ABB EQmatic Product Manual page 50

ABB EQmatic
Commissioning
Difference
A difference meter is a mathematical meter. No physical meters can be assigned to a difference
meter. It calculates the difference between a higher-level node and one or more lower-level nodes.
It is only shown if a structure has a metering point (higher-level node) with one or more lower-level
metering points as well as physical meters assigned to the metering points. It is enabled via the Edit
sub-menu. Once enabled, the node is shown in the Analytics menu in the structure added, and is
available for the analysis function with its calculated data.
Example (see graphic/screenshot):
Difference 1.1.3 = 1.1 - (1.2 + 1.3)
This symbol indicates which meter for a particular medium is assigned to the node.
If the symbol is light gray, there is a medium assigned to the node, but no physical meter as yet.
If the symbol is dark gray, there is no physical meter assigned to the node as yet.
Electricity
Water
Gas
Heat
Medium
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