Procedimiento de medición precisa de la densidad de una muestra

摘要

The method involves determining resonant frequency from variations of voltage of a capacitor terminal (6), and deducing an approximate value of density of a sample to be analyzed based on a known standard equation. Pulse width of a rectangular excitation signal is controlled to maintain predefined constant amplitude of a resonance signal, and a correction factor is deduced based on viscosity of the sample to be analyzed. The actual density of the sample to be analyzed is calculated based on the determined approximate value of the density and the correction factor.