Connect To Actuation Gas - Emerson Rosemount 470XA Manual

Gas chromatograph
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Installation
June 2023
Table 3-1: Carrier gas specifications
Carrier gas
Carrier gas flow
Procedure
1. To ensure the continuous operation of the analyzer, install two high pressure carrier
2. Using a two-stage bottle regulator with stainless steel diaphragms, regulate the
3. Use ⅛-in. stainless steel tubing that is clean and free of grease to connect from the
4. Before making the final connection to the sample system, blow through the external
3.8 

Connect to actuation gas

The analytical valves require actuation gas to operate. When helium is used as a carrier
gas, the default configuration is to also use helium as the actuation gas.
Table 3-2: Actuation gas specifications
Moisture content
Particulate
Supply pressure
38
gas cylinders and connect them to the gas chromatograph (GC) through a manifold
arrangement that permits the replacement of empty cylinders without disrupting
the operation of the analyzer.
The manifold arrangement can be a manual valve arrangement or a commercially
available auto switch-over dual regulator assembly.
carrier gas from the bottle pressure.
 WARNING
High pressures may damage the analyzer and cause an unsafe environment.
If using helium, regulate the carrier gas to 90 psig (6.2 barg).
If using hydrogen, regulate the carrier gas to 30 psig (2.1 barg).
Use a dual-stage regulator to ensure the outlet pressure will not change
with changes in the bottle pressure. Use stainless steel diaphragms to avoid
contaminating the analytical oven.
carrier gas bottle manifold to the side sample panel carrier input fitting.
lines with helium for 30 seconds to remove any contamination, such as water or
metal shavings, from cutting the tube.
NOTICE
Only blow out the external lines on the sample handling system.
Blowing out the interior GC lines may damage equipment.
(continued)
Helium or hydrogen
Approx. 10 cc/min
Less than 10 ppm
Less than 2 microns
90 psig (6.2 barg)
Manual
MS-00809-0100-0470
Emerson.com

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