examined. Examinations of the time constant of typical backpressure air gauge led to the conclusion that it depends also on the actual pressure and that it may differ between the beginning and the end of the measuring range.

Air Gauging; Frequency Characteristics; Dynamical Properties; Geometrical Metrology.

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