Valve
Carrier gas cylinder
Valve description
V-1
Carrier Cylinder 1
Bleed valve
V-2
Carrier Cylinder 1
Block valve
V-3
Carrier Cylinder 2
Block valve
V-4
Carrier Cylinder 2
Bleed valve
B.2
Install manifold and purge line
To install and purge the dual-bottle carrier gas manifold, proceed as follows:
Procedure
1. Install manifold as shown in
. Close all valves and tighten all fittings. Run
tubing to the gas chromatograph (GC), but do not connect.
2. Back off pressure regulator (counter clockwise) fully.
3. Open cylinder valve for Carrier Cylinder 1.
The pressure indicator will read the cylinder pressure.
4. Open the shut-off valve attached to the carrier regulator.
5. Regulate pressure out of the cylinder to 20 psig (137.9 kPa); then close the cylinder
valve.
6. Open V-1 (bleed valve) and let the carrier gas bleed to atmosphere until both
gauges read 0 psig; then close V-1.
7. Repeat
twice to purge the line to V-2.
8. Purge the line to V-3 by repeating
through
; but this time, use bleed
valve V-4 and Carrier Cylinder 2.
9. With valves 1-4 closed, open both cylinder valves and regulate both carriers to
approximately 10 psig (68.9 kPa).
10. Open V-2 and V-3 simultaneously; then turn both cylinder valves off and let the
carrier gasses bleed through the line to the GC until all gauges read 0 psig.
11. Repeat
twice to purge the line to the GC.
12. Close V-3; leave V-2 open.
13. Open the cylinder valve of Carrier Cylinder 1 and, with carrier gas flowing at 10 psig
(68.9 kPa) or below, connect the carrier line to the GC.
14. Slowly regulate Carrier Cylinder 1 to 110 psig (6.9 to 758.4 kPa).
15. Open V-3 and slowly regulate Carrier Cylinder 2 to 100 psig (689.4 kPa).
By doing this, all but 100 pounds of Carrier Cylinder 1 will be used before any of
Carrier Cylinder 2 is used. When Carrier Cylinder 1 gets to 100 pounds, replace the
cylinder.
16. Leak-check all of the fittings carefully.
17. Let the GC run overnight before calibrating.
Carrier gas installation and maintenance
Reference Manual
June 2022
2-3-9000-744
264
Emerson.com/Rosemount
Summary of Contents for Rosemount 700XA
Page 1: ...Reference Manual 2 3 9000 744 Rev L June 2022 Rosemount 700XA Gas Chromatograph ...
Page 6: ...TxD TD or Sout Transmit data or signal out 6 ...
Page 30: ...Overview Reference Manual June 2022 2 3 9000 744 30 Emerson com Rosemount ...
Page 100: ...Installation and start up Reference Manual June 2022 2 3 9000 744 100 Emerson com Rosemount ...
Page 182: ...Operation and maintenance Reference Manual June 2022 2 3 9000 744 182 Emerson com Rosemount ...
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