Galvanic Applied Sciences AccuChrome MA2963 User manual

AccuChromeTM
GAS CHROMATOGRAPH
OPERATION MANUAL
P/N: MA2963
Revision 4 Dec. 15, 2018
Galvanic Applied Sciences, Inc.
7000 Fisher Road S.E.
Calgary, Alberta, T2H OW3
Canada
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
www.galvanic.com

NOTICES
This system is covered by a limited warranty. A copy of the warranty is included with this manual. The
operator is required to perform routine maintenance as described herein on a periodic basis to keep the
warranty in effect. For routine maintenance procedures, refer to Maintenance Section.
All information in this manual is subject to change without notice and does not represent a commitment
on the part of Galvanic Applied Sciences, Inc.
No part of this manual may be reproduced or transmitted in any form or by any means without the written
permission of Galvanic Applied Sciences, Inc.
Note: Changes or modifications not expressly approved by Galvanic Applied Sciences, Inc. could void
the user's authority to operate the equipment.
© Copyright 2018, Galvanic Applied Sciences, Inc. All rights reserved.
Printed in Canada

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Table of Contents
SECTION 1OVERVIEW OF THE ACCUCHROME GAS CHROMATOGRAPH................................................1
1.1 ANALYZER GENERAL DESCRIPTION.........................................................................................1
1.1.1 Introduction ...........................................................................................................1
1.2 GENERAL MODE OF OPERATION OF THE GAS CHROMATOGRAPH..............................................1
SECTION 2ANALYZER DESIGN ..........................................................................................................2
2.1 OVERVIEW.............................................................................................................................2
2.2 CHROMATOGRAPH OVEN........................................................................................................3
2.2.1 Injection/Switching Valves ....................................................................................3
2.2.2 Chromatograph Columns......................................................................................3
2.2.3 Thermal Conductivity Detector .............................................................................4
2.3 ELECTRONICS ENCLOSURE ....................................................................................................5
2.3.1 The Controller Board ............................................................................................5
2.3.2 The I/O Board .......................................................................................................5
2.3.3 The Display...........................................................................................................6
2.3.4 The Intrinsic Safety (IS) Barrier ............................................................................7
2.4 TYPICAL GC OVEN ARRANGEMENTS.......................................................................................9
2.4.1 12-Minute Cycle Time Systems ............................................................................9
2.4.2 4-Minute Analysis Cycle .....................................................................................10
SECTION 3INSTALLATION................................................................................................................12
3.1 RECEIVING THE SYSTEM.......................................................................................................12
3.2 ENVIRONMENTAL REQUIREMENTS.........................................................................................12
3.2.1 Temperature/Humidity ........................................................................................12
3.2.2 Space Requirements /Weight .............................................................................12
3.3 SAMPLING CONSIDERATIONS ................................................................................................16
3.3.1 Sampling Point Location .....................................................................................16
3.3.2 Sample Volume and Flow Rate ..........................................................................16
3.3.3 Sample Conditioning...........................................................................................16
3.4 ELECTRICAL REQUIREMENTS ................................................................................................16
3.5 INSTALLATION STEPS ...........................................................................................................17
3.6 INTERFACING THE CHROMATOGRAPH TO THE COMPUTER.......................................................20
SECTION 4THE USER INTERACTION SCHEME ..................................................................................22
4.1 OVERVIEW...........................................................................................................................22
4.2 NAVIGATING THE CHROMATOGRAPH DISPLAY........................................................................22
4.2.1 The Keypad Controller........................................................................................24
4.2.2 The Analysis Results Tab ...................................................................................25
4.2.3 Chromatogram Tab.............................................................................................25
4.2.4 Alarms Tab .........................................................................................................26
4.2.5 GC Status Tab ....................................................................................................27
4.2.6 I/O Status Tab.....................................................................................................28
4.2.7 System Tab.........................................................................................................29
4.3 POWERING UP THE APPLICATION SOFTWARE ........................................................................32
4.4 THE MAIN SCREEN -VIEW MODE..........................................................................................35
4.4.1 Quick Access Toolbar.........................................................................................36
4.4.2 Toolbar................................................................................................................36
4.4.3 System Operating Parameters ...........................................................................37

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4.4.4 Alarm Tab ...........................................................................................................37
4.4.5 Min and Max Buttons ..........................................................................................37
4.5 TABBED PAGES....................................................................................................................38
4.5.1 The Chromatogram Tab .....................................................................................38
4.5.2 Analysis Results Tab ..........................................................................................47
4.5.3 Archive Tab.........................................................................................................49
4.5.4 Events Tab..........................................................................................................50
4.5.5 Reports Tab ........................................................................................................51
4.6 ALARMS ..............................................................................................................................53
SECTION 5CONFIGURING THE GC ..................................................................................................54
5.1 THE CONFIGURATION ...........................................................................................................54
5.2 GENERAL GUIDELINES FOR EDITING A CONFIGURATION .........................................................56
5.3 THE COMPONENT TABLE ......................................................................................................57
5.3.1 The Ribbon .........................................................................................................57
5.4 CHROMATOGRAPHIC PARAMETERS .......................................................................................60
5.4.1 General Parameters ...........................................................................................60
5.4.2 Skimming Parameters ........................................................................................61
5.4.3 Fitting Parameters ..............................................................................................63
5.4.4 Physical Properties of the Calibration Gas .........................................................63
5.5 ACTION LIST ........................................................................................................................64
5.6 STREAMS SETUP .................................................................................................................66
5.7 STREAM SEQUENCER...........................................................................................................70
5.8 STREAM SCHEDULER ...........................................................................................................71
5.9 DIGITAL INPUTS ...................................................................................................................72
5.10 DIGITAL OUTPUTS ................................................................................................................73
5.11 ANALOG INPUTS...................................................................................................................74
5.12 ANALOG OUTPUTS ...............................................................................................................75
5.13 GLOBAL SETTING .................................................................................................................76
SECTION 6USING THE INSTRUMENT ................................................................................................77
6.1 INTRODUCTION ....................................................................................................................77
6.2 VIEW MODE .........................................................................................................................77
6.2.1 Viewing the Current Chromatogram ...................................................................77
6.2.2 Viewing Data.......................................................................................................78
6.2.3 Generating Reports ............................................................................................80
6.3 SETTING UP THE DESIRED ANALYSIS.....................................................................................80
6.3.1 Editing the Component Table .............................................................................81
6.3.2 Editing an Action.................................................................................................82
6.3.3Editing Alarms.....................................................................................................82
SECTION 7ACCUCHROME VALIDATION .......................................................................................83
7.1 OVERVIEW...........................................................................................................................83
7.2 ROLE OF THE CALIBRATION GAS AND THE REFERENCE GAS...................................................84
7.3 PERFORMING A CALIBRATION ...............................................................................................84
7.4 DETERMINING IF THE CHROMATOGRAPH IS FUNCTIONING IN AN ACCEPTABLE MANNER............86
7.5 REMEDIAL ACTIVITIES IF THE OBSERVED RESULTS DO NOT MEET THE CERTIFIED VALUES.......87
SECTION 8MODBUS .......................................................................................................................89
8.1 OVERVIEW...........................................................................................................................89
8.2 THE MODBUS LIST PAGE ......................................................................................................90
8.2.1Modbus List Page - Enron Mode ........................................................................90

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8.2.2 Modbus List Page – Modicon 16 Mode ..............................................................92
8.2.3 Modbus List Page – Modicon with Floating Points.............................................93
8.3 COMMUNICATION PORTS ......................................................................................................93
SECTION 9MAINTENANCE...............................................................................................................95
9.1 OVERVIEW...........................................................................................................................95
9.2 WEEKLY CHECK-OUT PROCEDURE .......................................................................................95
9.3 CLEANING THE ACCUCHROME..........................................................................................96
9.4 REPLACING THE HELIUM CYLINDER.......................................................................................96
9.5 MAINTAINING FLOW CONTROL ..............................................................................................97
9.6 REPLACING INTERNAL COMPONENTS ....................................................................................97
9.6.1 Replacing the Valve............................................................................................98
9.6.2 Replacing the Column(s) ....................................................................................99
9.7 CHECKING THE COLUMN OVEN ...........................................................................................100
9.8 SPARE PARTS....................................................................................................................100
SECTION 10 TROUBLESHOOTING.....................................................................................................102
10.1 OVERVIEW.........................................................................................................................102
10.2 POTENTIAL FAULTS ............................................................................................................103
10.2.1 Baseline Issues.................................................................................................103
10.2.2 Questionable Chromatographic Output ............................................................104
10.2.3 Instrumental Issues...........................................................................................105
SECTION 11 THEORY OF GAS CHROMATOGRAPHY ...........................................................................106
11.1 WHAT IS GAS CHROMATOGRAPHY? ....................................................................................106
11.2 HOW DOES A GAS CHROMATOGRAPH SEPARATE THE COMPOUNDS IN A SAMPLE?................106
11.3 BASIC PARTS OF A GAS CHROMATOGRAPH .........................................................................107
11.4 HOW ARE THE COMPONENTS DETECTED AND QUANTIFIED? .................................................108
11.5 THE CHROMATOGRAPH OUTPUT:THE CHROMATOGRAM......................................................109
SECTION 12 WIRING BOOK .............................................................................................................110
SECTION 13 DEFINITIONS AND FORMULAS .......................................................................................120
13.1 TERMS COMMONLY USED IN THE MANUAL ...........................................................................120
13.2 CALIBRATION FORMULAS AND ANALYZER CALCULATIONS.....................................................121
SECTION 14 TYPICAL PARAMETERS OF NATURAL GAS COMPONENTS ...............................................124
14.1 GPA PARAMETERS ............................................................................................................124
14.2 AGA PARAMETERS ............................................................................................................125
SECTION 15 VALCO 6AND 10 PORT VALVE TECHNICAL INFORMATION ..............................................126
15.1 VALVE OPERATION INSTRUCTIONS ......................................................................................126
15.2 VALVE MAINTENANCE INSTRUCTIONS..................................................................................128
SECTION 16 ACCUCHROME SPECIFICATIONS...............................................................................130

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List of Figures
FIGURE 2-1: MAIN COMPONENTS OF THE ACCUCHROME GAS CHROMATOGRAPH-CLASS 1DIVISION 1... 2
FIGURE 2-2: CHROMATOGRAPH VALVE AND COLUMNS......................................................................... 3
FIGURE 2-3: THERMAL CONDUCTIVITY DETECTOR ............................................................................... 4
FIGURE 2-4: THE CONTROLLER BOARD............................................................................................... 5
FIGURE 2-5: THE I/O BOARD .............................................................................................................. 6
FIGURE 2-6: THE DISPLAY .................................................................................................................. 7
FIGURE 2-7: THE INTRINSICALLY SAFE BARRIER.................................................................................. 8
FIGURE 2-8: SINGLE COLUMN FLOW DIAGRAM .................................................................................... 9
FIGURE 2-9: TWO COLUMN FLOW DIAGRAM ...................................................................................... 10
FIGURE 2-10: 4-MINUTE ANALYSIS FLOW DIAGRAM........................................................................... 11
FIGURE 3-1: PHYSICAL DIMENSIONS -CLASS 1, DIV 2ACCUCHROME CHROMATOGRAPH................ 13
FIGURE 3-2: PHYSICAL DIMENSIONS -CLASS 1, DIV 1EXPLOSION PROOF ACCUCHROME
CHROMATOGRAPH ........................................................................................................................... 14
FIGURE 3-3: GAS TUBE-IN PORTS AND VENT,CLASS 1, DIV.1SYSTEM.............................................. 18
FIGURE 3-4: GAS TUBE-IN PORTS AND VENT,CLASS 1, DIV.2SYSTEM.............................................. 19
FIGURE 3-5: NETWORK SUB-PANEL .................................................................................................. 20
FIGURE 4-1: THE DISPLAY ON THE CHROMATOGRAPH........................................................................ 23
FIGURE 4-2: THE KEYPAD CONTROLLER ........................................................................................... 24
FIGURE 4-3: CHROMATOGRAM TAB................................................................................................... 25
FIGURE 4-4: THE ALARMS TAB ......................................................................................................... 26
FIGURE 4-5: GC STATUS TAB........................................................................................................... 27
FIGURE 4-6: I/O STATUS TAB ........................................................................................................... 28
FIGURE 4-7: INFO SCREEN ............................................................................................................... 29
FIGURE 4-8: THE NETWORK TAB ...................................................................................................... 30
FIGURE 4-9: THE TOOLS TAB ........................................................................................................... 31
FIGURE 4-10: ACCUCHROME ICON ............................................................................................... 32
FIGURE 4-11: LOG IN NAVIGATION DIALOG BOX................................................................................. 32
FIGURE 4-12: NEW CONNECTION SETUP DIALOG BOX ....................................................................... 33
FIGURE 4-13: EXIST CONNECTION DIALOG BOX ................................................................................ 33
FIGURE 4-14: SELECT MODE DIALOG BOX ........................................................................................ 34
FIGURE 4-15: MAIN SCREEN ACCUCHROME ................................................................................. 35
FIGURE 4-16: TOOLBAR ................................................................................................................... 36
FIGURE 4-17: THE RIBBON ............................................................................................................... 36
FIGURE 4-18: CHROMATOGRAM TAB................................................................................................. 38
FIGURE 4-19: CHROMATOGRAM TAB RIBBON BAR ............................................................................. 39
FIGURE 4-20: TRACE COLOR............................................................................................................ 39
FIGURE 4-21: EDIT CHROMATOGRAM DIALOG BOX ............................................................................ 39
FIGURE 4-22: PRESENTING ACTIONS ON THE CHROMATOGRAM ......................................................... 40
FIGURE 4-23: ACTIONS LIST SELECTION............................................................................................ 40
FIGURE 4-24: CHART OPTIONS WHEN CLICKING IN THE ACTION DESCRIPTION BOX................................ 41
FIGURE 4-25: ACTION WHEN CLICKING IN THE ACTION DESCRIPTION BOX ............................................ 41
FIGURE 4-26: COMPONENTS INTEGRATION WINDOWS ALONG WITH CHROMATOGRAM........................... 41
FIGURE 4-27: INDIVIDUAL COMPONENT ZOOMED IN ............................................................................ 42
FIGURE 4-28: COMPONENT EDITING ON CHROMATOGRAM TAB........................................................... 42
FIGURE 4-29: COMPONENT EDIT WINDOW ACCESSED ON THE CHROMATOGRAM TAB............................ 43
FIGURE 4-23: PAUSE POLL FUNCTIONS ............................................................................................ 43
FIGURE 4-24: CHART COMMANDS..................................................................................................... 45
FIGURE 4-25: COLOR AFTER FIRST BACK COLOR (ALSO SHOWS BORDER) .......................................... 46
FIGURE 4-26: ARCHIVED MARKERS DISPLAY SELECTION DIALOG BOX ............................................... 47
FIGURE 4-27: ANALYSIS RESULTS TAB ............................................................................................. 47
FIGURE 4-28: DISPLAY OF PHYSICAL PROPERTIES ............................................................................ 48

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FIGURE 4-29: ARCHIVE TAB ............................................................................................................. 49
FIGURE 4-30: EVENTS TAB............................................................................................................... 50
FIGURE 4-31: REPORTS TAB ............................................................................................................ 51
FIGURE 4-32: SAMPLE REPORT ........................................................................................................ 52
FIGURE 5-1: ACCUCHROME –CONFIGURATION MODE................................................................... 54
FIGURE 5-2: THE RIBBON (ISO METHOD).......................................................................................... 57
FIGURE 5-3: THE RIBBON –GPA OR LIQUID METHOD........................................................................ 58
FIGURE 5-4: COMPONENT TABLE ...................................................................................................... 60
FIGURE 5-5: DEFINITION OF A PEAK .................................................................................................. 62
FIGURE 5-6: PHYSICAL PROPERTIES OF THE CALIBRATION GAS ......................................................... 63
FIGURE 5-7: ACTION LIST WITH TOOLS.............................................................................................. 64
FIGURE 5-8: ADD ACTION DIALOG BOX ............................................................................................. 65
FIGURE 5-9: SET GAIN ACTION DIALOG BOX ..................................................................................... 65
FIGURE 5-10: STREAMS SETUP ........................................................................................................ 67
FIGURE 5-11: LOW DRY ALARM LIMITS TABLE ................................................................................... 69
FIGURE 5-12: STREAM SEQUENCER SCREEN .................................................................................... 70
FIGURE 5-13: STREAM SCHEDULER .................................................................................................. 71
FIGURE 5-14: DIGITAL INPUTS .......................................................................................................... 72
FIGURE 5-15: DIGITAL OUTPUTS SCREEN ......................................................................................... 73
FIGURE 5-16: ANALOG INPUT SCREEN .............................................................................................. 74
FIGURE 5-17: ANALOG OUTPUTS SCREEN ........................................................................................ 75
FIGURE 5-18: GLOBAL SETTING........................................................................................................ 76
FIGURE 6-1: ATYPICAL CHROMATOGRAM ......................................................................................... 78
FIGURE 6-2: ANALYSIS RESULTS ...................................................................................................... 79
FIGURE 6-3: ARCHIVE TAB ............................................................................................................... 79
FIGURE 6-4: THE REPORT TAB ......................................................................................................... 80
FIGURE 6-5: COMPONENT TABLE ...................................................................................................... 81
FIGURE 6-6: INTEGRATION WINDOW ................................................................................................. 82
FIGURE 7-1: STREAM SEQUENCER SELECTION OF THE CONFIGURE G.C. TAB .................................... 85
FIGURE 7-2: CONFIGURE G.C. TABLE ............................................................................................... 87
FIGURE 7-3: SKIMMING PARAMETERS INDICATE THE WINDOWS IN WHICH THE PEAK MINIMA CAN BE FOUND
....................................................................................................................................................... 88
FIGURE 8-1: MAIN MODBUS PAGE .................................................................................................... 89
FIGURE 8-2: ENRON MODE,SHORT INTEGERS .................................................................................. 91
FIGURE 8-3: ENRON MODE,FLOATING POINTS.................................................................................. 92
FIGURE 8-4: COMMUNICATION PORTS PAGE ..................................................................................... 93
FIGURE 8-5: SETTING PORT CONFIGURATION.................................................................................... 94
FIGURE 8-6: SETTING ETHERNET CONFIGURATION ............................................................................ 94
FIGURE 9-1: ACCUCHROME NATURAL GAS CHROMATOGRAPH CHECKOUT SHEET.......................... 96
FIGURE 9-2: COLUMNS AND VALVE ................................................................................................... 97
FIGURE 9-3: VALCO 10-PORT VALVE (SOME SYSTEMS HAVE 6-PORT VALVES) ..................................... 99
FIGURE 11-1: SEPARATION OF A GAS SAMPLE VIA GAS CHROMATOGRAPHY ..................................... 107
FIGURE 11-2: COMPONENTS OF A GAS CHROMATOGRAPH............................................................... 107
FIGURE 11-3: DESIGN OF A THERMAL CONDUCTIVITY DETECTOR ..................................................... 108
FIGURE 11-4: CHROMATOGRAM DESCRIPTION ................................................................................ 109
FIGURE 12-1: PLGC POWER CONNECTIONS................................................................................... 111
FIGURE 12-2: RELAYS WIRING DIAGRAM......................................................................................... 111
FIGURE 12-3: ANALOG OUTPUTS –LOOP POWERED MODE ............................................................. 112
FIGURE 12-4: ANALOG OUTPUTS –SELF POWERED MODE .............................................................. 112
FIGURE 12-5: ISOLATED RS-485 PORT CONNECTION ...................................................................... 113
FIGURE 12-6: ISOLATED RS-232 CONNECTIONS ............................................................................. 113
FIGURE 12-7: ANALOG INPUTS –RTD CONNECTIONS...................................................................... 114
FIGURE 12-8: ANALOG INPUTS –PRESSURE TRANSDUCER CONNECTIONS ....................................... 114

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FIGURE 12-9: ANALOG INPUTS –4-20-MACONNECTIONS ............................................................... 115
FIGURE 12-10: ANALOG INPUTS 4-20 MVTXR CONNECTIONS ......................................................... 115
FIGURE 12-11: OVEN RTD AND TCD CONNECTIONS....................................................................... 116
FIGURE 12-12: ARCNET AC485 TWISTED PAIR CONNECTION .......................................................... 116
FIGURE 12-13: OVEN HEATER CONNECTION ................................................................................... 117
FIGURE 12-14: GC VALVES CONNECTIONS..................................................................................... 117
FIGURE 12-15: SOLENOIDS 5TO 10 CONNECTIONS ......................................................................... 118
FIGURE 12-16: SOLENOIDS 1TO 4CONNECTIONS ........................................................................... 118
FIGURE 12-17: DIGITAL INPUTS CONNECTIONS ............................................................................... 119
FIGURE 12-18: CABINET HEATER CONNECTION............................................................................... 119

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List of Tables
TABLE 3-1: SPACE/WEIGHT OF THE ACCUCHROME CHROMATOGRAPH........................................... 12
TABLE 7-1: COMPOSITION OF A TYPICAL NATURAL GAS CALIBRATION BLEND ..................................... 83
TABLE 7-2: TYPICAL ALLOWED DEVIATION ........................................................................................ 86
TABLE 9-1: ACCUCHROME CLASS 1, DIV 2PARTS LIST ............................................................... 100
TABLE 12-1: WIRING BOOK –ACCUCHROME GAS CHROMATOGRAPH .......................................... 110
TABLE 14-1: PARAMETERS OF NATURAL GAS COMPONENTS (GPA)................................................. 124
TABLE 14-2: PARAMETERS OF NATURAL GAS COMPONENTS (AGA)................................................. 125
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Revision 4 10 12/15/2018
Safety Symbols used in Manual
The Danger symbol indicates a hazardous situation
that, if not avoided will result in death or serious injury.
The Warning symbol indicates a hazardous situation
that, if not avoided could result in death or serious
injury.
The Caution symbol with the safety alert symbol
indicates a hazardous situation that, if not avoided
could result in minor or moderate injury.
The Notice symbol is used to highlight information that
will optimize the use and reliability of the system.

Revision 4 11 12/15/2018
Important Safety Guidelines for Galvanic Applied Sciences Inc.,
ACCUCHROME Gas Chromatograph
This equipment must be used as specified by the manufacturer or overall safety
will be impaired.
Access to this equipment should be limited to authorized, trained personnel ONLY.
Due to the thermal mass of the hardware, cooling of the items takes substantial
time.
Observe all warning labels on the analyzer enclosures.
The analog outputs and alarm relay contacts may be powered by a source separate from the
one (s) used to power the analyzer system. Disconnecting the AC Mains Source (s) may not
remove power from the analog output signals or the alarm relay contacts.
Any safety recommendations or comments contained herein are suggested guidelines only.
Galvanic Applied Sciences Inc. bears no responsibility and assumes no liability for the use and/or
implementation of these suggested procedures.
This system, when operating in its normal mode, and/or when it is being serviced, maintained,
installed and commissioned contains items which may be hazardous to humans if handled or
operated incorrectly or negligently. These hazards include, but are not limited to:
•High Voltage Electrical Energy
•Toxic and Explosive Gases
•High Temperature Surfaces
Access to this equipment should be limited to only to authorized, trained
personnel.

Revision 4 12 12/15/2018
Manufacturer’s Warranty Statement
Galvanic Applied Sciences Inc. (“Seller”) warrants that its products will be free from defects in
materials and workmanship under normal use and service in general process conditions for 12
months from the date of Product start-up or 18 months from the date of shipping from Seller’s
production facility, whichever comes first (the “Warranty Period”). Products purchased by Seller
from a third party for resale to Buyer ("Resale Products") shall carry only the warranty extended
by the original manufacturer. Buyer agrees that Seller has no liability for Resale Products beyond
making a reasonable commercial effort to arrange for procurement and shipping of the Resale
Products. Buyer must give Seller notice of any warranty claim prior to the end of the Warranty
Period. Seller shall not be responsible for any defects (including latent defects) which are
reported to Seller after the end of the Warranty Period.
THIS WARRANTY AND ITS REMEDIES ARE IN LIEU OF ALL OTHER WARRANTIES OR
CONDITIONS EXPRESSED OR IMPLIED, ORAL OR WRITTEN, EITHER IN FACT OR BY
OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING BUT NOT LIMITED TO,
WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, WHICH SELLER SPECIFICALLY DISCLAIMS.
Seller’s obligation under this warranty shall not arise until Buyer notifies Seller of the defect. Seller’s
sole responsibility and Buyer’s sole and exclusive remedy under this warranty is, at Seller’s option,
to replace or repair any defective component part of the product upon receipt of the Product at
Seller’s production facility, transportation charges prepaid or accept the return of the defective
Product and refund the purchase price paid by Buyer for that Product. If requested by Buyer, Seller
will use its best efforts to perform warranty services at Buyer’s facility, as soon as reasonably
practicable after notification by the Buyer of a possible defect provided that Buyer agrees to pay for
travel time, mileage from the Seller’s facility or travel costs to the airport / train station closest to
Buyer’s facility plus all other travel fees, hotel expenses and subsistence.
Except in the case of an authorized distributor or seller, authorized in writing by Seller to extend
this warranty to the distributor’s customers, the warranty herein applies only to the original
purchaser from Seller (“Buyer”) and may not be assigned, sold, or otherwise transferred to a third
party. No warranty is made with respect to used, reconstructed, refurbished, or previously owned
Products, which will be so marked on the sales order and will be sold “As Is”.
Limitations
These warranties do not cover:
• Consumable items such as lamps.
• Analyzer components which may be damaged by exposure to contamination or fouling
from the process fluid due to a process upset, improper sample extraction techniques or
improper sample preparation, fluid pressures in excess of the analyzer’s maximum rated
pressure or fluid temperatures in excess of the analyzer’s maximum rated
temperature. These include but are not limited to sample filters, pressure regulators,
transfer tubing, sample cells, optical components, pumps, measuring electrodes, switching
solenoids, pressure sensors or any other sample wetted components.
• Loss, damage, or defects resulting from transportation to Buyer’s facility, improper or
inadequate maintenance by Buyer, software or interfaces supplied by Buyer, operation
outside the environmental specifications for the instrument, use by unauthorized or
untrained personnel or improper site maintenance or preparation.

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• Products that have been altered or repaired by individuals other than Seller personnel or
its duly authorized representatives, unless the alteration or repair has been performed by
an authorized factory trained service technician in accordance with written procedures
supplied by Seller.
• Products that have been subject to misuse, neglect, accident, or improper installation.
• The sole and exclusive warranty applicable to software and firmware products provided by
Seller for use with a processor internal or external to the Product will be as follows: Seller
warrants that such software and firmware will conform to Seller’s program manuals or other
publicly available documentation made available by Seller current at the time of shipment
to Buyer when properly installed on that processor, provided however that Seller does not
warrant the operation of the processor or software or firmware will be uninterrupted or error-
free.
The warranty herein applies only to Products within the agreed country of original end destination.
Products transferred outside the country of original end destination, either by the Seller at the
direction of the Buyer or by Buyer’s actions subsequent to delivery, may be subject to additional
charges prior to warranty repair or replacement of such Products based on the actual location of
such Products and Seller’s warranty and/or service surcharges for such location(s).
Repaired Products
Repaired products are warranted for 90 days with the above exceptions.
Limitation of Remedy and Liability
IN NO EVENT SHALL SELLER BE LIABLE TO BUYER FOR ANY INDIRECT, CONSEQUENTIAL,
INCIDENTAL, SPECIAL OR PUNITIVE DAMAGES, OR FOR ANY LOSS OF USE OR
PRODUCTION, OR ANY LOSS OF DATA, PROFITS OR REVENUES, OR ANY CLAIMS RAISED
BY CUSTOMERS OF BUYER OR ANY ENVIRONMENTAL DAMAGE OR ANY FINES IMPOSED
ON BUYER BY ANY GOVERNMENTAL OR REGULATORY AUTHORITIES, WHETHER SUCH
DAMAGES ARE DIRECT OR INDIRECT, AND REGARDLESS OF THE FORM OF ACTION
(WHETHER FOR BREACH OF CONTRACT OR WARRANTY OR IN TORT OR STRICT
LIABILITY) AND WHETHER ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR NOT.

Revision 4 1 12/15/2018
Section 1 Overview of the AccuChrome Gas Chromatograph
1.1 Analyzer General Description
1.1.1 Introduction
The ACCUCHROME gas chromatograph is designed to identify and quantify the components
of natural gas and natural gas products. It can also be used to measure other gaseous
samples when fitted with appropriate columns. It calculates the energy content and provides
mole percent concentrations of each component as per GPA 2172-09 or ISO 6976. The
chromatograph is fully automated and designed to perform on-line, real time analysis. The
Windows™ based configuration program allows the user to view chromatograms as well as
configure the analyzer.
The component concentrations and the calculated physical properties are available via serial
Modbus and/or Modbus TCP/IP.
The ACCUCHROME is available in both Class 1 Division 1 and Class 1 Division 2 models.
Each of these models is also available with the option of AC power.
1.2 General Mode of Operation of the Gas Chromatograph
A detailed discussion of the theory of the separation and detection of the gases of interest via
gas chromatography is presented in Section 11. In addition, the definition of terms relevant
to gas chromatography and the description of various equations used in determination of the
concentration of gases are presented in Section 13. If the reader in unfamiliar with gas
chromatography, it may be useful to review these appendices.
.

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Section 2 Analyzer Design
2.1 Overview
The standard ACCUCHROME (Figure 2-1) consists of two compartments. The upper
compartment is referred to as the ‘chromatograph oven’, and houses the components
involved in the chromatograph analysis process. The 10 port valve (and 6-port valve, in High
Speed Heating Value Analysis analyzers), the chromatograph column(s), and the thermal
conductivity detector (TCD) are described further in Sections 2.2 and 2.3. A heater maintains
a constant temperature within the oven, which is critical for proper separation of the sample
gasses and the stability of the detector.
Figure 2-1: Main Components of the Accuchrome Gas Chromatograph-Class 1 Division 1
The lower compartment houses the ACCUCHROME electronics.

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2.2 Chromatograph Oven
2.2.1 Injection/Switching Valves
The ACCUCHROME uses Valco Model DV22 injection/switching valves for directing the flow
of carrier gas and sample gas within the chromatograph oven. See Section 15 of this manual
for more information about the operation and maintenance of the valves.
2.2.2 Chromatograph Columns
The ACCUCHROME uses micro-packed columns for the separation of the natural gas into its
constituent components. The stationary phase is either porous polymer or liquid coated
diatomaceous earth and is packed into a 1/16” O.D. tube. The length of the column will
depend on the specific separation requirements.
The micro-packed columns are manufactured by Galvanic Applied Sciences. The
chromatograph valve and column are shown in Figure 2-2.
Figure 2-2: Chromatograph Valve and Columns
Column 2
Column 1
Sample Loop
Helium enters to
actuate valve

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2.2.3 Thermal Conductivity Detector
A thermal conductivity detector (TCD) is used to detect the amount of each individual
component as it elutes from the chromatograph columns (Figure 2-3). The TCD is housed
inside the chromatograph oven and is kept at a very stable temperature to minimize drift.
Figure 2-3: Thermal Conductivity Detector
The TCD consists of 2 thermistor beads housed in separate compartments, the Reference
Cell and the Measure Cell.
When there are no components eluting from the column(s), both of the thermistors are
exposed to carrier gas and will be at the same temperature and thus have the same
resistance. In this case the Wheatstone Bridge is balanced and the voltage from the circuit
will remain at zero. The outlet of the column is plumbed to the Measurement cell so that
when a compound elutes from the column it passes through the Measurement cell while the
Reference cell contains only carrier gas.
Heat from the Measure thermistor will be transferred away from the Thermistor by the gas
that passes through the Measure Cell. The amount of heat that is transferred will depend on
the amount of gas that is flowing past and that gas’s ability to conduct heat (its thermal
conductivity). The temperature of the Measure Thermistor, and thus its resistance, will
change. In this case the Wheatstone Bridge will become unbalanced and a voltage
deflection will be observed.

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2.3 Electronics Enclosure
The electronics enclosure houses the controller board, the I/O board and the display. Class 1
Division 1 models also have 2 intrinsic safety (IS) barrier boards. Figure 2-1 shows the Class
1 Division 2 model.
2.3.1 The Controller Board
Figure 2-4 shows the controller board. This board contains the microprocessor and
associated components.
Figure 2-4: The Controller Board
2.3.2 The I/O Board
Figure 2-5 shows the I/O board. The I/O board contains all of the inputs and outputs required
for the GC analysis as well as customer connections. See Section 12 for detailed
descriptions of the connections.

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Figure 2-5: The I/O Board
2.3.3 The Display
The display (Figure 2-6) is mounted on the analyzer electronics enclosure door (for both Div
1 and Div 2 models). The display uses a local intrinsically safe keypad for navigation and can
be used to view status data about the chromatograph.

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Figure 2-6: The Display
The display is an industrial VGA display with 640 x 480 resolution. It uses TFT technology
with 260,000 colors and is sunlight readable.
2.3.4 The Intrinsic Safety (IS) Barrier
The IS barrier (Figure 2-7) is used in the Class Division 1 units only. All electrical signals that
connect from inside the explosion proof enclosure to inside the GC oven must pass through
the IS barrier. The purpose of the IS barrier is to limit the amount of electrical energy that can
exit the explosion proof enclosure to avoid creating an ignition source.