7812 Solartron Gas Densitometer

Calculation for corrected density

This standard calculates the density from the measured frequency and densitometer constants obtained from calibration.



The uncorrected observed density is calculated as follows:

solartron_7812_uncorrected

Symbol Description Units
ρi Uncorrected observed density kg/m3
Dτ Densitometer periodic time µs
k0 Densitometer calibration constant -
k1 Densitometer calibration constant -
k2 Densitometer calibration constant -


The density is then corrected for temperature:

solartron_7812_temperature

Symbol Description Units
ρt Temperature corrected observed density kg/m3
ρi Uncorrected observed density kg/m3
t3 Temperature at fully recovered pressure position °C
tc Densitometer calibration temperature -
k18 Densitometer calibration constant -
k19 Densitometer calibration constant -


The density is then corrected for velocity of sound:

solartron_7812_VOS

Symbol Description Units
ρVOS Velocity of sound corrected observed density kg/m3
ρt Temperature corrected observed density kg/m3
t3 Temperature at fully recovered pressure position °C
A Densitometer constant for the calibration gas used -
SG Specific Gravity -
Y Specific Heat Ratio -
k3 Densitometer calibration constant -
k4 Densitometer calibration constant -

References