Densitometer proving system

Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...

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73434, G01N 904, G01D 1800

Patent

active

045704767

ABSTRACT:
A trailer mounted densitometer proving system includes three product tanks, each of which stores a respective petroleum product having a differing specific gravity. The product from any one of the three tanks is circulated via an electric pump through a pycnometer, a densitometer being proved, and a heat exchanger. The heat exchanger controls the temperature of the circulating product and a pressure control system controls the pressure of the circulating product. By comparing the pycnometer weight with the densitometer reading, the densitometer can be proved for a wide range of pressures, temperatures and products in order to determine the accuracy of the densitometer under actual working conditions.

REFERENCES:
patent: 2364709 (1944-12-01), Greer
patent: 2745484 (1956-05-01), Eckstrom et al.
patent: 3218841 (1965-11-01), Lerner
patent: 3812723 (1974-05-01), Barron
patent: 4195527 (1980-04-01), Ebeling et al.
patent: 4285239 (1981-08-01), Heine et al.
"High Vacuum Calibration of a Cyrogenic Quartz Crystal--An Atmospheric Density Gauge"; The Journal of Vacuum Science and Technology; vol. 8, No. 1; Feb. 1971; pp. 294-298; Wallace W. Youngblood.
"Installation for Testing Densimeters"; Meas. Tech. (USA); vol. 21, No. 6, pp. 800-803; Nov. 1978; M. I. Kondratenko et al.
A Portable Calibration Densimeter for Use in Cyrogenic Liquids"; Report: NBS Tech. Note 1035; 16 pages; Mar. 1981; J. D. Siegwarth et al.
Manual of Petroleum Measurement Standards Chapter 14-Natural Gas Fluids; Section 6-"Installing and Proving Density Meters Used to Measure Hydrocarbon Liquid with Densities Between 0.3 to 0.7 gm/cc at 15.56.degree. C. (60.degree. F.) and Saturation Vapor Pressure"; Sep. 1979, American Petroleum Institute (API), Title page, pp. i-v, and pp. 1-33.

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