Emerson Rosemount 700XA Reference Manual page 5

July 2020
WARNING
HAZARDOUS AREA EXPLOSION HAZARD
Failure to follow this warning may result in injury or death to personnel.
Do not use a personal computer (PC) or printer in a hazardous area.
Emerson provides serial and Ethernet communication links to connect the analyzer to the PC and to connect to other
computers and printers in a safe area.
Sample conditioning system (SCS)
The optional sample conditioning system is located between the process stream and the sample inlet, which is often mounted
below the gas chromatograph (GC).
The standard SCS configuration includes a stream switching system and filters.
Functional description
A sample probe installed in the process line takes a sample of the gas to be analyzed from the process stream. The sample passes
through a sample line to the sample conditioning system (SCS) where it is filtered or otherwise conditioned. After conditioning, the
sample flows to the analyzer assembly for separation and detection of the gas components.
Figure 1: Gas Chromatography Process Model
A. Process line
B. Probe
C. Sample system
D. Chromatograph oven
E. Gas chromatograph (GC) controller
F. Sample return
G. Slip stream
H. Carrier gas
I. Reference vent
J. Detector vent
K. Analysis results
Separation and analysis
The GC separtes the sample gas into its components as follows:
Rosemount 700XA 5