Emerson Process Management 760004-A User Manual
Instruction Manual
760004-A
February 2002
Model NGA 2000 HFID
Heated Flame Ionization Detector Module
http://www.processanalytic.com
ESSENTIAL INSTRUCTIONS
READ THIS PAGE BEFORE PROCEEDING!
Rosemount Analytical designs, manufactures and tests its products to meet many national and
international standards. Because these instruments are sophisticated technical products, you
MUST properly install, use, and maintain them to ensure they continue to operate within their
normal specifications. The following instructions MUST be adhered to and integrated into your
safety program when installing, using, and maintaining Rosemount Analytical products. Failure to
follow the proper instructions may cause any one of the following situations to occur: Loss of life;
personal injury; property damage; damage to this instrument; and warranty invalidation.
• Read all instructions prior to installing, operating, and servicing the product.
• If you do not understand any of the instructions, contact your Rosemount Analytical repre-
sentative for clarification.
• Follow all warnings, cautions, and instructions marked on and supplied with the product.
• Inform and educate your personnel in the proper installation, operation, and mainte-
nance of the product.
• Install your equipment as specified in the Installation Instructions of the appropriate In-
struction Manual and per applicable local and national codes. Connect all products to the
proper electrical and pressure sources.
• To ensure proper performance, use qualified personnel to install, operate, update, program,
and maintain the product.
• When replacement parts are required, ensure that qualified people use replacement parts
specified by Rosemount. Unauthorized parts and procedures can affect the product’s performance, place the safe operation of your process at risk, and VOID YOUR WARRANTY.
Look-alike substitutions may result in fire, electrical hazards, or improper operation.
• Ensure that all equipment doors are closed and protective covers are in place, except
when maintenance is being performed by qualified persons, to prevent electrical shock
and personal injury.
The information contained in this document is subject to change without notice.
Teflon is a Registered Trademark of E.I. duPont de Nemours and Co., Inc.
Kynar is a Registered Trademark of Atochem North America, Inc.
SNOOP is a registered trademark of NUPRO Co.
Emerson Process Management
Rosemount Analytical Inc.
Process Analytic Division
1201 N. Main St.
Orrville, OH 44667-0901
T (330) 682-9010
F (330) 684-4434
e-mail: gas.csc@EmersonProcess.com
http://www.processanalytic.com
Model NGA 2000 HFID
TABLE OF CONTENTS
PREFACE...........................................................................................................................................1
Definitions ...........................................................................................................................................1
Safety Summary .................................................................................................................................2
General Precautions For Handling And Storing High Pressure Gas Cylinders .................................5
Documentation....................................................................................................................................6
Compliances .......................................................................................................................................6
Glossary of Terms ............................................................................................................................7
1.0 DESCRIPTION AND SPECIFICATIONS..............................................................................1-1
1-1 Overview................................................................................................................................1-1
1-2 Typical Applications...............................................................................................................1-1
1-3 Safety Gas Features..............................................................................................................1-1
1-4 Theory of Technology............................................................................................................1-1
1-5 Specifications ........................................................................................................................1-4
a. General ...........................................................................................................................1-4
b. Physical...........................................................................................................................1-4
c. Gas Requirements ..........................................................................................................1-5
d. Gas Connections.............................................................................................................1-6
Instruction Manual
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February 2002
2.0 INSTALLATION ....................................................................................................................2-1
2-1 Unpacking..............................................................................................................................2-1
2-2 Assembly ...............................................................................................................................2-1
2-3 Location .................................................................................................................................2-1
2-4 Gases ....................................................................................................................................2-1
a. Overview .........................................................................................................................2-1
b. Pneumatic Connections ..................................................................................................2-3
c. Specifications ..................................................................................................................2-3
2-5 Leak Test ...............................................................................................................................2-4
2-6 Electrical Connections ...........................................................................................................2-6
2-7 Installation Considerations Checklist.....................................................................................2-9
3.0 OPERATION .........................................................................................................................3-1
3-1 Overview................................................................................................................................3-1
3-2 Startup Procedure .................................................................................................................3-1
3-3 Binding...................................................................................................................................3-3
3-4 Calibration..............................................................................................................................3-4
3-5 Routine Operation .................................................................................................................3-5
3-6 Safety System........................................................................................................................3-5
4.0 MAINTENANCE AND SERVICE ..........................................................................................4-1
4-1 Overview................................................................................................................................4-1
4-2 Oven ......................................................................................................................................4-3
a. Removal ..........................................................................................................................4-3
b. Disassembly....................................................................................................................4-4
4-3 Burner ....................................................................................................................................4-6
a. Temperature Sensor .......................................................................................................4-6
b. RTD Detector ..................................................................................................................4-6
c. Igniter ..............................................................................................................................4-6
d. Flameout Sensor.............................................................................................................4-6
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Instruction Manual
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February 2002
4-4 Burner Internal Components .................................................................................................4-8
a. Disassembly of Burner/Thermal Block............................................................................4-8
b. Replacing Burner Jets.....................................................................................................4-9
c. Burner Jet Installation .....................................................................................................4-11
4-5 Thermal Block........................................................................................................................4-12
a. Sample RTD....................................................................................................................4-12
b. Cartridge Heater..............................................................................................................4-13
c. Thermostat......................................................................................................................4-13
d. Sample Capillary .............................................................................................................4-13
4-6 Electronics Assembly ............................................................................................................4-14
a. Printed Circuit Boards .....................................................................................................4-15
b. Case Temperature Sensor..............................................................................................4-16
c. Case Pressure Purge Switch..........................................................................................4-17
d. Preamp Assembly...........................................................................................................4-18
4-7 Fan Assembly........................................................................................................................4-19
4-8 Flow Controller ......................................................................................................................4-20
4-9 DC Power Supply Module .....................................................................................................4-22
4-10 Front Panel Components.......................................................................................................4-23
a. LON/Power Module.........................................................................................................4-25
b. LED Indicator Assembly..................................................................................................4-25
c. Manual Ignite Toggle Switch ...........................................................................................4-25
d. Burner Air Sensor............................................................................................................4-25
e. Fuel Sensor.....................................................................................................................4-25
f. Burner Air and Fuel Regulators ......................................................................................4-25
g. Purge Air Regulator ........................................................................................................4-26
h. Purge Air Flow Switch and Diffuser ................................................................................4-26
i. Burner Air Solenoid Valve ...............................................................................................4-26
j. Air Ignite Restrictor..........................................................................................................4-26
4-11 Rear Panel Components .......................................................................................................4-27
a. Fuel In 2-Way Solenoid Valve.........................................................................................4-28
b. Burner Air In Filter ...........................................................................................................4-28
c. Heated Bypass Sample Out and Heated Sample In Restrictors ....................................4-28
d. Regulated Air In Check Valve .........................................................................................4-28
Model NGA 2000 HFID
5.0 TROUBLESHOOTING ..........................................................................................................5-1
5-1 Troubleshooting Checklist .....................................................................................................5-1
a. Safety System .................................................................................................................5-1
b. Ignition.............................................................................................................................5-1
c. Drift..................................................................................................................................5-2
d. Noise ...............................................................................................................................5-2
6.0 REPLACEMENT PARTS ......................................................................................................6-1
6-1 Matrix .....................................................................................................................................6-1
6-2 General..................................................................................................................................6-2
6-3 Pneumatics............................................................................................................................6-2
6-4 Oven Components.................................................................................................................6-3
7.0 RETURN OF MATERIAL ......................................................................................................7-1
7-1 Return Of Material .................................................................................................................7-1
7-2 Customer Service ..................................................................................................................7-1
7-3 Training..................................................................................................................................7-1
8.0 APPENDIX A - MENU DISPLAYS........................................................................................8-1
ii Contents Rosemount Analytical Inc. A Division of Emerson Process Management
Instruction Manual
Model NGA 2000 HFID
LIST OF ILLUSTRATIONS
Figure 1-1. Flame Ionization Detection Technology ...........................................................................1-2
Figure 1-2. Heated Flame Ionization Detector Analyzer Module - Top View....................................1-3
Figure 2-1. Back Panel Connections ..................................................................................................2-2
Figure 2-2. Flow Diagram....................................................................................................................2-5
Figure 2-3. Front Panel Electrical Connections ..................................................................................2-6
Figure 2-4. Front Panel Connections, Controls and Indicators...........................................................2-6
Figure 2-5. HFID Outline and Mounting Dimensions ..........................................................................2-7
Figure 2-6. HFID Wiring Diagram........................................................................................................2-8
Figure 3-1. Typical Curves of Module Response vs. Pressure Setting on Fuel Pressure Regulator..3-7
Figure 3-2. Typical Curves of Module Response vs. Pressure Setting on Air Pressure Regulator.....3-7
Figure 3-3. Front Panel Torque Sequence ..........................................................................................3-8
Figure 4-1. Removal of Cover and Insulation Shield ...........................................................................4-1
Figure 4-2. Locations of Major Assemblies of the HFID ......................................................................4-2
Figure 4-3. Removal of Oven from Chassis.........................................................................................4-3
Figure 4-4. Oven Assembly..................................................................................................................4-5
Figure 4-5. Burner - Sensor, Flameout Detector, RTD Detector and Ignitor .......................................4-7
Figure 4-6. Burner/Thermal Block Disassembly ..................................................................................4-8
Figure 4-7. Burner Disassembly...........................................................................................................4-9
Figure 4-8. Burner Jets ........................................................................................................................4-10
Figure 4-9. Thermal Block – Sample RTD, Cartridge Heater and Thermostat....................................4-12
Figure 4-10. Thermal Block Assembly .................................................................................................4-13
Figure 4-11. Removing Electronics Assembly from Chassis ...............................................................4-14
Figure 4-12. Electronics Assembly – Exploded View...........................................................................4-15
Figure 4-13. Case Sensor Installation..................................................................................................4-16
Figure 4-14. Case Pressure Purge Switch Installation ........................................................................4-17
Figure 4-15. Preamp Assembly Installation .........................................................................................4-18
Figure 4-16. Fan Assembly Installation................................................................................................4-19
Figure 4-17. Flow Controller Replacement ..........................................................................................4-20
Figure 4-18. Flow Controller Assembly................................................................................................4-21
Figure 4-19. DC Power Supply Module Replacement .........................................................................4-22
Figure 4-20. Front Panel – Exploded View ..........................................................................................4-23
Figure 4-21. Accessing Front Panel Components ...............................................................................4-24
Figure 4-22. Rear Panel Components .................................................................................................4-27
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February 2002
LIST OF TABLES
Table 3-1. HFID Analyzer Module Alarms ..................................................................................... 3-8
Rosemount Analytical Inc. A Division of Emerson Process Management Contents iii
Instruction Manual
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February 2002
Model NGA 2000 HFID
iv Contents Rosemount Analytical Inc. A Division of Emerson Process Management
Instruction Manual
Model NGA 2000 HFID
PREFACE
The purpose of this manual is to provide information concerning the components, functions,
installation and maintenance of the NGA 2000 HFID and the System Accessories of the NGA
2000 System.
Some sections may describe equipment not used in your configuration. The user should
become thoroughly familiar with the operation of this module before operating it. Read this
instruction manual completely.
DEFINITIONS
The following definitions apply to DANGERS, WARNINGS, CAUTIONS and NOTES found
throughout this publication.
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February 2002
DANGER .
Highlights the presence of a hazard which will cause severe personal injury, death, or substantial property damage if the warning is ignored.
WARNING .
Highlights an operation or maintenance procedure, practice, condition, statement, etc. If not
strictly observed, could result in injury, death, or long-term health hazards of personnel.
CAUTION.
Highlights an operation or maintenance procedure, practice, condition, statement, etc. If not
strictly observed, could result in damage to or destruction of equipment, or loss of effectiveness.
NOTE
Highlights an essential operating procedure, condition or statement.
Rosemount Analytical Inc. A Division of Emerson Process Management Preface P-1
Instruction Manual
760004-A
February 2002
Model NGA 2000 HFID
SAFETY SUMMARY
If this equipment is used in a manner not specified in these instructions, protective systems may be
impaired.
AUTHORIZED PERSONNEL
To avoid explosion, loss of life, personal injury and damage to this equipment and on-site
property, all personnel authorized to install, operate and service the this equipment should be
thoroughly familiar with and strictly follow the instructions in this manual. SAVE THESE INSTRUCTIONS.
DANGER.
ELECTRICAL SHOCK HAZARD
Operate this equipment only when covers are secured. Servicing requires access to live parts
which can cause death or serious injury. Refer servicing to qualified personnel. For safety
and proper performance, this module must be connected to a properly grounded three-wire
source of electrical power.
WARNING .
POSSIBLE EXPLOSION HAZARD
This equipment is used in the analysis of sample gases which may be flammable, and the
burner fuel used in the ionization process is flammable. A continuous dilution purge system
is factory-installed (in accordance with Standard ANSI/NFPA 496-1993, Chapter 6, and it must
be functional at all times during operation. Do not disable this purge system.
WARNING.
FLAMMABLE SAMPLES
The internal compartment of the oven is vented to the main enclosure by the top and bottom
vents. DO NOT RESTRICT THOSE VENTS.
Consult the factory if flammable samples will be measured.
P-2 Preface Rosemount Analytical Inc. A Division of Emerson Process Management
Instruction Manual
Model NGA 2000 HFID
WARNING.
HIGH TEMPERATURE
This equipment is used in the analysis of sample gases at temperatures of up to 250C. All components and material in contact with the sample, the oven and the burner can reach this temperature
level.
Operate this equipment only when covers are secured. Servicing requires access to "hot" parts
which can cause serious injury. Refer servicing to qualified personnel.
NOTE
This Analyzer Module is completely leak-tested at the factory for gas leakage. The user is responsible for testing for leakage at the inlet and outlet fittings on the rear panel (with a test procedure chosen by the user). The user is also responsible for leak-testing periodically and if any internal
pneumatic components are adjusted or replaced. See leak test instructions in Section 2-5.
WARNING.
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February 2002
PARTS INTEGRITY
Tampering with or unauthorized substitution of components may adversely affect safety of this
product. Use only factory-approved components for repair.
CAUTION.
PURGE AIR REQUIREMENT
This Analyzer Module must be used in conjunction with a device (Control Module or PC Interface)
that can actively monitor network variables related to pressure or flow of the continuous dilution
purge, or the front panel LEDs of the Analyzer Module, as installed, must be visible. The purpose of
this requirement is to maintain adherence to ANSI/NFPA 496 standard which assures the continued
viability of the purge system. Under no circumstances should any pressure or flow indicator be
connected to the PURGE AIR OUT outlet of the Analyzer Module because this may affect the sealing
performance of the module.
CAUTION.
PRESSURIZED GAS
This module requires calibration with a known standard gas. See General Precautions for Handling
and Storing High Pressure Gas Cylinders, page P-5.
Rosemount Analytical Inc. A Division of Emerson Process Management Preface P-3
Instruction Manual
760004-A
February 2002
WARNING.
POSSIBLE EXPLOSION HAZARD
Ensure that all gas connections are made as labeled and are leak free. Improper gas connections
could result in explosion or death.
CAUTION.
OVER-VOLTAGE SPIKING
If this analyzer module is used with a non-Rosemount Analytical power supply, adding Rosemount
Analytical PN 903341 Current Protector in series with the 24V positive power line will prevent overvoltage spiking and resultant fuse blowing when powering up the instrument.
CAUTION .
PRESSURIZED ENCLOSURE
Model NGA 2000 HFID
This enclosure shall not be opened unless the area is known to be free of flammable materials or
unless all devices within have been de-energized.
Area classification for the protected enclosure:
Nonclassified.
Pressurization: Type Z
Temperature Identification Number: T4A
Power shall not be restored after enclosure has been opened (or loss of purge) until enclosure has
been purged for a minimum of 6 (six) minutes at the minimum pressure of 689 hPa (10 psig).
P-4 Preface Rosemount Analytical Inc. A Division of Emerson Process Management
Instruction Manual
Model NGA 2000 HFID
GENERAL PRECAUTIONS FOR HANDLING AND STORING
HIGH PRESSURE GAS CYLINDERS
Edited from selected paragraphs of the Compressed Gas Association's "Handbook of Compressed Gases" published in 1981
Compressed Gas Association
1235 Jefferson Davis Highway
Arlington, Virginia 22202
Used by Permission
1. Never drop cylinders or permit them to strike each other violently.
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February 2002
2. Cylinders may be stored in the open, but in such cases, should be protected against extremes of
weather and, to prevent rusting, from the dampness of the ground. Cylinders should be stored in the
shade when located in areas where extreme temperatures are prevalent.
3. The valve protection cap should be left on each cylinder until it has been secured against a wall or
bench, or placed in a cylinder stand, and is ready to be used.
4. Avoid dragging, rolling, or sliding cylinders, even for a short distance; they should be moved by using
a suitable hand-truck.
5. Never tamper with safety devices in valves or cylinders.
6. Do not store full and empty cylinders together. Serious suckback can occur when an empty cylinder
is attached to a pressurized system.
7. No part of cylinder should be subjected to a temperature higher than 125
never be permitted to come in contact with any part of a compressed gas cylinder.
8. Do not place cylinders where they may become part of an electric circuit. When electric arc welding,
precautions must be taken to prevent striking an arc against the cylinder.
°
F (52°C). A flame should
Rosemount Analytical Inc. A Division of Emerson Process Management Preface P-5
Instruction Manual
9
6
760004-A
February 2002
Model NGA 2000 HFID
DOCUMENTATION
The following NGA 2000 HFID instruction materials are available. Contact Customer Service Center or
the local representative to order.
748414 Instruction Manual (this document)
COMPLIANCES
This product may carry approvals from several certifying agencies, including Factory Mutual and the Canadian Standards Association (which is also an OSHA accredited, Nationally Recognized Testing Laboratory), for use in non-hazardous, indoor locations.
FM
APPROVED
Rosemount Analytical Inc. has satisfied all obligations from the European Legislation to harmonize the
product requirements in Europe.
This product complies with the standard level of NAMUR EMC. Recommendation (May 1993).
NRTL /C
®
97-C219
NAMUR
This product satisfies all obligations of all relevant standards of the EMC framework in Australia and New
Zealand.
N
P-6 Preface Rosemount Analytical Inc. A Division of Emerson Process Management
Instruction Manual
Model NGA 2000 HFID
GLOSSARY OF TERMS
Analyzer Module
The module that contains all sensor/detector components for development of a Primary Variable signal; includes all signal conditioning and temperature control circuitry.
Backplane
The interconnect circuit board which the Controller Board, Power Supply, Analyzer Module power and network cables, I/O Modules and Expansion Modules plug into.
Control Module
The Operator Interface plus the Controller Board.
Controller Board
The computer board that serves as the Network Manager and operates the Display and Keypad.
Distribution Assembly
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February 2002
The Backplane and the card cages that hold I/O and Expansion Modules.
Expansion Module
A circuit board that plugs into the Backplane from the front of the Platform and performs special features
not related to I/O functions.
I/O Module
A circuit board that plugs into the Backplane from the rear of the Platform. Has a connector terminal for
communication with external data acquisition devices and provides an input/output function.
Operator Interface
The Display and Keyboard.
Platform
Any workable collection of the following: Controller Board, Power Supply, Distribution Assembly, Enclosure
and Operator Interface.
Power Supply
Any of a variety of components that provides conditioned power to other NGA 2000 components, from the
Power Supply Board that plugs into the front of the Backplane in a stand-alone instrument to several larger
ones that can power larger collections of modules and components.
Primary Variable
The measured species concentration value from an Analyzer Module.
Secondary Variable
Data placed on the network by a module regarding current status, e.g., sample flow, source voltage and
other diagnostic information.
Rosemount Analytical Inc. A Division of Emerson Process Management Preface P-7
Instruction Manual
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February 2002
Softkeys
The five function softkeys located below the front panel display; they assume the function displayed directly
above each on the display, a function dictated by software.
System
Any collection of Analyzer Module(s), Platform(s), I/O Module(s) and Expansion Module(s).
Model NGA 2000 HFID
P-8 Preface Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
DESCRIPTION AND SPECIFICATIONS
Instruction Manual
760004-A
February 2002
SECTION 1
1-1 OVERVIEW
This manual describes the Heated Flame Ionization Detector (HFID) Analyzer Module of
Rosemount Analytical's NGA 2000 Series of
gas analysis components. See Figure 1-1 and
Figure 1-2.
The HFID Analyzer Module is designed to continuously determine the concentration of hydrocarbons in a flowing gaseous mixture at a
user-selectable temperature setpoint between
93°C and 204°C (200°F and 400°F). The concentration is expressed in ppm or percent of
volume.
The entire HFID Analyzer Module is designed
as a stand-alone module, with gas connections
made from the rear. All electronics relative to
sample detection and conditioning are included
in this module.
1-2 TYPICAL APPLICATIONS
The monitoring of atmospheric air for low-level
hydrocarbon contaminants and determining the
hydrocarbon content of exhaust emissions from
internal combustion engines are examples of
typical applications for the HFID Analyzer Module.
1-3 SAFETY GAS FEATURES
The HFID Analyzer Module is designed with a
factory-installed continuous dilution purge system in accordance with standard ANSI/NFPA
496 - 1993, Chapter 6. Front-panel LEDs indicate that the burner flame is lit and that the
purge system is enabled. In addition, fuel gas is
automatically shut off when a flame-out condition occurs or the safety system is disabled.
The purge system is enabled only if there is
proper purge gas flow in, purge gas pressure,
and internal case pressure, and after five times
the case volume has been exchanged.
All tubing ahead of the burner is rigid metallic tubing assembled with ferrule/nut type
compression fittings. However, should an
internal fuel leak occur, a worst-case leak
would be dissipated below 25% of the LEL
of hydrogen through the combination of an
inlet fuel flow restrictor and purge gas flow.
This module is designed to use 40%
H
2
/60% He fuel at a maximum inlet pres-
sure of 3446 hPa-gauge (50 psig).
A standard HFID Analyzer Module is only
equipped to analyze a non-flammable sample, below 100% of the LEL.
WARNING
POSSIBLE EXPLOSION HAZARD
Protection against explosion depends
upon a special fuel flow restrictor in the
fuel inlet fitting. Do not remove fuel inlet
restrictor. Do not use 100% hydrogen
fuel. Replace only with a factory supplied fitting.
1-4 THEORY OF TECHNOLOGY
This Analyzer Module uses the flame ionization method of detection. The sensor is a
burner in which a regulated flow of sample
gas passes through a flame sustained by
regulated flows of a fuel gas (a hydrogen/diluent mixture) and air.
Within the flame, the hydrocarbon components of the sample stream undergo a complex ionization that produces electrons and
positive ions. Polarized electrodes collect
these ions, causing current to flow through
an electronic measuring circuit.
The ionization current is proportional to the
rate at which carbon atoms enter the
burner, and is therefore a measure of the
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-1
Instruction Manual
g
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February 2002
Model NGA 2000 HFID
concentration of hydrocarbons in the sample.
This measure of concentration is placed on the
+90V
network, where it can be shown on a data
acquisition device.
Negative Ion
Collection Plate
Signal Conditionin
Positive
Carbon
Ions
Sample
Figure 1-1. Flame Ionization Detection Technology
C
Air
Fuel
1-2 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
Gas Lines
(See Figure 2-2)
Fuel Shutoff
Solenoid Valve
Oven
Instruction Manual
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February 2002
Purge Air Outlet
Detector
(Burner)
Preamp Board
(In Shield)
Case Pressure Switch
Air Circulation Fan
Case Heater
Sample Flow
Controller
Purge Air
Flow Switch
Burner Air
Solenoid Valve
Burner Air & Fuel Regulators
(Stacked Vertically)
Computer Board
Sensor Board
Safety Board
DC-DC Module
Power Supply Board
Purge Air
Regulator
Network & Power Module
Figure 1-2. Heated Flame Ionization Detector Analyzer Module - Top View
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-3
Instruction Manual
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February 2002
1-5 SPECIFICATIONS
a. General
Measurement Species ....................Total hydrocarbons
Ranges (H2/He Fuel)
Low range.............................. 0 to 10 ppm, CH4, through 0 to 1%, CH4 at an oven setpoint be-
High range ............................. 0 to 50 ppm, CH
Analysis Temperature .....................Adjustable from 200
Repeatability ....................................≤1% of fullscale for successive identical samples, at a constant
Min. Detectable Level......................0.10 ppm, CH
Noise ................................................≤1% of fullscale, peak to peak
Linearity............................................≤±1% of fullscale, ≤±2% of data point (must be above the minimum
Response Time ...............................≤1.5 sec., 0% to 90% of fullscale
Drift
Zero ....................................... ≤ ±1% of fullscale/24 hours at constant temperature, sample flow,
Span ...................................... ≤ ±1% of fullscale/24 hours at constant temperature, sample flow,
Effect of Temperature.................... ≤±2% of fullscale for any ambient temperature change of 10
Operating Temperature ................. 59°F to 95°F (15°C to 35°C)
Power Requirements.......................+24 VDC ±5%, 120 W max. direct to Analyzer Module
Model NGA 2000 HFID
tween 113°C and 191°C
, through 0 to <5%, CH4 at an oven setpoint be-
4
tween 113°C and 191°C
o
o
F (±6oC) from the setpoint.
±11
temperature, sample flow and fuel, burner air, regulated air and
sample pressures
4
detectable level)
rate of change less than 10
Ripple and Noise: <100 mV pp
Line and Load Regulations: <1%
F to 400oF (93oC to 204oC), maintained within
hydrocarbon concentration of supply gases, and
fuel, burner air, regulated air and sample pressures.
hydrocarbon concentration of supply gases, and
fuel, burner air, regulated air and sample pressures.
o
C/hr.
o
C and
b. Physical
Case Classification........................ General purpose for installation in weather-protected area
Maximum Separation .................... 1600m (1 mile) from Analyzer Module to Platform
Materials in Contact With Sample . Stainless steel and glass-filled Teflon
Dimensions.................................... See Outline and Mounting Dimensions, Figure 2-5
Weight ........................................... 15.9 kg (35 lbs.)
Mounting........................................ Horizontally, custom-installed in a panel
1-4 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
c. Gas Requirements
Sample .......................................... Non-flammable, below 100% of LEL
Flow rate ................................ 1.0 to 2.5 L/min.
Supply pressure..................... 345 to 620 hPa-gauge (5 to 9 psig)
Temperature .......................... 110
Particulates............................ filtered to <2 microns
Dewpoint................................ <15
Regulated Air................................. Instrument air or nitrogen
Flow rate ................................ 2 to 4 L/min.
THC ....................................... ≤2 ppm, CH
Supply pressure..................... 689 to 1723 hPa-gauge (10 to 25 psig)
Particulates............................ filtered to <2 microns
Purge Air:....................................... Instrument air, nitrogen or other nonflammable gas (refer to
Flow rate: .............................. 16 to 18 L/min.
Supply pressure:.................... 689 to 1378 hPa-gauge (10 to 20 psig)
Fuel Gas ........................................ Premixed 40% hydrogen and 60% helium
Flow rate ................................ 80 to 100 ml/min
THC ....................................... ≤0.5 ppm, CH
Supply pressure..................... 3101 to 3446 hPa-gauge (45 to 50 psig)
Instruction Manual
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o
C to 230oC (230oF to 446oF), <20oC variance/24 hours, <10oC
variance/hr.
o
C below the setpoint
4
ANSI/NFPA 496 for the requirements for the Protective Gas System)
4
WARNING
EXPLOSION HAZARD
Do not use pure hydrogen fuel. An explosion resulting in severe personal injury or death could occur.
Burner Air ...................................... Zero-grade air
Flow rate ................................ 350 to 400 mL/min.
THC ....................................... ≤1 ppm, CH
4
Supply pressure..................... 1723 to 3446 hPa-gauge (25 to 50 psig)
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-5
Instruction Manual
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d. Gas Connections
Sample In ...................................... 1/4" O.D. tube fitting, stainless steel
Regulated Air In ...............................1/4" O.D. tube fitting, brass
Burner Air In .....................................1/4" O.D. tube fitting, brass
Fuel In...............................................1/4" O.D. tube fitting, stainless steel
Purge Air In ......................................3/8" O.D. tube fitting, brass
Purge Air Out....................................3/8" O.D. tube fitting, brass
Bypass Out.......................................1/4" O.D. tube fitting, stainless steel
Burner Exhaust Out:...................... 3/8" O.D. tube connection, stainless steel (must slope downward
Burner Exhaust, Bypass Out and Purge Air Out to be vented to atmospheric pressure and to
non-classified location in accordance with ANSI/NFPA-496 guidelines.
o
6
min. from horizontal)
Model NGA 2000 HFID
Pressure Relief Valve ......................See Caution Below
CAUTION
PRESSURE RELIEF VALVE
No connection shall be made to this fitting. If this caution is ignored, damage to the case seals
could occur, and the instrument will not operate properly.
WARNING
HIGH TEMPERATURE
The Sample In, Bypass Out, and Burner Exhaust Out connections can reach temperatures of up to
250°C (480°F). Severe burns could result from touching these connections.
See the Preface section of the Platform Components manual for specifications regarding Platform-related
components and the Preface of the I/O Module manual for specifications regarding I/O (e.g., relay outputs).
1-6 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
Instruction Manual
760004-A
February 2002
SECTION 2
INSTALLATION
2-1 UNPACKING
If the HFID Analyzer Module is received as a
separate unit, carefully examine the shipping
carton and contents for signs of damage. Immediately notify the shipping carrier if the carton
or contents is damaged. Retain the carton and
packing material until all components associated with the Analyzer Module are operational.
2-2 ASSEMBLY
If the Analyzer Module requires assembly with
other components, do so at this time.
Connect the network cable to either the NETWORK 1 or NETWORK 2 connection on the
Analyzer Module. Connect the power cable to
the Analyzer Module front panel and an electrical +24VDC power supply.
2-3 LOCATION
Install the Analyzer Module in a clean,
weather-proofed, non-hazardous, vibration-free
location free from extreme temperature variations. For best results, install the Analyzer Module near the sample stream to minimize sample
transport time.
The cylinders of fuel, air, and calibration
gas(es) and the source of purge and regulated air should be located in an area of
relatively constant ambient temperature.
2-4 GASES
a. Overview
During normal operation, the Analyzer
Module requires fuel and air to maintain the
burner flame as well as suitable standard
gases for calibration and instrument air for
purge requirements. In addition, instrument
air for regulated air in is required to control
the sample pressure at the sample capillary.
Criteria for selection of these gases follow in
Section 2-4c.
After initial startup or after startup following
a prolonged shutdown, the analyzer may
display baseline drift for a considerable period of time, particularly on the most sensitive range. Commonly, the drift is caused by
small amounts of hydrocarbons in the inner
walls of the tubing in both the internal flow
system and the external gas supply system.
Drift results from any factor influencing the
equilibrium of these absorbed hydrocarbons, such as temperature or pressure.
WARNING
INSTALLATION RESTRICTIONS
For safety, the Analyzer Module should be
installed in a non-confined, ventilated space.
Do not block any of the rear panel outlets as
they are part of the safety system.
Operating ambient temperature is 15°C to
35°C, limited to temperature changes of less
than 10°C/hr. Acceptable dew point range is
less than 95% relative humidity, but not in excess of 45°C wet bulb temperature.
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 2-1
Note that this type of drift occurs only when
the flame is burning. If drift occurs when the
flame is extinguished, the electronic circuitry
is at fault. To minimize drift, use clean fuel
and air, keep the analyzer clean, and locate
the gas cylinders in an area of relatively
constant ambient temperature.
The cylinders supplying all gases each
should be equipped with a clean, hydrocarbon-free, two-stage regulator and a shutoff
valve.
All new external gas tubing (except for
PURGE IN/OUT and SAMPLE BYPASS) is
strongly recommended, preferably precleaned, stainless steel, gas chromato-
Instruction Manual
G
760004-A
February 2002
Model NGA 2000 HFID
graph-grade tubing. Thoroughly clean before
use (if a hydrocarbon-based cleaning solvent
such as acetone is used, purge tubing with dry
nitrogen or helium for several minutes before
using.)
Gas line connections are compression fittings.
Do not use pipe thread tape.
Since the oxidation of hydrogen is accompanied
by the formation of water vapor, the Exhaust
tubing always should be slanted downward at
least 6 degrees from horizontal. Otherwise,
water may accumulate in the line, causing back
pressure and noisy readings, or may back up in
the line and flood the burner. Depending on
the percent of water vapor in the sample,
the sample bypass out connection may
have condensation. Proper drainage may
be required.
If the sample is toxic or noxious, or is to be
reclaimed, connect the Bypass outlet to a
suitable disposal system. Do not use any
device that may cause back pressure in the
line.
Purge air and burner air should be supplied
from separate sources.
PURGE
AIR OUT
REGULATE
D
WARNIN
BURNER
AIR IN
PURGE
ATTENTION
Possible electric shock, explosion or toxic gas hazard. See front of module
BURNER
EXHAUST
VENT TO SAFE AREA
SLOPE DOWNWARD 6
MINIMUM
HOT !
ATTENTION
CHAUD !
HEATED
SAMPLE IN
HEATED
SAMPLE
BYPASS OUT
Danger d'electrocution, d'explosion ou d'emanation de gaz
toxique. Se refere aux details inscrits surla face du module.
Figure 2-1. Back Panel Connections
FUEL
IN
MAXIMUM
INPUT
PRESSURE
°
FUEL: 50 psig(3445 hPa)
BURNER AIR: 50 psig (3445 hPa)
SAMPLE: 8 psig (551 hPa)
PURGE AIR: 20 psig (1378 hPa)
REG AIR: 25 psig (1722 hPa)
PRESSURE
RELIEF
VALVE
2-2 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
Instruction Manual
760004-A
February 2002
b. Pneumatic Connections
WARNING
HIGH TEMPERATURES
The Sample In, Sample Bypass Out, and
Burner Exhaust Out gases and fittings can
reach temperatures of up to 250°C. Make
connections to these fittings when the oven
heater is disabled or the module is powered
down.
(See Figure 2-1) Connect inlet and outlet
lines for sample, burner fuel and air, exhaust, bypass, regulated air, and purge to
appropriately labeled fittings on the rear
panel. All connections are 1/4-inch ferrule-type compression fittings except the
PURGE AIR IN and OUT connections,
which are 3/8-inch compression fittings. The
Burner Exhaust is a 3/8-inch connection.
It is recommended that no connection be
made to the PURGE AIR OUT port. If, however, the analyzer's location requires interconnection with a venting system, the 3/8"
O.D. line should be kept as short as possible, and no longer than four feet.
CAUTION
POSSIBLE INSTRUMENT DAMAGE
c. Specifications
Fuel Gas
Standard analysis usually requires
mixed fuel, i.e., 40% ±2%) hydrogen
2/
and 60% helium. H
recommended over H
of better linearity in concentration output. Such blends are supplied by many
gas vendors specifically for this use,
with a guaranteed maximum total hydrocarbon content of 0.5 ppm, measured as methane. This specification
should be used when obtaining these
mixtures.
The fuel restrictor is marked with a
red dot, and the sample capillary is
marked with a red or green dot for
mixed fuel applications.
Burner Air
In order to ensure a low background
signal, burner air should contain less
than 1 ppm maximum total hydrocarbon
content. An alternate source for burner
air and zero gas (see CALIBRATION
GASES below) is a combination diaphragm pump and heated palladium
catalyst. This process continuously removes moderate amounts of hydrocarbons and carbon monoxide from
ambient air.
He mixed fuel is
2/N2
fuel because
NOTE
No connection should be made to the
PRESSURE RELIEF VALVE fitting. Doing so
may cause damage to the instrument.
CAUTION
PURGE AIR REQUIREMENTS
The front panel LEDs of the Analyzer Module, as installed, are not visible, the user
should provide an indicator for the safety
system as per ANSI/NFPA 496 standards.
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 2-3
Purge Air
Instrument quality air or nitrogen is required for the safety purge system.
Regulated Air
Instrument quality air or nitrogen is required. The air should contain less than
2 ppm maximum total hydrocarbon
content.
Calibration Gases
Calibration method and gases depend
on the operating range, and the desired
measurement accuracy. In all methods,
zero and span gases are used, and are
Instruction Manual
760004-A
February 2002
Model NGA 2000 HFID
introduced through the sample inlet at the
rear of the module.
Zero Gas - Analysis is affected by the
background gas of the sample. Therefore, it
is recommended to use zero gas with as
close to the background composition of the
sample as possible. Normally less than 0.5
4
THC as CH
Span Gas - Span gas consists of a specified concentration of methane or other hydrocarbon in a background gas such as
nitrogen. Analysis is affected by the background gas of the sample. Therefore, span
gas containing the same background gas as
the sample is recommended. Then, the
background effect is canceled out.
Sample Gas
Sample gas should be nonflammable (below 100% of the sample's LEL). For high
sensitivity applications requiring background
gas compensation, contact the factory.
is sufficient.
Burner Air Pressure should be : 1725 to 3450 hPa-gauge (25 to 50 psig) for cylinder regulator, 1035 hPa-gauge (15 psig) nominal for internal pressure.
Regulated Air Pressure should be 689 to 1725 hPa-gauge (10 to 25 psig) for cylinder regulator.
Purge Air Pressure should be 689 to 1380 hPa-gauge (10 to 20 psig).
Nominal Internal Case Pressure is
about 0.5 to 1.0 inch of water, and the
pressure relief valve is set at 1/3 psig
(nominal).
CAUTION
OVER PRESSURE DAMAGE
Noncompliance with these specifications, particularly those concerning
purge air, could cause over-pressure
damage to the module.
Flow Rate
Required sample flow rate is 1.0 L/min. to
2.5 L/min. for a supply pressure between 5
and 9 psig. Flow rate for purge gas should
be 16 to 18 L/min. Flow rate for regulated
air should be 2 to 4 L/min.
Pressure/Filtration
Sample Pressure at the SAMPLE inlet should be within the range of 345 to 620 hPa-gauge (5 to 9 psig, 7.0 psig nominal), and internally, should be between 206.7 and 275.6 hPa-gauge (3.0 and 4.0 psig).
Burner Fuel Pressure should be: 3101 to 3450 hPa-gauge (45 to 50 psig) for cylinder regulator, 1723 hPa-gauge (25 psig) nominal for internal pressure.
NOTE
The sample gas and regulated air
should be filtered for particulates
down to 2 microns to prevent the
plugging of pneumatic components.
2-5 LEAK TEST
The analyzer module is completely leak
tested at the factory. The user is responsible for testing for leakage at the inlet and
outlet fittings on the rear panel. The user is
also responsible for internal leak testing periodically and if any internal pneumatic
components are adjusted or replaced (with
a test procedure chosen by the user).
2-4 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
A
Instruction Manual
760004-A
February 2002
REGULATOR,
PURGE AIR
PLUG
1/4NPT
SWITCH,
PURGE
FLOW
DIFFUSER
PURGE
PRESSURE
SENSOR
BULKHEAD
3/8T BRASS
REDUCER
3/8T - 1/4T
BRASS
B
PURGE
AIR IN
PLUG
1/8NPT
ADAPTER
1/4T - 1/8NPT
BRASS
ELBOW
PURGE AIR
RESTRICTOR
BRASS
TUBING 1/4 OD
VITON
TUBING 1/4 OD
COPPER
ELBOW
1/4T - 1/4MPT
BRASS
REGULATED
CHECK
VALVE
1/3 PSIG
ELBOW
1/4T - 1/4FPT
BRASS
ELBOW
1/4T - 1/4NPT
BRASS
IN
FIXED FLOW
CONTROLLER,
REGULATED AIR
BULKHEAD
RESTRICTOR
1/4T - 1/4T
AIR IN
SS
BULKHEAD
1/4T - 1/4T
BRASS
MANIFOLD,
SAMPLE
UNION
1/4T BRASS
PRESSURE SENSOR,
REGULATED AIR
0 - 15 PSIG
HEATED
SAMPLE
IN
OUT
RUN TEE
1/4T - 1/4MPT
BRASS
SAMPLE
BYPASS
OUT
BURNER
DETECTOR
FUEL RESTRICTOR
1/8T - 1/8T
TUBING 1/8 OD
COPPER
TUBING 1/4 OD
COPPER
AIR IGNITE
RESTRICTOR
BURNER
EXHAUST
BULKHEAD
1/4T - 1/8T
SS
RESTRICTOR,
BYPASS
SENSOR,
SAMPLE
TEMPERATURE
SAMPLE
CAPILLARY
CONNECTOR
1/16T - 1/8NPT
SS
ELBOW
1/8T - 1/8T
BRASS
PRESSURE
RELIEF
VALVE
BULKHEAD
REDUCER
1/4T - 1/8T
BRASS
TUBING 1/8 OD
COPPER
RUN TEE
1/8T - 1/8MPT
BRASS
AIR
RESTRICTOR
ELBOW
1/8T - 1/8MPT
BRASS
BURNER
AIR IN
SENSOR,
BURNER AIR
PRESSURE
-
TUBING 1/8 OD
COPPER
OUT
PURGE
AIR OUT
FILTER
RUN TEE
1/4T - 1/4FPT
BRASS
PORT CONNECTO R
1/4
TUBING 1/8 OD
COPPER
TUBING 1/8 OD
SS
GA
BULKHEAD
3/8T - 1/4MPT
BRASS
TUBING 1/4 OD
VITON
OUT
IN
PRESSURE
REGULATOR,
BURNER AIR
0 - 60 PSIG
BULKHEAD
CONNECTOR
1/4T - 1/8NPT
SS
PRESSURE
SWITCH
SENSOR,
FUEL
PRESSURE
-
GA
IN
REGULATOR,
FUEL
PRESSURE
0 - 30 PSIG
FUEL
IN
SOLENOID
VALVE
TUBING 1/8 OD
SS
FUEL
RESTRICTOR
MALE
CONNECTOR
1/8T - 1/8NPT
SS
Figure 2-2. Flow Diagram
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 2-5
Instruction Manual
760004-A
February 2002
2-6 ELECTRICAL CONNECTIONS
Two electrical connections are required on the
Analyzer Module: POWER and NETWORK
(See Figure 2-3 and Figure 2-4). On the Analyzer Module, two NETWORK connectors are
available, either of which is appropriate for: 1)
interconnection with the control module or 2)
"daisy-chaining" with other NGA 2000 components. Connect Analyzer Module POWER to an
external +24 VDC power source with a voltage
tolerance of ±5% and a minimum power rating
of 120 watts.
Model NGA 2000 HFID
Figure 2-3. Front Panel Electrical Connections
NETWORK1
NETWORK2
POWER
FUSE
HFID
POSSIBLE
EXPLOSION HAZARD
Do not operate flammable
sample without following
instructions in the Manual.
An explosion resulting in
severe personal injury or
death could occur.
DANGER
Ne pas utiliser l′echantillon
inflammable avant d′avoir pris
connaissance des inst ructions
contenues dans le manuel . Le
non respect de ces in structions
peut entrainer une ex plosion
provoquant des blessure graves
ou mortelles.
BURNER
AIR
FUEL
POSSIBLE
EXPLOSION HAZARD
Hydrogen fuel gas is use d in this instrument.
Do not remove fuel res trictor or operate at
greater than 50 psig. An explosion resulting
DANGER D′EXPLOSION
Cet instrument contient du gaz hydrogene. Ne
retirez pas le limitateur d′de
combustible, et n′operez pas au plus de 50
psig
Ces conditions peuvent provoquer une explosion
POWER
OVEN
HEAT
FLAME
ON
PURGE
AIR
FUEL
OVERRIDE
IGNITE
24V
LON
1
LON
2
1 +
2 3 GND
T 6A
250 V
Figure 2-4. Front Panel Connections, Controls and Indicators
2-6 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
[
]
[75]
[83]
[81]
[35].9[23]
FRONT VIEW
1.1
8.2
[208]
6.8
[174]
[18]
Instruction Manual
760004-A
February 2002
3.6
[91]
1.9
.7
[48]
.6
[15]
SIDE VIEW
.3
[7]
.7
[17]
.2
[6]
REAR VIEW
.25
[6]
DIA
4.3
110
2.0
[51]
1.1
[27]
2.0
[52]
4.2
[107]
4.0
[103]
5.4
[137]
[152]
22.5
[571]
7.2
[183]
6.0
1.1
[28]
2.8
[71]
1.4
[34]
1.0
[25]
2.4
[60]
3.0
3.1
[78]
3.3
1.4
3.2
Dimensions:
INCHES
[MM]
Figure 2-5. HFID Outline and Mounting Dimensions
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 2-7
Instruction Manual
,
J4
P4J5P5
J1
P1
,
AIR
HEAT
FLAMEON
HARNESS
P2
12345678
,
J5 +10VREF
SHIELD
R38
GRY
PUR
760004-A
February 2002
P6
J6
J1
P1
FLAT 24 COND
P4J4P5
CABLE ASSEMBLY
CABLE ASSEMBLY, FLAT 20 COND
FLAT 3 COND
CABLE ASSEMBLY
CABLE ASSEMBLY,
FLAT 16 COND
P4
J4
CABLE ASSEMBLY,
FLAT 30 COND
J6
P6
POWER
SUPPLY
BOARD
J3
P3
J1
P1
J5
SAFETY
BOARD
COMPUTER
ANALYSIS
BOARD
J2
P2
CABLE ASSEMBLY,
FLAT 3 COND
P9
P3
J3
J9
FUEL SOL.
OVEN HEATER
-
+-+-+
P10
YEL
BLU
GRN
BRN
RED
ORN
P15
P16
J2
P7
J7
J3
P3
J15
J16
MTG
STUD
J7
3-WAY SOLENOID
CABLE ASSY,
PRESSURE
POWER
Model NGA 2000 HFID
POWER
OVEN
LON/POWER
MODULE
J5
P5
J2
P2
J8
P8
J11
P11
P7
BLK
BLK
RED
RED
AIR
FUEL IN
SENSOR,
CASE
PRESS
SWITCH
FLOW
SW
FLOW
SW
SWITCH
GND
STRAP
CASE TEMP
POL
VOL
2-WAY SOLENOID
SWITCH
FLOW
E2 24VOLT
E1 RTN
E3
CABLE ASSEMBLY,
HARNESS,
CHASSIS
CHASSIS
GND
R37
P18
P17
FLAT 10 COND
THERMOSTAT
HEATER
P10
J10
CABLE ASSEMBLY,
SENSOR BD TO HARNESS
J18
J17
CABLE ASSEMBLY, ANODE
CABLE ASSEMBLY, CATHODE
BLK
RED
GRN
J14
P14
GLOW PLUG
HARNESS
P1
J1
SHIELD
PREAMP
BOARD
E3
E2
FAN ASSEMBLY
SENSOR,
AIR
PRESSURE
OVEN
CABLE ASSEMBLY, THERMAL FUSE
J6
P1 J1
JP1
RTN
J3
P3
SENSOR,
SENSOR,
FUEL
SAMPLE
PRESSURE
PRESSURE
J11 P11
J10 P10
J9 P9
J10 P10
J11
P11
SENSOR
BOARD
J13
P13
J16
P16
J15
P15
P4 J4
P5 J5
SAMPLE RTD
SENSOR ASSEMBLY,
CABLE
ASSEMBLY,
IGNITOR
J1 P1
PURGE AIR
SWITCH
ASSEMBLY,
MANUAL
IGNITE
LED INDICATOR
ASSEMBLY
P2 J2
PWR
MOD
J1
J8 P8
OVEN HEATER
J6
J1
SENSOR ASSEMBLY,
REF TEMP
OVEN
ANODE
HEATER
J2
POWER
MODULE
ASSEMBLY
J4
J12 P12
NC
J12 P12
J7 P7
NC
J14
P3 J3
CABLE ASSEMBLY,
FLAME OUT
CATHODE
DETECTOR
BLOCK
ASSEMBLY
THERMAL OVEN SAMPLE
SWITCH RTD RTD
Figure 2-6. HFID Wiring Diagram
2-8 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
Instruction Manual
760004-A
February 2002
2-7 INSTALLATION CONSIDERATIONS CHECK-
LIST
Verify the following:
• The Analyzer’s location should
be:
Clean
A well ventilated area
weatherproofed
Non-hazardous
Vibration-free
Have stable ambient temperature
• The gas cylinders should be
equipped with a clean, hydrocarbon free two stage regulator and
shut off valve.
• All external tubing, regulators,
valves, pumps, fittings, etc. are
clean.
• The bypass line connection must
be slanted down a minimum of 6
degrees from horizontal for
drainage of water condensation.
• If required, thermal insulation
around the bypass fitting to prevent condensation in the bypass
restrictor.
• If required, thermal insulation for
the sample inlet connection to
minimize the cold spot.
• The heated line is at the correct
temperature.
• The sample, zero, and span
gases are at the correct temperature.
• The heated line to have over
temperature protection.
• The sample, bypass, and burner
exhaust tubing material must
handle high temperature and
have thermal insulation to protect
from burns.
• The correct fuel type is being
used.
• The THC content of the supply
gases are compatible with the
analysis range.
• The calibration background
gases are similar to the sample.
• The purge air out, burner exhaust, and bypass are vented to
atmospheric pressure. The pressure should be constant.
• The burner exhaust tube must be
slanted down a minimum of 6
degrees from horizontal.
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 2-9
• The purge air out tubing to be
3/8 inch and less than 4 feet in
length.
• All external gas connections
have been leak checked.
• The dead volume for external
sample and fuel lines have been
minimized.
• The stainless steel tubing used
for the fuel and sample lines is
clean.
Instruction Manual
760004-A
February 2002
Model NGA 2000 HFID
2-10 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
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