A Liquid-Medium Step-Function Pressure Calibrator

[+] Author and Article Information
R. O. Smith

National Bureau of Standards, Washington, D. C.

J. Basic Eng 86(4), 723-727 (Dec 01, 1964) (5 pages) doi:10.1115/1.3655935 History: Received September 25, 1963; Online November 03, 2011


Some characteristics of a step-function pressure calibrator of the type devised by D. P. Johnson and J. L. Cross of NBS have been investigated. Theoretical prediction of the wave generation appears to be impracticable. It has been found possible, by empirically determined adjustments, to produce monotonic step functions having 95 percent rise times in about 10 millisec suitable for calibration of transducers. Calibration accuracies are around 5 to 7 percent. The monotonic step-function pressure is also useful in evaluating creep or hysteresis in high frequency transducers which previously could not be inspected for that characteristic.

Copyright © 1964 by ASME
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