virtual meter

A virtual meter is not a physical meter, but rather is an aggregation or subtraction of two or more meter readings to define a meter for an area. A virtual meter is assigned to a measurement scope site, building, floor or zone), and then lists meters to include or to exclude.

For example, meters could be installed on each floor of a building. A virtual meter could sum the values of all of these meters and present the result as a building total.

Or, a meter could exist for an entire building and a single separate meter could exist for one subsection of that building. You could define a virtual meter to represent the space for the entire building excluding that metered subsection. That virtual meter would consist of the total building readings minus the meter readings for the subsection of the building.