Level-measuring device with selectable quality level of a monitoring function

A level-measuring device for determining a level of a medium, comprising:

• processing circuitry configured to
• generate a measuring signal for determining the level based on a digitally converted signal of a reflected signal emitted from the level-measuring device toward the medium,
• determine the level of the medium based on a characteristic feature of the measuring signal, and
• monitor, by way of a monitoring function that is separate from the determination of the level, a correctness or plausibility of the determined level based on the characteristic feature,
• wherein the monitoring function is selectively operable at a first quality level or a second quality level, and the quality of monitoring is higher at the first quality level than at the second quality level,
• wherein the processing circuitry is further configured to selectively determine the level of the medium in an operating mode or a start-up mode, the start-up mode corresponding to a commissioning phase of the level-measuring device, and
• wherein, in the start-up mode, the processing circuitry is configured to perform reference measurements of the level at different filling levels of the medium and to operate the monitoring function at the first, higher quality level to verify an accuracy and safe operation of the determined level, and
• wherein, in the operating mode, the monitoring function operates at the second, lower quality level.