Figure 16. Residuals from the Densimeter Tests.
As mentioned before, the coefficients A and B are temperature dependent. In order to find these dependencies, the Anton Paar Densimeter was calibrated using air and water in the temperature range 18 °C to 36 °C in 2 °C steps.
It was found that both A and B can be approximated with linear dependence with
A=2.40900x10-2-2.97018 x10-6 (T/°C) and
B=26.06049-3.519921 x10-3 (T/°C),
where T is the tube temperature in °C (see Figs 17 and 18).