| 摘要 |
The invention describes and illustrates a method for operating a density measuring apparatus having a measuring tube (1) for determining the density of a medium (2), wherein the measuring tube (1) is filled with the medium (2), the measuring tube (1) is stimulated to carry out an oscillation, the frequency of the oscillation is ascertained and the density (p) of the medium (2) is calculated on the basis of the ascertained frequency and other parameters which define physical-geometric characteristics of the measuring tube (1). It is an object of the present invention to - at least partially - avoid the disadvantages mentioned in the known method for operating a density measuring apparatus and the known disadvantages of exactly this type of apparatuses for density measurements. The object mentioned is achieved according to the invention firstly and substantially by ascertaining at least a mechanical tension (s, T) of the measuring tube (1) and, on the basis of the obtained mechanical tension value, the influence of the mechanical tension (s, T) of the measuring tube (1) and/or the influence of the pressure (p) in the medium (2) on the ascertained density (?) of the medium (2) is or are - at least partially - taken into account and/or compensated for. |
