The fields within this section of the Flow Calculation tab display properties associated with the AGA-3 calculation Deadbands.
You can configure these properties directly in Geo SCADA Expert, or read the configuration into the Geo SCADA Expert database (see Configure or Read the Flow Run Configuration).
- Temperature Deadband—This allows you to define the tolerated change in the flowing temperature before temperature dependent factors in the flow calculation are recalculated. Changes in the temperature smaller than the deadband will be ignored in determining the result. The default value is 0. The upper limit is 7°F or 4°C.
- Static Pressure Deadband—This allows you to define the tolerated changes in the static pressure before static pressure dependent factors in the flow calculation are recalculated. Changes in the static pressure smaller than the deadband will be ignored in determining the result. A static pressure deadband setting of up to four per cent of the typical static pressure level should have a small effect on the accuracy of the AGA-3 calculation. The default value is 0. The upper limit is 800 psi or 5500 kPa or equivalent in other units.
- Differential Pressure Deadband—This allows you to define the tolerated changes in the differential pressure before differential pressure dependent factors in the flow calculation are recalculated. Changes in the differential pressure smaller than the deadband will be ignored in determining the result. A change of N in the differential pressure input will cause a change of 0.5 N in the calculation volume at base conditions. It is recommended that the differential pressure deadband be set to zero. The default value is 0. The upper limit is 4.5 inWC or 1.1 kPa or equivalent in other units.
Further Information
For more detailed information on these properties, see the documentation provided with the Realflo application.