A flow diagnostic system for a flow sensing element and impulse lines. A pressure
transmitter coupled to the impulse lines provides digital pressure data to a control
system. The control system provides the pressure data and real time clock readings
to a diagnostic application. The diagnostic application calculates a difference
between current pressure data and its moving average. A condition of the primary
element or impulse lines is diagnosed from a current pressure data set relative
to an historical data set. The diagnostic application is downloadable from an application
service provider (ASP). The application can run on the control system, a remote
computer or the ASP. A diagnostic report is preferably provided.
