Finds density from the densitometer resonant frequency for Solartron 7810, 7811 and 7812 gas densitometers.
Density is corrected to compensate for the operating temperature. The density is also corrected to compensate for the process gas by means of the velocity of sound correction. Constants used are from the gas densitometer calibration certificate.
Solartron 7810 & 7811 Gas Density Transducer Technical Manual:1994
Solartron 7812 Gas Density Transducer Technical Manual:2001