Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Automating the Calibration of Two Piston Gage Pressure Balances



Douglas A. Olson, T Kobata


We propose a method to automate the data-gathering process in the cross-float calibration of one piston gage pressure balance against a second piston gage pressure balance. Rather than adjusting small trim masses until the balances generate equal pressure, the two balances are brought into only approximate pressure equilibrium. They are then sequentially connected to a pressure transducer, through use of constant volume valves, to measure the differential pressure. We present results of the method on a 200 MPa hydraulic system. We explore limitations to the method, including the allowable pressure difference between the two pressure balances, the sequencing procedure of the pressure balances, and the characteristics of the pressure transducer.
National Conference of Standards Laboratories International


calibration, crossfloat, piston gage, pressure, pressure balance, pressure transducer


Olson, D. and Kobata, T. (2002), Automating the Calibration of Two Piston Gage Pressure Balances, National Conference of Standards Laboratories International (Accessed June 20, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created August 1, 2002, Updated February 17, 2017