Depending on the system setup, a Realflo-enabled SCADAPack controller can provide one of several industry standard gas flow calculations:
- AGA-3 (1985)—Gas volume calculated using a pre-1992 orifice meter
- AGA-3 (1992)—Gas volume calculated using a pre-2013 orifice meter
- AGA-3 (2013)—Gas volume calculated using an orifice meter (supported by Realflo version 6.95 onwards)
- AGA-7—Gas volume calculated using a turbine meter
- AGA-11—Gas volume calculated using a Coriolis meter (supported by Realflo version 6.95 onwards)
- V-Cone—Gas volume calculated using a V-Cone gas flow meter.
The type of calculation that a Gas Flow Run performs is read into Geo SCADA Expert when the server establishes communications with the controller on which the Flow Run is located. You can also specify the calculation Type manually, if required. For instance, if a Flow Run’s data is to be used on report(s), and you want to configure those reports to include the relevant data fields, before Geo SCADA Expert establishes communications with the controller on which the Flow Run is located.
The Type field at the top of the Flow Calculation tab indicates the type of flow calculation that a flow run performs.
The type of calculation that a Gas Flow Run performs, determines the fields that are displayed on the rest of the tab.
If the Flow Calculation Type is AGA-3, the tab displays fields that show:
Depending on the type of AGA-3 calculation and orifice meter, a further set of properties might also be displayed:
If the Flow Calculation Type is AGA-7, the tab displays fields that show:
If the Flow Calculation Type is AGA-11, the tab displays fields that show:
If the Flow Calculation Type is V-Cone, the tab displays fields that show:
- AGA-3 or V-Cone Differential Pressure Properties
- V-Cone General Properties
- V-Cone Flow Coefficient Properties.
Further Information
For more detailed information on these properties, see the documentation provided with the Realflo application.