Abstract: A method for operating a magnetic-inductive flowmeter includes: recording an electrode signal of an electrode voltage during a magnetic field alignment as measurement data; low-pass filtering the measurement data so that a first low-pass filtered evaluation signal is present; determining a first flow parameter from the low-pass filtered evaluation signal, which is compared with a first limit value; high-pass filtering the measurement data so that a high-pass filtered evaluation signal is present; determining a second flow parameter from the high-pass filtered evaluation signal, which is compared with a second limit value; separately subjecting the low-pass-filtered evaluation signal and the high-pass-filtered evaluation signal to a same evaluation; and assigning a two-phase flow to the flowing medium if at least one of: (i) the first flow parameter exceeds the first limit value; and (ii) the second flow parameter exceeds the second limit value. A related flowmeter is also disclosed.

Abstract: A variable velocity calibration and balancing system having a basis in a function block engine. It pertains to variable air volume systems and particularly to balancing systems as they relate to heating, ventilation and air conditioning (HVAC) systems. Balancing may be addressed using functional blocks to represent actual control and connections in an HVAC application for a variable air volume application.