Calibrating an electromechanical fill-level measuring device

A method for calibrating the weight measuring system of an electromechanical fill-level measuring device, comprising:

• at least one displacement element, which is connected by means of a measurement wire windably at least with a measurement drum;
• at least one measuring shaft, with which said measurement drum is mechanically fixedly connected, wherein the shaft is held rotatably in at least one rotary bearing;
• at least one weight measuring system, which ascertains the effective weight of said displacement element and said measurement wire;
• and a servomotor, which is coupled with said measuring shaft and which rotates said measuring shaft corresponding to an ascertained weight measurement, so that an ascertaining of the relative movement of said measurement drum produced by a change of the liquid level to be measured is provided, wherein:
• a calibration mode of said weight measuring system of the electromechanical fill-level measuring device is provided, in which a plurality of freely hanging displacement elements with defined mass, each having a different mass, are provided for ascertaining their weights on said measurement wire;
• and after each change of the freely hanging displacement elements with defined mass a predefined rotational movement of said measurement drum is provided, and their ascertained weights are provided as calibration values for the weight measuring system;
• the method comprising the steps of:
• freely hanging displacement elements with defined mass for ascertaining their weight on the measurement wire;
• and
• after each change of the freely hanging displacement elements with predefined mass a predefined rotational movement of the measurement drum is performed, and the ascertained weights are used as calibration values for the weight measuring system.