Fisher-Rosemount 3095FT, Руководство пользователя

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4-17
Using the Model 3095FT User Interface Software
Configuration
Flow
Gas Properties (CO2)
The displayed gas properties screen is determined by the calculation
method selected in the Flow Parameters screen. If “AGA8 Gr-Hv-CO2”
is selected, then the Gross Characterization Method, Option 1, is
displayed (Figure 4-6a). The Option 1 method requires the entry of real
gas specific gravity, heating value, and CO2 mole percent, and also
allows entry of H2 mole percent and CO mole percent. H2 and CO are
typically zero for natural gas applications.
The valid ranges for the Gas Properties (CO2) screen selections are:
Real gas relative density (specific gravity) at base conditions
0.554000–0.900000.
Volumetric Gross Dry Heating Value at base conditions.
477–1200 BTU/SCF.
CO2 (carbon dioxide) mole percent
0–30 percent.
H2 (hydrogen) mole percent
0–10 percent.
CO (carbon monoxide) mole percent
0–3 percent.
If base conditions changed (Base Pressure
≠
14.73 or Base Temperature
≠
60 °F), then a second screen for modifying relative density at standard
conditions is displayed (Figure 4-6b).
30
95-
309
50
002
309
5-
309
500
52
FIGURE 4-6b. Gas Properties
Screen (AGA8 Gr-Hv-CO2).