Emerson Rosemount 700XA Reference Manual page 96

Installation and start-up
June 2022
6. Repeat the procedure with sample gas and stream gas.
4.5.2 Plugged lines, columns, and valves
If the lines, columns, or valves are plugged, check the gas flow at valve ports.
For a reference, use the flow diagram in the drawing package that shipped with your gas
chromatograph (GC), and remember these points about flow diagrams:
• Port-to-port flow paths are indicated by solid or dashed lines on the valve symbol in the
drawing.
• A dashed line indicates flow direction when the valve is On or energized.
A solid line indicates flow direction when the valve is Off or not energized.
•
4.5.3 Purge carrier gas lines
Prerequisites
Purging carrier and calibration gas lines requires power and a personal computer (PC)
connected to the gas chromatograph (GC).
Procedure
1. Ensure that the vent line plugs have been removed and the vent lines are open.
2. Ensure that the carrier gas bottle valve is open.
3. Set the GC side of the carrier gas to 115 psig (7.93 barg).
4. Turn on the GC and the PC.
5. Start Rosemount MON2020 and connect to the GC.
96
Leave the metering valve shut for now; you will reopen it later during initial purging
and the analyzer's first calibration.
Note
Do not use a liquid leak detector, such as Snoop
the oven.
Note
Refer to the Flow Configuration schematic in the documentation packet that
shipped with the GC for detailed instructions on plugging the flame ionization
detector (FID) and flame photometric detector (FPD) vents.
NOTICE
Consult the Rosemount MON2020 Software for Gas Chromatographs Reference
Manual for more information.
Reference Manual
2-3-9000-744
®
, on the valves or components in
Emerson.com/Rosemount