2 Orientation and planning
Topics covered in this chapter:
•
Functional view of the SGM
•
Terms and definitions
•
Core process variable: Specific gravity, molecular weight, or relative density
•
Equations used to calculate specific gravity, molecular weight, and relative
density
2.1 Functional view of the SGM
SGM components view
The following figure illustrates the major components of the SGM, the normal
measurement path, and the calibration path. Depending on the order, some components
may be shipped with the device or supplied by the customer. When gas flows through the
meter, the path it takes depends on whether you are purging, filling the reference
chamber, calibrating, or measuring.
Orientation and planning
Configuration and Use Manual 5
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