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–33
Analysis Data
Default
Value
Units
NX19 Fixed
Ft/Fp AGA-8 1992
Detail All
Others
7
Helium 0.0000 mol % No Yes No
Hydrogen 0.0000 mol % No Yes No
iButane 0.0000 mol % No Yes No
iPentane 0.0000 mol % No Yes No
Methane 100.000 mol % No Yes Yes
nButane 0.0000 mol % No Yes No
nDecane 0.0000 mol % No Yes No
nHeptane 0.0000 mol % No Yes No
nHexane 0.0000 mol % No Yes No
nitrogen N2 0.0000 mol % Yes Yes Yes
nNonane 0.0000 mol % No Yes No
nOctane 0.0000 mol % No Yes No
nPentane 0.0000 mol % No Yes No
Oxygen 0.0000 mol % No Yes No
Propane 0.0000 mol % No Yes No
Water H2O 0.0000 mol % No Yes No
Specific Gravity 0.6000 N/A Yes Yes Yes
3.6.6 Constants
On a single tube gas orifice meter, there are certain constants or parameters that
may need to be entered or changed from the default values. Table 3
–3 displays
the list of these constants.
Table 3
–3 Gas Orifice Constants
Parameters
Default
Value
Units
AGA-3
1985 AGA-3
1992
AGA-7 ISO-5167
Configurable
Auxiliary Factor (Faux) 1.0 Yes Yes Yes Yes
Barometric Pressure PSIA Yes Yes Yes Yes
DP Zero Cutoff 0.0000 In H2O Yes Yes No Yes
Meter Factor (Fb Basic Orifice
Factor)
210.2300 Yes No No No
Orifice Coefficient of Expansion 9.2500
In per Deg.
F
No Yes No Yes
Orifice Diameter 1.0000 Yes Yes No Yes
Orifice Material Stainless Yes No No No
Pipe Coefficient of Expansion 6.2000
Inches per
Deg. F
No Yes No Yes
Pipe Diameter 2.0670 Yes Yes No Yes
Pressure Base (Contract) 14.7300 PSIA Yes Yes Yes Yes
Specific Heat Ratio 1.3000 Yes Yes No Yes
Tap Location Upstream Yes Yes No Yes