Erta Ale is a remote and rarely visited volcano that is known currently to have an active lava lake in its summit crater. Erta Ale has undergone seven eruption events in the past 125 years.
Re: What are the differences between Signal ground, Chasis ground and Earth?? Signal Ground is a reference point from which that signal is measured, due to the inevitable voltage drops when current flows within a circuit, some 'ground' points will be slightly different to others. There may be several signal grounds in a circuit.
According to an exemplary embodiment of the invention, physical layer parameters of a field bus signal are determined by a filling level measuring device, a pressure measuring device or a flow measuring device. Based on the determined physical layer parameters a status report is transmitted to an external device. No external diagnosis tool is necessary. According to an exemplary embodiment of the invention, physical layer parameters of a field bus signal are determined by a filling level measuring device, a pressure measuring device or a flow measuring device.