Teledyne Analytical Instruments GFC 7002T User manual

Teledyne Analytical Instruments
Operation Manual
Model GFC 7002T/GFC 7002TU
N2O Analyzer
TELEDYNE ELECTRONIC TECHNOLOGIES
Analytical Instruments
16830 Chestnut Street
City of Industry, CA 91748
Telephone: [phone]
Fax: [phone]
Web: www.teledyne-ai.com
P/N M07272
DATE 07/21/15
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Use and Disclosure of Data
Information contained herein is classified as EAR99 under the
U.S. Export Administration Regulations.
Export, reexport or diversion contrary to U.S. law is prohibited.

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Model GFC7002T N2O Analyzer
Teledyne Analytical Instruments ii
Copyright © 2015 Teledyne Analytical Instruments
All Rights Reserved. No part of this manual may be reproduced, transmitted, transcribed, stored in a retrieval
system, or translated into any other language or computer language in whole or in part, in any form or by any
means, whether it be electronic, mechanical, magnetic, optical, manual, or otherwise, without the prior written
consent of Teledyne Analytical Instruments, 16830 Chestnut Street, City of Industry, CA 91748.
Warranty
This equipment is sold subject to the mutual agreement that it is warranted by us free from defects of material
and of construction, and that our liability shall be limited to replacing or repairing at our factory (without
charge, except for transportation), or at customer plant at our option, any material or construction in which
defects become apparent within one year from the date of shipment, except in cases where quotations or
acknowledgements provide for a shorter period. Components manufactured by others bear the warranty of their
manufacturer. This warranty does not cover defects caused by wear, accident, misuse, neglect or repairs other
than those performed by Teledyne or an authorized service center. We assume no liability for direct or indirect
damages of any kind and the purchaser by the acceptance of the equipment will assume all liability for any
damage which may result from its use or misuse.
We reserve the right to employ any suitable material in the manufacture of our apparatus, and to make any
alterations in the dimensions, shape or weight of any parts, in so far as such alterations do not adversely affect
our warranty.
Important Notice
This instrument provides measurement readings to its user, and serves as a tool by which valuable data can be
gathered. The information provided by the instrument may assist the user in eliminating potential hazards caused
by his process; however, it is essential that all personnel involved in the use of the instrument or its interface be
properly trained in the process being measured, as well as all instrumentation related to it.
The safety of personnel is ultimately the responsibility of those who control process conditions. While this
instrument may be able to provide early warning of imminent danger, it has no control over process conditions,
and it can be misused. In particular, any alarm or control systems installed must be tested and understood, both
as to how they operate and as to how they can be defeated. Any safeguards required such as locks, labels, or
redundancy, must be provided by the user or specifically requested of Teledyne at the time the order is placed.
Therefore, the purchaser must be aware of the hazardous process conditions. The purchaser is responsible for
the training of personnel, for providing hazard warning methods and instrumentation per the appropriate
standards, and for ensuring that hazard warning devices and instrumentation are maintained and operated
properly.
Teledyne Analytical Instruments, the manufacturer of this instrument, cannot accept responsibility for
conditions beyond its knowledge and control. No statement expressed or implied by this document or any
information disseminated by the manufacturer or its agents, is to be construed as a warranty of adequate safety
control under the user’s process conditions.
Trademarks
All trademarks, registered trademarks, brand names or product names appearing in this document are the
property of their respective owners and are used herein for identification purposes only.

Model GFC7002T N2O Analyzer
Teledyne Analytical Instruments iii
ABOUT THIS MANUAL
This manual describes operation, specifications, and maintenance for the Model GFC 7002T and
GFC7002TU N2O Analyzers.
In addition this manual contains important SAFETY messages for this instrument. It is strongly
recommended that you read that operation manual in its entirety before operating the instrument.
ORGANIZATION
This manual is divided among three main parts and a collection of appendices at the end.
Part I contains introductory information that includes an overview of the analyzer,
descriptions of the available options, specifications, installation and connection
instructions, and the initial calibration and functional checks. The last two sections
contain Frequently Asked Questions (FAQs) followed by a glossary, and a description
of available options.
Part II comprises the operating instructions, which include basic, advanced and remote
operation, calibration, diagnostics, testing, validating and verifying, and ends with
specifics of calibrating for use in EPA monitoring.
Part III provides detailed technical information, such as theory of operation,
maintenance, and troubleshooting and repair. It also contains a section that provides
important information about electro-static discharge and avoiding its consequences.
The appendices at the end of this manual provide support information such as, version-
specific software documentation, lists of spare parts and recommended stocking levels,
and schematics.
CONVENTIONS USED
In addition to the safety symbols as presented in the Important Safety Information page,
this manual provides special notices related to the safety and effective use of the
analyzer and other pertinent information.
Special Notices appear as follows:
ATTENTION COULD DAMAGE INSTRUMENT AND VOID WARRANTY
This special notice provides information to avoid damage to your
instrument and possibly invalidate the warranty.
IMPORTANT IMPACT ON READINGS OR DATA
Could either affect accuracy of instrument readings or cause loss of data.
Note Pertinent information associated with the proper care, operation or
maintenance of the analyzer or its parts.

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Teledyne Analytical Instruments iv
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Safety Information Model GFC7002T N2O Analyzer
Teledyne Analytical Instruments
IMPORTANT SAFETY INFORMATION
Important safety messages are provided throughout this manual. Please read these messages carefully.
A safety message alerts you to potential hazards that could hurt you or others. Each safety message is
associated with a safety alert symbol. These symbols are found in the manual and inside the instrument. The
definition of these symbols is described below:
WARNING: Electrical Shock Hazard
HAZARD: Strong oxidizer
GENERAL WARNING/CAUTION: Read the accompanying
message for specific information.
CAUTION: Hot Surface Warning
Technician Symbol: All operations marked with this symbol are to
be performed by qualified maintenance personnel only.
DO NOT TOUCH: Touching some parts of the instrument without
protection or proper tools could result in damage to the part(s)
and/or the instrument.
Electrical Ground: This symbol inside the instrument marks the
central safety grounding point for the instrument.
CAUTION - General Safety Hazard
This instrument should only be used for the purpose and in the manner
described in this manual. If you use this instrument in a manner other
than that for which it was intended, unpredictable behavior could ensue
with possible hazardous consequences.
NEVER use any gas analyzer to sample combustible gas(es).
Note Technical Assistance regarding the use and maintenance of the
GFC7002T or any other Teledyne product can be obtained by contacting
Teledyne Customer Service Department:
Phone: [phone]
Email: [e-mail]
or by accessing various service options on our website at
http://www.teledyne-ai.com/.

Safety Information Model GFC7002T N2O Analyzer
Teledyne Analytical Instruments vi
CONSIGNES DE SÉCURITÉ
Des consignes de sécurité importantes sont fournies tout au long du présent manuel dans le but d’éviter des
blessures corporelles ou d’endommager les instruments. Veuillez lire attentivement ces consignes. Chaque
consigne de sécurité est représentée par un pictogramme d’alerte de sécurité; ces pictogrammes se retrouvent
dans ce manuel et à l’intérieur des instruments. Les symboles correspondent aux consignes suivantes :
AVERTISSEMENT : Risque de choc électrique
DANGER : Oxydant puissant
AVERTISSEMENT GÉNÉRAL / MISE EN GARDE : Lire la consigne
complémentaire pour des renseignements spécifiques
MISE EN GARDE : Surface chaude
Ne pas toucher : Toucher à certaines parties de l’instrument sans protection ou
sans les outils appropriés pourrait entraîner des dommages aux pièces ou à
l’instrument.
Pictogramme « technicien » : Toutes les opérations portant ce symbole doivent
être effectuées uniquement par du personnel de maintenance qualifié.
Mise à la terre : Ce symbole à l’intérieur de l’instrument détermine le point central
de la mise à la terre sécuritaire de l’instrument.
MISE EN GARDE
Cet instrument doit être utilisé aux fins décrites et de la manière décrite
dans ce manuel. Si vous utilisez cet instrument d’une autre manière que
celle pour laquelle il a été prévu, l’instrument pourrait se comporter de
façon imprévisible et entraîner des conséquences dangereuses.
NE JAMAIS utiliser un analyseur de gaz pour échantillonner des gaz
combustibles!

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Teledyne Analytical Instruments vii
TABLE OF CONTENTS
ABOUT THIS MANUAL ........................................................................................................... III
IMPORTANT SAFETY INFORMATION....................................................................................V
CONSIGNES DE SÉCURITÉ ..........................................................................................................................vi
TABLE OF CONTENTS..........................................................................................................VII
LIST OF APPENDICES.................................................................................................................................xiii
List of Figures................................................................................................................................................xiii
List of Tables..................................................................................................................................................xv
PART I GENERAL INFORMATION ......................................................................................... 1
1. INTRODUCTION, FEATURES AND OPTIONS .................................................................... 3
1.1. GFC7002T Family Overview....................................................................................................................3
1.2. Features.................................................................................................................................................. 4
1.3. GFC7002T/GFC7002TU Documentation ................................................................................................. 4
1.4. Options....................................................................................................................................................4
2. SPECIFICATIONS AND APPROVALS................................................................................. 9
2.1. Specifications..........................................................................................................................................9
2.2. EPA Equivalency Designation................................................................................................................ 10
2.3. Approvals and Certifications .................................................................................................................. 10
2.3.1. Safety.............................................................................................................................................. 10
2.3.2. EmC................................................................................................................................................ 10
2.3.3. Other Type Certifications ................................................................................................................. 10
3. GETTING STARTED........................................................................................................... 11
3.1. Unpacking the GFC7002T/GFC7002TU Analyzer .................................................................................. 11
3.1.1. Ventilation Clearance....................................................................................................................... 12
3.2. Instrument Layout.................................................................................................................................. 13
3.2.1. Front Panel...................................................................................................................................... 13
3.2.2. Rear panel....................................................................................................................................... 17
3.2.3. GFC7002T/GFC7002TU Analyzer Layout ........................................................................................ 18
3.3. Connections and Setup..........................................................................................................................21
3.3.1. Electrical Connections ..................................................................................................................... 22
3.3.1.1. Connecting Power ....................................................................................................................22
3.3.1.2. Connecting Analog Inputs (Option) ........................................................................................... 22
3.3.1.3. Connecting Analog Outputs...................................................................................................... 23
3.3.1.4. Current Loop Analog Outputs (Option 41) Setup...................................................................... 24
3.3.1.5. Connecting the Status Outputs ................................................................................................. 26
3.3.1.6. Connecting the Control Inputs................................................................................................... 27
3.3.1.7. Concentration Alarm Relay (Option 61) Standard Configuration ................................................ 28
3.3.1.8. Concentration Alarm Relay (Option 61) Air Products Configuration ........................................... 30
3.3.1.9. Connecting the Communication Interfaces................................................................................ 30
3.3.2. Pneumatic Connections................................................................................................................... 37
3.3.2.1. Pneumatic Connections for Basic Configuration........................................................................ 39
3.3.2.2. Pneumatic Layout for Basic configuration.................................................................................. 40
3.3.2.3. Pneumatic Connections for Zero/Span Valve Option................................................................. 41
3.3.2.4. Pneumatic Layout for Zero/ Span Valve Option......................................................................... 44
3.3.2.5. Pneumatic Layout for Internal Zero/ Span Valve Option ............................................................ 45
3.3.2.6. Pneumatic Option Z/S Valve with Pressurized Zero and Span................................................... 46
3.3.2.7. Calibration Gases..................................................................................................................... 46
3.4. Startup, Functional Checks, and Initial Calibration.................................................................................. 48
3.4.1. Startup.............................................................................................................................................48
3.4.2. Warning Messages.......................................................................................................................... 48
3.4.3. Functional Checks ........................................................................................................................... 50

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3.4.4. Initial Calibration.............................................................................................................................. 51
3.4.4.1. Interferents for N2O Measurements........................................................................................... 51
3.4.4.2. Initial Calibration Procedure...................................................................................................... 53
3.4.4.3. O2Sensor Calibration Procedure .............................................................................................. 58
3.4.4.4. CO2Sensor Calibration Procedure............................................................................................ 58
PART II OPERATING INSTRUCTIONS.................................................................................. 59
4. OVERVIEW OF OPERATING MODES............................................................................... 61
4.1. Sample Mode........................................................................................................................................ 62
4.1.1. Test Functions................................................................................................................................. 62
4.1.2. Warning Messages.......................................................................................................................... 65
4.2. Calibration Mode ................................................................................................................................... 66
4.3. Setup MODE......................................................................................................................................... 67
4.3.1. Password Security........................................................................................................................... 67
4.3.2. Primary Setup Menu........................................................................................................................ 67
4.3.3. Secondary Setup Menu (SETUP>MORE) ........................................................................................ 68
5. SETUP MENU .................................................................................................................. 69
5.1. SETUP CFG: Configuration Information ............................................................................................ 69
5.2. SETUP ACAL: Automatic Calibration................................................................................................. 70
5.3. SETUP DAS: Internal Data Acquisition System .................................................................................. 70
5.4. SETUP RNGE: Analog Output Reporting Range Configuration.......................................................... 70
5.4.1. Analog Output Ranges for N2O Concentration.................................................................................. 70
5.4.2. Physical Range vs Analog Output Reporting Ranges ....................................................................... 71
5.4.3. Reporting Range Modes: Single, Dual, Auto Ranges........................................................................ 72
5.4.3.1. SINGLE Range Mode (SNGL) .................................................................................................. 74
5.4.3.2. DUAL Range Mode (DUAL)...................................................................................................... 75
5.4.3.3. AUTO Range Mode (AUTO) ..................................................................................................... 77
5.4.4. Range Units..................................................................................................................................... 79
5.4.5. Dilution Ratio (Option)...................................................................................................................... 80
5.5. SETUP PASS: Password Protection.................................................................................................. 81
5.6. SETUP CLK: Setting the Internal Time-of-Day Clock and Adjusting Speed........................................ 83
5.6.1.1. Setting the Internal Clock’s Time and Day................................................................................. 83
5.6.1.2. Adjusting the Internal Clock’s Speed......................................................................................... 83
5.6.2. ID (Machine Identification)................................................................................................................ 85
5.6.3. INET (Ethernet)................................................................................................................................ 85
5.6.4. COM1 and COM2 (Mode, Baud Rate and Test Port)........................................................................ 85
5.7. SETUP VARS: Variables Setup and Definition.................................................................................... 85
5.8. SETUP Diag: Diagnostics Functions................................................................................................... 87
5.8.1. Signal I/O......................................................................................................................................... 90
5.8.2. Analog Output.................................................................................................................................. 91
5.8.3. Analog I/O Configuration.................................................................................................................. 91
5.8.3.1. Analog Output Calibration......................................................................................................... 96
5.8.3.2. Enabling or Disabling the AutoCal for an Individual Analog Output............................................ 96
5.8.3.3. Automatic Calibration of the Analog Outputs............................................................................. 97
5.8.3.4. Individual Calibration of the Analog Outputs.............................................................................. 99
5.8.3.5. Manual Calibration of the Analog Outputs Configured for Voltage Ranges............................... 100
5.8.3.6. Manual Adjustment of Current Loop Output Span and Offset .................................................. 102
5.8.3.7. Turning an Analog Output Over-Range Feature ON/OFF........................................................ 105
5.8.3.8. Adding a Recorder Offset to an Analog Output........................................................................ 106
5.8.3.9. AIN Calibration ....................................................................................................................... 107
5.8.3.10. Analog Inputs (XIN1…XIN8) Option Configuration................................................................. 108
5.8.4. Electrical Test................................................................................................................................ 108
5.8.5. Dark Calibration............................................................................................................................. 109
5.8.6. Pressure Calibration ...................................................................................................................... 109
5.8.7. Flow Calibration............................................................................................................................. 109
5.8.8. Test Chan Output .......................................................................................................................... 110

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5.8.8.1. Selecting a Test Channel Function for Output A4.................................................................... 110
5.9. SETUP MORE ALRM (Option): Using the Gas Concentration Alarms .......................................... 112
5.9.1. Setting the GFC7002T Concentration Alarm Limits ........................................................................ 112
5.9.2. APR OPtion and Configuration....................................................................................................... 113
6. COMMUNICATIONS SETUP AND OPERATION ............................................................. 115
6.1. Data Terminal/Communication Equipment (DTE DCE)......................................................................... 115
6.2. Communication Modes, BaudRateandPortTesting............................................................................... 115
6.2.1. Communication Modes .................................................................................................................. 115
6.2.2. COM Port Baud Rate..................................................................................................................... 117
6.2.3. Com Port Testing........................................................................................................................... 118
6.3. RS-232................................................................................................................................................ 119
6.4. RS-485 (Option) .................................................................................................................................. 120
6.5. Ethernet .............................................................................................................................................. 120
6.5.1. Configuring Ethernet Communication Manually (Static IP Address)................................................ 121
6.5.2. Configuring Ethernet Communication Using Dynamic Host Configuration Protocol (DHCP)............ 122
6.5.3. Changing the Analyzer’s HOSTNAME............................................................................................ 123
6.6. USB Port (Option) for Remote Access ................................................................................................. 125
7. DATA ACQUISITION SYSTEM (DAS) AND APICOM...................................................... 127
7.1. DAS Structure ..................................................................................................................................... 128
7.1.1. DAS Data Channels....................................................................................................................... 128
7.1.2. Default DAS Channels................................................................................................................... 129
7.1.3. Viewing DAS Channels and Individual Records.............................................................................. 132
7.1.4. Editing DAS Channels ................................................................................................................... 133
7.1.4.1. Editing DAS Data Channel Names.......................................................................................... 134
7.1.5. Editing DAS Triggering Events....................................................................................................... 135
7.1.6. Editing DAS Parameters................................................................................................................ 136
7.1.7. Sample Period and Report Period.................................................................................................. 138
7.1.8. Number of Records........................................................................................................................ 140
7.1.9. RS-232 Report Function ................................................................................................................ 141
7.1.9.1. The Compact Report Feature.................................................................................................. 141
7.1.9.2. The Starting Date Feature....................................................................................................... 142
7.1.10. Disabling/Enabling Data Channels ............................................................................................... 142
7.1.11. HOLDOFF Feature ...................................................................................................................... 143
7.2. Remote DAS Configuration.................................................................................................................. 144
7.2.1. DAS Configuration via APICOM..................................................................................................... 144
7.2.2. DAS Configuration Using Terminal Emulation Programs ................................................................ 146
8. REMOTE OPERATION..................................................................................................... 147
8.1. Computer Mode................................................................................................................................... 147
8.1.1. Remote Control via APICOM ......................................................................................................... 147
8.2. Interactive Mode.................................................................................................................................. 147
8.2.1. Remote Control via a Terminal Emulation Program........................................................................ 148
8.2.1.1. Help Commands in Interactive Mode....................................................................................... 148
8.2.1.2. Command Syntax................................................................................................................... 148
8.2.1.3. Data Types............................................................................................................................. 149
8.2.1.4. Status Reporting..................................................................................................................... 150
8.2.1.5. General Message Format ....................................................................................................... 150
8.3. Remote Access by Modem.................................................................................................................. 150
8.4. Password Security for Serial Remote Communications........................................................................ 153
9. CALIBRATION PROCEDURES........................................................................................ 155
9.1. Calibration Preparations ...................................................................................................................... 155
9.1.1. Required Equipment, Supplies, and Expendables.......................................................................... 156
9.1.1.1. Zero Air .................................................................................................................................. 156
9.1.1.2. Span Gas............................................................................................................................... 156
9.1.1.3. Calibration Gas Standards and Traceability............................................................................. 156
9.1.2. Data Recording Devices ................................................................................................................ 157

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9.2. Manual Calibration............................................................................................................................... 157
9.2.1. Setup for Basic Calibration Checks and Calibration........................................................................ 157
9.2.2. Performing a Basic Manual Calibration Check................................................................................ 159
9.2.2.1. Setting the Expected Span Gas Concentration........................................................................ 160
9.2.2.2. Zero/Span Point Calibration Procedure................................................................................... 162
9.2.3. Setup for Calibration Using Valve Options...................................................................................... 163
9.2.4. Manual Calibration Checks with Valve Options Installed................................................................. 165
9.2.4.1. Setting the Expected Span Gas Concentration........................................................................ 166
9.2.4.2. Zero/Span Point Calibration Procedure................................................................................... 167
9.2.4.3. Use of Zero/Span Valve with Remote Contact Closure............................................................ 169
9.3. Automatic Zero/Span Cal/Check (AutoCal) .......................................................................................... 169
9.3.1. SETUP ACAL: Programming and AUTO CAL Sequence ........................................................... 172
9.3.1.1. AutoCal with Auto or Dual Reporting Ranges Modes Selected................................................ 174
9.4. N2O Calibration Quality........................................................................................................................ 175
9.5. Calibration of the GFC7002T/GFC7002TU Electronic Subsystems ...................................................... 177
9.5.1. Dark Calibration Test..................................................................................................................... 177
9.5.2. Pressure Calibration ...................................................................................................................... 178
9.5.3. Flow Calibration............................................................................................................................. 179
9.6. Calibration of Optional Sensors............................................................................................................ 180
9.6.1. O2Sensor Calibration .................................................................................................................... 180
9.6.1.1. O2 Pneumatics Connections................................................................................................... 180
9.6.1.2. Set O2 Span Gas Concentration............................................................................................. 180
9.6.1.3. Activate O2 Sensor Stability Function ..................................................................................... 182
9.6.1.4. O2 ZERO/SPAN CALIBRATION............................................................................................. 183
9.6.2. CO2Sensor Calibration Procedure................................................................................................. 184
9.6.2.1. CO2Pneumatics Connections................................................................................................. 184
9.6.2.2. Set CO2 Span Gas Concentration: ......................................................................................... 184
9.6.2.3. Activate CO2 Sensor Stability Function................................................................................... 186
9.6.2.4. CO2 Zero/Span Calibration..................................................................................................... 187
PART III TECHNICAL INFORMATION................................................................................ 189
10. MAINTENANCE SCHEDULE & PROCEDURES............................................................ 191
10.1. Maintenance Schedule...................................................................................................................... 191
10.2. Predicting Failures Using the Test Functions ..................................................................................... 195
10.3. Maintenance Procedures................................................................................................................... 196
10.3.1. Replacing the Sample Particulate Filter........................................................................................ 196
10.3.2. Performing Leak Checks.............................................................................................................. 197
10.3.2.1. Pressure Leak Check............................................................................................................ 197
10.3.3. Performing a Sample Flow Check................................................................................................ 197
10.3.4. Cleaning the Optical Bench.......................................................................................................... 198
10.3.5. Cleaning Exterior Surfaces of the GFC7002T/GFC7002TU .......................................................... 198
11. TROUBLESHOOTING AND SERVICE........................................................................... 199
11.1. General Troubleshooting................................................................................................................... 199
11.1.1. Fault Diagnosis with WARNING Messages .................................................................................. 200
11.1.2. Fault Diagnosis with TEST Functions........................................................................................... 203
11.1.3. the Diagnostic Signal I/O Function ............................................................................................... 205
11.1.4. Status LEDs................................................................................................................................. 206
11.1.4.1. Motherboard Status Indicator (Watchdog)............................................................................. 207
11.1.4.2. Sync Demodulator Status LEDs............................................................................................ 208
11.1.4.3. Relay Board Status LEDs ..................................................................................................... 209
11.2. Gas Flow Problems........................................................................................................................... 211
11.2.1. GFC7002T/GFC7002TU Internal Gas Flow Diagrams.................................................................. 212
11.2.2. Typical Sample Gas Flow Problems............................................................................................. 214
11.2.2.1. Flow is Zero.......................................................................................................................... 214
11.2.2.2. Low Flow.............................................................................................................................. 214
11.2.2.3. High Flow ............................................................................................................................. 215

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11.2.2.4. Displayed Flow = “Warnings” ................................................................................................ 215
11.2.2.5. Actual Flow Does Not Match Displayed Flow ........................................................................ 215
11.3. Calibration Problems......................................................................................................................... 215
11.3.1. Miscalibrated ............................................................................................................................... 215
11.3.2. Non-Repeatable Zero and Span................................................................................................... 216
11.3.3. Inability to Span – No SPAN Button (CALS)................................................................................. 216
11.3.4. Inability to Zero – No ZERO Button (CALZ).................................................................................. 216
11.4. Other Performance Problems ............................................................................................................ 216
11.4.1. Temperature Problems ................................................................................................................ 217
11.4.1.1. Box or Sample Temperature ................................................................................................. 217
11.4.1.2. Bench Temperature.............................................................................................................. 217
11.4.1.3. GFC Wheel Temperature...................................................................................................... 218
11.4.1.4. IR Photo-Detector TEC Temperature .................................................................................... 218
11.4.2. Excessive Noise .......................................................................................................................... 219
11.5. Subsystem Checkout......................................................................................................................... 219
11.5.1. AC Mains Configuration ............................................................................................................... 220
11.5.2. DC Power Supply......................................................................................................................... 220
11.5.3. I2C Bus ........................................................................................................................................ 221
11.5.4. Touchscreen Interface ................................................................................................................. 221
11.5.5. LCD Display Module .................................................................................................................... 221
11.5.6. Relay Board................................................................................................................................. 221
11.5.7. Sensor Assembly......................................................................................................................... 222
11.5.7.1. Sync/Demodulator Assembly................................................................................................ 222
11.5.7.2. Electrical Test....................................................................................................................... 222
11.5.7.3. Opto Pickup Assembly.......................................................................................................... 223
11.5.7.4. GFC Wheel Drive.................................................................................................................. 223
11.5.7.5. IR Source ............................................................................................................................. 224
11.5.7.6. Pressure/Flow Sensor Assembly........................................................................................... 224
11.5.8. Motherboard ................................................................................................................................ 225
11.5.8.1. A/D Functions....................................................................................................................... 225
11.5.8.2. Test Channel / Analog Outputs Voltage................................................................................. 225
11.5.8.3. Analog Outputs: Current Loop............................................................................................... 226
11.5.8.4. Status Outputs...................................................................................................................... 227
11.5.8.5. Control Inputs – Remote Zero, Span..................................................................................... 227
11.5.9. CPU............................................................................................................................................. 228
11.5.10. RS-232 Communications ........................................................................................................... 228
11.5.10.1. General RS-232 Troubleshooting........................................................................................ 228
11.5.10.2. Troubleshooting Analyzer/Modem or Terminal Operation.................................................... 229
11.5.11. The Optional CO2Sensor........................................................................................................... 229
11.6. Repair Procedures ............................................................................................................................ 230
11.6.1. Repairing Sample Flow Control Assembly.................................................................................... 230
11.6.2. Removing/Replacing the GFC Wheel........................................................................................... 231
11.6.3. Checking and Adjusting the Sync/Demodulator, Circuit Gain (N2O MEAS)................................... 233
11.6.3.1. Checking the Sync/Demodulator Circuit Gain........................................................................ 233
11.6.3.2. Adjusting the Sync/Demodulator, Circuit Gain....................................................................... 234
11.6.4. Disk-On-Module Replacement ..................................................................................................... 235
11.7. Frequently Asked Questions.............................................................................................................. 236
11.8. Technical Assistance......................................................................................................................... 237
12. THEORY OF OPERATION.............................................................................................. 239
12.1. Measurement Method........................................................................................................................ 239
12.1.1. Beer’s Law................................................................................................................................... 239
12.2. Measurement Fundamentals............................................................................................................. 240
12.2.1. Gas Filter Correlation................................................................................................................... 241
12.2.1.1. The GFC Wheel.................................................................................................................... 241
12.2.1.2. The Measure Reference Ratio .............................................................................................. 242
12.2.1.3. Summary Interference Rejection........................................................................................... 244

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12.3. Flow Rate Control.............................................................................................................................. 245
12.3.1.1. Critical Flow Orifice............................................................................................................... 245
12.3.2. Particulate Filter........................................................................................................................... 246
12.3.3. Pneumatic Sensors...................................................................................................................... 247
12.3.3.1. Sample Pressure Sensor ...................................................................................................... 247
12.3.3.2. Sample Flow Sensor............................................................................................................. 247
12.4. Electronic Operation.......................................................................................................................... 247
12.4.1. CPU............................................................................................................................................. 249
12.4.1.1. Disk-On-Module (DOM) ........................................................................................................ 249
12.4.1.2. Flash Chip............................................................................................................................ 249
12.4.2. Optical Bench & GFC Wheel........................................................................................................ 250
12.4.2.1. Temperature Control............................................................................................................. 250
12.4.2.2. IR Source ............................................................................................................................. 250
12.4.2.3. GFC Wheel........................................................................................................................... 250
12.4.2.4. IR Photo-Detector................................................................................................................. 252
12.4.3. Synchronous Demodulator (Sync/Demod) Assembly.................................................................... 252
12.4.3.1. Signal Synchronization and Demodulation ............................................................................ 253
12.4.3.2. Sync/Demod Status LEDs..................................................................................................... 254
12.4.3.3. Photo-Detector Temperature Control .................................................................................... 254
12.4.3.4. Dark Calibration Switch......................................................................................................... 255
12.4.3.5. Electric Test Switch .............................................................................................................. 255
12.4.4. Relay Board................................................................................................................................. 255
12.4.4.1. Heater Control...................................................................................................................... 255
12.4.4.2. GFC Wheel Motor Control..................................................................................................... 255
12.4.4.3. Zero/Span Valve Options...................................................................................................... 256
12.4.4.4. IR Source ............................................................................................................................. 256
12.4.4.5. Status LEDs ......................................................................................................................... 256
12.4.4.6. I2C Watch Dog Circuitry........................................................................................................ 257
12.4.5. MotherBoard................................................................................................................................ 257
12.4.5.1. A to D Conversion................................................................................................................. 257
12.4.5.2. Sensor Inputs ....................................................................................................................... 258
12.4.5.3. Thermistor Interface.............................................................................................................. 258
12.4.5.4. Analog Outputs..................................................................................................................... 259
12.4.5.5. Internal Digital I/O................................................................................................................. 259
12.4.5.6. External Digital I/O................................................................................................................ 259
12.4.6. I2C Data Bus................................................................................................................................ 259
12.4.7. Power Supply/ Circuit Breaker...................................................................................................... 260
12.4.8. Front Panel Touchscreen/Display Interface.................................................................................. 262
12.4.8.1. LVDS Transmitter Board....................................................................................................... 262
12.4.8.2. Front Panel Touchscreen/Display Interface PCA................................................................... 262
12.5. Software Operation ........................................................................................................................... 263
12.5.1. Adaptive Filter.............................................................................................................................. 263
12.5.2. Calibration - Slope and Offset ...................................................................................................... 264
12.5.3. Measurement Algorithm............................................................................................................... 264
12.5.4. Temperature and Pressure Compensation................................................................................... 264
12.5.5. Internal Data Acquisition System (DAS) ....................................................................................... 264
13. A PRIMER ON ELECTRO-STATIC DISCHARGE .......................................................... 265
13.1. How Static Charges are Created ....................................................................................................... 265
13.2. How Electro-Static Charges Cause Damage...................................................................................... 266
13.3. Common Myths About ESD Damage................................................................................................. 267
13.4. Basic Principles of Static Control....................................................................................................... 268
13.4.1. General Rules.............................................................................................................................. 268
13.4.2. Basic anti-ESD Procedures for Analyzer Repair and Maintenance................................................ 269
13.4.2.1. Working at the Instrument Rack............................................................................................ 269
13.4.2.2. Working at an Anti-ESD Work Bench.................................................................................... 270
13.4.2.3. Transferring Components from Rack to Bench and Back....................................................... 270

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Teledyne Analytical Instruments xiii
13.4.2.4. Opening Shipments from Teledyne Customer Service........................................................... 271
13.4.2.5. Packing Components for Return to Teledyne Customer Service............................................ 271
GLOSSARY 273
LIST OF APPENDICES
APPENDIX A - VERSION SPECIFIC SOFTWARE DOCUMENTATION
APPENDIX B - GFC7002T/GFC7002TU SPARE PARTS LIST
APPENDIX C - REPAIR QUESTIONNAIRE - GFC7002T
APPENDIX D - SCHEMATICS
LIST OF FIGURES
Figure 3-1: Front Panel Layout................................................................................................................. 13
Figure 3-2: Display Screen and Touch Control ......................................................................................... 14
Figure 3-3: Display/Touch Control Screen Mapped to Menu Charts.......................................................... 16
Figure 3-4: Rear Panel Layout.................................................................................................................. 17
Figure 3-5: Internal Layout – GFC7002T .................................................................................................. 19
Figure 3-6: Internal Layout – GFC7002TU................................................................................................ 20
Figure 3-7: Optical Bench Layout (shorter bench, GFC7002TU, shown)................................................... 21
Figure 3-8: Analog In Connector............................................................................................................... 23
Figure 3-9: Analog Output Connector....................................................................................................... 24
Figure 3-10: Current Loop Option Installed on Motherboard ....................................................................... 25
Figure 3-11: Status Output Connector........................................................................................................ 26
Figure 3-12: Control Input Connector ......................................................................................................... 28
Figure 3-13: Concentration Alarm Relay..................................................................................................... 29
Figure 3-14: Rear Panel Connector Pin-Outs for RS-232 Mode.................................................................. 32
Figure 3-15: Default Pin Assignments for CPU COM Port connector (RS-232) ........................................... 33
Figure 3-16: Jumper and Cables for Multidrop Mode.................................................................................. 35
Figure 3-17: RS-232-Multidrop PCA Host/Analyzer Interconnect Diagram.................................................. 36
Figure 3-18: Pneumatic Connections–Basic Configuration–Using Bottled Span Gas................................... 39
Figure 3-19: Pneumatic Connections–Basic Configuration–Using Gas Dilution Calibrator........................... 39
Figure 3-20: GFC7002T/GFC7002TU Internal Gas Flow............................................................................ 40
Figure 3-21: Pneumatic Connections – Option Z/S Valve with Shutoff Valve for Pressurized Span and
Atmospheric Zero................................................................................................................... 41
Figure 3-22. Pneumatics: Option Z/S without Shutoff Valve........................................................................ 41
Figure 3-23 Internal Pneumatic Flow OPT 50A – Zero/Span Valves .......................................................... 44
Figure 3-24: Internal Pneumatic Flow – Zero/Span/Shutoff Valves (Opt 50B).............................................. 45
Figure 3-225. Pneumatics: Option Z/S Valve with Common Shutoff Valve for Pressurized Zero and Span.... 46
Figure 3-26: Zero/Span Calibration Procedure............................................................................................ 57
Figure 4-1: Front Panel Display................................................................................................................ 61
Figure 4-2: Viewing GFC7002T/GFC7002TU Test Functions.................................................................... 63
Figure 4-3: Viewing and Clearing GFC7002T/GFC7002TU WARNING Messages.................................... 66
Figure 5-1: Analog Output Connector Pin Out........................................................................................... 71
Figure 5-2: COMM– Machine ID............................................................................................................... 85
Figure 5-3: Accessing the Analog I/O Configuration Submenus................................................................ 93
Figure 5-4: Setup for Checking / Calibrating DCV Analog Output Signal Levels...................................... 100
Figure 5-5: Setup for Checking / Calibration Current Output Signal Levels Using an Ammeter................ 102
Figure 5-6: Alternative Setup Using 250Ω Resistor for Checking Current Output Signal Levels ............... 104
Figure 5-7. DIAG – Analog Inputs (Option) Configuration Menu.............................................................. 108
Figure 6-1: COM1[2] – Communication Modes Setup............................................................................. 117
Figure 6-2: COMM Port Baud Rate......................................................................................................... 118
Figure 6-3: COMM – COM1 Test Port .................................................................................................... 119

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Teledyne Analytical Instruments xiv
Figure 6-4: COMM – LAN / Internet Manual Configuration...................................................................... 122
Figure 6-5 : COMM – LAN / Internet Automatic Configuration (DHCP)..................................................... 123
Figure 7-1: Default DAS Channel Setup................................................................................................. 131
Figure 7-2: APICOM Remote Control Program Interface......................................................................... 144
Figure 7-3: APICOM User Interface for Configuring the DAS.................................................................. 145
Figure 7-4: DAS Configuration Through a Terminal Emulation Program.................................................. 146
Figure 9-1: Pneumatic Connections – Basic Configuration – Using Bottled Span Gas............................. 158
Figure 9-2: Pneumatic Connections – Basic Configuration – Using Gas Dilution Calibrator..................... 158
Figure 9-3: Pneumatic Connections – Option Z/S: Ambient Zero/Pressurized Span Calibration Valves... 163
Figure 9-4: Pneumatic Connections – Option Z/S Without Shutoff Valve................................................. 164
Figure 9-5: Pneumatic Connections – Option Z/S Valve with Common Shutoff Valve for Pressurized Zero
and Span ............................................................................................................................. 164
Figure 9-6: O2Sensor Calibration Set Up............................................................................................... 180
Figure 9-7: CO2Sensor Calibration Set Up............................................................................................. 184
Figure 10-1: Sample Particulate Filter Assembly ...................................................................................... 196
Figure 11-1: Viewing and Clearing Warning Messages............................................................................. 202
Figure 11-2: Example of Signal I/O Function ............................................................................................ 206
Figure 11-3: CPU Status Indicator............................................................................................................ 207
Figure 11-4: Sync/Demod Board Status LED Locations............................................................................ 208
Figure 11-5: Relay Board Status LEDs..................................................................................................... 209
Figure 11-6: GFC7002T/GFC7002TU – Basic Internal Gas Flow.............................................................. 212
Figure 11-7: Internal Pneumatic Flow OPT 50A – Zero/Span Valves (OPT 50A & 50B) ............................ 212
Figure 11-8: Internal Pneumatic Flow OPT 50B – Zero/Span/Shutoff Valves ........................................... 213
Figure 11-9: GFC7002T/GFC7002TU – Internal Pneumatics with O2Sensor Option 65A.......................... 213
Figure 11-10: GFC7002T/GFC7002TU – Internal Pneumatics with CO2Sensor Option 67A....................... 214
Figure 11-11: Location of Diagnostic LEDs on CO2Sensor PCA ................................................................ 229
Figure 11-12: Critical Flow Restrictor Assembly/Disassembly..................................................................... 230
Figure 11-13: Opening the GFC Wheel Housing......................................................................................... 231
Figure 11-14: Removing the Opto-Pickup Assembly................................................................................... 232
Figure 11-15: Removing the GFC Wheel Housing...................................................................................... 232
Figure 11-16: Removing the GFC Wheel.................................................................................................... 233
Figure 11-17: Location of Sync/Demod Housing Mounting Screws............................................................. 234
Figure 11-18: Location of Sync/Demod Gain Potentiometer........................................................................ 234
Figure 12-1: Measurement Fundamentals................................................................................................ 240
Figure 12-2: GFC Wheel.......................................................................................................................... 241
Figure 12-3: Measurement Fundamentals with GFC Wheel...................................................................... 242
Figure 12-4: Affect of N2O in the Sample on N2O MEAS & N2O REF....................................................... 243
Figure 12-5: Effects of Interfering Gas on N2O MEAS & N2O REF........................................................... 244
Figure 12-6: Chopped IR Signal............................................................................................................... 244
Figure 12-7: Internal Pneumatic Flow – Basic Configuration .................................................................... 245
Figure 12-8: Flow Control Assembly & Critical Flow Orifice....................................................................... 246
Figure 12-9: Electronic Block Diagram ..................................................................................................... 248
Figure 12-10. CPU Board........................................................................................................................... 249
Figure 12-11: GFC Light Mask................................................................................................................... 251
Figure 12-12: Segment Sensor and M/R Sensor Output............................................................................. 252
Figure 12-13: GFC7002T/GFC7002TU Sync/Demod Block Diagram.......................................................... 253
Figure 12-14: Sample & Hold Timing.......................................................................................................... 254
Figure 12-15: Location of relay board Status LEDs..................................................................................... 257
Figure 12-16: Power Distribution Block Diagram......................................................................................... 261
Figure 12-17: Front Panel and Display Interface Block Diagram................................................................. 262
Figure 12-18: Basic Software Operation..................................................................................................... 263
Figure 13-1: Triboelectric Charging .......................................................................................................... 265
Figure 13-2: Basic anti-ESD Workbench .................................................................................................. 268

Table of Contents Model GFC7002T N2O Analyzer
Teledyne Analytical Instruments xv
LIST OF TABLES
Table 1-1: Analyzer Options...................................................................................................................... 5
Table 2-1: GFC7002T/GFC7002TU Basic Unit Specifications ................................................................... 9
Table 3-1: Ventilation Clearance ............................................................................................................. 12
Table 3-2: Display Screen and Touch Control Description....................................................................... 15
Table 3-3: Rear Panel Description........................................................................................................... 18
Table 3-4: Analog Input Pin Assignments................................................................................................ 23
Table 3-5: Analog Output Pin-Outs.......................................................................................................... 24
Table 3-6: Status Output Signals............................................................................................................. 27
Table 3-7: Control Input Signals.............................................................................................................. 28
Table 3-8: Zero/Span Valve Operating States for Option 50A.................................................................. 44
Table 3-9: Zero/Span Valve Operating States for Option 50B.................................................................. 45
Table 3-10: Zero/Span Valve Operating States for Option 50E.................................................................. 46
Table 3-11: Possible Warning Messages at Start-Up................................................................................. 49
Table 3-12: Possible Startup Warning Messages – GFC7002T Analyzers with Options............................. 50
Table 4-1: Analyzer Operating Modes ..................................................................................................... 62
Table 4-2: Test Functions Defined........................................................................................................... 64
Table 4-3: List of Warning Messages ...................................................................................................... 65
Table 4-4: Primary Setup Mode Features and Functions......................................................................... 67
Table 4-5: Secondary Setup Mode (SETUP>MORE) Features and Functions ......................................... 68
Table 5-1: GFC7002T Family Physical Range by Model.......................................................................... 72
Table 5-2: Password Levels....................................................................................................................81
Table 5-3: Variable Names (VARS)......................................................................................................... 86
Table 5-4: Diagnostic Mode (DIAG) Functions......................................................................................... 88
Table 5-5: DIAG - Analog I/O Functions .................................................................................................. 92
Table 5-6: Analog Output Voltage Ranges .............................................................................................. 94
Table 5-7: Voltage Tolerances for the TEST CHANNEL Calibration....................................................... 100
Table 5-8: Current Loop Output Check.................................................................................................. 104
Table 5-9: Test Channels Functions available on the GFC7002T/GFC7002TU’s Analog Output............ 110
Table 5-10: N2O Concentration Alarm Default Settings............................................................................ 112
Table 6-1: COMM Port Communication Modes ..................................................................................... 116
Table 6-2: Ethernet Status Indicators .................................................................................................... 120
Table 6-3: LAN/Internet Default Configuration Properties ...................................................................... 121
Table 7-1: Front Panel LED Status Indicators for DAS........................................................................... 127
Table 7-2: DAS Data Channel Properties.............................................................................................. 129
Table 7-3: DAS Data Parameter Functions............................................................................................ 136
Table 8-1: Interactive Mode Software Commands ................................................................................. 148
Table 8-2: Teledyne’s Serial I/O Command Types................................................................................. 149
Table 9-1: AUTOCAL Modes ................................................................................................................ 169
Table 9-2: AutoCal Attribute Setup Parameters..................................................................................... 170
Table 9-3: Example AutoCal Sequence................................................................................................. 171
Table 9-4: Calibration Data Quality Evaluation ...................................................................................... 175
Table 10-1: GFC7002T/GFC7002TU Maintenance Schedule .................................................................. 193
Table 10-2: GFC7002T/GFC7002TU Test Function Record .................................................................... 194
Table 10-3: Predictive uses for Test Functions........................................................................................ 195
Table 11-1: Warning Messages - Indicated Failures................................................................................ 202
Table 11-2: Test Functions - Indicated Failures....................................................................................... 204
Table 11-3: Sync/Demod Board Status Failure Indications ...................................................................... 208
Table 11-4: I2C Status LED Failure Indications........................................................................................ 209
Table 11-5: Relay Board Status LED Failure Indications.......................................................................... 210
Table 11-6: DC Power Test Point and Wiring Color Codes...................................................................... 220
Table 11-7: DC Power Supply Acceptable Levels.................................................................................... 220

Table of Contents Model GFC7002T N2O Analyzer
Teledyne Analytical Instruments xvi
Table 11-8: Relay Board Control Devices................................................................................................ 222
Table 11-9: Opto Pickup Board Nominal Output Frequencies.................................................................. 223
Table 11-10: Analog Output Test Function - Nominal Values Voltage Outputs........................................... 225
Table 11-11: Analog Output Test Function - Nominal Values Voltage Outputs........................................... 226
Table 11-12: Status Outputs Check .......................................................................................................... 227
Table 12-1: Absorption Path Lengths for GFC7002T and GFC7002TU.................................................... 240
Table 12-2: Sync DEMOD Sample and Hold Circuits............................................................................... 254
Table 12-3: Sync/Demod Status LED Activity.......................................................................................... 254
Table 12-4: Relay Board Status LEDs..................................................................................................... 256
Table 13-1: Static Generation Voltages for Typical Activities ................................................................... 266
Table 13-2: Sensitivity of Electronic Devices to Damage by ESD............................................................. 266

Part I General Information Model GFC7002T N2O Analyzer
Teledyne Analytical Instruments 1
PART I
GENERAL INFORMATION

Part I General Information Model GFC7002T N2O Analyzer
Teledyne Analytical Instruments 2
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Introduction Model GFC7002T N2O Analyzer
Teledyne Analytical Instruments 3
1. INTRODUCTION, FEATURES AND OPTIONS
This section provides an overview of the Model GFC7002T or GFC7002TU Analyzer,
its features and its options, followed by a description of how this user manual is
arranged.
1.1. GFC7002T FAMILY OVERVIEW
The family includes the GFC7002T and the GFC7002TU Gas Filter Correlation Carbon
Monoxide Analyzer. The GFC7002T family of analyzers is a microprocessor-controlled
analyzer that are designed to measure low level and trace level nitrous oxide (N2O),
respectively. The primary difference between the models is their maximum operating
range; 1000 ppm for the GFC7002T and 200 ppm for the GFC7002TU. These
instruments are designed to be used for monitoring background levels of N2O in the
atmosphere, byproducts of combustion products and contamination of bottled gases.
It uses a method based on the Beer-Lambert law, an empirical relationship that relates
the absorption of light to the properties of the material through which the light is
traveling over a defined distance. In this case the light is infrared radiation (IR)
traveling through a sample chamber filled with gas bearing a varying concentration of
N2O.
The GFC7002T/GFC7002TU uses Gas Filter Correlation (GFC) to overcome the
interfering effects of various other gases (such as water vapor) that also absorb IR. The
analyzer passes the IR beam through a spinning wheel made up of two separate
chambers: one containing a high concentration of N2O known as the reference, and the
other containing a neutral gas known as the measure. The concentration of N2O in the
sample chamber is computed by taking the ratio of the instantaneous measure and
reference values and then compensating the ratio for sample temperature and pressure.
The GFC7002T/GFC7002TU Analyzer’s multi-tasking software gives the ability to
track and report a large number of operational parameters in real time. These readings
are compared to diagnostic limits kept in the analyzers memory and should any fall
outside of those limits the analyzer issues automatic warnings.
Built-in data acquisition capability, using the analyzer's internal memory, allows the
logging of multiple parameters including averaged or instantaneous concentration
values, calibration data, and operating parameters such as pressure and flow rate. Stored
data are easily retrieved through the serial port or Ethernet port via APICOM software or
from the front panel, allowing operators to perform predictive diagnostics and enhanced
data analysis by tracking parameter trends. Multiple averaging periods of one minute to
365 days are available for over a period of one year.