Patent ID: 9322759
Filing Date: 2016-04-26
CPC Classification: G01N

Claim Text:
1. A vibrating tube densitometer calibrated in accordance with a method, wherein: density correction coefficients are established at a reference temperature and pressure condition and are combined with a time period of oscillation measurement to give an uncorrected density value D; temperature effects correction coefficients are established at a reference pressure condition and are combined with a temperature measurement to modify the uncorrected density value D to obtain a temperature corrected density value D pressure effects correction coefficients are established at a reference temperature condition and are combined with a pressure measurement to modify said temperature corrected density value D establishing one or more further correction factors to compensate for temperature-pressure coupling effects arising at a combination of elevated temperature and elevated pressure, said one or more further correction factors being combined with said measurements of temperature and pressure to modify said pressure corrected density value D