Accession Number : ADD095025

Title :   High Pressure Calibration. A Critical Review,

Corporate Author : NATIONAL STANDARD REFERENCE DATA SYSTEM

Personal Author(s) : Decker, D L ; Bassett, W A ; Merrill, L ; Hall, H T ; Barnett, J D

Report Date : Jan 1972

Pagination or Media Count : 65

Abstract : A critical review of experimental technique for measuring high pressures has been made. The broad coverage includes discussions relating to: (a) the establishment of a primary pressure scale using the free-piston gage, (b) the selection and precise measurement of identifiable phase changes as fixed pressure points, and (c) the use of interpolation and extrapolation techniques such as resistance gages, equations of state, and optical changes. The emphasis is on static pressure measurements above 10 kbar, but shock measurements are also considered for completeness. The pressure values to be associated with the fixed points have been analyzed in detail. Temperature measurement in the high pressure environment is also reviewed. The accuracy with which pressure can be measured has been carefully considered; the maximum accuracies now obtainable are considered to be of the order of 0.02 percent at 8 kbar, 0.25 percent at 25 kbar, 2 percent at 50 kbar, and 4 percent at 100 kbar. (Author)

Descriptors :   *PRESSURE MEASUREMENT, *CALIBRATION, *MEASUREMENT, *EXPERIMENTAL DATA, *HIGH PRESSURE, EXTRAPOLATION, EQUATIONS OF STATE, ACCURACY, PRECISION, SCALE, GAGES, SHOCK, STATIC PRESSURE, TEMPERATURE, ENVIRONMENTS, PISTONS

Subject Categories : Fluid Mechanics
      Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE