Teledyne gfc 7000ta User Manual

MODEL GFC 7000TA

CARBON DIOXIDE ANALYZER

Operation Manual

Also supports operation of:

GFC 7000T CO2 Analyzer

(when used in conjunction with GFC 7000T Addendum, PN 07273)

P/N M07272

DATE 06/04/13

TELEDYNE ELECTRONIC TECHNOLOGIES

Analytical Instruments

16830 Chestnut Street
City of Industry, CA 91748

Telephone: [phone]
Fax: [phone]

Web: www.teledyne-ai.com

Teledyne Analytical Instruments

Model GFC7000TA Carbon Dioxide Analyzer

Copyright © 2013 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 instrume nt o r its int e rfac e 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.

Teledyne Analytical Instruments ii

Model GFC7000TA Carbon Dioxide Analyzer

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Teledyne Analytical Instruments iii

Safety Messages Model GFC7000TA Carbon Dioxide Analyzer

SAFETY MESSAGES

Important safety messages are provided throughout this manual for the purpose of avoiding personal
injury or instrument damage. Please read these messages carefully. Each safety message is associated
with a safety alert symbol, and are placed throughout this manual; the safety symbols are also located
inside the instrument.

descriptions of which are as follows:

It is imperative that you pay close attention to these messages, the

WARNING: Electrical Shock Hazard

HAZARD: Strong oxidizer

GENERAL WARNING/CAUTION: Read the accompanying message for

specific information.

CAUTION: Hot Surface Warning

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.

Technician Symbol: All operations marked with this symbol are to be
performed by qualified maintenance personnel only.

Electrical Ground: This symbol inside the instrument marks the central
safety grounding point for the instrument.

CAUTION

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 GFC7001TA 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/

Teledyne Analytical Instruments v

Safety Messages Model GFC7000TA Carbon Dioxide Analyzer

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!

Teledyne Analytical Instruments vi

Safety Messages Model GFC7000TA Carbon Dioxide Analyzer

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Teledyne Analytical Instruments vii

Manual Information Model GFC7000TA Carbon Dioxide Analyzer

ABOUT THIS MANUAL

This manual, PN 07272, provides operation instructions for the GFC 7000TA Analyzer,
and supports operation of the Model GFC 7000T (when used in conjunction with the
GFC 7000T Addendum, PN 07273). This manual is comprised of multiple documents as
listed below.

Part No. Rev Name/Description

07272 A GFC 7000TA Carbon Dioxide Analyzer Operation Manual

05233 H Menu trees and software documentation (inserted as Appendix A of this manual)

06879

04411 M Recommended Spare Parts Stocking Levels
05235 C Repair Request Questionnaire (inserted as Appendix C of this manual)

0691201 B Interconnect Wire List (located in Appendix D of this manual)

069121 B Interconnect Wiring Diagram (located in Appendix D of this manual)

03297 K PCA, 03296, IR Photodetector Preamp and Sync Demodulator

03632 A PCA, 03631, 0-20mA driver

04003 N PCA, 04003, Pressure/Flow Transducer Interface

04089 A PCA, 04088, Opto Pickup Interface

04136 B PCA, 04135 Rev A, Relay

04468 B PCA, 04467, Analog Output Series Res

05803 B SCH, PCA 05802, MOTHERBOARD, GEN-5

06698 D SCH, PCA 06697, INTRFC, LCD TCH SCRN,

06882 B SCH, LVDS TRANSMITTER BOARD

06731 A SCH, AUXILLIARY-I/O BOARD

1/4/2011

Interconnects and Schematics included in Appendix D of this manual

Spare Parts List (located in Appendix B, this manual)

NOTE

Please read this manual in its entirety before operating the instrument.

Teledyne Analytical Instruments ix

Manual Information Model GFC7000TA Carbon Dioxide Analyzer

2010, T360 Manual, PN0 Rev A, DCN

Document PN Rev DCN Change Summary

For the purpose of capturing this manual’s construct at its initial release, the following list documents the
current Rev of each part comprising Rev A of this manual. Any future changes to this manual will be
recorded in this Revision History section, most recent changes at the top. Their new Rev letters will be
updated in the preceding About This Manual section:

0xxxx

X Initial Release

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Table of Contents Model GFC7000TA Carbon Dioxide Analyzer

TABLE OF CONTENTS

SAFETY MESSAGES ............................................................................................................................................... v

CONSIGNES DE SÉCURITÉ ................................................................................................................................... vi

ABOUT this MANUAL .............................................................................................................................................. ix

TABLE OF CONTENTS ........................................................................................................................................... xi

1. INTRODUCTION ........................................................................................................................................................ 1

1.1. Features ............................................................................................................................................................. 1

1.2. Using This Manual .............................................................................................................................................. 1

2. SPECIFICATIONS AND APPROVALS ..................................................................................................................... 5

2.1. Specifications ..................................................................................................................................................... 5

2.2. CE Mark Compliance ......................................................................................................................................... 7

3. GETTING STARTED ................................................................................................................................................. 9

3.1. Unpacking and Initial Set Up .............................................................................................................................. 9

3.2. Front Panel ....................................................................................................................................................... 11

3.3. Rear Panel ....................................................................................................................................................... 15

3.4. Internal Layout ................................................................................................................................................. 17

3.5. Electrical Connections ...................................................................................................................................... 19

3.5.1. Power Connection .................................................................................................................................... 20

3.5.2. Connecting Analog Inputs (Option 64) ...................................................................................................... 20

3.5.3. Connecting Analog Outputs ...................................................................................................................... 21

3.5.4. Connecting the Status Outputs ................................................................................................................. 23

3.5.5. Connecting the Control Inputs .................................................................................................................. 24

3.5.6. Connecting the Communications Interfaces ............................................................................................. 25

3.6. Pneumatic Connections ................................................................................................................................... 25

3.6.1. Basic Pneumatic Connections .................................................................................................................. 26

3.6.2. Connections with Internal Valve Options Installed .................................................................................... 30

3.6.3. Pneumatic Connections in Multipoint Calibration Applications.................................................................. 32

3.6.4. Setting the Internal Purge Air Pressure .................................................................................................... 32

3.7. Initial Operation ................................................................................................................................................ 33

3.7.1. Startup ...................................................................................................................................................... 33

3.7.2. Warm Up................................................................................................................................................... 34

3.7.3. Warning Messages ................................................................................................................................... 34

3.7.4. Functional Check ...................................................................................................................................... 36

3.8. Initial Calibration Procedure ............................................................................................................................. 37

3.8.1. Initial O

4. FREQUENTLY ASKED QUESTIONS ..................................................................................................................... 45

4.1. FAQ’s ............................................................................................................................................................... 45

4.2. Glossary ........................................................................................................................................................... 46

5. OPTIONAL HARDWARE AND SOFTWARE .......................................................................................................... 51

5.1. Rack Mount Kits (Options 20A, 20B, 21 and 23) .............................................................................................. 51

5.2. Current Loop Analog Outputs (Option 41) ........................................................................................................ 51

5.2.1. Converting Current Loop Analog Outputs to Standard Voltage Outputs ................................................... 52

5.3. Expendable Kits (Options 42C, 42D and 43) .................................................................................................... 53

5.4. Calibration Valves Options ............................................................................................................................... 54

5.4.1. Ambient Zero/Pressurized Span Valve ..................................................................................................... 54

5.4.2. Ambient Zero/Ambient Span Valve ........................................................................................................... 55

5.5. Communication Options ................................................................................................................................... 57

5.5.1. Communications Cables ........................................................................................................................... 57

5.5.2. RS-232 Multidrop (Option 62) ................................................................................................................... 57

5.6. Oxygen Sensor (OPT 65) ................................................................................................................................. 58

5.6.1. Theory of Operation .................................................................................................................................. 58

5.7. Special Features .............................................................................................................................................. 61

5.7.1. Dilution Ratio Option ................................................................................................................................. 61

5.7.2. Maintenance Mode Switch ........................................................................................................................ 61

5.7.3. Second Language Switch ......................................................................................................................... 61

6. OPERATING INSTRUCTIONS ................................................................................................................................ 63

6.1. Overview of Operating modes .......................................................................................................................... 63

6.2. Sample Mode ................................................................................................................................................... 64

Sensor Calibration Procedure .................................................................................................... 40

2

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Table of Contents Model GFC7000TA Carbon Dioxide Analyzer

6.2.1. Test Functions .......................................................................................................................................... 65

6.2.2. Warning Messages ................................................................................................................................... 67

6.3. Calibration Mode .............................................................................................................................................. 68

6.4. SETUP MODE.................................................................................................................................................. 69

6.5. SETUP  CFG: Viewing the Analyzer’s Configuration Information ................................................................. 70

6.6. SETUP  ACAL: Automatic Calibration .......................................................................................................... 70

6.7. SETUP  DAS: Using the Data Acquisition System (DAS) ............................................................................. 71

6.7.1. DAS Structure ........................................................................................................................................... 72

6.7.2. Default DAS Channels .............................................................................................................................. 74

6.7.3. Remote DAS Configuration....................................................................................................................... 88

6.8. SETUP  RNGE: Analog Output Reporting Range Configuration .................................................................. 89

6.8.1. Physical Range versus Analog Output Reporting Ranges ........................................................................ 90

6.8.2. Reporting Range Modes ........................................................................................................................... 90

6.8.3. Single Range Mode (SNGL) ..................................................................................................................... 92

6.8.4. Dual Range Mode (DUAL) ........................................................................................................................ 93

6.8.5. Auto Range Mode (AUTO)........................................................................................................................ 94

6.8.6. Range Units .............................................................................................................................................. 95

6.8.7. Dilution Ratio ............................................................................................................................................ 96

6.9. SETUP  PASS: Password Feature ............................................................................................................... 97

6.10. SETUP  CLK: Setting the Internal Time-of-Day Clock ................................................................................ 99

6.11. SETUP  MORE COMM: Using the Analyzer’s Communication Ports .................................................... 101

6.11.1. Analyzer ID ........................................................................................................................................... 101

6.11.2. COM Port Default Settings .................................................................................................................... 102

6.11.3. RS-485 Configuration of COM2 ............................................................................................................ 105

6.11.4. DTE and DCE Communication ............................................................................................................. 105

6.11.5. COM Port Communication Modes ........................................................................................................ 106

6.11.6. Remote Access via the Ethernet ........................................................................................................... 108

6.11.7. Multidrop RS-232 Set Up ...................................................................................................................... 114

6.11.8. COM Port Baud Rate ............................................................................................................................ 116

6.11.9. COM Port Testing ................................................................................................................................. 117

6.12. SETUP  MORE  VARS: Internal Variables (VARS) ............................................................................... 118

6.13. SETUP  MORE  DIAG: Using the Diagnostics Functions ..................................................................... 120

6.13.1. Accessing the Diagnostic Features ....................................................................................................... 121

6.13.2. Signal I/O .............................................................................................................................................. 121

6.13.3. Analog Output Step Test ...................................................................................................................... 122

6.13.4. Analog I/O Configuration ...................................................................................................................... 123

6.13.5. Electric Test .......................................................................................................................................... 136

6.13.6. Dark Calibration Test ............................................................................................................................ 137

6.13.7. Pressure Calibration ............................................................................................................................. 138

6.13.8. Flow Calibration .................................................................................................................................... 139

6.13.9. Test Channel Output ............................................................................................................................. 140

6.14. SETUP MORE  ALRM: Using the Gas Concentration Alarms ............................................................... 141

6.14.1. Setting the Concentration Alarm Limits ................................................................................................. 142

6.15. Remote Operation of the Analyzer ............................................................................................................... 142

6.15.1. Remote Operation Using the External Digital I/O .................................................................................. 142

6.15.2. Remote Operation Using the External Serial I/O .................................................................................. 146

6.15.3. Additional Communications Documentation ......................................................................................... 153

6.15.4. Using the GFC 7000TA with a Hessen Protocol Network ..................................................................... 153

7. CALIBRATION PROCEDURES ............................................................................................................................ 161

7.1. Before Calibration ........................................................................................................................................... 161

7.1.1. Zero Air and Span Gas ........................................................................................................................... 161

7.1.2. Calibration Gas Traceability .................................................................................................................... 162

7.1.3. Data Recording Devices ......................................................................................................................... 162

7.2. Manual Calibration without Zero/Span Valves ................................................................................................ 162

7.3. Manual Calibration Checks ............................................................................................................................ 165

7.4. Manual Calibration with Zero/Span Valves ..................................................................................................... 166

7.5. Manual Calibration Checks with Zero/Span Valves ........................................................................................ 171

7.5.1. Zero/Span Calibration on Auto Range or Dual Ranges .......................................................................... 172

7.5.2. Use of Zero/Span Valves with Remote Contact Closure ........................................................................ 173

7.6. Automatic Zero/Span Cal/Check (AutoCal) .................................................................................................... 173

7.6.1. AutoCal with Auto or Dual Reporting Ranges Modes Selected .............................................................. 176

7.7. Calibration Quality .......................................................................................................................................... 176

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Table of Contents Model GFC7000TA Carbon Dioxide Analyzer

8. MAINTENANCE SCHEDULE & PROCEDURES .................................................................................................. 179

8.1. Maintenance Schedule ................................................................................................................................... 179

8.2. Predicting Failures Using the Test Functions ................................................................................................. 183

8.3. Maintenance Procedures ............................................................................................................................... 184

8.3.1. Replacing the Sample Particulate Filter .................................................................................................. 184

8.3.2. Rebuilding the Sample Pump ................................................................................................................. 185

8.3.3. Performing Leak Checks ........................................................................................................................ 185

8.3.4. Performing a Sample Flow Check .......................................................................................................... 186

8.3.5. Cleaning the Optical Bench .................................................................................................................... 186

8.3.6. Cleaning Exterior Surfaces of the GFC 7000TA ..................................................................................... 186

9. THEORY OF OPERATION .................................................................................................................................... 187

9.1. Measurement Method .................................................................................................................................... 187

9.1.1. Beer’s Law .............................................................................................................................................. 187

9.1.2. Measurement Fundamentals .................................................................................................................. 187

9.1.3. Gas Filter Correlation .............................................................................................................................. 188

9.1.4. Interference and Signal to Noise Rejection ............................................................................................. 190

9.2. Pneumatic Operation ...................................................................................................................................... 193

9.2.1. Sample Gas Flow ................................................................................................................................... 194

9.2.2. Flow Rate Control ................................................................................................................................... 194

9.2.3. Purge Gas Pressure Control ................................................................................................................... 196

9.2.4. Particulate Filter ...................................................................................................................................... 196

9.2.5. Pneumatic Sensors ................................................................................................................................. 196

9.3. Electronic Operation ....................................................................................................................................... 197

9.3.1. Overview ................................................................................................................................................. 197

9.3.2. CPU ........................................................................................................................................................ 199

9.3.3. Optical Bench & GFC Wheel .................................................................................................................. 200

9.3.4. Synchronous Demodulator (Sync/Demod) Assembly ............................................................................. 202

9.3.5. Relay Board ............................................................................................................................................ 205

9.3.6. Mother Board .......................................................................................................................................... 207

2

9.3.7. I

9.3.8. Power Supply/ Circuit Breaker ................................................................................................................ 211

9.4. Front Panel Touchscreen/Display Interface ................................................................................................... 212

9.4.1. LVDS Transmitter Board ......................................................................................................................... 212

9.4.2. Front Panel Touchscreen/Display Interface PCA .................................................................................... 212

9.5. Software Operation ........................................................................................................................................ 213

9.5.1. Adaptive Filter ......................................................................................................................................... 213

9.5.2. Calibration - Slope and Offset ................................................................................................................. 214

9.5.3. Measurement Algorithm .......................................................................................................................... 214

9.5.4. Temperature and Pressure Compensation ............................................................................................. 215

9.5.5. Internal Data Acquisition System (DAS) ................................................................................................. 215

10. TROUBLESHOOTING & REPAIR PROCEDURES ............................................................................................ 217

10.1. General Troubleshooting Hints ..................................................................................................................... 217

10.1.1. Interpreting WARNING Messages ........................................................................................................ 218

10.1.2. Fault Diagnosis with TEST Functions ................................................................................................... 221

10.1.3. Using the Diagnostic Signal I/O Function ............................................................................................. 223

10.1.4. Internal Electronic Status LEDs ............................................................................................................ 224

10.2. Gas Flow Problems ...................................................................................................................................... 228

10.2.1. GFC 7000TA Internal Gas Flow Diagrams ........................................................................................... 229

10.2.2. Typical Sample Gas Flow Problems ..................................................................................................... 232

10.2.3. Poor or Stopped Flow of Purge Gas ..................................................................................................... 234

10.3. Calibration Problems .................................................................................................................................... 235

10.3.1. Miscalibrated ......................................................................................................................................... 235

10.3.2. Non-Repeatable Zero and Span ........................................................................................................... 236

10.3.3. Inability to Span – Touchscreen SPAN Button Not Visible ................................................................... 236

10.3.4. Inability to Zero – Touchscreen ZERO Button Not Visible .................................................................... 237

10.4. Other Performance Problems ....................................................................................................................... 238

10.4.1. Temperature Problems ......................................................................................................................... 238

10.4.2. Excessive Noise ................................................................................................................................... 240

10.5. Subsystem Checkout ................................................................................................................................... 241

10.5.1. AC Mains Configuration ........................................................................................................................ 241

10.5.2. DC Power Supply ................................................................................................................................. 241

10.5.3. I

C Data Bus ........................................................................................................................................... 210

2

C Bus .................................................................................................................................................. 242

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Table of Contents Model GFC7000TA Carbon Dioxide Analyzer

10.5.4. Touchscreen Interface .......................................................................................................................... 242

10.5.5. LCD Display Module ............................................................................................................................. 242

10.5.6. Relay Board .......................................................................................................................................... 243

10.5.7. Sensor Assembly .................................................................................................................................. 243

10.5.8. Motherboard ......................................................................................................................................... 245

10.5.9. CPU ...................................................................................................................................................... 249

10.5.10. RS-232 Communications .................................................................................................................... 249

10.6. Repair Procedures ....................................................................................................................................... 251

10.6.1. Repairing Sample Flow Control Assembly ............................................................................................ 251

10.6.2. Removing/Replacing the GFC Wheel ................................................................................................... 252

10.6.3. Disk-On-Module Replacement Procedure ............................................................................................ 253

11. A PRIMER ON ELECTRO-STATIC DISCHARGE ............................................................................................... 255

11.1. How Static Charges are Created .................................................................................................................. 255

11.2. How Electro-Static Charges Cause Damage ............................................................................................... 256

11.3. Common Myths About ESD Damage ........................................................................................................... 257

11.4. Basic Principles of Static Control .................................................................................................................. 257

LIST OF APPENDICES

APPENDIX A - VERSION SPECIFIC SOFTWARE DOCUMENTATION, L.8

APPENDIX A-1: Models GFC 7000TA and GFC 7000E Software Menu Trees
APPENDIX A-2: GFC 7000 Series Setup Variables
APPENDIX A-3: GFC 7000 Series Warnings and Test Measurements
APPENDIX A-4: GFC 7000 Series Signal I/O Definitions
APPENDIX A-5: GFC 7000 Series DAS Triggering Events
APPENDIX A-6: GFC 7000 Series DAS Parameters
APPENDIX A-7: Terminal Command Designators
APPENDIX A-8: Terminal Key Assignments
APPENDIX A-9: GFC 7000 Series MODBUS Register

APPENDIX B - SPARE PARTS LIST and RECOMMENDED SPARES STOCKING LEVELS
APPENDIX C - REPAIR QUESTIONNAIRE
APPENDIX D - ELECTRONIC SCHEMATICS

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Table of Contents Model GFC7000TA Carbon Dioxide Analyzer

LIST OF FIGURES

Figure 3-1: Front Panel Layout ...................................................................................................................... 11

Figure 3-2: Display Screen and Touch Control ............................................................................................. 12

Figure 3-3: Display/Touch Control Screen Mapped to Menu Charts ............................................................. 14

Figure 3-4: Rear Panel Layout ....................................................................................................................... 15

Figure 3-5: Internal Chassis Layout ............................................................................................................... 17

Figure 3-6: Optical Bench Layout .................................................................................................................. 18

Figure 3-7: GFC 7000TA Internal Gas Flow .................................................................................................. 19

Figure 3-8: Analog In Connector .................................................................................................................... 20

Figure 3-9: Pneumatic Connections–Basic Configuration–Using Bottled Span Gas .................................... 27

Figure 3-10: Pneumatic Connections–Basic Configuration–Using Gas Dilution Calibrator ............................ 27

Figure 3-11: Pneumatic Connections with Ambient Zero/Ambient Span Valves (OPT 50A) .......................... 30

Figure 3-12: Pneumatic Connections with Ambient Zero/Ambient Span Valves (Opt 50A) and

External Zero Air Scrubber .......................................................................................................... 30

Figure 3-13: Pneumatic Connections with Ambient Zero/Pressurized Span Valves (OPT 50B) .................... 31

Figure 3-14: Pneumatic Connections with Ambient Zero/Pressurized Span Valves (Opt 50B) and

External Zero Air Scrubber .......................................................................................................... 31

Figure 3-15: Example of Pneumatic Set up for Multipoint Calibration ............................................................. 32

Figure 3-16: O2 Sensor Calibration Set Up ..................................................................................................... 40

Figure 5-1: Current Loop Option Installed on the Motherboard ..................................................................... 52

Figure 5-2: Internal Pneumatic Flow – Ambient Zero/Pressurized Span Valves ........................................... 55

Figure 5-3: Internal Pneumatic Flow – Ambient Zero/Ambient Span ............................................................ 56

Figure 5-4: Multi-drop/LVDS PCA Seated on CPU ....................................................................................... 58

Figure 5-5: Oxygen Sensor - Principle of Operation ...................................................................................... 59

Figure 5-6: GFC 7000TA – Internal Pneumatics with O2 Sensor Option 65 ................................................. 60

Figure 6-1: Front Panel Display ..................................................................................................................... 63

Figure 6-2: Viewing TEST Functions ............................................................................................................. 66

Figure 6-3: Viewing and Clearing GFC 7000TA WARNING Messages ........................................................ 68

Figure 6-4: Default DAS Channels Setup ...................................................................................................... 75

Figure 6-5: APICOM User Interface for DAS Configuration .......................................................................... 88

Figure 6-6: Analog Output Connector Pin Out ............................................................................................... 89

Figure 6-7: Rear Panel Connector Pin-Outs for COM1 & COM2 in RS-232 Mode ..................................... 103

Figure 6-8: CPU Connector Pin-Outs for COM1 & COM2 in RS-232 Mode ............................................... 104

Figure 6-9: Multidrop/LVDS PCA Seated on CPU ....................................................................................... 114

Figure 6-10: RS232-Multidrop PCA Host/Analyzer Interconnect Diagram .................................................... 115

Figure 6-11: Setup for Calibrating Analog Voltage Outputs .......................................................................... 130

Figure 6-12: Setup for Calibrating Current Outputs ....................................................................................... 132

Figure 6-13: Status Output Connector ........................................................................................................... 143

Figure 6-14: Control Inputs ............................................................................................................................ 145

Figure 6-15: APICOM Remote Control Program Interface ............................................................................ 152

Figure 7-1: Pneumatic Connections–Basic Configuration–Using Bottled Span Gas .................................. 162

Figure 7-2: Pneumatic Connections–Basic Configuration–Using Gas Dilution Calibrator .......................... 163

Figure 7-3: Pneumatic Connections – Ambient Zero/Pressurized Span Valves ........................................ 166

Figure 7-4: Pneumatic Connections – Ambient Zero/Pressurized Span Valves and External Zero Air

Scrubber .................................................................................................................................... 167

Figure 7-5: Pneumatic Connections – Ambient Zero/Ambient Span Valves ............................................... 167

Figure 7-6: Pneumatic Connections – Ambient Zero/Ambient Span Valves with External Zero Air

Scrubber .................................................................................................................................... 168

Figure 8-1: Sample Particulate Filter Assembly .......................................................................................... 184

Figure 9-1: Measurement Fundamentals ..................................................................................................... 188

Figure 9-2: GFC Wheel ................................................................................................................................ 188

Figure 9-3: Measurement Fundamentals with GFC Wheel ......................................................................... 189

Figure 9-4: Affect of CO2 in the Sample on CO2 MEAS & CO2 REF ......................................................... 190

Figure 9-5: Effects of Interfering Gas on CO2 MEAS & CO2 REF .............................................................. 191

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Table of Contents Model GFC7000TA Carbon Dioxide Analyzer

Figure 9-6: Chopped IR Signal .................................................................................................................... 191

Figure 9-7: Internal Pneumatic Flow – Basic Configuration ........................................................................ 194

Figure 9-8: Flow Control Assembly & Critical Flow Orifice .......................................................................... 195

Figure 9-9: GFC 7000TA Electronic Block Diagram .................................................................................... 198

Figure 9-10: CPU Board ................................................................................................................................ 199

Figure 9-11: GFC Light Mask ........................................................................................................................ 201

Figure 9-12: Segment Sensor and M/R Sensor Output ................................................................................. 202

Figure 9-13: GFC 7000TA Sync / Demod Block Diagram ............................................................................. 203

Figure 9-14: Sample & Hold Timing ............................................................................................................... 204

Figure 9-15: Location of relay board Status LED’s ........................................................................................ 207

Figure 9-16: Power Distribution Block Diagram ............................................................................................. 211

Figure 9-17: Front Panel and Display Interface Block Diagram .................................................................... 212

Figure 9-18: Basic Software Operation .......................................................................................................... 213

Figure 10-1: Viewing and Clearing Warning Messages ................................................................................ 219

Figure 10-2: Example of Signal I/O Function ................................................................................................. 224

Figure 10-3: CPU Status Indicator ................................................................................................................. 225

Figure 10-4: Sync/Demod Board Status LED Locations ............................................................................... 226

Figure 10-5: Relay Board Status LEDs .......................................................................................................... 226

Figure 10-6: GFC 7000TA – Basic Internal Gas Flow ................................................................................... 229

Figure 10-7: Internal Pneumatic Flow – Ambient Zero/Pressurized Span Valves ......................................... 230

Figure 10-8: Internal Pneumatic Flow – Ambient Zero/Ambient Span .......................................................... 231

Figure 10-9: GFC 7000TA – Internal Pneumatics with O2 Sensor Option 65A ............................................. 232

Figure 10-10: Critical Flow Restrictor Assembly Disassembly ........................................................................ 251

Figure 10-11: Opening the GFC Wheel Housing ............................................................................................. 252

Figure 10-12: Removing the GFC Wheel ........................................................................................................ 253

Figure 11-1: Triboelectric Charging ............................................................................................................... 255

Figure 11-2: Basic anti-ESD Work Station ..................................................................................................... 258

LIST OF TABLES

Table 2-1: Model GFC 7000TA Basic Unit Specifications ..................................................................................... 5

Table 3-1: Display and Touchscreen Control Description ................................................................................... 13

Table 3-2: Rear Panel Description ....................................................................................................................... 16

Table 3-3: Analog Input Pin Assignments ............................................................................................................ 21

Table 3-4: GFC 7000TA Analog Output Pin Outs ................................................................................................ 22

Table 3-5: Status Output Pin-outs ........................................................................................................................ 23

Table 3-6: Control Input Pin-outs ......................................................................................................................... 24

Table 3-7: Rear Panel Pneumatic Connections ................................................................................................... 26

Table 3-8: Front Panel Display During System Warm-Up ................................................................................... 34

Table 3-9: Possible Warning Messages at Start-Up ............................................................................................ 35

Table 5-1: Ambient Zero/Pressurized Span Valve Operating States .................................................................. 54

Table 5-2: Ambient Zero/Ambient Span Valve Operating States ........................................................................ 55

Table 6-1: Analyzer Operating modes ................................................................................................................. 64

Table 6-2: Test Functions Defined ....................................................................................................................... 65

Table 6-3: List of Warning Messages .................................................................................................................. 67

Table 6-4: Primary Setup Mode Features and Functions .................................................................................... 69

Table 6-5: Secondary Setup Mode Features and Functions ............................................................................... 69

Table 6-6: Front Panel Sample LED Status Indicators for DAS .......................................................................... 71

Table 6-7: DAS Data Channel Properties ............................................................................................................ 72

Table 6-8: DAS Data Parameter Functions ......................................................................................................... 73

Table 6-9: Password Levels ................................................................................................................................. 97

Table 6-10: Com Port Communication Modes ..................................................................................................... 106

Table 6-11: Ethernet Status Indicators ................................................................................................................ 108

Table 6-12: LAN/Internet Configuration Properties .............................................................................................. 109

Table 6-13: Internet Configuration Touchscreen Functions ................................................................................. 113

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Table of Contents Model GFC7000TA Carbon Dioxide Analyzer

Table 6-14: Variable Names (VARS) Revision B.3 .............................................................................................. 118

Table 6-15: GFC 7000TA Diagnostic (DIAG) Functions ...................................................................................... 120

Table 6-16: DIAG - Analog I/O Functions ............................................................................................................ 123

Table 6-17: Analog Output Voltage Ranges ....................................................................................................... 124

Table 6-18: Analog Output Current Loop Range ................................................................................................. 125

Table 6-19: Analog Output Pin Assignments ....................................................................................................... 125

Table 6-20: Voltage Tolerances for Analog Output Calibration ........................................................................... 129

Table 6-21: Current Loop Output Calibration with Resistor ................................................................................. 133

Table 6-22: Test Parameters Available for Analog Output A4 ............................................................................. 140

Table 6-23: CO

Table 6-24: Status Output Pin Assignments ........................................................................................................ 144

Table 6-25: Control Input Pin Assignments ......................................................................................................... 145

Table 6-26: Terminal Mode Software Commands ............................................................................................... 146

Table 6-27: Command Types .............................................................................................................................. 147

Table 6-28: Serial Interface Documents .............................................................................................................. 153

Table 6-29: RS-232 Communication Parameters for Hessen Protocol ............................................................... 154

Table 6-30: Teledyne Instruments Hessen Protocol Response Modes .............................................................. 156

Table 6-31: Default Hessen Status Bit Assignments ........................................................................................... 158

Table 7-1: AUTOCAL Modes ............................................................................................................................. 173

Table 7-2: AutoCal ATTRIBUTE Setup Parameters .......................................................................................... 173

Table 7-3: Calibration Data Quality Evaluation .................................................................................................. 176

Table 8-1: GFC 7000TA Maintenance Schedule ............................................................................................... 181

Table 8-2: GFC 7000TA Test Function Record ................................................................................................. 182

Table 8-3: Predictive uses for Test Functions.................................................................................................... 183

Table 9-1: Sync/Demod Status LED Activity ...................................................................................................... 204

Table 9-2: Relay Board Status LED’s ................................................................................................................ 206

Table 10-1: Warning Messages - Indicated Failures ........................................................................................... 220

Table 10-2: Test Functions - Indicated Failures .................................................................................................. 222

Table 10-3: Sync/Demod Board Status Failure Indications ................................................................................. 225

Table 10-4: I2C Status LED Failure Indications ................................................................................................... 226

Table 10-5: Relay Board Status LED Failure Indications .................................................................................... 227

Table 10-6: DC Power Test Point and Wiring Color Codes ................................................................................. 241

Table 10-7: DC Power Supply Acceptable Levels ............................................................................................... 242

Table 10-8: Relay Board Control Devices ............................................................................................................ 243

Table 10-9: Opto Pickup Board Nominal Output Frequencies ............................................................................. 244

Table 10-10: Analog Output Test Function - Nominal Values Voltage Outputs .................................................... 247

Table 10-11: Analog Output Test Function - Nominal Values Current Outputs ..................................................... 247

Table 10-12: Status Outputs Check ....................................................................................................................... 248

Table 11-1: Static Generation Voltages for Typical Activities .............................................................................. 255

Table 11-2: Sensitivity of Electronic Devices to Damage by ESD ....................................................................... 256

Concentration Alarm Default Settings ....................................................................................... 141

2

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Introduction Model GFC7000TA Carbon Dioxide Analyzer

1. INTRODUCTION

The Models GFC 7000TA and GFC 7000TM differ only in specifications; unless clearly differentiated,
both models in this manual are referred to as the GFC 7000TA for simplification. The GFC 7000TA
measures carbon dioxide CO
reference according to the Beer-Lambert law. This is accomplished by using a Gas Filter Wheel which
alternately allows a high energy infrared light source to pass through a CO
with no CO

The light then travels through the sample cell, which has a folded path. The energy loss through the
sample cell is compared with the zero reference signal provided by the gas filter to produce an output
proportional to concentration, with little effect from interfering gases within the sample. A nitrogen purge
system is provided for the GFC wheel assembly to eliminate the effects of ambient CO

This design produces superior zero and span stability and a high signal-to-noise ratio, allowing excellent
sensitivity. Multi-tasking software gives real time indication of numerous operating parameters and
provides automatic alarms if diagnostic limits are exceeded

present.

2

1.1. Features

by comparing infrared energy absorbed by a sample to that absorbed by a

2

filled chamber and a chamber

2

, if necessary.

2

 Ranges, GFC 7000TA: 0-2 ppm to 0-2000 ppm, GFC 7000TM: 0-4 ppm to 0-4000 ppm, user

selectable

 Gas Filter Wheel for CO

 LCD Graphical User Interface with capacitive touch screen

 Multi-tasking software allows viewing of test variables during operation

 Continuous self checking with alarms

 Bi-directional RS-232 and 10/100Base-T Ethernet (optional USB and RS-485) ports for remote

operation

 Front panel USB ports for peripheral devices

 Digital status outputs to indicate instrument operating condition

 Adaptive signal filtering to optimize response time

 Temperature & Pressure compensation

 Internal data logging with 1 min to 24 hour averages

specific measurement

2

1.2. Using This Manual

This manual has the following data structures:

1 TABLE OF CONTENTS:

Outlines the contents of the manual in the order the information is presented. This is a good overview of
the topics covered in the manual. There is also a list of tables, a list of figures and a list of appendices.

2 SPECIFICATIONS

This section contains a list of the analyzer’s performance specifications.

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Introduction Model GFC7000TA Carbon Dioxide Analyzer

3 GETTING STARTED:

Instructions for setting up, installing, and performing a functional check and initial calibration.

4 FAQ

Answers to the most frequently asked questions about operating the analyzer.

5 OPTIONAL HARDWARE & SOFTWARE

A description of optional equipment to add functionality to your analyzer.

6 OPERATION INSTRUCTIONS

This section includes step-by-step instructions for operating the analyzer and using its various features
and functions.

7 CALIBRATION PROCEDURES

General information and step by step instructions for calibrating your analyzer.

8 EPA PROTOCOL CALIBRATION

Because CO
this type of analyzer. Therefore no special calibration methods are needed to satisfy EPA requirements.

9 INSTRUMENT MAINTENANCE

Description of certain preventative maintenance procedures that should be regularly performed on you
instrument to keep it in good operating condition. This section also includes information on using the
DAS to record diagnostic functions useful in predicting possible component failures before they happen.

is not declared a criteria air pollutant by the US EPA, EPA equivalency is not required for

2

10 THEORY OF OPERATION

An in-depth look at the various principals by which your analyzer operates as well as a description of how
the various electronic, mechanical and pneumatic components of the instrument work and interact with
each other. A close reading of this section is invaluable for understanding the instrument’s operation.

11 TROUBLESHOOTING

This section includes pointers and instructions for diagnosing problems with the instrument, such as
excessive noise or drift, as well as instructions on performing repairs of the instrument’s major
subsystems.

12. A PRIMER ON ELECTRO-STATIC DISCHARGE

Very important information on how static electricity occurs, why it is so dangerous to electronic
components and assemblies as well as how to prevent that damage from occurring.

APPENDICES:

These include: software menu trees, warning messages, definitions of DAS & serial I/O variables, spare
parts list, repair questionnaire, interconnect listing and drawings, and electronic schematics.

NOTE

Throughout this manual, words printed in capital, bold letters, such as SETUP
or ENTR represent messages as they appear on the analyzer’s front panel
display. Also, flowcharts in this manual contain typical representations of the
analyzer’s display during the various operations being described. These
representations are not intended to be exact and may differ slightly from the
actual display of your instrument.

Teledyne Analytical Instruments 2

Introduction Model GFC7000TA Carbon Dioxide Analyzer

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Specifications Model GFC7000TA Carbon Dioxide Analyzer

2. SPECIFICATIONS AND APPROVALS

2.1. Specifications

Table 2-1: Model GFC 7000TA Basic Unit Specifications

GFC 7000TA Parameter GFC 7000TA Specification

Ranges
(Physical Analog Output)

Measurement Units ppb, ppm, µg/m3, mg/m3, % (user selectable)
Zero Noise < 0.1 ppm (RMS)
Span Noise < 1% of reading (RMS)
Lower Detectable Limit < 0.2 ppm1
Zero Drift (24 hours) <0.25 ppm1
Span Drift (24 hours) <0.5% of reading 1
Lag Time 10 seconds
Rise/Fall Time <60 seconds to 95%
Linearity 1% of full scale
Precision 0.5% of reading
Sample Flow Rate 800cm3/min. ±10%

Temperature Coefficient < 0.1% of Full Scale per oC
Voltage Coefficient < 0.05% of Full Scale per V
AC Power Rating 100V-120V, 220V – 240 V, 50/60 Hz
Analog Output Ranges 10V, 5V, 1V, 0.1V (selectable)
Analog Output Resolution 1 part in 4096 of selected full-scale voltage
Recorder Offset

Standard I/O

Optional I/O

Environmental Installation category (over-voltage category) II; Pollution degree 2
Temperature Range 5-40oC
Humidity Range 0 - 95% RH, non-condensing
Dimensions H x W x D 7" x 17" x 23.5" (178 mm x 432 mm x 597 mm)

Min: 0-2 ppm Full scale
Max: 0-2,000 ppm Full scale
Selectable, dual ranges and auto ranging supported

O

Sensor option adds 110 cm³/min, ±20%, to total flow through when installed.

2

±10%
1 Ethernet: 10/100Base-T

2 RS-232 (300 – 115,200 baud)
2 USB device ports
8 opto-isolated digital status outputs
6 opto-isolated digital control inputs (3 defined, 3 spare)

4 analog outputs
1 USB com port

1 RS485
8 analog inputs (0-10V, 12-bit)
4 digital alarm outputs
Multidrop RS232
3 4-20mA current outputs

Teledyne Analytical Instruments 5

Specifications Model GFC7000TA Carbon Dioxide Analyzer

GFC 7000TA Parameter GFC 7000TA Specification

Weight 40 lbs. (18.1 kg)
Certifications CE: EN61010-1:90 + A1:92 + A2:95, EN61326 - Class A

1

At constant temperature and voltage.

Table 2-2: Model GFC 7000TM Basic Unit Specifications

GFC 7000TM Parameter GFC 7000TM Specification

Ranges
(Physical Analog Output)

Measurement Units ppb, ppm, µg/m3, mg/m3, (selectable)
Zero Noise < 0.2 ppm (RMS)
Span Noise < 1% of reading (RMS)
Lower Detectable Limit < 0.4 ppm1
Zero Drift (24 hours) <0.5 ppm1
Span Drift (24 hours) <0.5% of reading1
Lag Time 10 seconds
Rise/Fall Time <60 seconds to 95%
Linearity 1% of full scale
Precision 0.5% of reading
Sample Flow Rate

Temperature Coefficient < 0.1% of Full Scale per oC or 0.1 ppm per oC, whichever is greater
Voltage Coefficient < 0.05% of Full Scale per V
AC Power Requirements 100V – 120V, 220V – 240V, 50/60 Hz
Analog Output Ranges 10V, 5V, 1V, 0.1V
Recorder Offset

Analog Output Resolution 1 part in 4096 of selected full-scale voltage
Standard I/O

Optional I/O

Operating Temperature Range 5-40oC
Humidity Range 0 - 95% RH, non-condensing
Dimensions H x W x D 7" x 17" x 23.5" (178 mm x 432 mm x 597 mm)
Weight 40 lbs. (18.1 kg)
Environmental Installation category (over-voltage category) II; Pollution degree 2

Min: 0-4 ppm Full scale
Max: 0-4000 ppm Full scale
Selectable, dual ranges and auto ranging supported

3

800cm

/min. ±10%

O2 Sensor option adds 110 cm³/min, ±20%, to total flow though when installed

±10%

1 Ethernet: 10/100Base-T
2 RS232 (300-115,200 baud)
2 USB device ports
8 Status opto-isolated digital status outputs
6 Opto-isolated digital control inputs (3 defined, 3 spare)
4 Analog outputs

1 USB com port
1 RS485
8 Analog inputs (0-10V, 12-bit)
4 Digital alarm outputs
Multidrop RS232
3 4-20mA current outputs

Teledyne Analytical Instruments 6

Specifications Model GFC7000TA Carbon Dioxide Analyzer

GFC 7000TM Parameter GFC 7000TM Specification

Certifications CE: EN61010-1:90 + A1:92 + A2:95, EN61326 - Class A

1

At constant temperature and voltage.

2.2. CE Mark Compliance

Emissions Compliance

The Teledyne Instruments Model GFC 7000TA Gas Filter Correlation CO

Analyzer was tested and found

2

to be fully compliant with:

EN61326 (1997 w/A1: 98) Class A, FCC Part 15 Subpart B section 15.107 Class A, ICES-003 Class A
(ANSI C63.4 1992) & AS/NZS 3548 (w/A1 & A2; 97) Class A.

Safety Compliance

The Teledyne Instruments Model GFC 7000TA Gas Filter Correlation CO

Analyzer was tested and found

2

to be fully compliant with:

IEC 61010-1:90 + A1:92 + A2:95

Teledyne Analytical Instruments 7

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3. GETTING STARTED

3.1. Unpacking and Initial Set Up

CAUTION

To avoid personal injury, always use two persons to lift and carry the Model GFC

Never disconnect PCAs, wiring harnesses or electronic subassemblies while the

CAUTION – Avoid Warranty Invalidation

Printed circuit assemblies (PCAs) are sensitive to electro-static discharges too
small to be felt by the human nervous system. Damage resulting from failure to
use ESD protection when working with electronic assemblies will void the
instrument warranty.

See A Primer on Electro-Static Discharge in this manual for more information on
preventing ESD damage.

instrument is under power.

7000TA.

WARNING

NOTE

It is recommended that you store shipping containers/materials for future use if/when the instrument should
be returned to the factory for repair and/or calibration service. See Warranty section in this manual and
shipping procedures on our Website at:

http://www.teledyne-api.com under Customer Support > Return Authorization.

1. Verify that there is no apparent external shipping damage. If damage has occurred, please
advise the shipper first, then Teledyne Instruments.

2. Included with your analyzer is a printed record of the final performance characterization
performed on your instrument at the factory. This record, titled Final Test and Validation Data
Sheet (P/N 04596) is an important quality assurance and calibration record for this instrument. It
should be placed in the quality records file for this instrument.

3. Carefully remove the top cover of the analyzer and check for internal shipping damage.

 Remove the set-screw located in the top, center of the Front panel.
 Remove the 2 screws fastening the top cover to the unit (one per side towards the rear).
 Slide the cover backwards until it clears the analyzer’s front bezel.

Lift the cover straight up.

Teledyne Analytical Instruments 9

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

4. Inspect the interior of the instrument to make sure all circuit boards and other components are in
good shape and properly seated.

5. Check the connectors of the various internal wiring harnesses and pneumatic hoses to make sure
they are firmly and properly seated.

6. Verify that all of the optional hardware ordered with the unit has been installed. These are listed
on the paperwork accompanying the analyzer.

VENTILATION CLEARANCE: Whether the analyzer is set up on a bench or installed into an instrument
rack, be sure to leave sufficient ventilation clearance.

AREA MINIMUM REQUIRED CLEARANCE

Back of the instrument

4 in.

Sides of the instrument

Above and below the instrument

Various rack mount kits are available for this analyzer. See Section 5.1 of this manual for more
information.

1 in.
1 in.

Teledyne Analytical Instruments 10

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.2. Front Panel

Figure 3-1 shows the analyzer’s front panel layout, followed by a close-up of the display screen in Figure
3-2, which is described in Table 3-1. The two USB ports on the front panel are provided for the
connection of peripheral devices:

 plug-in mouse (not included) to be used as an alternative to the touchscreen interface

 thumb drive (not included) to download updates to instruction software (contact TAI Customer

Service for information).

Figure 3-1: Front Panel Layout

Teledyne Analytical Instruments 11

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

Figure 3-2: Display Screen and Touch Control

CAUTION – Avoid Damaging Touchscreen

Do not use hard-surfaced instruments such as pens to operate the touchscr een.

The front panel liquid crystal display includes touch control. Upon analyzer start-up, the display shows a
splash screen and other initialization indicators before the main display appears, similar to Figure 3-2
above (may or may not display a Fault alarm). The LEDs on the display screen indicate the Sample,
Calibration and Fault states; also on the screen is the gas concentration field (Conc), which displays real­time readouts for the primary gas and for the secondary gas if installed. The display screen also shows
which mode the analyzer is currently in (Mode field), as well as messages and data (Param field). Along
the bottom of the screen is a row of touch control buttons; only those that are currently applicable will
have a label. Table 3-1 provides detailed information for each component of the screen.

Teledyne Analytical Instruments 12

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

Table 3-1: Display and Touchscreen Control Description

Field Description/Function

Status LEDs indicating the states of Sample, Calibration and Fault, as follows:

Name Color State Definition

Off
On

SAMPLE Green

CAL Yellow

FAULT Red

Conc

Mode Displays the name of the analyzer’s current operating mode

Param

Control Buttons Displays dynamic, context sensitive labels on each button, which is blank when inactive until applicable.

Displays the actual concentration of the sample gas currently being measured by the analyzer in the
currently selected units of measure

Displays a variety of informational messages such as warning messages, operational data, test function
values and response messages during interactive tasks.

Blinking

Off
On
Blinking
Off
Blinking

Unit is not operating in sample mode, DAS is disabled.
Sample Mode active; Front Panel Display being updated; DAS data

being stored.
Unit is operating in sample mode, front panel display being updated,

DAS hold-off mode is ON, DAS disabled
Auto Cal disabled
Auto Cal enabled
Unit is in calibration mode
No warnings exist
Warnings exist

Figure 3-3 shows how the front panel display is mapped to the menu charts illustrated in this manual. The
Mode, Param (parameters), and Conc (gas concentration) fields in the display screen are represented
across the top row of each menu chart. The eight touchscreen control buttons along the bottom of the
display screen are represented in the bottom row of each menu chart.

Teledyne Analytical Instruments 13

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

Figure 3-3: Display/Touch Control Screen Mapped to Menu Charts

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Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.3. Rear Panel

Figure 3-4: Rear Panel Layout

Table 3-2 provides a description of each component on the rear panel

Teledyne Analytical Instruments 15

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

Table 3-2: Rear Panel Description

Component Function

cooling fan

AC power

connector

Model/specs label

PURGE IN

SAMPLE

EXHAUST

VENT SPAN

PRESSURE SPAN

RX TX

COM 2

RS-232

DCE DTE

STATUS

ANALOG OUT

CONTROL IN

ALARM

ETHERNET

ANALOG IN

USB

Information Label

Pulls ambient air into chassis through side vents and exhausts through rear
Connector for three-prong cord to apply AC power to the analyzer

CAUTION! The cord’s power specifications (specs) MUST comply with the power
specs on the analyzer’s rear panel Model number label

Identifies the analyzer model number and provides power specs

Connect a gas line from the source of sample gas here
Calibration gases are also inlet here on units without zero/span valve options installed
Connect an exhaust gas line of not more than 10 meters long here that leads outside

the shelter or immediate area surrounding the instrument
Span gas vent outlet for units with zero/span valve options installed
Connect an exhaust gas line of not more than 10 meters long here
On units with zero/span valve options installed, connect a gas line to the source of

calibrated span gas here
Internal Zero Air: On units with zero/span valve options installed but no internal zero

IZS

air scrubber attach a gas line to the source of zero air here
LEDs indicate receive (RX) and transmit (TX) activity on the when blinking

Serial communications port for RS-232 or RS-485
Serial communications port for RS-232 only
Switch to select either data terminal equipment or data communication equipment

during RS-232 communication
For outputs to devices such as Programmable Logic Controllers (PLCs)

For voltage or current loop outputs to a strip chart recorder and/or a data logger
For remotely activating the zero and span calibration modes
Option for concentration alarms and system warnings
Connector for network or Internet remote communication, using Ethernet cable
Option for external voltage signals from other instrumentation and for logging these

signals
Com port optional connector for direct connection to laptop computer, using USB cable

Includes voltage and frequency specifications

Teledyne Analytical Instruments 16

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.4. Internal Layout

Figure 3-3 shows a top-down view of the analyzer. The shown configuration includes the Ethernet board,
IZS option, zero-air scrubber and an additional sample dryer. See Section 5 for optional equipment.

Figure 3-5: Internal Chassis Layout

Teledyne Analytical Instruments 17

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

Opto-Pickup

PCA

GFC Temperature

Sensor

Sync/Demod PCA

Housing

GFC Heater

Sample Gas Flow

Sensor

Purge Gas

Inlet

GFC Wheel

Heat Sync

GFC Wheel Motor

IR Source

Sample Gas Outlet

fitting

Sample Chamber

Pressure Sensor(s)

Shock Absorbing
Mounting Bracket

Purge Gas

Pressure Regulator

Bench

Temperature

Thermistor

Figure 3-6: Optical Bench Layout

Teledyne Analytical Instruments 18

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

Purge Gas

Flow Control

Figure 3-7: GFC 7000TA Internal Gas Flow

3.5. Electrical Connections

WARNING

Never disconnect PCAs, wiring harnesses or electronic subassemblies while the

To maintain compliance with EMC standards, it is required that the cable length be no greater than 3
meters for all I/O connections, which include Analog In, Analog Out, Status Out, Control In, Ethernet/LAN,
USB, RS-232, and RS-485.

Refer to Figure 3-4 for the locations of the rear panel connections.

instrument is under power.

NOTE

Teledyne Analytical Instruments 19

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.5.1. Power Connection

WARNING

Power connection must have functioning ground connection.

Do not defeat the ground wire on power plug.

Check the voltage and frequency specifications on the rear panel Model Label for

compatibility with the local power before plugging the analyzer into line power.

Do not plug in the power cord if the voltage or frequency is incorrect.

The GFC 7000TA analyzer can be configured for both 100-130 V and 210-240 V at either 50 or 60 Hz.
To avoid damage to your analyzer, make sure that the AC power voltage matches the voltage indicated
on the rear panel serial number label and that the frequency is between 47 and 63 Hz.

Turn off analyzer power before disconnecting or

connecting electrical subassemblies.

Do not operate with cover off.

CAUTION

Attach the power cord to the analyzer and plug it into a power outlet capable of carrying at least 10 A
current at your AC voltage and that it is equipped with a functioning earth ground.

3.5.2. Connecting Analog Inputs (Option 64)

The Analog In connector is used for connecting external voltage signals from other instrumentation (such
as meteorological instruments) and for logging these signals in the analyzer’s internal DAS. The input
voltage range for each analog input is 0-10 VDC.

Figure 3-8: Analog In Connector

Teledyne Analytical Instruments 20

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

A

Pin assignments for the Analog In connector are presented in Table 3-3.

Table 3-3: Analog Input Pin Assignments

PIN DESCRIPTION

1 Analog input # 1 AIN 1
2 Analog input # 2 AIN 2
3 Analog input # 3 AIN 3
4 Analog input # 4 AIN 4
5 Analog input # 5 AIN 5
6 Analog input # 6 AIN 6
7 Analog input # 7 AIN 7
8 Analog input # 8 AIN 8
GND Analog input Ground N/A

1

See Section 6.7 for details on setting up the DAS.

DAS

PARAMETER

1

3.5.3. Connecting Analog Outputs

The GFC 7000TA is equipped with several analog output channels accessible through a connector on the
back panel of the instrument. The standard configuration for these outputs is mVDC. An optional current
loop output is available for each.

When the instrument is in its default configuration, channels A1 and A2 output a signal that is proportional
to the CO
to a chart recorder or for interfacing with a data logger.

Output A3 is only used if the optional O

Channel A4 is special. It can be set by the user (see Section 6.13.9) to output any one of the parameters
accessible through the <TST TST> keys of the units sample display.

To access these signals attach a strip chart recorder and/or data-logger to the appropriate analog output
connections on the rear panel of the analyzer.

concentration of the sample gas. Either can be used for connecting the analog output signal

2

sensor is installed.

2

A1 A2 A3

ANALOG

4

1 2 3 4 5 6 7 8

Pin-outs for the analog output connector at the rear panel of the instrument are:

Teledyne Analytical Instruments 21

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

Table 3-4: GFC 7000TA Analog Output Pin Outs

PIN ANALOG OUTPUT VDC SIGNAL MADC SIGNAL

1
2 Ground I Out ­3
4 Ground I Out ­5

6 Ground I Out -

7
8 Ground Not used

(Only used if O2 sensor

A1

A2
A3

is installed)

A4

 The default analog output voltage setting of the GFC 7000TA CO2 Analyzer is 0 – 5 VDC with

a range of 0 – 500 ppm.

 TO change these settings, see Sections 6.13.4 and 6.8 respectively.

V Out I Out +

V Out I Out +

V Out I Out +

V Out Not used

Teledyne Analytical Instruments 22

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.5.4. Connecting the Status Outputs

If you wish utilize the analyzer’s status outputs to interface with a device that accepts logic-level digital
inputs, such as programmable logic controllers (PLC’s) they are accessed via a 12-pin connector on the
analyzer’s rear panel labeled STATUS.

1 2 3 4 5 6 7 8 D

STATUS

+

NOTE

Most PLC’s have internal provisions for limiting the current the input will draw.

When connecting to a unit that does not have this feature, external resistors must

be used to limit the current through the individual transistor outputs to ≤50mA

(120 Ω for 5V supply).

The pin assignments for the status outputs can be found in the table below:

Table 3-5: Status Output Pin-outs

OUTPUT #

1
2

3
4
5
6

7

8

D EMITTER BUS The emitters of the transistors on pins 1-8 are bused together.
+ DC POWER + 5 VDC

STATUS

DEFINITION
SYSTEM OK

CONC VALID

HIGH RANGE

ZERO CAL
SPAN CAL

DIAG MODE

ALARM1

ALARM2

CONDITION

On if no faults are present.
On if CO2 concentration measurement is valid.
If the CO
On if unit is in high range of DUAL or AUTO range modes.
On whenever the instruments ZERO point is being calibrated.
On whenever the instruments SPAN point is being calibrated.
On whenever the instrument is in DIAGNOSTIC mode.
On whenever the measured CO

ALM1
On whenever the measured CO2 concentration is above the set point for

ALM2

concentration measurement is invalid, this bit is OFF.

2

concentration is above the set point for

2

Digital Ground The ground level from the analyzer’s internal DC power supplies.

Teledyne Analytical Instruments 23

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.5.5. Connecting the Control Inputs

If you wish to use the analyzer to remotely activate the zero and span calibration modes, several digital
control inputs are provided through a 10-pin connector labeled CONTROL IN on the analyzer’s rear
panel.

There are two methods for energizing the control inputs. The internal +5V available from the pin labeled
“+” is the most convenient method. However, if full isolation is required, an external 5 VDC power supply
should be used.

CONTROL IN

A B C D E F U +

S

Z

P

E

A

R

N

O

Local Power Connections

A B C D E F U +

S

Z

P

E

A

R

N

O

-

External Power Connections

CONTROL IN

5 VDC Power

Supply

+

The pin assignments for the digital control inputs can be found in the table below:

Table 3-6: Control Input Pin-outs

INPUT #

A

B
C

D
E

F

U

+

STATUS

DEFINITION

REMOTE ZERO

CAL

REMOTE

SPAN CAL

The Analyzer is placed in Zero Calibration mode. The mode field of
the display will read ZERO CAL R.

The Analyzer is placed in Span Calibration mode. The mode field of

the display will read SPAN CAL R.
SPARE

SPARE

SPARE

SPARE

Digital Ground May be connected to the ground of the data logger/recorder.

Pull-up supply for

inputs

Internal +5V

Supply

Input pin for +5 VDC required to activate pins A – F. This can be from

an external source or from the “+” pin of the instruments STATUS

connector.

Internal source of +5V which can be used to actuate control inputs

when connected to the U pin.

ON CONDITION

Teledyne Analytical Instruments 24

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.5.6. Connecting the Communications Interfaces

For RS-232 or RS-485 communications through the analyzer’s serial interface com ports, refer to Section

6.11 of this manual for instructions on their configuration and usage.

3.5.6.1. Connecting to a LAN or the Internet

For network or Internet communication with the analyzer, connect an Ethernet cable from the analyzer’s
rear panel Ethernet interface connector to an Ethernet access port.

NOTE:

The GFC 7000TA firmware supports dynamic IP addressing or DHCP.

If your network also supports DHCP, the analyzer will automatically configure its

LAN connection appropriately,

If your network does not support DHCP, see Section 6.11.6.3 for instructions on

manually configuring the LAN connection.

3.5.6.2. Connecting to a Personal Computer (PC)

If the analyzer is configured with the USB com option, connect a USB cable between the USB ports of the
analyzer’s rear panel and a desktop or laptop PC for direct communication between the two. Their baud
rates must match (see Section 6.11.8).

3.5.6.3. Connecting to a Multidrop Network

If your unit has a Teledyne Instruments RS-232 multidrop card (Option 62), see Section 6.11.7 for
instructions on setting it up.

3.6. Pneumatic Connections

CAUTION!

Do not operate this instrument until you’ve removed dust plugs from SAMPLE and EXHAUST
ports on the rear panel!

Teledyne Analytical Instruments 25

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.6.1. Basic Pneumatic Connections

NOTE

In order to prevent dust from getting into the gas flow channels of your analyzer,

it was shipped with small plugs inserted into each of the pneumatic fittings on the

back panel. Remove these plugs before operating the analyzer. It is recommended

that they be stored for future use (moving, storing or shipping the analyzer).

Figure 3-4 illustrates the basic configuration for gas supply and exhaust lines to the Model GFC 7000TA
Analyzer. Figure 3-5 illustrates the internal gas flow of the instrument in its basic configuration.

Please refer to Figure 3-2 for pneumatic connections at the rear panel and Table 3-2 for description.

NOTE

Sample and calibration gases should only come into contact with PTFE (Teflon),

FEP, glass, stainless steel or brass.

Table 3-7: Rear Panel Pneumatic Connections

REAR PANEL LABEL FUNCTION

Connect a gas line from the source of sample gas here.

SAMPLE

EXHAUST

PRESSURE SPAN

VENT SPAN

IZS

PURGE IN

Calibration gasses are also inlet here on units without zero/span valve or IZS

options installed.
Connect an exhaust gas line of not more than 10 meters long here.
On units with zero/span valve options installed, connect a gas line to the source

of calibrated span gas here.
Span gas vent outlet for units with zero/span valve options installed.
Connect an exhaust gas line of not more than 10 meters long here.
Internal zero air scrubber.

On units with zero/span valve options installed but no internal zero air

scrubber, attach a gas line to the source of zero air here.
This inlet supplies purge air to the GFC wheel housing (see Section 10.2.3)
Connect a source of dried air that has been scrubbed of CO

.

2

Teledyne Analytical Instruments 26

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

Figure 3-9: Pneumatic Connections–Basic Configuration–Using Bottled Span Gas

Figure 3-10: Pneumatic Connections–Basic Configuration–Using Gas Dilution Calibrator

Teledyne Analytical Instruments 27

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

7. Attach a sample inlet line to the sample inlet port. The SAMPLE input line should not be more
than 2 meters long.

NOTE

Ideally, the pressure of the sample gas should be at ambient pressure (0 psig).

Maximum pressure of sample gas should not exceed 1.5 in-Hg over ambient.

In applications where the sample gas is received from a pressurized manifold, a vent

must be placed as shown to equalize the sample gas with ambient atmospheric

pressure before it enters the analyzer.

This vent line must be:

 At least 0.2m long
 No more than 2m long and vented outside the shelter or immediate area

surrounding the instrument.

8. Attach sources of zero air and span gas (see Figures 3-3 through 3-8 inclusive).

 Span Gas is a gas specifically mixed to match the chemical composition of the type of gas

being measured at near full scale of the desired measurement range.

In the case of CO
Analyzer it is recommended that you use a gas calibrated to have a CO

measurements made with the Teledyne Instruments Model GFC 7000TA

2

content equaling

2

80% of the range of compositions being measured.

EXAMPLE: If the application is to measure between 0 ppm and 500 ppm, an appropriate Span
Gas would be 400 ppm. If the application is to measure between 0 ppm and 100 ppm, an
appropriate Span Gas would be 80 ppm.

 Span Gas can be purchased in pressurized canisters or created using Dynamic Dilution

Calibrator such as the Teledyne Instruments Model T700 and a source of dried air scrubbed
of CO

such as a bottle of N2.

2

 Zero Air is similar in chemical composition to the Earth’s atmosphere but scrubbed of all

components that might affect the analyzer’s readings.

In the case of CO

measurements this means less than 0.1 ppm of CO2 and Water Vapor

2

(when dew point <-15˚C). Zero Air can be purchased in pressurized canisters.

9. Attach an exhaust line to the exhaust outlet port.

 The exhaust from the pump and vent lines should be vented to atmospheric pressure using

maximum of 10 meters of ¼” PTEF tubing.

CAUTION

Venting should be outside the shelter or immediate area surrounding the instrument.

Teledyne Analytical Instruments 28

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

10. Attach a source of dried air scrubbed of CO2 to the purge inlet port.

NOTE

The minimum gas pressure of the source of purge air should be 7.5 psig.

If the source of the purge air is shared by a Teledyne Instruments T700 (as shown

in figure 3-7) the minimum gas pressure should be 25 psig and should not exceed

35 psig.

11. Once the appropriate pneumatic connections have been made, check all pneumatic fittings for
leaks using a procedure similar to that defined in Section 9.3.3.

Teledyne Analytical Instruments 29

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.6.2. Connections with Internal Valve Options Installed

Figure 3-11 and Figure 3-12 show the pneumatic connections for the ambient zero and ambient span
valve option (Option 50A).

Figure 3-11: Pneumatic Connections with Ambient Zero/Ambient Span Valves (OPT 50A)

Figure 3-12: Pneumatic Connections with Ambient Zero/Ambient Span Valves (Opt 50A) and

External Zero Air Scrubber

Teledyne Analytical Instruments 30

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

Figure 3-13 and Figure 3-14 show the pneumatic connections for the ambient zero and ambient span
valve option (Option 50B).

VENT

Figure 3-13: Pneumatic Connections with Ambient Zero/Pressurized Span Valves (OPT 50B)

Figure 3-14: Pneumatic Connections with Ambient Zero/Pressurized Span Valves (Opt 50B) and

External Zero Air Scrubber

Teledyne Analytical Instruments 31

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.6.3. Pneumatic Connections in Multipoint Calibration Applications

Some applications may require multipoint calibration checks where span gas of several different
concentrations is needed. We recommend using high-concentration, certified, calibration gas supplied to
the analyzer through a Gas Dilution Calibrator such as a Teledyne Instruments Model T700. This type of
calibrator precisely mixes Span Gas and Zero Air to produce any concentration level between 0 ppm and
the concentration of the calibrated gas.

Figure 3-12 depicts the pneumatic set up in this sort of application of a Model GFC 7000TA CO
with ambient zero/ambient span valve option 50A installed (a common configuration for this type of
application).

Analyzer

2

Figure 3-15: Example of Pneumatic Set up for Multipoint Calibration

3.6.4. Setting the Internal Purge Air Pressure

In order to maintain proper purge air flow though the GFC wheel housing, a manually adjustable pressure
regulator is provided (see Figure 3-5). This regulator includes two output ports. One is used to supply
purge air to the GFC wheel. The other may be used to attach a pressure gauge.

To adjust the internal purge air pressure of the GFC 7000TA:

1. Turn off the instrument.

2. Remove the source of zero air attached to the purge line inlet port at the back of the analyzer.

3. Remove the analyzer’s top cover.

4. Remove the cap from the second, unused, output port on the pressure regulator.

5. Attach a pressure gauge capable of measuring in the 5-10 psig range with 0.5 psig resolution to
the port.

Teledyne Analytical Instruments 32

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

6. Turn the instrument on.

7. Make sure the zero air supply to the analyzer’s purge line inlet is supplying gas at a stable
pressure above 7.5 psig.

8. Adjust the GFC 7000TA’s pressure regulator until the attached gauge reads 7.5 psig.

9. Turn off the instrument.

10. Remove the source of zero air attached to the purge line inlet port at the back of the analyzer.

11. Remove the pressure gauge and reattach the end cap removed in step 4 above.

12. Replace the analyzer’s top cover.

3.7. Initial Operation

If you are unfamiliar with the GFC 7000TA theory of operation, we recommend that you read
Section 10. For information on navigating the analyzer’s software menus, see the menu trees described
in Appendix A.

NOTE

The analyzer’s cover must be installed to ensure that the temperatures of the GFC

wheel and absorption cell assemblies are properly controlled.

3.7.1. Startup

After electrical and pneumatic connections are made, and initial functional check is required. Turn on the
instrument. The pump, exhaust fan and PMT cooler fan should start immediately. The display will briefly
show a logo splash screen at the start of initialization.

The analyzer should automatically switch to Sample Mode after completing the boot-up sequence and
start monitoring CO
gas measurements can be taken. During the warm-up period, the front panel display may show
messages in the Parameters field.

gas. However, there is an approximately one hour warm-up period before reliable

2

Teledyne Analytical Instruments 33

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.7.2. Warm Up

During the warm-up period various portions of the instrument’s front panel may behave as indicated in
Table 3-8.

Table 3-8: Front Panel Display During System Warm-Up

NAME COLOR BEHAVIOR SIGNIFICANCE

Displays current,

Conc field N/A

compensated CO
Concentration

Displays current

Mode field N/A

mode, e.g.,
SAMPLE”

Param field N/A

Displays menu items
and messages.

STATUS LEDs

Sample Green On

Cal Yellow Off The instrument’s calibration is not enabled.

Fault Red Blinking

This is normal operation, but deemed inaccurate during the

2

warm-up period.

Instrument is in Sample mode but is still in the process of
warming up. (DAS holdoff period is active)

Refer to Table 3-9 for a list and descriptions of warning
messages.

Unit is operating in sample mode; front panel display is
being updated.

Flashes On/Off when adaptive filter is active

The analyzer is warming up and hence out of specification
for a fault-free reading. Various warning messages appear
in the Param field.

3.7.3. Warning Messages

Because internal temperatures and other conditions may be outside be specified limits during the
analyzer’s warm-up period, the software will suppress most warning conditions for 30 minutes after power
up. If warning messages persist after the 30 minutes warm up period is over, investigate their cause
using the troubleshooting guidelines in Section 11 of this manual.

To view and clear warning messages, press:

TEST

deactivates warning

messages

If the warning message persists
after several attempts to clear it,

the message may indicate a

real problem and not an artifact

NOTE:

of the warm-up period

SAMPLE HVPS WARNING CO2 = 0.00

TEST CAL MSG CLR SETUP

SAMPLE

< TST TST > CAL

SAMPLE

TEST CAL MSG

Make sure warning messages are

not due to real problems.

RANGE=500.000 PPM

HVPS WARNING

CO2 = 0.00

CLR SETUP

MSG

CO2 = 0.00

CLR

SETUP

MSG

activates warning

messages.

<TST TST

Press

If more than one warning is active, the

next message will take its place
Once the last warning has been

cleared, the analyzer returns to

> keys replaced with

TEST

key

CLR

to clear the current

message.

SAMPLE

mode

Table 3-6 lists brief descriptions of the warning messages that may occur during start up.

Teledyne Analytical Instruments 34

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

Table 3-9: Possible Warning Messages at Start-Up

MESSAGE MEANING

ANALOG CAL WARNING

BENCH TEMP WARNING

BOX TEMP WARNING

CANNOT DYN SPAN

CANNOT DYN ZERO

CONC ALRM1 WARNING

CONC ALRM2 WARNING

CONFIG INITIALIZED

DATA INITIALIZED

O2 CELL TEMP WARN

PHOTO TEMP WARNING

The instrument’s A/D circuitry or one of its analog outputs is not calibrated.

The optical bench Temperature is outside the specified limits.

Remote span calibration failed while the dynamic span feature was set to turned on.

Remote zero calibration failed while the dynamic zero feature was set to turned on.

Configuration was reset to factory defaults or was erased.

Concentration alarm 1 is enabled and the measured CO2 level is ≥ the set point.

Concentration alarm 2 is enabled and the measured CO2 level is ≥ the set point.

Configuration storage was reset to factory configuration or erased.

DAS data storage was erased.

O2 sensor cell temperature outside of warning limits.

The temperature of the IR photometer is outside the specified limits.

REAR BOARD NOT DET

RELAY BOARD WARN

SAMPLE FLOW WARN

SAMPLE PRESS WARN

SAMPLE TEMP WARN

SOURCE WARNING

SYSTEM RESET

WHEEL TEMP WARNING

The CPU is unable to communicate with the motherboard.

The firmware is unable to communicate with the relay board.

The flow rate of the sample gas is outside the specified limits.

Sample gas pressure outside of operational parameters.

The temperature of the sample gas is outside the specified limits.

The IR source may be faulty.

The computer was rebooted.

The Gas Filter Correlation wheel temperature is outside the specified limits.

Teledyne Analytical Instruments 35

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

1

g

3.7.4. Functional Check

1. After the analyzer’s components has warmed up for at least 30 minutes, verify that the software
properly supports any hardware options that were installed.

2. Check to make sure that the analyzer is functioning within allowable operating parameters.
Appendix C includes a list of test functions viewable from the analyzer’s front panel as well as
their expected values. These functions are also useful tools for diagnosing performance
problems with your analyzer (Section11.1.2). The enclosed Final Test and Validation Data sheet
(part number 04307) lists these values before the instrument left the factory.

To view the current values of these parameters press the following button sequence on the analyzer’s
front panel. Remember until the unit has completed its warm up these parameters may not have
stabilized.

SAMPLE RANGE = 500.000 PPM CO2 = XXX.X
< TST TST > CAL SETUP

Toggle <TST TST> buttons

to scroll throu

Only appears instrument is set

for DU AL or AUTO reporting
range modes.

2

Only appears if O2 Sensor

Option is installed.

h list of

RANGE
RANGE1
RANGE2

O2 RANGE

STABIL

MR RATIO

SAMP FL

SAMP TEMP
BENCH TEMP
WHEEL TEMP

BOX TEM P
PHT DRIVE

SLOPE

OFFSET

MEAS

REF

PRES

TEST

TIME

1
1

2

Refer to
Table 6-2 for
definitions of

these test
functions.

If your network is running a dynamic host configuration protocol (DHCP) software package, the

Ethernet feature will automatically configure its interface with your LAN. (See Section 6.11.6.2).
This configuration is useful for quickly getting an instrument up and running on a network.
However, for permanent Ethernet connections, a static IP address should be used. (See Section

6.11.6.3).

Teledyne Analytical Instruments 36

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.8. Initial Calibration Procedure

The next task is to calibrate the analyzer.

To perform the following calibration you must have sources for zero air and span gas available for input
into the sample port on the back of the analyzer. See Section 3.1.3 for instructions for connecting these
gas sources.

While it is possible to perform this procedure with any range setting we recommend that you perform this
initial checkout using the 500 ppm range.

NOTE

The following procedure assumes that the instrument does not have any of the available

Zero/Span Valve Options installed.

See Section 7.4 for instructions for calibrating instruments possessing Z/S valve options.

1. Set the Analog Output Range:

Press this button to set

the analyzer for SNGL
DUAL or AUTO ranges

To change the value of the

reporting range span, enter the

number by pressing the key under

each digit until the expected value

appears.

SAMPLE RANGE = 500.000 PPM CO2 =X.XXX

< TST TST > CAL SETUP

SETUP X.X

CFG DAS RNGE PASS CLK MORE EXIT

SETUP X.X RANGE CONTROL MENU

MODE

SET UNIT EXIT

SETUP X.X RANGE: 500.000 CONC

0 0 5 0 0 .0 ENTR EXIT

SETUP X.X RANGE: 500.000 Conc

0 0 0 5 0 .0 ENTR EXIT

Press this button to select the

concentration units of measure:

PPB, PPM, UGM, MGM

EXIT ignores the new setting and

returns to the RANGE CONTROL

ENTR accepts the new setting and

RANGE CONTROL MENU.

MENU.

returns to the

Teledyne Analytical Instruments 37

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

2. Set the expected CO2 span gas concentration

The CO2 span

concentratio n valu es

automatically default to

40 0. 0 C o nc.

To change this value to

the a ctual concen tr ation of

th e span gas, en te r the

number by pressing the

button und er e ach digit

until the expect ed value

appears.

SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX

< TST TST > CAL SETUP

M-P CAL RANGE = 500.000 PPM CO2 =X.XXX

< TST TST > ZERO CONC EXIT

M-P CAL CO2 SPAN CONC: 400.000 Conc

0 0 0 4 5 .0 ENTR EXIT

This sequence causes the
analyzer to pr ompt for the

expe cted CO

co ncent ratio n.

EXIT ignores the new setting

and returns to t he previ ous

ENTR accepts the new setting

and returns to the
previous display..

span

2

display.

NOTE

For this Initial Calibration it is important to independently verify the precise CO2

Concentration Value of the SPAN gas.

If the source of the Span Gas is from a Calibrated Bottle, use the exact

concentration value printed on the bottle.

Teledyne Analytical Instruments 38

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

A

A

3. Perform the Zero/Span Calibration Procedure

SAMPLE* RANGE = 500.000 PPM CO2 =XXX.X

< TST TST > CAL SETUP

SAMPLE STABIL=XXX.X PPM CO2 =XXX.X

< TST TST > CAL SETUP

Allow zero gas to enter the sample port at the

M-P CAL STABIL=XXX.X PPM CO2 =XXX.X

< TST TST > CAL SETUP

M-P CAL STABIL=XXX.X PPM CO2 =XXX.X

< TST TST > ZERO CONC EXIT

M-P CAL STABIL=XXX.X PPM CO2 =XXX.X

< TST TST > ENTR CONC EXIT

CTION:

rear of the instru ment.

Set the Display to show the

STABIL test function.

Th is function calcul ates the

stability of the CO

m easurem ent

Wait until STABIL

falls below 1.0 ppm.

This may take several

minutes.

Press ENTR to changes the

OFFSE T & SLOPE values fo r th e

CO

m easu remen ts.

2

Press EXIT to leave the calibration

unchanged and return to the

previ ous me nu.

x

The SPAN button now

appears during the

transition from zero to

span..

If either the ZERO or
SPAN buttons fail to

appear see Section 11

for tr ouble shoo ting tips.

Allow span gas to enter the sample port at the

M-P CAL STAB IL=XXX.X PPM CO2 =XXX.X

< TST TST > SPAN CONC EXIT

M-P CAL RANGE = 500.000 PPM CO2 =XXX.X

< TST TST > ENTR SPAN CONC EXIT

M-P CAL RANGE = 500.000 PPM CO2 =XXX.X

< TST TST > ENTR CONC EXIT

CTION:

rear of the instrument.

The value of

STABIL may jump

significantly.

Wai t until it falls back

below 1.0 ppm

This may take several

minutes.

Press ENTR to change the

OFFSET & SLOPE values for the

CO

m easu remen ts.

2

Press EXIT to leave the calibration

unchanged and return to the

previ ous me nu.

EXIT returns to the main

SAMPLE dis play

Teledyne Analytical Instruments 39

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

3.8.1. Initial O2 Sensor Calibration Procedure

If your instrument has an O2 sensor option installed that should be calibrated as well.

3.8.1.1. O2 Calibration Setup

The pneumatic connections for calibrating are as follows:

2

at HIGH Span

Concentration

Calibrated N

2

Concentration

Calibrated O

at 20.8% Span

VENT

Figure 3-16: O2 Sensor Calibration Set Up

SENSOR ZERO GAS: Teledyne Instruments’ recommends using pure N2 when calibration the zero

O

2

point of your O

O

SENSOR SPAN GAS: Teledyne Instruments’ recommends using 21% O2 in N2 when calibration the

2

span point of your O

sensor option.

2

sensor option.

2

3.8.1.2. O2 Calibration Method

STEP 1 – SET O2 SPAN GAS CONCENTRATION :

Set the expected O

This should be equal to the percent concentration of the O
(default factory setting = 20.8%; the approximate O

span gas concentration.

2

span gas of the selected reporting range

2

content of ambient air).

2

Teledyne Analytical Instruments 40

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

SAMPLE RANGE = 500.000 PPM CO2 =XXX.X
< TST TST > CAL SETUP

SAMPLE GAS TO CAL:CO2

CO2 O2 ENTR EXIT

SAMPLE GAS TO CAL:O2

NOX O2 ENTREXIT

The O2 span concentration value automatically defaults to

If this is not the the concentration of the span gas being

used, toggle these buttons to set the correct concentration

of the O

20.8 %.

calibration gases.

2

M-P CAL A1:NXCNC1 =100PPM NOX=X.XXX

<TST TST> ZERO SPAN CONC EXIT

M-P CAL O2 SPAN CONC:20.8%

0 2 0 .8 0 ENTREXIT

EXIT ignores the new

setting and returns to

the previous display.

ENTR accepts the new

setting and returns to

the previous menu.

STEP 2 – ACTIVATE O

SENSOR STABILITY FUNCTION

2

To change the stability test function from NO

concentration to the O2 sensor output, press:

x

Teledyne Analytical Instruments 41

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

SAMPLE RANGE = 500.000 PPM CO2 =XXX.X
< TST TST > CAL SETUP

SETUP X.X PRIMARY SETUP MENU

CFG DAS RNGE PASS CLK MORE EXIT

SETUP X.X SECONDARY SETUP MENU
COMM VARS DIAG ALRM EXIT

SETUP X.X ENTER PASSWORD:818

8 1 8 ENTREXIT

Press EXIT 3

times to return

to SAMPLE

menu

SETUP X.X 0) DAS_HOLD_OFF=15.0 Minutes
<PREV NEXT> JUMP EDIT PRNT EXIT

Continue pressing NEXT until ...

SETUP X.X 2) STABIL_GAS=CO2

<PREV NEXT> JUMP EDIT PRNT EXIT

SETUP X.X STABIL_GAS:CO2

CO2 O2 ENTR EXIT

SETUP X.X STABIL_GAS:O2

CO2 O2 ENTR EXIT

NOTE

Use the same procedure to reset the STB test function to CO2 when the O2

calibration procedure is complete.

Teledyne Analytical Instruments 42

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

STEP 4 – O2 Zero/Span Calibration perform by pressing:

The Model GFC 7000TA Analyzer is now ready for operation.

Teledyne Analytical Instruments 43

Getting Started Model GFC7000TA Carbon Dioxide Analyzer

NOTE

Once you have completed the above set-up procedures, please fill out the Quality

Questionnaire that was shipped with your unit and return it to Teledyne

Instruments.

This information is vital to our efforts in continuously improving our service and

our products.

THANK YOU.

Teledyne Analytical Instruments 44

FAQ Model GFC7000TA Carbon Dioxide Analyzer

4. FREQUENTLY ASKED QUESTIONS

4.1. FAQ’s

The following is a list from the Teledyne Instruments’ Customer Service Department of the most
commonly asked questions relating to the Model CO

Q: How do I get the instrument to zero / Why is the zero key not displayed?

A: See Section 11.3.4 Inability to zero.

Q: How do I get the instrument to span / Why is the span key not displayed?

A: See Section 11.3.3 Inability to span.

Q: Why does the ENTR key sometimes disappear on the Front Panel Display?

A: During certain types of adjustments or configuration operations, the ENTR key will disappear if you

select a setting that is nonsensical (such as trying to set the 24-hour clock to 25:00:00) or out of the
allowable range for that parameter (such as selecting a DAS Holdoff period of more than 20 minutes).

Once you adjust the setting in question to an allowable value, the ENTR key will re-appear.

Analyzer.

2

Q: Is there an optional midpoint calibration?

A: There is an optional mid point linearity adjustment; however, midpoint adjustment is applicable only

to applications where CO
Service Department for more information on this topic.

Q: How do I make the display and data logger analog input agree?

A: This most commonly occurs when an independent metering device is used besides the data

logger/recorded to determine gas concentration levels while calibrating the analyzer. These
disagreements result from the analyzer, the metering device and the data logger having slightly
different ground levels.

Both the electronic scale and offset of the analog outputs can be adjusted (see Section 6.13.4.3).
Alternately, use the data logger itself as the metering device during calibrations procedures.

Q: How do I perform a leak check?

A: See Section 9.3.3.

Q: How do I measure the sample flow?

A: Sample flow is measured by attaching a calibrated rotameter, wet test meter, or other flow-

measuring device to the sample inlet port when the instrument is operating. The sample flow should
be 800 cm

3

/min 10%. See Section 9.3.4.

measurements are expected above 100 ppm. Call Teledyne Instruments’

2

Q: How long does the IR source last?

A: Typical lifetime is about 2-3 years.

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

Q: Where is the sintered filter/sample flow control orifice?

A: These components are located inside the flow control assembly that is attached to the inlet side of

the sample pump, see Figure 3-3. See Section 11.6.1 for instructions on disassembly and
replacement.

Q: How do I set up a SEQUENCE to run a nightly calibration check?

A: The setup of this option is located in Section 7.6.

Q: How do I set the analog output signal range and offset?

A: Instructions for this can be found in Section 6.13.4 which describes analog I/O configuration.

Q: What is the averaging time for an GFC 7000TA?

A: The default averaging time, optimized for ambient pollution monitoring, is 150 seconds for stable

concentrations and 10 seconds for rapidly changing concentrations; See Section10.5.1 for more
information. However, it is adjustable over a range of 0.5 second to 200 seconds (please contact
customer service for more information).

4.2. Glossary

Note: Some terms in this glossary may not occur elsewhere in this manual.

Term Description/Definition

10BaseT an Ethernet standard that uses twisted (“T”) pairs of copper wires to transmit at

10 megabits per second (Mbps)
100BaseT same as 10BaseT except ten times faster (100 Mbps)
APICOM name of a remote control program offered by Teledyne to its customers
ASSY
CAS
CD Corona Discharge, a frequently luminous discharge, at the surface of a

CE Converter Efficiency, the percentage of light energy that is actually converted

CEM
Chemical formulas that may be included in this document:

CO

2

C3H8 propane
CH4 methane
H2O water vapor
HC general abbreviation for hydrocarbon

Assembly

Code-Activated Switch

conductor or between two conductors of the same transmission line,

accompanied by ionization of the surrounding atmosphere and often by a power

loss

into electricity

Continuous Emission Monitoring

carbon dioxide

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

Term Description/Definition

HNO3 nitric acid
H2S hydrogen sulfide
NO nitric oxide
NO2 nitrogen dioxide
NOX nitrogen oxides, here defined as the sum of NO and NO2
NOy nitrogen oxides, often called odd nitrogen: the sum of NOX plus other

compounds such as HNO

PAN, N

O and other compounds as well)

2

NH3 ammonia
O

2

molecular oxygen

O3 ozone
SO2 sulfur dioxide

3

cm

metric abbreviation for cubic centimeter (replaces the obsolete abbreviation

CPU
DAC
DAS
DCE
DFU

Central Processing Unit

Digital-to-Analog Converter

Data Acquisition System

Data Communication Equipment

Dry Filter Unit

“cc”)

DHCP Dynamic Host Configuration Protocol. A protocol used by LAN or Internet

servers to automatically set up the interface protocols between themselves and

any other addressable device connected to the network
DIAG Diagnostics, the diagnostic settings of the analyzer.
DOM Disk On Module, a 44-pin IDE flash drive with up to 128MB storage capacity for

instrument’s firmware, configuration settings and data
DOS
DRAM
DR-DOS
DTE

Disk Operating System

Dynamic Random Access Memory

Digital Research DOS

Data Terminal Equipment

EEPROM Electrically Erasable Programmable Read-Only Memory also referred to as a

FLASH chip or drive
ESD
ETEST

Electro-Static Discharge

Electrical Test

Ethernet a standardized (IEEE 802.3) computer networking technology for local area

networks (LANs), facilitating communication and sharing resources
FEP Fluorinated Ethylene Propylene polymer, one of the polymers that Du Pont

markets as Teflon

®

Flash non-volatile, solid-state memory
FPI Fabry-Perot Interface: a special light filter typically made of a transparent plate

with two reflecting surfaces or two parallel, highly reflective mirrors

(definitions vary widely and may include nitrate (NO3),

3

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

Term Description/Definition

GFC
I2C bus a clocked, bi-directional, serial bus for communication between individual

IC Integrated Circuit, a modern, semi-conductor circuit that can contain many basic

IP
IZS
LAN
LCD
LED
LPM
MFC
M/R
MOLAR MASS the mass, expressed in grams, of 1 mole of a specific substance. Conversely,

NDIR
NIST-SRM
PC
PCA Printed Circuit Assembly, the PCB with electronic components, ready to use
PC/AT
PCB Printed Circuit Board, the bare board without electronic component
PFA Per-Fluoro-Alkoxy, an inert polymer; one of the polymers that Du Pont markets

PLC Programmable Logic Controller, a device that is used to control instruments

PLD
PLL
PMT Photo Multiplier Tube, a vacuum tube of electrodes that multiply electrons

P/N (or PN)
PSD
PTFE Poly-Tetra-Fluoro-Ethylene, a very inert polymer material used to handle gases

PVC Poly Vinyl Chloride, a polymer used for downstream tubing

Gas Filter Correlation

analyzer components

components such as resistors, transistors, capacitors etc in a miniaturized

package used in electronic assemblies

Internet Protocol

Internal Zero Span

Local Area Network

Liquid Crystal Display

Light Emitting Diode

Liters Per Minute

Mass Flow Controller

Measure/Reference

one mole is the amount of the substance needed for the molar mass to be the

same number in grams as the atomic mass of that substance.

EXAMPLE: The atomic weight of Carbon is 12 therefore the molar mass of

Carbon is 12 grams. Conversely, one mole of carbon equals the amount of

carbon atoms that weighs 12 grams.

Atomic weights can be found on any Periodic Table of Elements.

Non-Dispersive Infrared

National Institute of Standards and Technology - Standard Reference Material

Personal Computer

Personal Computer / Advanced Technology

as Teflon

®

based on a logic level signal coming from the analyzer

Programmable Logic Device

Phase Lock Loop

collected and charged to create a detectable current signal

Part Number

Prevention of Significant Deterioration

that may react on other surfaces; one of the polymers that Du Pont markets as

®

Teflon

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

Term Description/Definition

Rdg Reading
RS-232 specification and standard describing a serial communication method between

DTE (Data Terminal Equipment) and DCE (Data Circuit-terminating Equipment)

devices, using a maximum cable-length of 50 feet
RS-485 specification and standard describing a binary serial communication method

among multiple devices at a data rate faster than RS-232 with a much longer

distance between the host and the furthest device
SAROAD
SLAMS
SLPM Standard Liters Per Minute of a gas at standard temperature and pressure
STP
TCP/IP Transfer Control Protocol / Internet Protocol, the standard communications

TEC
TPC
USB Universal Serial Bus: a standard connection method to establish communication

VARS Variables, the variable settings of the instrument
V-F
Z/S

Storage and Retrieval of Aerometric Data

State and Local Air Monitoring Network Plan

Standard Temperature and Pressure

protocol for Ethernet devices

Thermal Electric Cooler

Temperature/Pressure Compensation

between peripheral devices and a host controller, such as a mouse and/or

touchscreen and a personal computer or laptop

Voltage-to-Frequency

Zero / Span

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

5. OPTIONAL HARDWARE AND SOFTWARE

This includes a brief description of the hardware and software options available for the Model GFC
7000TA Gas Filter Correlation Carbon Dioxide Analyzer. For assistance with ordering these options
please contact the Sales department of Teledyne Analytical Instruments at:

TELEDYNE ELECTRONIC TECHNOLOGIES

Analytical Instruments

16830 Chestnut Street
City of Industry, CA 91748

Telephone: [phone]
Fax: [phone]

Web: www.teledyne-ai.com

5.1. Rack Mount Kits (Options 20A, 20B, 21 and 23)

OPTION NUMBER DESCRIPTION

20A Rack mount brackets with 26 in. chassis slides.
20B Rack mount brackets with 24 in. chassis slides.

21 Rack mount brackets only
23 Rack Mount for External Pump Pack (No Slides).

Each of these options permits the Analyzer to be mounted in a standard 19" x 30" RETMA rack.

5.2. Current Loop Analog Outputs (Option 41)

This option adds isolated, voltage-to-current conversion circuitry to the analyzer’s analog outputs. This
option may be ordered separately for any of the analog outputs; it can be installed at the factory or added
later. Call TAI sales for pricing and availability.

The current loop option can be configured for any output range between 0 and 20 mA. Figure 5-1
provides installation instructions and illustrates a sample combination of one current output and two
voltage outputs configuration. Information on calibrating or adjusting these outputs can be found in
Section 6.13.4.4.

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

Figure 5-1: Current Loop Option Installed on the Motherboard

5.2.1. Converting Current Loop Analog Outputs to Standard Voltage
Outputs

NOTE

Servicing or handling of circuit components requires electrostatic discharge

protection, i.e. ESD grounding straps, mats and containers. Failure to use ESD

protection when working with electronic assemblies will void the instrument

warranty.

See Section 12 for more information on preventing ESD damage.

To convert an output configured for current loop operation to the standard 0 to 5 VDC output operation:

1. Turn off power to the analyzer.

2. If a recording device was connected to the output being modified, disconnect it.

3. Remove the top cover

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

 Remove the set screw located in the top, center of the rear panel

 Remove the screws fastening the top cover to the unit (four per side).

 Slide the cover back and lift straight up .

4. Disconnect the current loop option PCA from the appropriate connector on the motherboard (see
Figure 5-1).

5. Place a shunt between the leftmost two pins of the connector (see Figure 5-1).

6. Reattach the top case to the analyzer.

7. The analyzer is now ready to have a voltage-sensing, recording device attached to that output

5.3. Expendable Kits (Options 42C, 42D and 43)

OPTION NUMBER DESCRIPTION

OPT 42C
OPT 42D 1 full replacement’s volume of indicating soda-lime for the external CO2 scrubber

OPT 43

1 year’s supply of replacement of 47mm dia. particulate filters

included with options 51 & 53 (approximate active lifetime: 1 year)
Options 42 C & 42D

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

5.4. Calibration Valves Options

There are four available options involving Zero/span valves. From an operational and software
standpoint, all of the options are the same, only the source of the span and zero gases are different.

5.4.1. Ambient Zero/Pressurized Span Valve

This option requires that both zero air and span gas be supplied from external sources. It is specifically
designed for applications where span gas will be supplied from a pressurized bottle of calibrated CO
A critical flow control orifice, internal to the instrument ensures that the proper flow rate is maintained. An
internal vent line, isolated by a shutoff valve ensures that the gas pressure of the span gas is reduced to
ambient atmospheric pressure. Normally zero air would be supplied from zero air modules such as a
Teledyne Instruments Model 701.

In order to ensure that span gas does not migrate backwards through the vent line and alter the
concentration of the span gas, a gas line not less than 2 meters in length should be attached to the vent
span outlet on the rear panel of the analyzer. To prevent the buildup of back pressure, this vent line
should not be greater than 10 meters in length.

The following table describes the state of each valve during the analyzer’s various operational modes.

gas.

2

Table 5-1: Ambient Zero/Pressurized Span Valve Operating States

MODE VALVE CONDITION

Sample/Cal Open to SAMPLE inlet

SAMPLE

(Normal State)

ZERO CAL

SPAN CAL

Zero/Span Open to IZS inlet

Shutoff Valve Closed

Sample/Cal Open to ZERO/SPAN valve

Zero/Span Open to IZS inlet

Shutoff Valve Closed

Sample/Cal Open to ZERO/SPAN valve

Zero/Span Open to SHUTOFF valve

Shutoff Valve Open to PRESSURE SPAN Inlet

The minimum span gas flow rate required for this option is 800 cm3/min.

The state of the zero/span valves can also be controlled:
 Manually from the analyzer’s front panel by using the SIGNAL I/O controls located under the DIAG

Menu (Section 6.13.2),

 By activating the instrument’s AutoCal feature (Section 7.6),

 Remotely by using the external digital control inputs (Section 6.15.1.2 and Section 7.5.2), or;

 Remotely through the RS-232/485 serial I/O ports (see Appendix A-6 for the appropriate commands).

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

Housing

GFC Wheel

SAMPLE CHAMBER

Purge Gas

Flow Control

Scrubber

External CO2

(Option 51 only)

Heat Sync

GFC Motor

Figure 5-2: Internal Pneumatic Flow – Ambient Zero/Pressurized Span Valves

5.4.2. Ambient Zero/Ambient Span Valve

This valve option is intended for applications where zero air is supplied by a zero air generator like a
bottle of N
Model 700 or 702. Internal zero/span and sample/cal valves control the flow of gas through the
instrument, but because the calibrator limits the flow of span gas no shutoff valve is required.

In order to ensure that span gas does not migrate backwards through the vent line and alter the
concentration of the span gas, a gas line not less than 2 meters in length should be attached to the vent
span outlet on the rear panel of the analyzer. To prevent the buildup of back pressure, this vent line
should not be greater than 10 meters in length.

The following table describes the state of each valve during the analyzer’s various operational modes.

and span gas are being supplied by Gas Dilution Calibrator like the Teledyne Instruments

2

Table 5-2: Ambient Zero/Ambient Span Valve Operating States

Mode Valve Condition

SAMPLE

(Normal State)

ZERO CAL

SPAN CAL

Sample/Cal Open to SAMPLE inlet

Zero/Span Open to IZS inlet

Sample/Cal Open to ZERO/SPAN valve

Zero/Span Open to IZS inlet

Sample/Cal Open to ZERO/SPAN valve

Zero/Span Open to PRESSURE SPAN inlet

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

The minimum span gas flow rate required for this option is 800 cm3/min.

The state of the zero/span valves can also be controlled:
 Manually from the analyzer’s front panel by using the SIGNAL I/O controls located under the DIAG

Menu (Section 6.13.2),

 By activating the instrument’s AutoCal feature (Section 7.6),

 Remotely by using the external digital control inputs (Sections 6.15.1.2 and 7.5.2), or

 Remotely through the RS-232/485 serial I/O ports (see Appendix A-6).

Heat Sync

Housing

GFC Motor

GFC Wheel

SAMPLE CHAMBER

Purge Gas

Flow Control

Scrubber

External CO2

(Option 53 0nly)

Figure 5-3: Internal Pneumatic Flow – Ambient Zero/Ambient Span

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

5.5. Communication Options

5.5.1. Communications Cables

Type Description

Shielded, straight-through DB-9F to DB-25M cable, about 1.8 m long.

60A RS-232

60B RS-232

60C Ethernet

60D USB

5.5.2. RS-232 Multidrop (Option 62)

The multidrop option is used with any of the RS-232 serial ports to enable communications of up to eight
analyzers with the host computer over a chain of RS-232 cables via the instruments COM1 port (labeled
RS232. It is subject to the distance limitations of the RS 232 standard.

Used to interface with older computers or code activated switches with
DB-25 serial connectors.

Shielded, straight-through DB-9F to DB-9F cable of about 1.8 m
length.

Patch cable, 2 meters long, used for Internet and LAN
communications.

Cable for direct connection between instrument (rear panel USB port)
and PC or laptop computer.

The option consists of a small printed circuit assembly, which is seated on the analyzer’s CPU card (see
Figure 5-4) and is connected to the RS-232 and COM2 DB9 connectors on the instrument’s back panel
via a cable to the motherboard. One option 62 is required for each analyzer along with one 6’ straight­through, DB9 male  DB9 Female cable (P/N WR0000101).

For information on using and setting up this option (See Section 6.11.7)

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

Figure 5-4: Multi-drop/LVDS PCA Seated on CPU

5.6. Oxygen Sensor (OPT 65)

5.6.1. Theory of Operation

5.6.1.1. Paramagnetic measurement of O2

The oxygen sensor used in the GFC 7000TA analyzer utilizes the fact that oxygen is attracted into strong
magnetic field; most other gases are not, to obtain fast, accurate oxygen measurements.

The sensor’s core is made up of two nitrogen filled glass spheres, which are mounted on a rotating
suspension within a magnetic field (Figure 5-7). A mirror is mounted centrally on the suspension and light
is shone onto the mirror that reflects the light onto a pair of photocells. The signal generated by the
photocells is passed to a feedback loop, which outputs a current to a wire winding (in effect, a small DC
electric motor) mounted on the suspended mirror.

Oxygen from the sample stream is attracted into the magnetic field displacing the nitrogen filled spheres
and causing the suspended mirror to rotate. This changes the amount of light reflected onto the
photocells and therefore the output levels of the photocells. The feedback loop increases the amount of
current fed into the winding in order to move the mirror back into its original position. The more O
present, the more the mirror moves and the more current is fed into the winding by the feedback control
loop.

2

A sensor measures the amount of current generated by the feedback control loop which is directly
proportional to the concentration of oxygen within the sample gas mixture (see Figure 5-7).

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

Figure 5-5: Oxygen Sensor - Principle of Operation

5.6.1.2. Operation within the GFC 7000TA Analyzer

The oxygen sensor option is transparently integrated into the core analyzer operation. All functions can
be viewed or accessed through the front panel, just like the functions for CO

 The O

concentration is displayed in the upper right-hand corner, alternating with CO2

2

concentration.

2

 Test functions for O

slope and offset are viewable from the front panel along with the analyzer’s

2

other test functions.

sensor calibration is performed via the front panel CAL function and is performed in a nearly

 O

2

identical manner as the standard CO

 Stability of the O

sensor can be viewed via the front panel (see Section 3.3.2.1).

2

 A signal representing the currently measured O

The O

concentration range is 0-100% (user selectable) with 0.1% precision and accuracy and is

2

calibration. See Section 3.3.1 for more details.

2

concentration is available.

2

available to be output via the instrument’s analog output channel A3 (See Section 6.13.4).

The temperature of the O

sensor is maintained at a constant 50° C by means of a PID loop and can be

2

viewed on the front panel as test function O2 TEMP.

The O

sensor assembly itself does not have any serviceable parts and is enclosed in an insulated

2

canister.

5.6.1.3. Pneumatic Operation of the O2 Sensor

 Pneumatically, the O2 sensor is connected to the bypass manifold and draws a flow of about 120

cm³/min in addition to the normal sample flow rate and is separately controlled with its own critical
flow orifice. Figure 5-8 shows the internal pneumatics of the GFC 7000TA with the O2 Sensor
installed.

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

Figure 5-6: GFC 7000TA – Internal Pneumatics with O2 Sensor Option 65

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FAQ Model GFC7000TA Carbon Dioxide Analyzer

5.7. Special Features

5.7.1. Dilution Ratio Option

The Dilution Ration Option is a software option that is designed for applications where the Sample gas is
diluted before being analyzed by the Model GFC 7000TA. Typically this occurs in Continuous Emission
Monitoring (CEM) applications where the quality of gas in a smoke stack is being tested and the sampling
method used to remove the gas from the stack dilutes the gas.

Once the degree of dilution is known, this feature allows the user to add an appropriate scaling factor to
the analyzer’s CO
displayed on the instrument’s Front Panel Display and reported via the Analog and Serial Outputs reflect
the undiluted values.

Instructions for using the dilution ratio option can be found in Section 6.8.7.

5.7.2. Maintenance Mode Switch

concentration calculation so that the Measurement Range and concentration values

2

TAI’s instruments can be equipped with a switch that places the instrument in maintenance mode. When
present, the switch accessed by opening the hinged front panel and is located on the rearward facing side
of the display/touchscreen driver PCA; on the left side; near the particulate filter.

When in maintenance mode the instrument ignores all commands received via the com ports that alter
the operation state of the instrument. This includes all calibration commands, diagnostic menu commands
and the reset instrument command. The instrument continues to measure concentration and send data
when requested.

This option is of particular use for instruments connected to multidrop or Hessen protocol networks.

5.7.3. Second Language Switch

TAI’s instruments can be equipped with switch that activates an alternate set of display message in a
language other than the instruments default language. When present, the switch accessed by opening
the hinged front panel and is located on the rearward facing side of the display/touchscreen driver PCA;
on the right side.

To activate this feature, the instrument must also have a specially programmed Disk on Chip containing
the second language.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6. OPERATING INSTRUCTIONS

To assist in navigating the analyzer’s software, a series of menu trees can be found in Appendix A-1 of
this manual.

NOTES

The flow charts appearing in this contain typical representations of the analyzer’s display
during the various operations being described. These representations may differ slightly
from the actual display of your instrument.

The ENTR button may disappear if you select a setting that is in valid or out of th e allowable
range for that parameter, such as trying to set the 24-hour clock to 25:00:00. Once you
adjust the setting to an allowable value, the ENTR button will re-appear.

6.1. Overview of Operating modes

The GFC 7000TA software has a variety of operating modes. Most commonly, the analyzer will be
operating in SAMPLE mode. In this mode, a continuous read-out of the CO
on the front panel and output as an analog voltage from rear panel terminals, calibrations can be
performed, and TEST functions and WARNING messages can be examined.

concentration is displayed

2

The second most important operating mode is SETUP mode. This mode is used for performing certain
configuration operations, such as for the DAS system, the reporting ranges, or the serial (RS-232/RS­485/Ethernet) communication channels. The SET UP mode is also used for performing various
diagnostic tests during troubleshooting.

Figure 6-1: Front Panel Display

The Mode field of the front panel display indicates to the user which operating mode the unit is currently
running.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

Besides SAMPLE and SETUP, other modes the analyzer can be operated in are:

Table 6-1: Analyzer Operating modes

MODE MEANING

DIAG

M-P CAL This is the basic, multi-point calibration mode of the instrument and is activated by pressing

SAMPLE

SAMPLE A Indicates that unit is in SAMPLE Mode and AUTOCAL feature is activated.

SETUP1

SPAN CAL A

SPAN CAL M
SPAN CAL R Unit is performing span cal procedure initiated remotely via the RS-232, RS-4485 or digital i/o

ZERO CAL A

ZERO CAL M
ZERO CAL R Unit is performing zero cal procedure initiated remotely via the RS-232, RS-4485 or digital I/O

1

The revision of the Teledyne Instruments software installed in this analyzer will be displayed following the word

SETUP. E.g. “SETUP

One of the analyzer’s diagnostic modes is being utilized (See Section 6.13).

the CAL key.
Sampling normally, flashing indicates adaptive filter is on.

SETUP mode is being used to configure the analyzer (CO
process).

Unit is performing span cal procedure initiated automatically by the analyzer’s AUTOCAL
feature.

Unit is performing span cal procedure initiated manually by the user.

control inputs.
Unit is performing zero cal procedure initiated automatically by the analyzer’s AUTOCAL

feature.
Unit is performing zero cal procedure initiated manually by the user.

control inputs.

sampling will continue during this

2

G.4”

Finally, the various CAL modes allow calibration of the analyzer. Because of its importance, this mode is
described separately in Section 7.

6.2. Sample Mode

This is the analyzer’s standard operating mode. In this mode the instrument is analyzing the gas in the
sample chamber, calculating CO
panel display, the analog outputs and, if set up properly, the RS-232/485/Ethernet ports.

A value of “XXXX” displayed in the CO2 Concentration field means that the M/R

ratio is invalid because CO2 REF is either too high (> 4950 mVDC) or too low (<

concentration and reporting this information to the user via the front

2

NOTE

1250 VDC).

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.2.1. Test Functions

Test functions are shown on the front panel display while the analyzer is in SAMPLE mode. They provide
information about the present operating status of the instrument and can be used troubleshooting and can
be recorded in one of the DAS channels (Section 6.7) for data analysis. To view, press the <TST TST> buttons.

Table 6-2: Test Functions Defined

PARAMETER DISPLAY UNITS MEANING

Range

O2 Range

Stability

CO2 Measure

CO2 Reference

Measurement /

Reference Ratio

Sample Pressure

Sample Flow

Sample

Temperature

Bench

Temperature

Wheel

Temperature

Box Temperature

O2 Cell

Temperature

2

Photo-detector
Temp. Control

Voltage

Slope

Offset

O2 Sensor Slope 2

O2 Sensor Offset 2

Test channel

output signal

Current Time

1

Only appears when the instrument’s reporting range mode is set for DUAL or AUTO

2

Only appears when the optional O2 sensor is installed.

RANGE

RANGE1
RANGE2

1
1

O2 RANGE

STABIL

MEAS

REF

MR Ratio

PRES

SAMPLE FL

SAMP TEMP

BENCH TEMP

WHEEL TEMP

BOX TEMP

O2 CELL

TEMP

2

PHT DRIVE

SLOPE

OFFSET

O2 SLOPE

O2 OFFSET

TEST

TIME

PPB, PPM,

UGM, MGM

The full scale limit at which the reporting range of the analyzer is
currently set. THIS IS NOT the Physical Range of the instrument.
See Section 6.8.1 for more information.

% The range setting for the O2 Sensor

PPB, PPM

UGM, MGM

MV

MV

Standard deviation of CO2 concentration readings. Data points are
recorded every ten seconds using the last 25 data points.

The demodulated, peak IR detector output during the measure
portion of the GFC Wheel cycle.

The demodulated, peak IR detector output during the reference
portion of the GFC wheel cycle.

The result of CO2 MEAS divided by CO2 REF. This ratio is the

-

primary value used to compute CO

concentration. The value

2

displayed is not linearized.

In-Hg-A

The absolute pressure of the Sample gas as measured by a
pressure sensor located inside the sample chamber.

Sample mass flow rate. This is computed from the differential

cc/min

between the pressures measured up-stream and down-stream of the
sample critical flow orifice pressures.

C

C

C

C

C

mV

The temperature of the gas inside the sample chamber.

Optical bench temperature.

Filter wheel temperature.

The temperature inside the analyzer chassis.

sensor cell temperature.

O

2

The drive voltage being supplied to the thermoelectric coolers of the
IR photo-detector by the sync/demod Board.

The sensitivity of the instrument as calculated during the last

-

calibration activity. The SLOPE parameter is used to set the span
calibration point of the analyzer.

The overall offset of the instrument as calculated during the last

-

calibration activity. The OFFSET parameter is used to set the zero
point of the analyzer response.

- O2 slope, computed during zero/span calibration.

- O2 offset, computed during zero/span calibration.

mV, mA

-

Displays the signal level of the TEST analog output channel. Only
appears when the TEST channel has been activated.

The current time. This is used to create a time stamp on DAS
readings, and by the AUTOCAL feature to trigger calibration events.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

1

g

To view the TEST Functions press:

SAMPLE RANGE = 500.000 PPM CO2 = XXX.X
< TST TST > CAL SETUP

Toggle <TST TST> buttons

to scr oll throu

Only appears instrument is set

h list of

for DUAL or AU TO reporting
range modes.

2

Only appears if O2 Sensor

Option is installed.

RANGE
RANGE1
RANGE2

1
1

O2 RA N G E

STABIL

MEAS

REF

MR RATIO

PRES

SAMP FL

SAMP T EM P
BENCH TEMP
WHEEL TEMP

BOX TEM P

PHT DRIVE

SLOPE

OFFSET

TEST

TIME

Refer to

Table 6-2 for

definitions of

these test
functions.

Figure 6-2: Viewing TEST Functions

NOTE

A value of “XXXX” displayed for any of the TEST functions indicates an out-of-

range reading or the analyzer’s inability to calculate it.

All pressure measurements are represented in terms of absolute pressure.

Absolute, atmospheric pressure is 29.92 in-Hg-A at sea level. It decreases about 1

in-Hg per 300 m gain in altitude. A variety of factors such as air conditioning and

passing storms can cause changes in the absolute atmospheric pressure.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.2.2. Warning Messages

The most common instrument failures will be reported as a warning on the analyzer’s front panel and
through the COM ports. Section 11.1.1 explains how to use these messages to troubleshoot problems.
Section 3.2.3 shows how to view and clear warning messages.

Table 6-3 lists all warning messages for the current version of software.

Table 6-3: List of Warning Messages

MESSAGE MEANING

ANALOG CAL WARNING

BENCH TEMP WARNING

BOX TEMP WARNING

CANNOT DYN SPAN

CANNOT DYN ZERO
CONC ALRM1 WARNING
CONC ALRM2 WARNING

CONFIG INITIALIZED

DATA INITIALIZED

O2 CELL TEMP WARN

PHOTO TEMP WARNING

REAR BOARD NOT DET

RELAY BOARD WARN
SAMPLE FLOW WARN

The instrument’s A/D circuitry or one of its analog outputs is not calibrated.

The Temperature of the optical bench is outside the specified limits.

Remote span calibration failed while the dynamic span feature was set to turned on

Remote zero calibration failed while the dynamic zero feature was set to turned on

Configuration was reset to factory defaults or was erased.

Concentration alarm 1 is enabled and the measured CO2 level is ≥ the set point.

Concentration alarm 2 is enabled and the measured CO2 level is ≥ the set point.

Configuration storage was reset to factory configuration or erased.

DAS data storage was erased.

O2 sensor cell temperature outside of warning limits.

The temperature of the IR photometer is outside the specified limits.

The CPU is unable to communicate with the motherboard.

The firmware is unable to communicate with the relay board.

The flow rate of the sample gas is outside the specified limits.

SAMPLE PRESS WARN

SAMPLE TEMP WARN

SOURCE WARNING

SYSTEM RESET

WHEEL TEMP WARNING

Sample gas pressure outside of operational parameters.

The temperature of the sample gas is outside the specified limits.

The IR source may be faulty.

The computer was rebooted.

The Gas Filter Correlation wheel temperature is outside the specified limits.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

To view and clear warning messages:

TEST deactivates warning

messages

If the warning mes sage persists

after several attempts to clear it,

the mes sage may indicate a

real problem and not an artifact

NOTE:

of the warm-up period

SAMPLE SYST EM RESET CO2 = 0 .00

TEST CAL MSG CLR SETUP

SAMPLE RANGE=500 .000 PPM CO2 = 0.00

< TST TST > CAL MSG CLR SETUP

SA MPLE SYSTEM RESET CO2 = 0.00

T EST CAL MSG CLR SETUP

MSG displays warning messages.

Press CLR to clear the c urrent

message.

If more than one warning is active, the

next message will take its place

Once the l ast warning has been

cleared, the analyzer returns to

SAMPLE m ode

Figure 6-3: Viewing and Clearing GFC 7000TA WARNING Messages

6.3. Calibration Mode

Pressing the CAL key switches the GFC 7000TA into multi-point calibration mode. In this mode, the user
can calibrate the instrument or check the instruments calibration with the use of calibrated zero or span
gases.

If the instrument includes either the zero/span valve option or IZS option, the display will also include
CALZ and CALS keys. Pressing either of these keys also puts the instrument into multipoint calibration
mode.

 The CALZ key is used to initiate a calibration of the zero point.

 The CALS key is used to calibrate the span point of the analyzer. It is recommended that this span

calibration is performed at 90% of full scale of the analyzer’s currently selected reporting range.

Because of their critical importance and complexity, calibration operations are described in detail in
Section 7 of this manual. For more information concerning the zero/span, zero/span and IZS valve
options, See Section 5.4.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.4. SETUP MODE

The SETUP mode contains a variety of choices that are used to configure the analyzer’s hardware and
software features, perform diagnostic procedures, gather information on the instruments performance and
configure or access data from the internal data acquisition system (DAS). For a visual representation of
the software menu trees, refer to Appendix A. The areas access under the Setup mode are:

Table 6-4: Primary Setup Mode Features and Functions

MODE OR

FEATURE

Analyzer

Configuration

Auto Cal Feature

Internal Data

Acquisition (DAS)

Analog Output

Reporting Range

Configuration

Calibration

Password Security

Internal Clock

Configuration

Advanced SETUP

Features

TOUCHSCREEN

BUTTON

Table 6-5: Secondary Setup Mode Features and Functions

MODE OR FEATURE

External Communication

Channel Configuration

System Status Variables

System Diagnostic Features

CO2 Concentration Alarms

CFG

ACAL

DAS

RNGE

PASS

CLK

MORE

TOUCHSCREEN

BUTTON

COMM

VARS

DIAG

ALRM

DESCRIPTION

Lists key hardware and software configuration information 6.5

Used to set up and operate the AutoCal feature.
Only appears if the analyzer has one of the internal valve

options installed

Used to set up the DAS system and view recorded data 6.7

Used to configure the output signals generated by the
instruments Analog outputs.

Turns the calibration password feature ON/OFF 6.9

Used to Set or adjust the instrument’s internal clock 6.10

This button accesses the instruments secondary setup menu

DESCRIPTION

Used to set up and operate the analyzer’s various
external I/O channels including RS-232; RS-485,
modem communication and/or Ethernet access.

Used to view various variables related to the
instruments current operational status

Used to access a variety of functions that are used to
configure, test or diagnose problems with a variety of
the analyzer’s basic systems

Used to activate the analyzer’s two gas concentration

status alarms and set the alarm limits

MANUAL
SECTION

7.6

6.8

See

Table 6-5

MANUAL
SECTION

6.11 &

6.15

6.12

6.13

6.14

NOTE

Any changes made to a variable during one of the following procedures is not

acknowledged by the instrument until the ENTR button is pressed

If EXIT is pressed before the ENTR button, the analyzer will beep alerting the user

that the newly entered value has been lost.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

1

6.5. SETUP  CFG: Viewing the Analyzer’s Configuration
Information

Pressing the CFG button displays the instrument configuration information. This display lists the analyzer
model, serial number, firmware revision, software library revision, CPU type and other information. Use
this information to identify the software and hardware when contacting customer service. Special
instrument or software features or installed options may also be listed here.

Press NEXT and PREV to scroll through the
following list of Configuration information:

 MODEL NAME
 PART NUMBER
 SERIAL NUMBER
 SOFTWARE REVISIO N
 LIBRARY REVISION



iCHIP SOFTWARE REVISION



HES S E N PROTOCOL R EVISION



ACT IVE SPECIA L SOFTWARE

 CP U TYP E
 DATE FACTORY CONFIGURATION

OPTIONS

SAVED

1

1

1

SAMPLE* RANGE = 500.000 PPB CO2 =X.XXX

< TST TST > CAL SETUP

SAMPLE PRIMARY SETUP MENU

CFG DAS RNGE PASS CLK MORE EXIT

SAMPLE T360 CO2 ANALYZER

NEXT PREV EXIT

Press EXIT at any

time to return to the

SAMPLE di spl ay

Press EXIT at

any time to

return to SETUP

menu

Only ap pe ars if rel evant optio n of Feat ure is act iv e.

6.6. SETUP  ACAL: Automatic Calibration

Instruments with one of the internal valve options installed can be set to automatically run calibration
procedures and calibration checks. These automatic procedures are programmed using the submenus
and functions found under the ACAL menu.

A menu tree showing the ACAL menu’s entire structure can be found in Appendix A-1 of this manual.
Instructions for using the ACAL feature are located in the Section 7.6 of this manual along with all other

information related to calibrating the analyzer.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.7. SETUP  DAS: Using the Data Acquisition System (DAS)

The GFC 7000TA analyzer contains a flexible and powerful, internal data acquisition system (DAS) that
enables the analyzer to store concentration and calibration data as well as a host of diagnostic
parameters. The DAS of the GFC 7000TA can store up to about one million data points, which can,
depending on individual configurations, cover days, weeks or months of valuable measurements. The
data are stored in non-volatile memory and are retained even when the instrument is powered off. Data
are stored in plain text format for easy retrieval and use in common data analysis programs (such as
spreadsheet-type programs).

The DAS is designed to be flexible, users have full control over the type, length and reporting time of the
data. The DAS permits users to access stored data through the instrument’s front panel or its
communication ports. Using APICOM, data can even be retrieved automatically to a remote computer for
further processing.

The principal use of the DAS is logging data for trend analysis and predictive diagnostics, which can
assist in identifying possible problems before they affect the functionality of the analyzer. The secondary
use is for data analysis, documentation and archival in electronic format.

To support the DAS functionality, Teledyne Instruments offers APICOM, a program that provides a visual
interface for remote or local setup, configuration and data retrieval of the DAS (Section 6.7). The
APICOM manual, which is included with the program, contains a more detailed description of the DAS
structure and configuration.

The GFC 7000TA is configured with a basic DAS configuration, which is enabled by default. New data
channels are also enabled by default but each channel may be turned off for later or occasional use.
Note that DAS operation is suspended while its configuration is edited through the front panel. To
prevent such data loss, it is recommended to use the APICOM graphical user interface for DAS changes.

The green SAMPLE LED on the instrument front panel, which indicates the analyzer status, also indicates
certain aspects of the DAS status:

Table 6-6: Front Panel Sample LED Status Indicators for DAS

LED STATE DAS Status

OFF System is in calibration mode. Data logging can be enabled or disabled for this mode.

Calibration data are typically stored at the end of calibration periods, concentration data are
typically not sampled, diagnostic data should be collected.

BLINKING Instrument is in hold-off mode, a short period after the system exits calibrations. IDAS

channels can be enabled or disabled for this period. Concentration data are typically disabled
whereas diagnostic should be collected.

ON

The DAS can be disabled only by disabling or deleting its individual data channels.

Sampling normally.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.7.1. DAS Structure

The DAS is designed around the feature of a “record”. A record is a single data point of one parameter,
stored in one (or more) data channels and generated by one of several triggering event. The entire DAS
configuration is stored in a script, which can be edited from the front panel or downloaded, edited and
uploaded to the instrument in form of a string of plain-text lines through the communication ports.

DAS data are defined by the PARAMETER type and are stored through different triggering EVENTS in
data CHANNELS, which relate triggering events to data parameters and define certain operational
functions related to the recording and reporting of the data.

6.7.1.1. DAS Channels

The key to the flexibility of the DAS is its ability to store a large number of combinations of triggering
events and data parameters in the form of data channels. Users may create up to 20 data channels and
each channel can contain one or more parameters. For each channel one triggering event is selected
and up to 50 data parameters, which can be the same or different between channels. Each data channel
has several properties that define the structure of the channel and allow the user to make operational
decisions regarding the channel (Table 6-7).

Table 6-7: DAS Data Channel Properties

PROPERTY DESCRIPTION DEFAULT SETTING RANGE

NAME

TRIGGERING

EVENT

NUMBER &

PARAMETER

LIST

STARTING

DATE

SAMPLE

PERIOD

REPORT

PERIOD

NUMBER OF

RECORDS

RS-232

REPORT

CHANNEL

ENABLED

CAL HOLD OFF Disables sampling of data parameters while

The name of the data channel.

The event that triggers the data channel to measure
and store its data parameters. See APPENDIX A-5
for a list of available triggering events.

A user-configurable list of data types to be recorded
in any given channel. See APPENDIX A-5 for a list
of available parameters

The starting date when a channel starts collecting
data

The amount of time between each data point that is
averaged into one mean reported every REPORT
PERIOD.

The amount of time between each channel data
point.

The number of reports that will be stored in the data
file. Once the specified limit has been exceeded,
the oldest data are over-written to make space for
new data.

Enables the analyzer to automatically report channel
values to the RS-232 ports.

Enables or disables the channel. Provides a
convenient means to temporarily disable a data
channel.

instrument is in calibration mode.
When enabled here – there is also a length of the

DAS HOLD OFF after calibration mode, which is set
in the VARS menu.

“NONE” Up to 6 letters and digits

(more with APICOM, but

only the first six are

displayed on the front

panel).

ATIMER See Appendix A-5 For a

complete list.

1 – DETMES See Appendix A-5 For a

complete list.

01-JAN-03 Any actual date in the past

or future.

000:01:00 000:00:01 to 366:23:59

(Days:Hours:Minutes)

000:01:00

100 1 to 1 million, limited by

OFF

ON

OFF

000:00:01 to

366:23:59

(Days:Hours:Minutes)

available storage space.

OFF or ON

OFF or ON

OFF or ON

(Section 6.7.2.11.)

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.7.1.2. DAS Parameters

Data parameters are types of data that may be measured and stored by the DAS. For each Teledyne
Instruments analyzer model, the list of available data parameters is different, fully defined and not
customizable. Appendix A-5 lists firmware specific data parameters for the analyzer. DAS parameters
include things like CO
the analyzer, pressures and flows of the pneumatic subsystem and other diagnostic measurements as
well as calibration data such as slope and offset.

Most data parameters have associated measurement units, such as mV, ppb, cm³/min, etc., although
some parameters have no units. With the exception of concentration readings, none of these units of
measure can be changed. To change the units of measure for concentration readings See Section 6.8.6.

DAS does not keep track of the unit of each concentration value and DAS data files

may contain concentrations in multiple units if the unit was changed during data

concentration measurements, temperatures of the various heaters placed around

2

Note

acquisition.

Each data parameter has user-configurable functions that define how the data are recorded:

Table 6-8: DAS Data Parameter Functions

FUNCTION EFFECT

PARAMETER

SAMPLE MODE

PRECISION

STORE NUM.

SAMPLES

Instrument-specific parameter name.
INST: Records instantaneous reading.
AVG: Records average reading during reporting interval.
MIN: Records minimum (instantaneous) reading during reporting interval.
MAX: Records maximum (instantaneous) reading during reporting interval.
SDEV: Records the standard deviation of the data points recorded during the reporting interval.
Decimal precision of parameter value (0-4).
OFF: stores only the average (default).

ON: stores the average and the number of samples in each average for a parameter. This
property is only useful when the AVG sample mode is used. Note that the number of samples
is the same for all parameters in one channel and needs to be specified only for one of the
parameters in that channel.

Users can specify up to 50 parameters per data channel (the GFC 7000TA provides about 30
parameters). However, the number of parameters and channels is ultimately limited by available
memory.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.7.1.3. DAS Triggering Events

Triggering events define when and how the DAS records a measurement of any given data channel.
Triggering events are firmware-specific and a complete list of Triggers for this model analyzer can be
found in Appendix A-5. The most commonly used triggering events are:

 ATIMER: Sampling at regular intervals specified by an automatic timer. Most trending

information is usually stored at such regular intervals, which can be instantaneous or
averaged.

 EXITZR, EXITSP, SLPCHG (exit zero, exit span, slope change): Sampling at the end of

(irregularly occurring) calibrations or when the response slope changes. These triggering
events create instantaneous data points, e.g., for the new slope and offset (concentration
response) values at the end of a calibration. Zero and slope values are valuable to
monitor response drift and to document when the instrument was calibrated.

 WARNINGS: Some data may be useful when stored if one of several warning messages

appears such as WTEMPW (GFC wheel temperature warning) or PPRESW (purge
pressure warning). This is helpful for trouble-shooting by monitoring when a particular
warning occurred.

6.7.2. Default DAS Channels

A set of default Data Channels has been included in the analyzer’s software for logging CO2
concentration and certain predictive diagnostic data. These default channels include but are not limited
to:

CONC: Samples CO
and date stamp. Readings during calibration and calibration hold off are not included in the data. By
default, the last 800 hourly averages are stored.

PNUMTC: Collects sample flow and sample pressure data at five minute intervals and stores an average
once a day with a time and date stamp. This data is useful for monitoring the condition of the pump and
critical flow orifice (sample flow) and the sample filter (clogging indicated by a drop in sample pressure)
over time to predict when maintenance will be required. The last 360 daily averages (about 1 year) are
stored.

CALDAT: Logs new slope and offset every time a zero or span calibration is performed. This Data
Channel also records the instrument readings just prior to performing a calibration. This information is
useful for performing predictive diagnostics as part of a regular maintenance schedule (See Section 9.1).

STBZRO: Logs the concentration stability, the electronic output of the IR detector of the most recent
measure phase and the measure/reference ratio every time the instrument exits the zero calibration
mode. Data from the last 200 zero calibrations is stored. A time and date stamp is recorded for every
data point logged. This information is useful for performing predictive diagnostics as part of a regular
maintenance schedule (See Section 9.1).

concentration at one minute intervals and stores an average every hour with a time

2

STBSPN: Logs the electronic output of the IR detector of the most recent measure phase and the
measure/reference ratio every time the instrument exits span calibration mode. Data from the last 200
zero calibrations is stored. A time and date stamp is recorded for every data point logged. This
information is useful for performing predictive diagnostics as part of a regular maintenance schedule (See
Section 9.1).

Teledyne Analytical Instruments 74

Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

TEMP: Samples the analyzer’s bench temperature, box temperature and PHT cooler drive voltage every

five minutes and records an average once every six hours. Data from the last 400 averaging periods is
recorded. A time and date stamp is recorded for every data point logged. This information is useful for
performing predictive diagnostics as part of a regular maintenance schedule (See Section 9.1).

Note

The CALDAT, STBZRO and STBSPN channels collect data based on events (e.g. a

calibration operation) rather than a timed interval. This does not represent any

specific length of time since it is dependent on how often calibrations are

performed.

Triggering Events and Data Parameters/Functions for these default channels are:

LIST OF PARAMETERS

PARAMETER: SMPLFLW

STORE NUM SAMPLES OFF

PARAMETER: SMPLPRS

STORE NUM SAMPLES OFF

STORE NUM SAMPLES OFF

STORE NUM SAMPLES OFF

STORE NUM SAMPLES OFF

STORE NUM SAMPLES OFF

PARAMETER: BOXTMP

STORE NUM SAMPLES OFF

STORE NUM SAMPLES OFF

MODE: AVG

PRECISION: 1

MODE: AVG

PRECISION: 1

PARAMETER: STABIL

MODE: INST

PRECISION:2

PARAMETER: DETMES

MODE: INST

PRECISION: 1

PARAMETER: RATIO

MODE: INST

PRECISION: 3

PARAMETER: BNTEMP

MODE: AVG

PRECISION:1

MODE: AVG

PRECISION: 1

PARAMETER: PHTDRV

MODE: AVG

PRECISION: 1

LIST OF CHANNELS

LIST OF PARAMETERS

NAME: CONC
EVENT: ATIMER
REPORT PERIOD : 000:01:00
NO. OF RECORDS: 800
RS-232 REPORT: OFF

NAME: PNUMTC
EVENT: ATIMER

REPORT PERIOD: 001:00:00

NO. OF RECORDS: 360

RS-232 REPORT: OFF

CHANNEL ENABLED: ON

CAL HOLD OFF: OFF

NAME: STBZRO

EVENT: EXITZR

REPORT PERIOD: N/A

NO. OF RECORDS:200

RS-232 REPORT: OFF

CHANNEL ENABLED: ON

CAL HOLD OFF: OFF

REPORT PERIOD: 000:06:00

NAME: TEMP

EVENT: ATIMER

NO. OF RECORDS:400

RS-232 REPORT: OFF

CHANNEL ENABLED: ON

CAL HOLD OFF: OFF

CHANNEL ENABLED: ON
CAL HOLD OFF: ON

NAME: CALDAT
EVENT: SLPCHG
REPORT PERIOD: N/A
NO. OF RECORDS:200
RS-232 REPORT: OFF
CHANNEL ENABLED: ON
CAL HOLD OFF: OFF

NAME: STBSPN
EVENT: EXITSP
REPORT PERIOD: N/A
NO. OF RECORDS:200
RS-232 REPORT: OFF
CHANNEL ENABLED: ON
CAL HOLD OFF: OFF

PARAMETER: CONC1
MODE: AVG
PRECISION: 1
STORE NUM SAMPLES OFF

PARAMETER: SLOPE1
MODE: INST
PRECISION:3
STORE NUM SAMPLES OFF

PARAMETER: OFSET1
MODE: INST
PRECISION: 1
STORE NUM SAMPLES OFF

PARAMETER: ZSCNC1
MODE: INST
PRECISION: 1
STORE NUM SAMPLES OFF

PARAMETER: DETMES
MODE: INST
PRECISION: 1
STORE NUM SAMPLES OFF

PARAMETER: RATIO
MODE: INST
PRECISION: 3
STORE NUM SAMPLES OFF

Figure 6-4: Default DAS Channels Setup

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

These default Data Channels can be used as they are, or they can be customized from the front panel to
fit a specific application. They can also be deleted to make room for custom user-programmed Data
Channels.

Appendix A-5 lists the firmware-specific DAS configuration in plain-text format. This text file can either be
loaded into APICOM and then modified and uploaded to the instrument or can be copied and pasted into
a terminal program to be sent to the analyzer.

NOTE

Sending an DAS configuration to the analyzer through its COM ports will replace

the existing configuration and will delete all stored data. Back up any existing

data and the DAS configuration before uploading new settings.

These default Data Channels can be used as they are, or they can be customized from the front panel to
fit a specific application. They can also be deleted to make room for custom user-programmed Data
Channels.

Appendix A-5 lists the firmware-specific DAS configuration in plain-text format. This text file can either be
loaded into APICOM and then modified and uploaded to the instrument or can be copied and pasted into
a terminal program to be sent to the analyzer.

NOTE

Sending an DAS configuration to the analyzer through its COM ports will replace

the existing configuration and will delete all stored data. Back up any existing

data and the DAS configuration before uploading new settings.

6.7.2.1. DAS Configuration Limits

The number of DAS objects are limited by the instrument’s finite storage capacity. For information
regarding the maximum number of channels, parameters, and records and how to calculate the file size
for each data channel, refer to the DAS manual downloadable from the TAI website at
http://www.teledyne-api.com/manuals/.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.7.2.2. Viewing DAS Data and Settings

DAS data and settings can be viewed on the front panel through the following touchscreen buttons
sequence.

SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX

< TST TST > CAL SETUP

SET UP X. X

CFG DAS RNGE PASS CLK MORE EXIT

SET UP X. X DATA ACQ UIS I TION

VIEW

SETUP X.X CONC : DATA AV AI LA BL E

NEXT VIEW EXIT

SETUP X.X PNUMTC: DATA AVAILABLE

PREV NEXT VIEW EXIT

PRIMARY SETUP MENU

EDIT EXIT

SETUP X.X 00 :00:00 NXCNC1=0.0 PPM

PV10 PREV NEXT NX10 <PRM PRM> EXIT

SETUP X.X 00:00: 00 SMPFLW=0 00.0 cc / m

TOUCHSCREEN BUTTON FUNCTIONS

Buttons only appear when applicable.

<PRM PRM> EXIT

BUTTON FUNCTION

<PRM Moves to the next Parameter
PRM > Moves to th e pre v ious

NX10 Moves the view forward 10

NEXT Moves to the next data

PREV

PV10 Moves the view back 10 data

Parameter

data points/channels

point/ channe l

Moves to the previous data

point/ channe l

points /channels

SET UP X. X CALDAT: DATA AVAILABLE

PRE V NEXT VIEW EXIT

SETUP X.X 00:00:00 NXSLP1=0.000

PV10 PREV <PRM PRM> EXIT

SET UP X. X STBZRO: DAT A AVAILABLE

PRE V NEXT VIEW EXIT

SETUP X.X 0 0: 00: 0 0 STABIL= 0.000

PV10 PREV <PRM PRM> EXIT

SET UP X. X STBSPN: DATA AVAILABLE

PRE V NEXT VIEW EXIT

SETUP X.X 00:00:00 DETMES=0.000

PV10 PREV <PRM PRM> EXIT

SET UP X. X TEMP: DATA AVAILABLE

PRE V NEXT VIEW EXIT

SETUP X.X 00:00:00 BOXTMP=0.000

PV10 PREV <PRM PRM> EXIT

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.7.2.3. Editing DAS Data Channels

DAS configuration is most conveniently done through the APICOM remote control program. The
following list of key strokes shows how to edit using the front panel.

EXIT will return to the

previ ous SAMPLE

display.

Moves the

display up &

down the list of
Data Channels

SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX
< TST TST > CAL SETUP

SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT

Main Data Acquisition Menu

SETUP X.X DATA ACQUISITION

VIEW

EDIT EXIT

SAMPLE ENTE R SETUP PASS : 818

8 1 8 ENTR EXIT

SETUP X.X 0) CONC: ATIMER, 1, 900

PREV NEXT INS DEL EDIT PRNT EXIT

Edit Data Channel Menu

Exits to the Main

Data A cquisition

Menu

Inserts a new Data

Channel into the list

BEFORE th e Channel

currently being displayed

Moves the display

between th e

PROPERTIES for this

data channel.

Allows t o ed it the ch an ne l name , see next key sequence.

Deletes Th e Data
Channel cu rrently

bei ng d isplayed

SETUP X.X NAME:CONC

<SET SET> EDIT PRNT EXIT

Reports the con fi gur at ion of current

da ta chan nels t o t he RS -232 por ts.

Expo rt s the

configuration of all

data ch annels to

RS-232 interface.

Exits returns to the

previous Menu

When editing the data channels, the top line of the display indicates some of the configuration
parameters. For example, the display line:

0) CONC: ATIMER, 4, 800

translates to the following configuration:
Channel No.: 0

NAME: CONC
TRIGGER EVENT: ATIMER
PARAMETERS: Four parameters are included in this channel
EVENT: This channel is set up to record 800 data points.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

R

To edit the name of a data channel, follow the above touchscreen button sequence and then press:

From the end of the p revious button sequence …

SETUP X.X NAME:CONC

<SET SET> EDIT PRI NT EXIT

SETUP X.X NAME:CONC

C O N C - - ENTR EXIT

ENTRacc epts t he new s trin g

and returns to the p revio us

menu.

EXIT ignores the new string

and returns to the p revio us

menu.

Press e ach button repeatedly to cycle through

the available character set:

0-9, A-Z, space ’ ~ !  # $ % ^ & * ( ) - _ = +[ ]

{ } < >\ | ; : , . / ?

6.7.2.4. Trigger Events

To edit the list of data parameters associated with a specific data channel, press:

From the DATA ACQUISITIO N menu

(see Sect ion 6.7.2. 2)

Edit Dat a Channel Me nu

SETUP X.X 0) CONC: ATIMER, 1, 900

PREV NEXT INS DEL E DIT PRNT EXIT

Exits t o the Mai n

Data Acquisition

menu

SETUP X.X NAME:CONC

<SET SET> EDIT PRINT EXIT

SETUP X.X EVENT:ATIME

<SET SET> EDIT PRINT EXIT

SETUP X.X EVENT:ATIMER

<PREV NEXT> ENTR EXIT

ENTR accepts th e ne w string

and re turns to the previo us

menu.

EXIT ignores the new string

and re turns to the previo us

menu.

Press each button repeatedly to cycle through

the list of available trigger events.

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

A

6.7.2.5. Editing DAS Parameters

Data channels can be edited individually from the front panel without affecting other data channels.
However, when editing a data channel, such as during adding, deleting or editing parameters, all data for
that particular channel will be lost, because the DAS can store only data of one format (number of
parameter columns etc.) for any given channel. In addition, an DAS configuration can only be uploaded
remotely as an entire set of channels. Hence, remote update of the DAS will always delete all current
channels and stored data.

To modify, add or delete a parameter, follow the instruction shown in Section 6.7.2.2 then press:

From th e DATA ACQUISITION menu

(see Sect ion 6.7.2.2)

Edit Data Channel Menu

SETUP X.X 0) CONC: ATIMER, 1, 900

PREV NEXT INS DEL E DIT PRNT EXIT

Exits to the main

Data Acquisition

menu

YES wil l del et e

all dat a i n that

entire channel.

Moves the

display between

existing

Parameters

Insert s a new Par ameter

before the currently

displa yed Para meter

SETUP X.X NAME:CONC

<SET SET> EDIT PRINT EXIT

Press SET> button until…

SETUP X.X PARAMETERS:1

<SET SET> EDIT PRINT EXIT

SETUP X.X E DIT PAR

YES NO

SETUP X.X 0) PAR AM =CO NC1 , MOD E=AV G

PREV NEXT INS DEL EDIT EXIT

Deletes the Parameter

currently displayed.

MS (DELETE DAT A )

Edit Data Parameter Menu

NO returns to

the previou s

menu and

retains all data.

Exits to the main

Data Acquisition

menu

Use to co nf igure

the functions for

this Parameter.

Teledyne Analytical Instruments 80

Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

To configure a specific data parameter, press:

FROM THE EDIT DATA PARAMETER MENU

SETUP X.X 0) PARAM=CONC1, MODE=AVG
PREV NEXT INS DEL EDIT EXIT

SET UP X. X PARAMETERS:CONC1

SET> EDIT EXIT

SET UP X. X SAM PLE MODE:AVG

<SET SET> EDIT EXIT

(see previous section)

SETUP X.X PARAMETERS: 1

PRE V NEX T ENTR EXIT

SETUP X.X SA M PLE M ODE: IN ST

INST AVG MIN MAX EXIT

If more than on parameter is active for

this channel, these cycle through list of

existing Parameters.

Press the bu tton for the d esire d mod e

SETUP X.X PRECISION: 1

<SET SET> EDIT EXIT

SETUP X.X ST ORE NUM. SAM P LES: OFF

<SET EDIT EXIT

SET UP X. X PRECISION: 1

1 EXIT

Set for 0-4

SET UP X. X S T OR E N U M. SAMPL E S : O F F

OFF ENTR EXIT

Turn ON or OFF

ENTR accepts the new

setting and returns to the

previous me nu.

EXIT ignores the ne w setting

and ret urns t o the p revious

<SET Returns to

pr evious

Fu ncti ons

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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.7.2.6. Sample Period and Report Period

The DAS defines two principal time periods by which sample readings are taken and permanently
recorded:

 SAMPLE PERIOD: Determines how often DAS temporarily records a sample reading of the

parameter in volatile memory. The SAMPLE PERIOD is set to one minute by default and generally
cannot be accessed from the standard DAS front panel menu, but is available via the instruments
communication ports by using APICOM or the analyzer’s standard serial data protocol.

SAMPLE PERIOD is only used when the DAS parameter’s sample mode is set for AVG, MIN or
MAX.

 REPORT PERIOD: Sets how often the sample readings stored in volatile memory are processed,

(e.g. average, minimum or maximum are calculated) and the results stored permanently in the
instruments Disk-on-Chip as well as transmitted via the analyzer’s communication ports. The
REPORT PERIOD may be set from the front panel.

If the INST sample mode is selected the instrument stores and reports an instantaneous reading
of the selected parameter at the end of the chosen REPORT PERIOD

In AVG, MIN or MAX sample modes, the settings for the SAMPLE PERIOD and the REPORT PERIOD
determine the number of data points used each time the average, minimum or maximum is calculated,
stored and reported to the com ports. The actual sample readings are not stored past the end of the of
the chosen REPORT PERIOD.

Also, the SAMPLE PERIOD and REPORT PERIOD intervals are synchronized to the beginning and end
of the appropriate interval of the instruments internal clock.

 If SAMPLE PERIOD were set for one minute the first reading would occur at the beginning of the next

full minute according to the instrument’s internal clock.

 If the REPORT PERIOD were set for of one hour the first report activity would occur at the beginning

of the next full hour according to the instrument’s internal clock.

EXAMPLE: Given the above settings, if DAS were activated at 7:57:35 the first sample would
occur at 7:58 and the first report would be calculated at 8:00 consisting of data points for 7:58.
7:59 and 8:00.

During the next hour (from 8:01 to 9:00) the instrument will take a sample reading every minute
and include 60 sample readings.

When the STORE NUM. SAMPLES feature is turned on the instrument will also store how many sample
readings were used for the AVG, MIN or MAX calculation but not the readings themselves.

REPORT PERIODS IN PROGRESS WHEN INSTRUMENT IS POWERED OFF

If the instrument is powered off in the middle of a REPORT PERIOD, the samples accumulated so far
during that period are lost. Once the instrument is turned back on, the DAS restarts taking samples and
temporarily them in volatile memory as part of the REPORT PERIOD currently active at the time of
restart. At the end of this
turned back on will be included in any AVG, MIN or MAX calculation. Also, the STORE NUM. SAMPLES
feature will report the number of sample readings taken since the instrument was restarted.

REPORT PERIOD only the sample readings taken since the instrument was

Teledyne Analytical Instruments 82