Quick Start Guide
SK- 07787 , Rev B
Rosemount™ 370XA Gas Chromatograph
Helium to Hydrogen Gas Conversion Kit
March 2020
Safety and information notices
DANGER
WILL CAUSE DEATH
Failure to follow this warning will result in death or serious injury to personnel.
WARNING
DANGER TO PERSONNEL
Failure to follow this warning may result in serious injury to personnel.
WARNING
SAFETY COMPLIANCE
Repairs or alterations are not permitted on any flame-proof paths, features, or joints.
Failure to follow this warning may compromise the product’s safety protection method and void the product certification.
NOTICE
Important messages will appear in this format.
2
Quick Start Guide Contents
SK- 07787 March 2020
Contents
Chapter 1 Safety requirements...................................................................................................5
1.1 Rosemount 370XA Hydrogen Conversion Kit Gas Chromatograph safety warnings..................... 5
Chapter 2 Installation.................................................................................................................7
2.1 Installing the Rosemount 370XA helium to hydrogen gas conversion kit..................................... 7
2.2 Installing the carrier shut-off valve............................................................................................... 9
2.3 Purging the carrier gas lines....................................................................................................... 12
2.4 Changing the thermistors.......................................................................................................... 13
2.5 Adjusting the carrier pressure.................................................................................................... 20
2.6 Configure the valve timing.........................................................................................................24
Chapter 3 Ordering information...............................................................................................27
3.1 Parts list.....................................................................................................................................27
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 3
Contents Quick Start Guide
March 2020 SK- 07787
4 Emerson.com/Rosemount
Quick Start Guide Safety requirements
SK- 07787 March 2020
1 Safety requirements
1.1 Rosemount 370XA Hydrogen Conversion Kit Gas Chromatograph safety warnings
Observe these safety messages for the Rosemount 370XA Hydrogen Conversion Kit Gas
Chromatograph.
WARNING
EXPLOSION HAZARD
Failure to de-energize the analyzer may cause serious injury or death to personnel.
Do not open when energized or when an explosive atmosphere may be present.
Keep cover tight while circuits are live.
WARNING
EXPLOSION/FIRE HAZARD
Failure to observe this warning may cause serious injury or death to personnel.
Do not open when an explosive atmosphere may be present.
Do not open while energized.
Use supply cables or wires suitable for at least 176 °F (80 °C).
WARNING
BURN HAZARD
Internal components may be hot. Failure to allow the GC to cool down may result in injury
to personnel.
Allow the GC to cool down before disassembling any components.
Always wear proper personal protective equipment (PPE) when disassembling the
analyzer.
WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or
misconfiguration of end users’ equipment. This could be intentional or unintentional and
needs to be protected against.
Physical security is an important part of any security program and fundamental to
protecting your system. Restrict physical access by unauthorized personnel to protect end
users’ assets. This is true for all systems used within the facility.
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 5
Safety requirements Quick Start Guide
March 2020 SK- 07787
6 Emerson.com/Rosemount
Quick Start Guide Installation
SK- 07787 March 2020
2 Installation
2.1 Installing the Rosemount 370XA helium to hydrogen gas conversion kit
These are the instructions to install the hardware for the helium to hydrogen gas
conversion kit for the Rosemount 370XA Hydrogen Conversion Kit Gas Chromatograph.
The installation kit (7A00003) contains the hardware necessary to convert helium to
hydrogen gas for the GC.
WARNING
Explosion Hazard
Before converting carrier gas to hydrogen, review local hazardous area requirements to
ensure compliance.
The procedure to convert the Rosemount 370XA Gas Chromatograph from helium to
hydrogen gas includes:
• Changing the thermistors (2-6-5000-084)
• Adding a carrier shut-off valve (2-4-4000-197)
• Purging the carrier gas
• Adjusting the carrier pressure (MON2000 2-3-9000-522)
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 7
Installation Quick Start Guide
March 2020 SK- 07787
The contents of the kit are listed in Helium Conversion Kit P/N 7A00003, Parts list and are
illustrated in the Table 2-1.
Table 2-1: Hydrogen Conversion Kit Main Components
Carrier shut-off valve Thermistors
P/N 2-4-4000-197
7A0003G02 - Field retrofit kit
P/N 2-5-1611-007
8 Emerson.com/Rosemount
Quick Start Guide Installation
SK- 07787 March 2020
2.2 Installing the carrier shut-off valve
This procedure describes installing the carrier shut-off valve and tubing for hydrogen
applications.
Refer to the Parts List and the following steps to perform this task.
WARNING
Explosion Hazard
Do not use hydrogen for valve actuation.
Procedure
1. Shut off the carrier and actuation gas supply.
2. Wait until the carrier gas pressure gauge reads zero psi.
3. Disconnect the carrier gas tubing from the tee fitting that is connected to the
carrier gas supply.
Figure 2-1: Current Carrier Gas Line Configuration Using Helium
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 9
Installation Quick Start Guide
March 2020 SK- 07787
Note
The tee fitting positioning may vary, but is often found at the inlet of the carrier gas
regulator. A reducer is provided in the kit to make a connection directly from the
carrier gas cylinder to take the tubing size down from ¼-in. to ⅛-in.
4. Mount the carrier shut-off valve to the bracket on the back frame rail.
Figure 2-2: Carrier Gas, Actuation Gas Line, and Shut-off Valve Connections
A. Bracket
B. Carrier shut-off valve
C. Actuation gas connection
D. Tee fitting and actuation gas line, stainless steel, ⅛-in. tubing
5. Connect a ⅛-in. tubing from the tee to the input port of the shut-off valve.
10 Emerson.com/Rosemount
Quick Start Guide Installation
SK- 07787 March 2020
6. Use a ⅛-in. national pipe thread (NPT) to ⅛-in. Swagelok tee fitting to connect the
carrier gas line located at the top port of the shut-off valve.
Figure 2-3: Carrier and Actuation Gas Tubing Connections
A. Carrier gas tubing input to shut-off valve
B. Actuation gas tubing input to carrier shut-off valve
7. Connect a piece of ⅛-in. tubing from the actuation port of the shut-off valve to the
⅛-in. bulkhead fitting.
8. Connect the actuation line (N2) to the ⅛-in. input port.
9. Ensure that all tube fittings are properly connected. Then label the new actuation
gas inlet and reconnect gases to their appropriate entries.
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 11
Installation
March 2020 SK- 07787
Quick Start Guide
2.3 Purging the carrier gas lines
Use this procedure to purge the gas chromatograph's gas lines.
Refer to Figure 2-4.
Procedure
1. Close all valves and tighten all fittings.
2. Run tubing to the GC, but do not connect.
3. Back off pressure regulator (turn counterclockwise) fully.
Refer to Figure 2-4 to complete Step 4 through Step 12.
Figure 2-4: Carrier Gas Valve Configuration
4. Open cylinder valve for Carrier Cylinder 1.
The pressure indicator will read the cylinder pressure.
5. Open the shut-off valve attached to the carrier regulator.
6. Regulate pressure out of the cylinder to 20 psig; then close the cylinder valve.
7. Open V-1 (bleed valve) and let the carrier gas bleed to atmosphere until both
gauges read 0 psig and then close V-1.
8. Repeat Step 4 and Step 5 twice to purge the line to V-2.
9. Purge the line to V-3 by repeating Step 2 through Step 6, but this time, use bleed
valve V-4 and Carrier Cylinder 2.
12 Emerson.com/Rosemount
Quick Start Guide Installation
SK- 07787 March 2020
10. With valves 1-4 closed, open both cylinder valves and regulate both carriers to
approximately 10 psig.
11. Open V-2 and V-3 simultaneously; then turn both cylinder valves off and let the
carrier gases bleed through the line to the GC until all gauges read 0 psig.
12. Repeat Step 8 and Step 9 twice to purge the line to the GC.
13. Leak check all the fittings carefully.
14. Let the GC run overnight before calibrating.
2.4 Changing the thermistors
Use this procedure to remove the helium thermistors and install the hydrogen compatible
thermistors.
WARNING
EXPLOSION HAZARD
Failure to observe this warning may cause death or serious injury to personnel.
Hydrogen is potentially explosive. Use extreme caution when using hydrogen as the
gas chromatograph's carrier gas.
To prevent ignition of hazardous atmospheres, disconnect from supply circuit before
opening the enclosure. Keep tightly closed when circuits are alive. For division
installations using a conduit, a sealing device must be connected within 18 in. (460
mm).
2.4.1 Removing the thermistors
Use this procedure to remove the helium thermistors.
Procedure
1. Turn off power to the gas chromatograph.
2. Remove the dome cover (P/N 7P00057H01).
3. Remove the upper enclosure insulation cover (P/N 7A00058G01).
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 13
Installation Quick Start Guide
March 2020 SK- 07787
4. Lift the analytical heater assembly (P/N 7A00005G01) and allow it to hang by the
heater strap.
Figure 2-5: Removing the Dome Cover, Insulation Cover, and Heater Assembly
A. Dome cover
B. Insulation cover
C. Analytical module heater assembly
14 Emerson.com/Rosemount
Quick Start Guide Installation
SK- 07787 March 2020
5. Remove the O-Ring from the valve mounting plate groove.
Figure 2-6: Mounting Plate Slot
A. O-Ring
B. Valve mounting plate slot
See Figure 2-7 and Figure 2-8 for Step 5 through Step 12.
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 15
Installation Quick Start Guide
March 2020 SK- 07787
6. Remove the columns.
Figure 2-7: Removing the Columns and Disconnecting the Thermistor Wires
A. Columns
B. Thermistor wiring sensor harness screws
7. Remove the heat pipes spring block.
8. Remove the two heat pipe springs.
9. Remove the two heat pipe bracket screws from the TCD block.
10. Use a standard flathead or a Phillips screwdriver and loosen the four thermistor
wiring screws in the sensor harness.
11. Remove the two ⅜-in. thermistor nuts.
16 Emerson.com/Rosemount
Quick Start Guide Installation
SK- 07787 March 2020
12. Remove the thermistors and the PTFE seals (P/N 2-6-5000-084) from the detector
block.
Figure 2-8: Thermistor disassembly
A. Heat pipe bracket
B. Heat pipe spring block
C. Heat pipe springs
D. Thermistors
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 17
Installation
March 2020 SK- 07787
Quick Start Guide
2.4.2 Installing the hydrogen thermistors
Use this procedure to install the hydrogen thermistors.
Figure 2-9: Thermistor disassembly
A. Heat pipe bracket
B. Heat pipe spring block
C. Heat pipe springs
D. Thermistors
Procedure
1. Replace the thermistor seals and the thermistors (P/N 2-5-1611-007) that shipped
with the retrofit kit.
2. Thread the thermistors through the two ⅜-in. thermistor nuts and tighten the nuts.
Using the proper wrench, apply 20 ft.-lb. of torque.
3. Attach the thermistors into the sensor harness connector and tighten the four
screws.
4. Reinstall the two heat pipe bracket screws into the TCD block.
5. Reinstall the two heat pipe springs.
6. Reinstall the heat pipes spring block.
7. Reinstall the columns.
18 Emerson.com/Rosemount
Quick Start Guide Installation
SK- 07787 March 2020
8. Make sure all of the wires are not pinched and are in the mounting plate slot. See
Figure 2-10.
9. Install the O-Ring (P/N 7C00030-366) over the columns and wires and fit into the
valve mounting plate groove.
Figure 2-10: Mounting Plate Slot
A. O-Ring
B. Valve mounting plate slot
10. Reinstall the heater insulation cover.
11. Reinstall the dome cover and ensure it is tightly sealed.
12. Turn on the gas chromatograph power.
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 19
Installation Quick Start Guide
March 2020 SK- 07787
2.5 Adjusting the carrier pressure
This section describes the manual carrier pressure adjustment after performing the helium
to hydrogen gas conversion.
Procedure
1. Adjust the carrier pressure to approximately half of what it was with the helium.
2. Make a single run with calibration gas and see how close the chromatogram is when
compared to the chromatogram with helium. If it is too fast, reduce the carrier
pressure. If it is too slow, increase the carrier pressure.
3. Continue to make single runs and adjust the carrier pressure until it looks close to
what it was with the helium carrier.
4. If necessary, make any required valve timing changes to bring the GC back to full
function.
Use the following guide to help in valve adjustments. The guide is specific to C6+
BTU analysis, backflush to measure, dual column arrangement, but can be used for
any valve timing adjustments required using the appropriate valve and component.
20 Emerson.com/Rosemount
Quick Start Guide Installation
SK- 07787 March 2020
Figure 2-11: Backflush Valve Timing
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 21
Installation Quick Start Guide
March 2020 SK- 07787
Table 2-2: Example Backflush Valve Timing
PA Old
RT BF TIME PA n-Pentane % Change
219 20 76822312
219 21 82954542 7.982355439
219 22 85914053 3.567629847
219 24 88965346 3.551564492
219 25 92305383 3.754312381
219 26 93208291 0.978174805
219 27 94027248 0.878631065
219 28 93370502 0.698463492
219 29 94646236 1.36631374
22 Emerson.com/Rosemount
Quick Start Guide Installation
SK- 07787 March 2020
Figure 2-12: Dual Column Valve Timing
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 23
Installation Quick Start Guide
March 2020 SK- 07787
Table 2-3: Example Dual Column Valve Timing
BF TIME PA C3 PA C2 % Change
38 7.62+E08 5.60E+08 N/A
39 8.399+08 6.32E+08 12.85714
40 8.129+E08 6.70E+08 6.012658
41 N/A 6.87E+08 2.537313
42 N/A 6.95E+08 1.164483
43 N/A 6.98E+08 0.431655
44 N/A 7.01E+08 0.429799
5. Input the proper retention times into the Component Data Table.
6. Run forced calibration.
Postrequisites
After performing the manual carrier pressure adjustment, run MON2020 to Configure the
valve timing.
Important
Only make adjustments to the values at the direction of an Emerson Customer Care
technician.
2.6 Configure the valve timing
Use this feature to set and adjust the valve timing.
Note
Auto valve timing is only available with the Rosemount™ 370XA Gas Chromatograph.
The function of valve timing is to switch the analytical flow path after the peak of a lighter
component has left a column, but before the next component comes out. The first image
below shows the valve timing occurring in-between the C6+ and n-Pentane peaks
correctly on a standard 4-minute C6+ application. The second image shows what happens
when the valve timing is too early and cuts off some of the first peak. The third image
shows what happens when the valve timing is too late and cuts of some of the second
peak. In the last two examples, not all of the component will reach the detector at the
expected time, and therefore will not be measured correctly.
Table 2-4: The effect of valve timing on component leaks.
Correct timing Early valve timing error Late valve timing error
24 Emerson.com/Rosemount
Quick Start Guide Installation
SK- 07787 March 2020
Historically, a technician monitors the peak areas of the two affected peaks while making
changes to the valve timing, and determine the correct timing using personal judgment.
The intention of the auto valve timing (AVT) process is to automatically make the
adjustments and monitor the peak areas to determine the correct valve timing
automatically, reducing the load on the technician to just selecting when to initiate the
AVT process.
The AVT is a process that runs on the calibration gas stream. The process consists of the
following activities:
• Correctly identify all the component peaks.
• Adjust the timed events based on peak retention times.
• Automatically adjust the valve time.
• Run a calibration cycle after the adjustments have been made.
• Check the range and order of response factors.
Procedure
1. Select Control → Auto Valve Timing to open the Start Auto Valve Timing dialog.
2. If you are installing a new module, select the Factory Defaults checkbox;
otherwise, select the Use Current checkbox.
3. Click OK.
The AVT process will run. When it completes, it will generate and display an Auto
Valve Timing report.
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 25
Installation Quick Start Guide
March 2020 SK- 07787
Figure 2-13: Auto Valve Timing sample report
26 Emerson.com/Rosemount
Quick Start Guide Ordering information
SK- 07787 March 2020
3 Ordering information
3.1 Parts list
Part number Description Required Units
2-6-5000-084 Seal, thermistor PTFE 2 EA
2-5-1611-007 Thermistor matched
pair 9K double dipped
(GOWMAC
instruments only)
2-6-5000-487 Tubing, 1/8 in.
ODX .085 ID
9C00012-008 SHCS, M4X0.7X8MM,
18-8 SST
7C00129-001 Fitting, Tee, 1/8" Tube,
Swagelok SS-200-3
2-4-5000-395
2-4-9500-012 Connector, male 1/8 T
7P00214H01 Bracket, hydrogen
2-4-4000-197 Valve, carrier shut-off 1 EA
7A00003G02 Kit, hydrogen shut-off
(1) The reducer is provided if a ¼-in. direct connection from the carrier gas cylinder to the ⅛-in. tee
fitting is configured.
(1)
Reducer 1/4 T X 1/8 SS 1 EA
X 1/8 NPT SS,
SS-200-1-2
shut-off valve, 370XA
valve, 370XA, field
retrofit
1 EA
4 FT
4 EA
1 EA
1 EA
1 EA
1 EA
Rosemount 370XA Gas Chromatograph Helium to Hydrogen Gas Conversion Kit 27
SK- 07787
Rev. B
2020
AMERICAS
Emerson Automation Solutions
10241 West Little York, Suite 200
Houston, TX 77040 USA
Toll Free 866 422 3683
+1 713 396 8880 (North America)
+1 713 396 8759 (Latin America)
+1 713 466 8175
gc.csc@emerson.com
EUROPE
Emerson
Neuhofstrasse 19a PO Box 1046
CH-6340 Baar
Switzerland
+41 (0) 41 768 6111
+41 (0) 41 768 6300
gc.csc@emerson.com
Linkedin.com/company/Emerson-Automation-Solutions
twitter.com/rosemount_news
Facebook.com/Rosemount
youtube.com/RosemountMeasurement
MIDDLE EAST AND AFRICA
Emerson
Emerson FZE
Jebel Ali Free Zone
Dubai, United Arab Emirates, P.O. Box 17033
+971 4 811 8100
+971 4 886 5465
gc.csc@emerson.com
©
2020 Emerson. All rights reserved.
The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount is a
mark of one of the Emerson family of companies. All other marks are the property of their
respective owners.
ASIA-PACIFIC
Emerson
1 Pandan Crescent
Singapore 128461
Republic of Singapore
+65 6 777 8211
+65 6 777 0947
gc.csc@emerson.com
Loading...