Method and device for determining the filling quality of a frequency oscillator

A method for determining a filling quality of a frequency oscillator, which comprises the steps of:

• passing a measured fluid through an oscillator tube;
• determining a relationship between a viscosity-dependent density of the measured fluid and a quality and/or an attenuation of the oscillator tube;
• determining a relationship between a dynamic viscosity and the attenuation and/or the quality of the measured fluid;
• using these values to create a calibration curve or calibration table that reproduces a functional relationship between a relevant parameter relevant to the quality and/or the attenuation of the frequency oscillator and the dynamic viscosity of the measured fluid;
• determining at least a measured value for the dynamic viscosity of the measured fluid in a course of measurement of the measured fluid using the frequency oscillator with an independent or further additional meter;
• during the course of measurement of the measured fluid with the frequency oscillator, determining at least a measured value for the relevant parameter, a function value required or determined through the measured value obtained for the dynamic viscosity on the calibration curve or in the calibration table matches a characteristic value which is required or determined through an obtained measurement value for the quality and/or the attenuation on the calibration curve or the calibration table;
• and
• evaluating a result of a comparison with respect to a presence of any filling errors or is used to determine a possible filling error of the frequency oscillator.