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156 AGA 8 Setup page
Section 5: Startup and meter configuration Reference, Installation, and Operations Manual
June 2013 3-9000-743 Rev S
1. From the Field Setup Wizard - AGA 8 Page, choose the desired settings:
• AGA8 calculations to be performed:
— Internally (by meter)
— Base temperature
— Base pressure
— Base absolute pressure
— Externally
— Fixed
— Live
Table 5-20 Field Setup Wizard - AGA 8 Setup
AGA8 method Configuration Parameters
Gross Method 1 Specific gravity: Relative density; used as input to the AGA8 Gross Methods 1 and 2 calculations
• Reference temperature - for the specific gravity
• Reference pressure - for specific gravity
• CO2 - Mole percentage CO2 in the natural gas mixture
• Hydrogen - Mole percentage of hydrogen
• CO - Mole percentage of carbon monoxide
Volumetric gross heating
• Molar density ref temperature: Reference temperature for the molar density; used as
input to the AGA8 Gross Method 1 calculation
• Molar density ref pressure: Reference pressure for the molar density; used as input to the
AGA8 Gross Method 1 calculation
Gross Method 2 Specific gravity: Relative density; used as input to the AGA8 Gross Methods 1 and 2 calculations
• Reference temperature - for the specific gravity
• Reference pressure - for the specific gravity
• CO2 - Mole percentage CO2 in the natural gas mixture
• Hydrogen - Mole percentage of hydrogen
• CO - Mole percentage of carbon monoxide
• Nitrogen - Mole percentage of nitrogen in the natural gas mixture (AGA8 Gross Method 2
calculation)
AGA8 method Configuration Parameters
Detail Enter the amount of each of the 21 gas components as a percentage.
This option is only available in Mark III meters
• Gas composition - Select either the Fixed or Live GC.
– Fixed: Select this option to use the fixed gas composition stored in the meter for all
calculations for which they are required.
– Live GC: Select this option to use a gas composition collected by the meter from a
gas chromatograph for all calculations for which they are required. This option is
only available for Mark III meters with a valid GCKey
Externally
• Select if AGA8 calculations are done externally. The calculated values must then be
written to the meter using Daniel MeterLink or a flow computer. The following properties
must be entered. If a flow computer or SCADA system is used to write these values to the
meter, they do not have to be entered at this time.
– Flow mass density
– Flow compressibility
– Base compressibility
Note: Mark II meters - Externally calculating the AGA8 calculations is only available for DFI boards running version 3.40 or later
firmware.