Use of higher order Heydemann-Welch model to characterize a controlled clearance piston gauge

Published

October 17, 2012

Author(s)

Douglas A. Olson, Shaker A. Gelany, Alaaeldin A. Eltawil

Abstract

We present measurements on characterizing a new controlled-clearance piston gauge made by Ruska (Fluke Calibration) which has a 290 MPa maximum pressure and a nominal piston diameter of 3.27 mm. We tested the piston gauge to jacket pressures of over 80 % of the system pressure (but not exceeding 200 MPa). Measurements showed that the cylinder becomes stiffer as the jacket pressure increases, and that non-linear models of the Heydemann-Welch parameters improve the determination of the effective area. The relative standard uncertainty in the effective area of the piston gauge ranges from 16.0E-6 to 17.6E-6, and the agreement to the present NIST pressure scale is within the standard uncertainty.

Citation

Ptb-Mitteilungen

Volume

45

Issue

10

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.measurement.2011.10.047

Keywords

controlled clearance piston gauge, effective area, Heydemann-Welch, piston gauge, pressure, primary pressure standard

Citation

Olson, D. , Gelany, S. and Eltawil, A. (2012), Use of higher order Heydemann-Welch model to characterize a controlled clearance piston gauge, Ptb-Mitteilungen, [online], https://doi.org/10.1016/j.measurement.2011.10.047 (Accessed October 8, 2025)