Section 6: Meter operation

Reference, Installation, and Operations Manual

June 2013

3-9000-743 Rev S

 

 

The fixed gas component data points map directly to the corresponding “In-Use” gas component data points. The GC-reported gas component data points map directly to the corresponding “In-Use” gas component data points except for the C6PlusGC and

NeoPentaneGC components. The C6PlusGC quantity is divided among the NHexaneInUse,

NHeptaneInUse, and NOctaneInUse data points according to the component ID (C6PlusGCComponentID) as listed in Table 6-10below:

Table 6-10 C6+ breakdown to standard components by component ID
C6+ Component IDPercentage to

Percentage to

Percentage to

(C6PlusGCComponentID)

NHexaneInUse

NHeptaneInUseNOctaneInUse

108

47.466

35.340

17.194

109

50.000

50.000

0.000

 

 

 

 

110

60.000

30.000

10.000

 

 

 

 

111

57.143

28.572

14.285

 

 

 

 

For example, if the C6PlusGC mole percentage is 1% and its component ID is 110, then 60% of the C6+ mole percentage (0.60x1%=0.60%) is added to NHexaneInUse, 30% (0.30x1%=0.30%) is added to NHeptaneInUse, and 10% (0.10x1%=0.10%) is added to NOctaneInUse.

The GC-reported NeoPentane component (NeoPentaneGC) quantity is added to theIsoPentane component (IsoPentaneInUse).

The validity of the “In-Use” gas property data is readable via the AreGasPropertiesInvalidInUse data point where TRUE(1) indicates invalid data and FALSE(0) indicates valid data. The validity of the “In-Use” gas property data is a function of the validity of the selected source data. If the source data is selected as Fixed, then the “In-Use” gas property data is valid (since the fixed data is assumed to be valid). If the source data is selected as Live - GC, then the “In-Use” gas property data is valid only if the GC-read gas property data is valid.

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Gas properties