INSTRUCTION MANUAL
MODEL GFC7001E
CARBON MONOXIDE ANALYZER
© TELEDYNE ANALYTICAL INSTRUMENTS
(TAI)
16830 Chestnut St.
City of Industry, Ca. 91748
TEL:
626-961-9221
TEL:
626-934-1500
FAX:
626-961-2538
E-MAIL:
ai-sales@teledyne.com
WEB SITE:
www.teledyne-ai.com
GFC7001E
Revision A7
Copyright 2004 TAI Inc.
November 30, 2004
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Safety Messages
Your safety and the safety of others is very important. We have provided many
important safety messages in this manual. Please read these messages carefully.
A safety message alerts you to potential hazards that could hurt you or others.
Each safety message is associated with a safety alert symbol. These symbols are
found in the manual and inside the instrument. The definition of these symbols is
described below:
GENERAL WARNING/CAUTION: Refer to the instructions
for details on the specific danger.
CAUTION: Hot Surface Warning
CAUTION: Electrical Shock Hazard
Technician Symbol: All operations marked with this symbol
are to be performed by qualified maintenance personnel
only.
CAUTION
The analyzer should only be used for the purpose and in
the manner described in this manual. If you use the
analyzer in a manner other than that for which it was
intended, unpredictable behavior could ensue with
possible hazardous consequences.
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TABLE OF CONTENTS
1. GFC7001E DOCUMENTATION.......................................................................1
1.1. USING THIS MANUAL ......................................................................................................................2
2. SPECIFICATIONS, AGENCY APPROVALS, AND WARRANTY.....................5
2.1. SPECIFICATIONS ............................................................................................................................5
2.2. EPA EQUIVALENCY DESIGNATION ...................................................................................................7
2.3. WARRANTY....................................................................................................................................8
3. GETTING STARTED........................................................................................10
3.1. UNPACKING AND INITIAL SET UP....................................................................................................10
3.1.1. Electrical Connections........................................................................................................12
3.1.2. Pneumatic Connections: ....................................................................................................16
3.2. INITIAL OPERATION.......................................................................................................................22
3.2.1. Start Up .............................................................................................................................22
3.2.2. Warm Up ...........................................................................................................................23
3.2.3. Warning Messages ............................................................................................................23
3.2.4. Functional Check ...............................................................................................................24
3.3. INITIAL CALIBRATION PROCEDURE .................................................................................................25
4. FREQUENTLY ASKED QUESTIONS..............................................................31
5. OPTIONAL HARDWARE AND SOFTWARE ..................................................33
5.1. RACK MOUNT OPTION ..................................................................................................................33
5.2. ZERO/SPAN/SHUTOFF VALVE OPTIONS..........................................................................................33
5.2.1. Zero/Span/Shutoff Valve Option 50 ....................................................................................34
5.2.2. Zero/Span Valve Option 51 ................................................................................................35
5.2.3. Zero/Span Valve Option 52 ................................................................................................35
5.2.4. Zero/Span Valve Option 53 ................................................................................................36
5.3. CURRENT LOOP OPTION...............................................................................................................38
5.4. MULTIDROP, RS-232 OPTION .......................................................................................................39
5.5. ETHERNET INTERFACE OPTION .....................................................................................................39
5.6. DILUTION RATIO OPTION...............................................................................................................39
6. OPERATING INSTRUCTIONS ........................................................................41
6.1. OPERATING MODES .....................................................................................................................41
6.2. SAMPLE MODE.............................................................................................................................42
6.2.1. Warning Message Display..................................................................................................43
6.2.2. Test Functions ...................................................................................................................43
6.2.3. Calibration Functions .........................................................................................................46
6.3. SET-UP MODE .............................................................................................................................47
6.3.1. RNGE Menu ......................................................................................................................47
6.3.2. Automatic Calibration (AutoCal) .........................................................................................47
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6.3.3. Password Enable / Security Mode (PASS)..........................................................................47
6.3.4. Configuration Information (CFG).........................................................................................49
6.3.5. Time of Day Clock (CLK)....................................................................................................50
6.3.6. Communications Menu (COMM) ........................................................................................52
6.3.7. GFC7001E Internal Variables.............................................................................................52
6.4. ANALOG OUTPUTS – RANGE CONFIGURATION ................................................................................55
6.4.1. Physical Range vs. Measurement Range ...........................................................................55
6.4.2. A1 & A2 Measurement Range Modes.................................................................................57
6.4.3. A1 & A2 Single Range Mode..............................................................................................58
6.4.4. A1 & A2 Dual Range Mode ................................................................................................59
6.4.5. A1 & A2 Auto Range Mode ................................................................................................61
6.4.6. Setting the Measurement Range Unit Type ........................................................................62
6.4.7. TEST Channel Output........................................................................................................64
6.4.8. Using the Dilution Option....................................................................................................65
6.5. ANALOG OUTPUTS - ELECTRONIC CONFIGURATION ........................................................................66
6.5.1. Voltage Output Range Selection and Offset Adjustment .....................................................68
6.5.2. Current Loop Output Span and Offset Adjustment ..............................................................69
6.6. DIAGNOSTIC MODE (DIAG)...........................................................................................................72
6.6.1. Signal I/O Diagnostic Functions..........................................................................................74
6.6.2. Analog Output Step Test ....................................................................................................75
6.6.3. Analog I/O Configuration ....................................................................................................76
6.6.4. Electric Test.......................................................................................................................79
6.6.5. Dark Calibration Test .........................................................................................................80
6.6.6. Flow Calibration .................................................................................................................81
6.7. EXTERNAL DIGITAL I/O .................................................................................................................81
6.7.1. Status Outputs ...................................................................................................................81
6.7.2. Control Inputs ....................................................................................................................82
6.8. SERIAL INTERFACES .....................................................................................................................84
6.8.1. Serial I/O Default Settings ..................................................................................................84
6.8.2. Serial I/O Physical Connections .........................................................................................85
6.8.3. COM-B RS-232/485 Configuration .....................................................................................85
6.8.4. DTE versus DCE Communication.......................................................................................87
6.8.5. Setting the Serial I/O Communication Mode .......................................................................88
6.8.6. Setting the Serial I/O Baud Rate.........................................................................................90
6.8.7. Testing the Serial I/O .........................................................................................................91
6.9. OPERATING THE ANALYZER FROM A TERMINAL OR COMPUTER ........................................................92
6.9.1. Obtaining Help ...................................................................................................................93
6.9.2. Command Line Interface ....................................................................................................93
6.9.3. Data Types ........................................................................................................................94
6.9.4. Asynchronous Status Reporting .........................................................................................95
6.9.5. Connecting the Analyzer to a Modem .................................................................................96
6.9.6. Serial Port Password Security Feature ...............................................................................98
6.9.7. APIcom..............................................................................................................................99
6.10. THE INTERNAL DATA ACQUISITION SYSTEM (IDAS) .....................................................................100
6.10.1. When the iDAS Is Operating ..........................................................................................100
6.10.2. Disabling the iDAS.........................................................................................................101
6.10.3. iDAS Record Structure...................................................................................................101
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6.10.4. Default iDAS Channels ..................................................................................................104
6.10.5. Viewing Existing Data Channels.....................................................................................106
6.11. CONFIGURING THE IDAS...........................................................................................................107
6.11.1. Editing the List of Data Channels ...................................................................................107
6.11.2. Editing the Data Channel Name .....................................................................................108
6.11.3. Editing the Data Channel Trigger Event..........................................................................109
6.11.4. Adding or Deleting Data Parameters ..............................................................................110
6.11.5. Configuring the Data Parameter Functions.....................................................................112
6.11.6. Editing the Data Channel Report Period .........................................................................113
6.11.7. Selecting the Data Channel Number of Records.............................................................114
6.11.8. Turning the RS-232 Report Function On/Off...................................................................115
6.11.9. Disabling/Enabling the Data Channel .............................................................................116
6.11.10. Turning the HOLDOFF Feature On/Off.........................................................................117
6.11.11. Maximum Number of Channels, Parameters, and Records...........................................118
6.11.12. RS-232 Interface to the iDAS.......................................................................................118
7. CALIBRATION PROCEDURES.....................................................................120
7.1. BEFORE CALIBRATION ................................................................................................................120
7.1.1. Zero Air and Span Gas.....................................................................................................121
7.2. MANUAL CALIBRATION WITHOUT ZERO/SPAN VALVES ...................................................................122
7.3. MANUAL CALIBRATION WITH ZERO/SPAN VALVES .........................................................................125
7.3.1. Zero/Span Calibration on Auto Range or Dual Ranges .....................................................128
7.3.2. Use of Zero/Span Valves with Remote Contact Closure....................................................128
7.4. AUTOMATIC ZERO/SPAN CAL/CHECK (AUTOCAL)..........................................................................129
8. EPA PROTOCOL CALIBRATION ................................................................. 134
8.1.1. GFC7001E Calibration – General Guidelines....................................................................134
8.1.2. Calibration Equipment, Supplies, and Expendables ..........................................................135
8.1.3. Level 1 Calibrations versus Level 2 Checks......................................................................135
8.1.4. Performing EPA Calibrations and Checks.........................................................................137
8.1.5. Precision Check ...............................................................................................................138
8.1.6. Auditing Procedure...........................................................................................................138
8.1.7. Calibration Frequency ......................................................................................................139
8.1.8. Summary of Quality Assurance Checks............................................................................140
8.1.9. Dynamic Multipoint Calibration Procedure ........................................................................140
8.2. REFERENCES.............................................................................................................................142
9. MAINTENANCE SCHEDULE & PROCEDURES ..........................................143
9.1. MAINTENANCE SCHEDULE ..........................................................................................................143
9.2. PREDICTING FAILURES USING THE TEST FUNCTIONS.....................................................................147
9.3. MAINTENANCE PROCEDURES ......................................................................................................148
9.3.1. Replacing the Sample Particulate Filter ............................................................................148
9.3.2. Rebuilding the Sample Pump ...........................................................................................149
9.3.3. Performing Leak Checks ..................................................................................................149
9.3.4. Performing a Sample Flow Check ....................................................................................151
9.3.5. Flow Calibration ...............................................................................................................152
9.3.6. Cleaning the Optical Bench ..............................................................................................153
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9.3.7. Cleaning Exterior Surfaces of the GFC7001E...................................................................153
10. THEORY OF OPERATION ..........................................................................155
10.1. MEASUREMENT METHOD ..........................................................................................................156
10.1.1. Beer’s Law.....................................................................................................................156
10.1.2. Measurement Fundamentals..........................................................................................156
10.1.3. Gas Filter Correlation.....................................................................................................157
10.2. PNEUMATIC OPERATION ...........................................................................................................161
10.2.1. Sample Gas Flow ..........................................................................................................161
10.2.2. Critical Flow Orifice ........................................................................................................162
10.2.3. Sample Pressure Sensor ...............................................................................................162
10.2.4. Sample Flow Sensor......................................................................................................163
10.2.5. Particulate Filter.............................................................................................................163
10.2.6. Valve Options ................................................................................................................163
10.3. ELECTRONIC OPERATION..........................................................................................................165
10.3.1. Overview .......................................................................................................................165
10.3.2. CPU ..............................................................................................................................167
10.3.3. Optical Bench & GFC Wheel..........................................................................................167
10.3.4. Synchronous Demodulator (Sync/Demod) Assembly......................................................170
10.3.5. Relay Board...................................................................................................................174
10.3.6. Mother Board.................................................................................................................176
10.3.7. Power Supply/ Circuit Breaker........................................................................................179
10.4. INTERFACE ..............................................................................................................................180
10.5. SOFTWARE OPERATION ............................................................................................................183
10.5.1. Adaptive Filter................................................................................................................184
10.5.2. Calibration - Slope and Offset ........................................................................................185
10.5.3. Measurement Algorithm .................................................................................................185
10.5.4. Internal Data Acquisition System (iDAS).........................................................................186
11. TROUBLESHOOTING & REPAIR PROCEDURES .................................... 189
11.1. GENERAL TROUBLESHOOTING HINTS.........................................................................................189
11.1.1. Interpreting WARNING Messages..................................................................................190
11.1.2. Fault Diagnosis with TEST Functions .............................................................................193
11.1.3. Using the Diagnostic Signal I/O Function........................................................................195
11.1.4. Internal Electronic Status LED’s .....................................................................................197
11.2. GAS FLOW PROBLEMS..............................................................................................................201
11.2.1. Typical Flow Problems ...................................................................................................201
11.3. CALIBRATION PROBLEMS ..........................................................................................................203
11.3.1. Miss-Calibrated..............................................................................................................203
11.3.2. Non-Repeatable Zero and Span.....................................................................................204
11.3.3. Inability to Span – No SPAN Key....................................................................................204
11.3.4. Inability to Zero – No ZERO Key ....................................................................................205
11.4. OTHER PERFORMANCE PROBLEMS............................................................................................205
11.4.1. Temperature Problems ..................................................................................................205
11.4.2. Excessive Noise ............................................................................................................207
11.5. SUBSYSTEM CHECKOUT ...........................................................................................................208
11.5.1. AC Mains Configuration .................................................................................................208
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11.5.2. DC Power Supply ..........................................................................................................209
11.5.3. I2C Bus ..........................................................................................................................211
11.5.4. Keyboard/Display Interface ............................................................................................211
11.5.5. Relay Board...................................................................................................................211
11.5.6. Sensor Assembly...........................................................................................................212
11.5.7. Motherboard ..................................................................................................................215
11.5.8. CPU ..............................................................................................................................217
11.5.9. RS-232 Communications ...............................................................................................218
11.6. REPAIR PROCEDURES ..............................................................................................................219
11.6.1. Repairing Sample Flow Control Assembly......................................................................220
11.6.2. Removing/Replacing the GFC Wheel .............................................................................221
11.6.3. Disk-On-Chip Replacement Procedure...........................................................................224
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List of Appendices
APPENDIX A – Software Version-Specific Documentation
APPENDIX A-1 - Software Menu Trees and Index
APPENDIX A-2 - Setup Variables Available Via Serial I/O
APPENDIX A-3 - Warning Messages and Test Measurements Available Via Serial I/O
APPENDIX A-4 - Signal I/O Definitions
APPENDIX A-5 - iDAS Functions
APPENDIX A-6 – Terminal Command Designators
APPENDIX B – GFC7001E Spare Parts List
APPENDIX C – Test Functions and Repair Questionnaire for GFC7001E
APPENDIX D – ELECTRONIC SCHEMATICS, INTERCONNECTION
DRAWING AND INTERCONNECTION LIST
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List of Figures
Figure 3–1: Removal of Shipping Screws.................................................................... 11
Figure 3–2: Rear Panel Connectors............................................................................ 16
Figure 3–3: Basic Pneumatic Connections Flow Diagram .............................................. 18
Figure 3–4: Pneumatic Connections Flow Diagram w/ Valve Options ............................. 20
Figure 3–5: Example Pneumatic Connections Flow Diagram through Gas Dilution
Calibrator.............................................................................................. 21
Figure 3–6: Assembly Layout.................................................................................... 29
Figure 5–1: Pneumatic Diagram – Zero/Span/Shutoff Valves & Internal Zero ................. 34
Figure 5–2: Pneumatic Diagram – Zero/Span/Shutoff Valves & Internal Zero with Zero
Air Scrubber.......................................................................................... 35
Figure 5-3: Pneumatic Diagram – Zero/Span/ Valves & Internal Zero............................ 35
Figure 5-4: Pneumatic Diagram – Zero/Span/ Valves & Internal Zero with Zero Air
Scrubber............................................................................................... 36
Figure 5–5: Current Loop Option Installed.................................................................. 38
Figure 6–1: Front Panel Display ................................................................................ 41
Figure 6–2: Analog Output Pin Assignments ............................................................... 68
Figure 6–3: Setup for Checking Current Output Signal Levels....................................... 70
Figure 6–4: Status Output Connector......................................................................... 81
Figure 6–5: Control Inputs ....................................................................................... 83
Figure 6–6: Default iDAS Channels Setup..................................................................105
Figure 7-1: Pneumatic Connections for Manual Calibration w/o Z/S Valves....................122
Figure 7–2: Pneumatic connections for Manual Calibration With Z/S Valves ..................125
Figure 9–1: Replacing the Particulate Filter................................................................148
Figure 10-1: Measurement Fundamentals .................................................................157
Figure 10-2: GFC Wheel ..........................................................................................157
Figure 10-3: Measurement Fundamentals with GFC Wheel ..........................................158
Figure 10-4: Affect of CO in the Sample on CO MEAS & CO REF...................................159
Figure 10-5: Effects of Interfering Gas on CO MEAS & CO REF.....................................160
Figure 10-6: Chopped IR Signal ...............................................................................160
Figure 10-7: Model GFC7001E Pneumatic Operation ...................................................161
Figure 10-8: GFC7001E Electronic Block Diagram.......................................................165
Figure 10-9: GFC Light Mask....................................................................................169
Figure 10-10: Segment Sensor and M/R Sensor Output ..............................................169
Figure 10-11: GFC7001E Sync / Demod Block Diagram ..............................................171
Figure 10-12: Sample & Hold Timing ........................................................................172
Figure 10-13: Location of Relay Board Status LED’s ...................................................175
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Figure 10-14: Power Distribution Block Diagram ........................................................180
Figure 10-15: Interface Block Diagram .....................................................................181
Figure 10-16: Front Panel........................................................................................182
Figure 10-17: Basic Software Operation ....................................................................184
Figure 11-1: Viewing and Clearing Warning Messages ................................................191
Figure 11-2: Example of Signal I/O Function .............................................................196
Figure 11-3: CPU Status Indicator ............................................................................197
Figure 11-4: Sync/Demod Board Status LED Locations ...............................................198
Figure 11-5: Relay Board Status LEDs ......................................................................199
Figure 11-6: Critical Flow Restrictor Assembly Disassembly.........................................221
Figure 11-7: Removing the GFC Sensor Heater Cover.................................................222
Figure 11-8: Removing the Opto-Pickup Assembly .....................................................223
Figure 11-9: Removing the GFC Wheel Housing .........................................................223
Figure 11-10: Removing the GFC Wheel....................................................................224
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GFC7001E Rev A7
LIST OF TABLES
Table 2–1: Model GFC7001E Specifications................................................................... 5
Table 3–1: Inlet Outlet Nomenclature ........................................................................ 17
Table 5–1: Valve Option Operating States .................................................................. 37
Table 6–1: Mode Field of the Display ......................................................................... 42
Table 6–2: Test Functions Defined............................................................................. 45
Table 6–3: Password Levels...................................................................................... 48
Table 6–4: Variable Names (VARS)............................................................................ 52
Table 6–5: Test Functions available to the TEST Analog Output Channel........................ 65
Table 6–6: Analog Output Voltage Range Min/Max ....................................................... 67
Table 6–7: Analog Output Current Loop Min/Max ......................................................... 67
Table 6–8: Analog Output Pin Assignments ................................................................ 67
Table 6–9: Current loop Output Check ....................................................................... 72
Table 6–10: Diagnostic Mode (DIAG) Functions........................................................... 72
Table 6–11: DIAG – Analog I/O Functions .................................................................. 76
Table 6–12: Status Output Pin Assignments ............................................................... 82
Table 6–13: Control Input Pin Assignments ................................................................ 83
Table 6–14: COM-A and COM-B Default Pin Assignments ............................................. 87
Table 6–15: COMM Port Communication Modes........................................................... 88
Table 6–16: Basic Terminal Mode Software Commands................................................ 92
Table 6–17: Terminal Mode Help Commands .............................................................. 93
Table 6–18: Serial I/O Command Designations ........................................................... 93
Table 6–19: Serial Interface Documents ..........................Error! Bookmark not defined.
Table 6–20: iDAS Data Channel Properties ................................................................102
Table 6–21: iDAS Data Parameter Functions..............................................................103
Table 7-1: NIST – Standard Reference Materials (SRM) for Carbon Monoxide................121
Table 7–2: AUTOCAL Modes.....................................................................................129
Table 7–3: AutoCal Attribute Setup Parameters .........................................................129
Table 9–1: GFC7001E Maintenance Schedule.............................................................145
Table 9–2: GFC7001E Test Function Record...............................................................146
Table 9-3: Predictive uses for Test Functions .............................................................147
Table 10–1: Relay Board Status LED’s ......................................................................175
Table 10-2: Front Panel Status LED’s........................................................................183
Table 11-1 Warning Messages...................................................................................191
Table 11-2: Test Functions - Indicated Failures...........................................................194
Table 11-3: Sync/Demod Board Status Failure Indications ...........................................198
Table 11-4: DC Power Test Point and Wiring Color Codes............................................209
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Table 11-5: DC Power Supply Acceptable Levels ........................................................209
Table 11-6: Relay Board Control Devices...................................................................212
Table 11-7: Opto Pickup Board Nominal Output Frequencies .......................................213
Table 11-8: Analog Output Test Function - Nominal Values Voltage Outputs ..................215
Table 11-9: Analog Output Test Function - Nominal Values Current Outputs ..................216
Table 11-10: Status Outputs Check ..........................................................................217
Table A-1: GFC7001E Setup Variables, Revision E.3 ................................................. 10
Table A-2: GFC7001E Warning Messages, Revision E.3 ............................................. 19
Table A-3: GFC7001E Test Functions, Revision E.3................................................... 21
Table A-5: GFC7001E DAS Trigger Events, Revision E.3............................................ 25
Table A-6: GFC7001E iDAS Functions, Revision E.3 .................................................. 26
Table A-7: Terminal Command Designators, Revision E.3 ......................................... 27
Table A-8: Terminal Key Assignments, Revision E.3 ................................................. 28
Model GFC7001E Carbon Monoxide
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Instruction Manual
GFC7001E DOCUMENTATION
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1. GFC7001E DOCUMENTATION
TAI is pleased that you have purchased the Model GFC7001E Gas Filter Correlation
Carbon Monoxide Analyzer.
The documentation for this instrument is available in several different formats:
1. Printed format.
2. Electronic format on a CD-ROM.
The electronic manual is in Adobe Systems Inc. “Portable Document Format”.
The PDF reader software can be downloaded from the Internet at
www.adobe.com.
The electronic version of the manual has many advantages:
Keyword and phrase search feature.
Figures and Tables are linked so that clicking on the Figure number will
display the associated graphic.
A list of Chapters and Sections are displayed at the left of the text.
Entries in the Table of Contents are linked to the corresponding locations in
the manual.
Links embedded in the manual will take you to the corresponding location
on the Internet if the computer used for viewing is connected to the
Internet.
Ability to print sections (or all) of the manual.
3. Additional documentation for the Model GFC7001E Gas Filter Correlation
Carbon Monoxide Analyzer is available from TAI’s website at
http://www.teledyne-AI.com/manuals.
Ai.com Software Manual p/n 03945
RS-232 Manual p/n 01350
Multidrop Manual p/n 01842
GFC7001E DOCUMENTATION
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
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GFC7001E Rev A7
1.1. Using This Manual
This manual has the following data structures:
1.0 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 and List of Figures. In the electronic version of the manual, clicking on a
specific entry in one of these tables automatically moves the view to the desired
section.
2.0 Specifications and Warranty
This section contains a list of the analyzer’s performance specifications, a
description of the conditions and configuration under which EPA equivalency was
approved and TAI’s warranty statement.
3.0 Getting Started
A concise set of instructions for unpacking your analyzer, installing it and running it
for the first time.
4.0 FAQ
Answers to the most frequently asked questions about operating the analyzer.
5.0 Optional Hardware & Software
A description of the various options available that add functionality to your
analyzer.
6.0 Operation Instructions
This section includes step-by-step instructions for operating the analyzer and using
its various features and functions such as the Serial I/O Ports and the iDAS.
NOTE
The flowcharts appearing 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.
7.0 Calibration Procedures
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General information and step-by-step instructions for calibrating or checking the
calibration of your analyzer.
8.0 EPA Protocol Calibration
Specific information regarding calibration requirements for analyzers used in EPA
monitoring.
9.0 Maintenance
Descriptions and schedule for certain preventative maintenance procedure that
should be regularly performed on you instrument to keep it in peak operating
condition. This section also includes information on using the iDAS to record
diagnostic functions useful in predicting possible component failures BEFORE they
happen.
10.0 Theory of Operation
An in depth look at the various operating 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 learning how to identify the source of problems with
the instrument should they occur.
11.0 Troubleshooting Section:
This section includes pointers and instructions for diagnosing problems with the
instrument, such as excessive noise or drift. It also includes instructions on
performing certain simple repairs of the instrument’s major subsystems.
Appendices
In order to make them easier to access, certain often-referred-to sets of
information have been separated out of the manual and placed a series of
appendices at the end of this manual, including: Software Menu Trees; Warning
Messages; definitions of iDAS & Serial I/O Variables; Spare Parts Lists; Repair
Questionnaire; Interconnect List/Drawing and; Electronic Schematics.
NOTE
Throughout this manual words printed in capital letters and emboldened, such as SETUP or ENTR
represent messages as they appear on the analyzers front panel display.
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2. SPECIFICATIONS, AGENCY APPROVALS,
AND WARRANTY
2.1. Specifications
Table 2–1: Model GFC7001E Specifications
Ranges
User selectable to any full scale range from 0-1 ppm to
0-1000 ppm
Measurement Units
ppb, ppm, µg/m3, mg/m3 (user selectable)
Zero Noise
≤ 0.02 ppm RMS
(1)
Span Noise
< 0.5% of reading RMS over 5 ppm
(1) (3)
Lower Detectable Limit
< 0.04 ppm
(1)
Zero Drift (24 hours)
< 0.1 ppm
(2)
Zero Drift (7 days)
< 0.2 ppm
(2)
Span Drift (24 hours)
< 0.5% of reading
(2) (4)
Span Drift (7 days)
< 1% of reading
(2) (4)
Linearity
Better than 1% full scale
(5)
Precision
0.5% reading
(1) (5)
Lag Time
<10 sec
(1)
Rise/Fall Time
<60 sec to 95%
(1)
Sample Flow Rate
800 scc/min. ± 10%
Temperature Range
5 - 40°C operating, 10 - 40°C EPA Equivalency
Humidity Range
0-95% RH, Non-Condensing
Temp Coefficient
< 0.05 % per °C
Voltage Coefficient
< 0.05 % per V
Dimensions (HxWxD)
7" x 17" x 23.5" (178 mm x 432 mm x 597 mm)
Weight
50 lb (22.7 kg)
AC Power
100V 50/60 Hz (3.25A), 115 V 60 Hz (3.0A),
220 – 240 V 50/60 Hz (2.5A)
Environmental
Conditions
Installation Category (Over voltage Category) II Pollution Degree 2
Analog Outputs
Three (3) Outputs
Analog Output Ranges
100 mV, 1 V, 5 V, 10 V, 2-20 or 4-20 mA isolated current loop.
All Ranges with 5% Under/Over Range
Analog Output
Resolution
1 part in 4096 of selected full-scale voltage
Status Outputs
8 Status outputs from opto-isolators
Control Inputs
6 Control Inputs, 2 defined, 4 spare
Serial I/O
One (1) RS-232; One (1) RS-485 (2 connecters in parallel)
Baud Rate : 300 - 115200
Certifications
USEPA: Reference Method Number EQOA-0992-087
CE: EN61010-1:90 + A1:92 + A2:95, EN61326 - Class A
(1)
As defined by the USEPA
(2)
At constant temperature and voltage
(3)
Or 0.2 ppm, whichever is greater
(4)
Or 0.1 ppm, whichever is greater
Specifications, Agency Approvals, and
Warranty
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
6
GFC7001E Rev A7
(5)
Above 10 ppm range, otherwise 0.2 ppm for lower ranges
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Specifications, Agency Approvals, and
Warranty
GFC7001E Rev A7
7
2.2. EPA Equivalency Designation
Teledyne Analytical Instruments, Model GFC7001E Carbon monoxide Analyzer is
designated as Reference Method Number EQOA-0992-087 as defined in 40 CFR Part
53, when operated under the following conditions:
1. Range: Any range from 10 ppm to 50 ppm
2. Ambient temperature range of 10 to 40°C
3. Line voltage range of 90 – 127 and 200 – 230 VAC, 50/60 Hz
4. With 5-micron TFE filter element installed in the internal filter assembly
5. Sample flow of 800 ± 80 cc/min at sea level
6. Internal sample pump
7. Software settings:
Dilution factor
1.0
AutoCal
ON or OFF
Dynamic Zero
ON or OFF
Dynamic Span
OFF
Dual range
ON or OFF
Auto range
ON or OFF
Temp/Pres compensation
ON
Under the designation, the Analyzer may be operated with or without the following
options:
1. Rack mount with slides
2. Rack mount without slides, ears only
3. Option 52 Sample/Cal valves
4. Option 53 Sample/Cal valves with internal zero air
5. Option 50 Sample/Cal valves with span shutoff & flow control
6. Option 51 Sample/Cal valves with span shutoff & flow control & internal
zero air
7. 4-20mA, isolated output
Specifications, Agency Approvals, and
Warranty
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
8
GFC7001E Rev A7
2.3. Warranty
Warranty Policy (02024c)
Prior to shipment, TAI equipment is thoroughly inspected and tested. Should equipment
failure occur, TAI assures its customers that prompt service and support will be available.
Coverage
After the warranty period and throughout the equipment lifetime, TAI stands ready to
provide on-site or in-plant service at reasonable rates similar to those of other
manufacturers in the industry. All maintenance and the first level of field troubleshooting is
to be performed by the customer.
Non-TAI Manufactured Equipment
Equipment provided but not manufactured by TAI is warranted and will be repaired to the
extent and according to the current terms and conditions of the respective equipment
manufacturers warranty.
General
TAI warrants each Product manufactured by TAI to be free from defects in material and
workmanship under normal use and service for a period of one year from the date of
delivery. All replacement parts and repairs are warranted for 90 days after the purchase.
If a Product fails to conform to its specifications within the warranty period, TAI shall correct
such defect by, in TAI's discretion, repairing or replacing such defective Product or refunding
the purchase price of such Product.
The warranties set forth in this section shall be of no force or effect with respect to any
Product: (i) that has been altered or subjected to misuse, negligence or accident, or (ii) that
has been used in any manner other than in accordance with the instruction provided by TAI
or (iii) not properly maintained.
THE WARRANTIES SET FORTH IN THIS SECTION AND THE REMEDIES THEREFORE
ARE EXCLUSIVE AND IN LIEU OF ANY IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE OR OTHER WARRANTY
OF QUALITY, WHETHER EXPRESSED OR IMPLIED. THE REMEDIES SET FORTH IN
THIS SECTION ARE THE EXCLUSIVE REMEDIES FOR BREACH OF ANY WARRANTY
CONTAINED HEREIN. TAI SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR
CONSEQUENTIAL DAMAGES ARISING OUT OF OR RELATED TO THIS AGREEMENT
OF TAI'S PERFORMANCE HEREUNDER, WHETHER FOR BREACH OF WARRANTY OR
OTHERWISE.
Terms and Conditions
All units or components returned to TAI should be properly packed for handling and
returned freight prepaid to the nearest designated Service Center. After the repair, the
equipment will be returned, freight prepaid.
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Specifications, Agency Approvals, and
Warranty
GFC7001E Rev A7
9
INTENTIONALLY BLANK
Getting Started
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
10
GFC7001E Rev A7
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 GFC7001E.
1. Verify that there is no apparent external shipping damage. If damage has
occurred, please advise the shipper first, then TAI.
2. Included with your analyzer is a printed record of the final performance
characterization performed on your instrument at the factory. This record, P/N
04307, 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 rear panel.
Remove the four screws fastening the top cover to the unit (two per side).
Lift the cover straight up. Do not slide backwards.
NOTE
Some versions of the GFC7001E CO Analyzer may have a spring loaded fastener at the top
center of the rear panel and as many as eight screws (four per side) fastening the top cover to
the chassis.
NOTE
Static sensitive parts are present on PCA (Printed Circuit
Assemblies). Before touching PCAs, touch a bare metal part of
the chassis to discharge any electrostatic potentials or connect a
grounding strap to your wrist.
CAUTION
Never disconnect PCAs, wiring harnesses or electronic
subassemblies while under power.
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Getting Started
GFC7001E Rev A7
11
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.
7. Once you have determined that no shipping damage exists, and the unit
includes all expected hardware options, remove all red colored shipping screws
from the bottom of the chassis as shown in Figure 3-1.
Figure 3–1: Removal of Shipping Screws
NOTE
Save these shipping screws and re-install them whenever the unit is shipped to another location.
Shipping
Screws
Getting Started
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
12
GFC7001E Rev A7
8. 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
1 in.
Above and below the instrument
1 in.
Various rack mount kits are available for this analyzer. See Section 5.1 of
this manual for more information.
3.1.1. Electrical Connections
CAUTION
Check the voltage and frequency label on the rear panel of the
instrument (See Figure 3-2) for compatibility with the local power
before plugging the GFC7001E into line power.
CAUTION
Power connection MUST have functioning ground connection.
1. Refer to Figure 3-2 for the location of the rear panel electrical connections.
2. Attach a strip chart recorder and/or data-logger to the appropriate analog
output connections on the rear panel of the analyzer.
ANALOG
A1 A2 A3 A4
1 2 3 4 5 6 7 8
The A1 and A2 channels output a signal that is proportional to the CO
concentration of the Sample Gas. Either can be used for connecting the analog
output signal to a chart recorder or for interfacing with a datalogger.
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Getting Started
GFC7001E Rev A7
13
The third analog output, labeled A3 is special. It can be set by the user (see
Section 6.4.7) to output any one of the parameters accessible through the
<TST TST> keys of the units Sample Display.
The standard configuration for these outputs is mVDC. An optional Current
Loop output is available for each.
Pin-outs for the Analog Output connector at the rear panel of the instrument
are:
PIN
Analog Output
VDC Signal
mADC Signal
1
V Out
I Out +
2A1Ground
I Out -
3
V Out
I Out +
4A2Ground
I Out -
5
V Out
I Out +
6A3Ground
I Out -
7
V Out
Not Available
8
A4 (Spare)
Ground
Not Available
The default analog output voltage setting of the GFC7001E CO Analyzer is 0
– 5 VDC with a range of 0 – 50 ppm.
TO change these settings, see Sections 6.4 and 6.5
3. 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.
STATUS
1 2 3 4 5 6 7 8 D +
Getting Started
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
14
GFC7001E Rev A7
The pin assignments for the Status Outputs can be found in the table below:
Output #
Status
Definition
Condition
1
SYSTEM OK
On if no faults are present.
2
CONC VALID
On if CO concentration measurement is valid.
If the CO concentration measurement is invalid, this bit is OFF.
3
HIGH RANGE
On if unit is in high range of DUAL or AUTO Range Modes.
4
ZERO CAL
On whenever the instruments ZERO point is being calibrated.
5
SPAN CAL
On whenever the instruments SPAN point is being calibrated.
6
DIAG MODE
On whenever the instrument is in DIAGNOSTIC mode.
7
SPARE
8
SPARE
D
EMITER BUSS
The emitters of the transistors on pins 1-8 are bussed together.
+
DC POWER
+ 5 VDC
Digital Ground
The ground level from the analyzer’s internal DC Power Supplies.
NOTE
Most PLC’s have internal provisions for limiting the current that the input will draw from an
external device. When connecting to a unit that does not have this feature, an external
dropping resistor must be used to limit the current through the transistor output to less
than 50mA. At 50mA, the transistor will drop approximately 1.2V from its collector to
emitter.
4. If you wish to use the analyzer’s to remotely activate the Zero and Span
calibration modes, several digital Control Inputs are provided via a 10-pin
connector labeled CONTROL IN on the analyzer’s rear panel. Two methods
for energizing the inputs are provided below; the first using the internal +5V
available on the CONTROL IN connector and the second, if an external,
isolated supply is employed.
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Getting Started
GFC7001E Rev A7
15
CONTROL IN
A B C D E F U +
S
P
A
N
Z
E
R
O
CONTROL IN
A B C D E F U +
-
+
5 VDC Power
Supply
S
P
A
N
Z
E
R
O
Local Power Connections
External Power Connections
Input #
Status
Definition
On Condition
A
REMOTE ZERO
CAL
The Analyzer is placed in Zero Calibration mode. The mode
field of the display will read ZERO CAL R.
B
REMOTE
SPAN CAL
The Analyzer is placed in Span Calibration mode. The mode
field of the display will read SPAN CAL R.
C
SPARE
D
SPARE
E
SPARE
F
SPARE
Digital Ground
May be connected to the ground of the datalogger/recorder.
U
Pullup supply
for inputs
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 +5V
Supply
Internal source of +5V which can be used to actuate control
inputs when jumpered to the U pin.
5. If you wish to utilize either of the analyzer’s two serial interfaces, refer to
Section 6.8 of this manual for instructions on their configuration and usage.
Getting Started
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
16
GFC7001E Rev A7
3.1.2. Pneumatic Connections:
CAUTION
CARBON MONOXIDE (CO) IS A TOXIC GAS.
Obtain a Material Safety Data Sheet (MSDS) for this material. Read
and rigorously follow the safety guidelines described there.
Do not vent calibration gas and sample gas into enclosed areas.
1. Sample and calibration gases should only come into contact with PTFE
(Teflon), FEP, glass, stainless steel or brass.
IZS Inlet
Pressure Span Inlet
Vent Span Outlet
Status Outputs
Serial I/O LED’s
Control
Inputs
Exhaust Outlet
Sample Inlet
Cooling Fan
Power Receptacle
COM A Connector (
Figure 3–2: Rear Panel Connectors
CAUTION
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.
Make sure that all of these dust plugs are removed before attaching
exhaust and supply gas lines.
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Getting Started
GFC7001E Rev A7
17
Table 3–1: Inlet Outlet Nomenclature
Rear Panel Label
Function
Sample
Connect a gas line from the source of Sample Gas here.
Calibration gasses are also inlet here on units without
Zero/Span/Shutoff Valve Options installed.
Exhaust
Connect an exhaust gas line of not more than 10 meters long here.
Pressure Span
On Units with Zero/Span/Shutoff Valve Options installed, connect a
gas line to the source of Calibrated Span Gas here.
Vent Span
Span Gas vent outlet for units with Zero/Span/Shutoff Valve Options
installed.
Connect an exhaust gas line of not more than 10 meters long here.
IZS
Internal Zero air Scrubber.
On units with Zero/Span/Shutoff Valve Options installed but NO
internal Zero Air Scrubber attach a gas line to the source of Zero Air
here.
2. Attach a sample inlet line to the sample inlet port. Ideally, the pressure of the
sample gas should be at ambient pressure (0 psig).
The SAMPLE input line should not be more than 2 meters long.
Figure 3-3 depicts the pneumatic flow for this analyzer in its basic
configuration.
Figure 3-4 depicts the pneumatic flow for this analyzer with various
Zero/Span/Shutoff Valve Options attached.
CAUTION
Maximum pressure over ambient should not exceed 1.5 in-Hg.
3. The exhaust from the pump and vent lines should be vented to atmospheric
pressure using maximum of 10 meters of _” PTEF tubing. Venting should be
outside the shelter or immediate area surrounding the instrument.
CAUTION
Venting should be outside the shelter or immediate area surrounding
the instrument and conform to all safety requirements regarding
exposure to CO.
Getting Started
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
18
GFC7001E Rev A7
4. 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.
Figure 3–3: Basic Pneumatic Connections Flow Diagram
NOTE
The Inlet/Outlet labels appearing in the various pneumatic diagrams found in this
manual (such as Figure 3–3).
The order in which they appear in the illustrations IS NOT necessarily the same order
in which they are arranged on the rear panel of the instrument.
No Valve Options Installed
Sample
Exhaust
Pressure Span
Vent Span
IZS
MODEL 700
Gas Dilution
Calibrator
MODEL 701
Zero Air Generator
VENT
Calibrated
CO Gas
Source of
SAMPLE Gas
Removed
during
Calibr
ation
Sample
Exhaust
Pressure Span
Vent Span
IZS
MODEL 701
Zero Air Generator
VENT
Calibrated
CO Gas
Source of
SAMPLE Gas
Removed
during
Calibration
Valve
OR
Needle Valve to
control Flow
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Getting Started
GFC7001E Rev A7
19
CAUTION
Sample Gas pressure must equal ambient atmospheric pressure.
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
Vented outside the shelter or immediate area surrounding the
instrument
Sample
Exhaust
Pressure Span
Vent Span
IZS
VENT
Certified
CO Gas
Source of
SAMPLE Gas
VENT if input is pressurized
Option 51
Sample
Exhaust
Pressure Span
Vent Span
IZS
Source of
SAMPLE Gas
VENT
MODEL 701
Zero Air Generator
VENT
Certified
CO Gas
Source of
SAMPLE Gas
VENT if input is pressurized
Option 50
Needle Valve to
control Flow
Getting Started
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
20
GFC7001E Rev A7
Sample
Exhaust
Pressure Span
Vent Span
IZS
Certified
CO Gas
Source of
SAMPLE Gas
VENT if input is pressurized
Option 53
Sample
Exhaust
Pressure Span
Vent Span
IZS
MODEL 701
Zero Air Generator
Source of
SAMPLE Gas
Certified
CO Gas
Source of
SAMPLE Gas
VENT if input is pressurized
Option 52
Needle Valve to
control Flow
VENT
MODEL 700
Gas Dilution
Calibrator
MODEL 700
Gas Dilution
Calibrator
MODEL 701
Zero Air Generator
VENT
VENT
Figure 3–4: Pneumatic Connections Flow Diagram w/ Valve Options
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Getting Started
GFC7001E Rev A7
21
Some applications, such as EPA monitoring, 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 TAI Model 700. This type of calibrator precisely
mixes Span Gas and Zero Air to produce any concentration level between 0 ppm
and the concentration of the certified gas. This means that both the source of Zero
Air and Span Gas must be connected to the calibrator whose output is then
connected to the Pressure Span inlet on the Rear Panel of the instrument.
Figure 3-5 depicts the pneumatic set up in this sort of application of a Model
GFC7001E CO Analyzer with Zero/Span Valve Option 50 installed.
Gas Pressure should be
regulated at
30 – 35 PSIG
MODEL
300E
Sample
Exhaust
Pressure Span
Vent Span
IZS
VENT
Source of
SAMPLE Gas
VENT
MODEL 701
Zero Air Generator
Sample
Exhaust
Pressure Span
Vent Span
IZS
VENT
Certified
CO Gas
Source of
SAMPLE Gas
VENT if input is pressurized
Option 50
MODEL 700
Gas Dilution
Calibrator
Figure 3–5: Example Pneumatic Connections Flow Diagram through
Gas Dilution Calibrator
Getting Started
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
22
GFC7001E Rev A7
3.2. Initial Operation
If you are unfamiliar with the GFC7001E theory of operation, we recommend that
you read Section 10 before proceeding.
For information on navigating the analyzer’s software menus, see the menu trees
described in Appendix A.
CAUTION
The analyzer’s cover MUST be installed to ensure that the temperatures
of the GFC wheel and absorption cell assemblies are properly controlled.
3.2.1. Start Up
After electrical and pneumatic connections are made, turn on the instrument power.
The exhaust fan and pump should start. The display should immediately display a
single horizontal dash at the far, left of the display. This will last for
approximately 20 – 30 seconds as the microprocessor that is the heart of the
analyzer loads its basic operating system.
Once the CPU has completed this activity it will begin loading the analyzer firmware
and factory calibration data. During this process several progress messages,
similar to the following, will appear on the analyzer’s display.
The analyzer should automatically switch to SAMPLE mode after completing the
boot-up sequence and start monitoring CO gas. You should see the following
display.
The green SAMPLE LED on the front panel should be on, and the red FAULT LED
should be flashing, indicating a SYSTEM RESET fault. This is normal.
SAMPLE SYSTEM RESET CO = 00.00
<TST TST> CAL CLR SETUP
GFC7001E CO ANALYZER
BOOT PROGRESS [XXXXXX 60% _ _ _ _ _ _ _]
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Getting Started
GFC7001E Rev A7
23
Press the CLR key to clear the SYSTEM RESET warning. The display should look
like this:
NOTE: The word SAMPLE in the upper right corner of the display may flash on and
off for several minutes as the unit warms up. This is normal.
3.2.2. Warm Up
The GFC7001E requires about 30 minutes for all internal components to come up to
temperature before reliable CO measurements can be taken.
3.2.3. Warning Messages
Because internal temperatures and other conditions may be outside be specified
limits during the analyzers 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. The following table includes a brief description of the various warning
messages that may appear.
Message
Meaning
SYSTEM RESET
The computer has rebooted.
SOURCE
The IR source may be faulty.
SYNC
The instrument is not properly tracking the rotation of the Gas Filter
Correlation wheel.
BENCH TEMP
Optical bench temperature is outside the specified limits.
WHEEL TEMP
The Gas Filter Correlation wheel temperature is outside the specified
limits.
BOX TEMP
The temperature inside the GFC7001E chassis is outside the specified
limits.
SAMPLE TEMP
The temperature of the sample gas is outside the specified limits.
SAMPLE FLOW
The flow rate of the sample gas is outside the specified limits.
SAMPLE PRES
The pressure of the sample gas is outside the specified limits.
SAMPLE RANGE=50.0 PPM CO=00.00
<TST TST> CAL SETUP
Getting Started
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
24
GFC7001E Rev A7
To View and Clear the various warning messages press:
SAMPLE WHEEL TEMP WARNING CO = XX.XX
TEST
CAL MSG CLR SETUP
Make
SURE
warning
messages are
NOT
due to
LEGITIMATE PROBLEMS.
.
Press
CLR
to clear the
message currently being
Displayed.
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
SAMPLE
Mode
SAMPLE
RANGE=50.0 PPM
CO = XX.XX
< TST TST > CAL
MSG
CLR SETUP
SAMPLE
WHEEL TEMP WARNING
CO = XX.XX
TEST
CAL MSG
CLR
SETUP
TEST
deactivates Warning
Messages
MSG
activates Warning
Messages.
<TST TST
> keys replaced with
TEST
key
NOTE:
If the Warning Message
persists after several
attempts to clear it, the
message may be an
indication of a legitimate
problem and not an
artifact of the Warm-Up
period
3.2.4. Functional Check
After the unit has thoroughly warmed up verify that the software supporting any
hardware options with which the analyzer was shipped have been properly set up.
For information on navigating through the analyzer’s software menus, see the
menu trees described in Appendix A.
Check to make sure that the analyzer is functioning within prescribed operation
parameters. See Appendix A for a list of those parameters and their expected
value ranges as well as their meaning and utility as diagnostic tools.
To view the current values of these parameters press the following key sequence on
the analyzer’s front panel.
Remember until the unit has completed its warm up these parameters may not
have stabilized.
RANGE
STABIL
CO MEAS
CO REF
M/R RATIO
SAMPLE PRES
SAMPLE FLOW
SAMPLE TEMP
BENCH TEMP
WHEEL TEMP
BOX TEMP
PHT DRIVE
SLOPE
OFFSET
TIME
SAMPLE RANGE = 50.0 MGM CO =XX.XX
< TST TST >
CAL SETUP
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Getting Started
GFC7001E Rev A7
25
3.3. Initial Calibration Procedure
The next task is to calibrate the analyzer.
NOTE
If you are using the GFC7001E for EPA monitoring, only the calibration
method described in Section Error! Reference source not found.
should be used.
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.
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 measurements made with the TAPI Model GFC7001E Gas Filter
Correlation Carbon Monoxide Analyzer it is recommended that you use a gas
calibrated to have a CO content equaling 80% of the range of compositions being
measured.
EXAMPLE: If the application is to measure between 0 ppm and 50 ppm, an
appropriate Span Gas would be 40 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 a Dynamic
Dilution Calibrator such as the T-TAPI Model 700.
Zero Air is similar in chemical composition to the earths atmosphere but scrubbed
of all components that might affect the analyzers readings.
In the case of CO measurements this means CO, CO2 and Water Vapor. Zero Air
can be purchased in pressurized canisters or created using a Zero Air Generator
such as the TAPI Model 701.
While it is possible to perform this procedure with any range setting we recommend
that you perform this initial checkout using the 50 ppm range.
NOTE
The following procedure assumes that the instrument DOES NOT have any of
the available Zero/Span Valve Options installed.
See Section 5.2 for information regarding setting up of Z/S Valve options.
See Section 7 for instructions for calibrating instruments possessing Z/S Valve
Options.
Getting Started
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
26
GFC7001E Rev A7
6. Set the Analog Output Range of the GFC7001E
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS
RNGE
PASS CLK MORE EXIT
SETUP C.3 RANGE CONTROL MENU
MODE
SET UNIT
EXIT
SETUP C.3 RANGE MODE:
SNGL
SNGL
DUAL AUTO ENTR
EXIT
SETUP C.3 RANGE: 50.0 Conc
0 0 0
5 0 .0
ENTR EXIT
SETUP C.3 CONC UNITS :
PPM
PPB
PPM
UGM MGM ENTR
EXIT
Press
EXIT
2x’s to Return to
the Main
SAMPLE
Display
To change the value of the
Range Setting, enter the
number sequence by pressing
the key under each digit until
the expected value is set.
SETUP C.3 RANGE:
50.0 Conc
0 0 0 5 0 .0
ENTR
EXIT
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Getting Started
GFC7001E Rev A7
27
7. Set the expected CO span gas concentration
SAMPLE RANGE = 50.0 PPM CO =
< TST TST >
CAL
SETUP
M-P CAL RANGE = 50.0 PPM CO =
< TST TST > ZERO
CONC
EXIT
M-P CAL CO SPAN CONC:
40.0 Conc
0 0 0
4 0 .0
ENTR EXIT
EXIT
2x’s to Return to the
Main
SAMPLE
Display
ENTR
stores the expected
CO span concentration value.
This sequence causes the
M300E to prompt for the
expected CO span
concentration.
The CO span concentration value
automatically defaults to
40.0 Conc
.
Make sure that you input the
ACTUAL
concentration value of the SPAN Gas.
To change this value to meet the actual
concentration of the SPAN Gas, enter the
number sequence by pressing the key under
each digit until the expected value is set.
NOTE
For this Initial Calibration it is important to independently verify the PRECISE CO 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.
Getting Started
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8. Perform the Zero/Span Calibration Procedure
SAMPLE RANGE = 50.0 PPM CO =
< TST TST >
CAL
SETUP
M-P CAL RANGE = 50.0 PPM CO =
< TST TST >
ZERO
CONC EXIT
EXIT
to Return to the Main
SAMPLE
Display
M-P CAL RANGE = 50.0 PPM CO =
< TST TST >
ENTR
CONC EXIT
WAIT 10
MINUTES
Or until the
reading
stabilizes and
the
SPAN
button
is displayed
ACTION:
Allow Zero Gas to enter
the sample port on the
rear of the instrument.
ACTION:
Switch gas streams to
span gas.
M-P CAL RANGE = 50.0 PPM CO =
< TST TST >
SPAN
CONC
M-P CAL RANGE = 50.0 PPM CO =
< TST TST >
ENTR
CONC EXIT
M-P CAL RANGE = 50.0 PPM CO =
< TST TST > ENTR CONC
EXIT
This operation changes
the calculation
equations and zeroes
the instrument
WAIT 10
MINUTES
Or until the
reading
stabilizes and
the
ZERO
button
is displayed
This operation changes the
calculation equations and sets the
Span of the instrument
NOTE:
In certain instances where low
Span gas concentrations are
present (= 10 ppm),
both the
Zero & SPAN
buttons
may appear simultaneously
If either the
ZERO
or
SPAN
buttons fail to
appear see Section 9 for
troubleshooting tips.
9. The Model GFC7001E Analyzer is now ready for operation
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Getting Started
GFC7001E Rev A7
29
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 TAI.
This information is vital to our efforts in continuously improving our service and
our products.
THANK YOU.
Figure 3–6: Assembly Layout
Getting Started
Model GFC7001E Carbon Monoxide
Analyzer
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Frequently Asked Questions
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4. FREQUENTLY ASKED QUESTIONS
The following is a list from the TAI Customer Service Department of the most
commonly asked questions relating to the Model GFC7001E CO Analyzer.
1. How do I get the instrument to zero / Why is the zero key not displayed?
See Section 11.3.4 Inability to zero.
2. How do I get the instrument to span / Why is the span key not displayed?
See Section 11.3.3 Inability to span.
3. Why does the ENTR key sometimes disappear on the Front Panel Display?
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 an iDAS Holdoff period of more than 20 minutes).
Once you adjust the setting in question to an allowable value, the ENTR key
will re-appear.
4. Is there an optional midpoint calibration?
There is an optional mid point linearity adjustment, however, midpoint
adjustment is applicable only to applications where CO measurements are
expected above 100 ppm. Call TAI’s Service Department for more information
on this topic.
5. How do I make the display and datalogger analog input agree?
This most commonly occurs when an independent metering device is used
besides the datalogger/recorded to determine gas concentration levels while
calibrating the analyzer. These disagreements result from the analyzer, the
metering device and the datalogger having slightly different ground levels.
If the only difference is a DC offset then it is possible to enter a compensating
value in the analog outputs. This procedure is described in Section 6.5.1 of
this manual.
Alternately, use the datalogger itself as the metering device during calibrations
procedures.
Frequently Asked Questions
Model GFC7001E Carbon Monoxide
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6. How do I perform a leak check?
See Section 9.3.3.
7. How do I measure the sample flow?
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 cc/min ±10%. See Section 9.3.4.
8. How long does the IR source last?
Typical lifetime is about 2-3 years.
9. Where is the sintered filter/sample flow control orifice?
These components are located inside the Flow Control Assembly that is
attached to the inlet side of the sample pump, see Figure 3-6. See Section
11.6.1 for instructions on disassembly and replacement.
10. How do I set up a SEQUENCE to run a nightly calibration check?
The setup of this option is located in Section 7.4.
11. How do I set the analog output signal range and offset?
Instructions for this can be found in Section 6.5.
12. What is the averaging time for an GFC7001E?
The default averaging time, optimized for ambient pollution monitoring, is 150
seconds for stable concentrations and 10 seconds for rapidly changing
concentrations; see Section 10.5.1 for more information. However, it is
adjustable over a range of 0.5 second to 200 seconds (please contact
customer service for more information).
Model GFC7001E Carbon Monoxide
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Instruction Manual
Optional Hardware and Software
GFC7001E Rev A7
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5. OPTIONAL HARDWARE AND SOFTWARE
This section includes a brief description of the hardware and software options
available for the Model GFC7001E Gas Filter Correlation Carbon Monoxide Analyzer.
For assistance with ordering these options please contact the Sales department of
Teledyne – Advanced Pollution Instruments at:
TEL:
626-961-9221
FAX:
626-961-2538
TEL:
626-934-1500
E-MAIL:
aisales@teledyne.com
WEB SITE:
www.teledyne-AI.com
5.1. Rack Mount Option
There are several options available for rack mounting the Analyzer.
Option Number
Description
OPT 20A
Rack mount with Chassis Slides 26 in.
OPT 20B
Rack mount with Chassis Slides 24 in. STD
OPT 21
Rack mount WITHOUT Chassis Slides.
Each of these options, permits the Analyzer to be mounted in a standard 19" wide x
30" deep RETMA rack.
5.2. Zero/Span/Shutoff Valve Options
There are four available options involving Zero/Span/Shutoff 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.
The user can control the valves comprising these options from the front panel
keyboard either manually or by activating the instruments AutoCal feature See
Section 7.4).
The valves may also be opened and closed remotely via the RS-232/485 Serial I/O
ports (see Section 6.9) or External Digital I/O Control Inputs (See Section 6.7.2).
Optional Hardware and Software
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Instruction Manual
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5.2.1. Zero/Span/Shutoff Valve Option
50
Filter
Pump
Sample
Chamber
Sample
Exhaust
Pressure Span
Vent Span
IZS
Zero/Span Valve
Sample/Cal Valves
Option 50
Shut Off Valve
Orifice
Vent here if Input is Pressurized
Figure 5–1: Pneumatic Diagram – Zero/Span/Shutoff Valves & Internal Zero
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 gas. A 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 Module such as a TAI 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 minimum SPAN Gas flow rate required for this option is 800 cc/min. The US
EPA recommends that the flow rate be at least 1600 cc/min. Regulating the
pressure of the gas bottle at 30 psig should produce the appropriate amount of
flow.
Table 5–1 lists the Open/Closed state of each valve during the analyzers various
operational modes.
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Optional Hardware and Software
GFC7001E Rev A7
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5.2.2. Zero/Span Valve Option 51
Filter
Pump
Sample
Chamber
Sample
Exhaust
Pressure Span
Vent Span
IZS
Zero/Span Valve
Zero Air Scrubber
Sample/Cal Valve
Option 51
Shut Off Valve
Orifice
Vent here if Input is Pressurized
Figure 5–2: Pneumatic Diagram – Zero/Span/Shutoff Valves & Internal Zero
with Zero Air Scrubber
In Option 51 nearly identical to Option 50 above, except that the Zero Air is
generated by an internal Zero Air Scrubber. This means that the IZS inlet can
simply be left open to ambient air.
Like Option 50, Option 51 requires an external gas line greater than 2 meters but
less than 10 meters in length be attached to the Span Vent outlet on the Rear Panel
of the instrument. Span gas must to be supplied at a minimum of 800 cc/min,
preferably 1600 cc/min.
Table 5–1 lists the Open/Closed state of each valve during the analyzers various
operational modes.
5.2.3. Zero/Span Valve Option 52
Filter
Pump
Sample
Chamber
Sample
Exhaust
Pressure Span
Vent Span
IZS
Vent as shown if Inputs are Pressurized
Zero/Span Valve
Sample/Cal Valve
Option 52
Figure 5-3: Pneumatic Diagram – Zero/Span/ Valves & Internal Zero
Optional Hardware and Software
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
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GFC7001E Rev A7
This Valve Option is intended for applications where Zero Air is supplied by a Zero
Air Generator like the TAI Model 701 and Span Gas are being supplied by Gas
Dilution Calibrator Like the TAI Model 700 or 702. Internal Zero/Span and
Sample/Cal valves control the flow of gas through the instrument, but no shutoff
valve is required.
An external gas line greater than 2 meters but less than 10 meters in length is
required to be attached to the Span Vent outlet on the Rear Panel of the
instrument.
This Option requires that both Zero Air and Span gas be supplied at a minimum of
800 cc/min, preferably 1600 cc/min.
Table 5–1 lists the Open/Closed state of each valve during the analyzers various
operational modes.
5.2.4. Zero/Span Valve Option 53
Option 53 is a variant of Option 52 with the addition of an internal Zero Air
Scrubber.
Filter
Pump
Sample
Chamber
Sample
Exhaust
Pressure Span
Vent Span
IZS
Vent as shown if Inputs are Pressurized
Zero/Span Valve
Zero Air Scrubber
Sample/Cal Valve
Option 53
Figure 5-4: Pneumatic Diagram – Zero/Span/ Valves & Internal Zero
with Zero Air Scrubber
An external gas line greater than 2 meters but less than 10 meters in length is
required to be attached to the Span Vent outlet on the Rear Panel of the
instrument.
Span gas should be supplied at a minimum of 800 cc/min, preferably 1600 cc/min,
but the IZS inlet can simply be left open to ambient air.
Table 5–1 lists the Open/Closed state of each valve during the analyzers various
operational modes.
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Optional Hardware and Software
GFC7001E Rev A7
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Table 5–1: Valve Option Operating States
OPTION
MODE
VALVE
CONDITION
Sample/Cal
Open to SAMPLE inlet
Zero/Span
Open to IZS inlet
SAMPLE
Shutoff
Closed
Sample/Cal
Open to ZERO/SPAN Valve
Zero/Span
Open to IZS inlet
ZERO CAL
Shutoff
Closed
Sample/Cal
Open to ZERO/SPAN Valve
Zero/Span
Open to SHUTOFF Valve
50
SPAN CAL
Shutoff
Open to PRESSURE SPAN Inlet
Sample/Cal
Open to SAMPLE inlet
Zero/Span
Open to ZERO AIR SCRUBBER
SAMPLE
Shutoff
Closed
Sample/Cal
Open to ZERO/SPAN Valve
Zero/Span
Open to ZERO AIR SCRUBBER
ZERO CAL
Shutoff
Closed
Sample/Cal
Open to ZERO/SPAN Valve
Zero/Span
Open to SHUTOFF Valve
51
SPAN CAL
Shutoff
Open to PRESSURE SPAN Inlet
Sample/Cal
Open to SAMPLE inlet
SAMPLE
Zero/Span
Open to IZS inlet
Sample/Cal
Open to ZERO/SPAN Valve
ZERO CAL
Zero/Span
Open to IZS inlet
Sample/Cal
Open to ZERO/SPAN Valve
52
SPAN CAL
Zero/Span
Open to PRESSURE SPAN inlet
Sample/Cal
Open to SAMPLE inlet
SAMPLE
Zero/Span
Open to ZERO AIR SCRUBBER
Sample/Cal
Open to ZERO/SPAN Valve
ZERO CAL
Zero/Span
Open to ZERO AIR SCRUBBER
Sample/Cal
Open to ZERO/SPAN Valve
53
SPAN CAL
Zero/Span
Open to PRESSURE SPAN inlet
Optional Hardware and Software
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
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GFC7001E Rev A7
5.3. Current Loop Option
This option adds isolated, voltage-to-current conversion circuitry to the analyzers
Analog Outputs enabling them to produce current loop signals. This option may be
ordered separately for each Analog Output. It can be installed at the factory or
added later. Call the factory for price and availability.
The Current Loop Option can be configured for any output range between 0 and
20 mADC. Most current loop applications require either 2-20 mA or 4-20 mA
spans. Information on calibrating or adjusting these outputs can be found in
Section 6.5.2.
Current Loop Option
Installed on REC
Figure 5–5: Current Loop Option Installed
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Optional Hardware and Software
GFC7001E Rev A7
39
5.4. Multidrop, RS-232 Option
The Multidrop Option is used with the serial port to enable communications with
several instruments over a single RS-232 cable. Additional hardware is required
(available from the Factory) allowing multiple instruments to be connected to a
single Serial I/O port. Similar operation can be achieved by using the COM2 port
configured for RS-485.
The setup and instructions for use of this mode is covered in the Multidrop Manual
P/N 018420000.
5.5. Ethernet Interface Option
An optional 10BaseT Ethernet interface is available, contact TAI sales for price and
availability that permits the GFC7001E to be connected to a local area network
running TCP/IP. This allows a user to control and download data from an
GFC7001E over either an intranet or the public Internet using AI.com or certain
other specialized software products.
The setup and instructions for using this option are provided as a separate
document.
5.6. 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 GFC7001E.
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 analyzers CO concentration calculation so that the
Measurement Range and concentration values 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 Ration Option can be found in Section 6.4.8.
Optional Hardware and Software
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
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Operating Instructions
GFC7001E Rev A7
41
6. OPERATING INSTRUCTIONS
To assist in navigating the analyzer’s software, a series of Menu Trees can be found
in Appendix A of this manual.
6.1. Operating Modes
The GFC7001E 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 concentration is displayed on the front panel and output as an analog
voltage from rear panel terminals, calibrations can be performed, and TEST and
WARNING functions can be examined.
The second most important operating mode is SETUP mode. This mode is used for
performing certain configuration operations, such as for the iDAS system, the
Analog Output ranges, or the serial (RS-232/RS-485/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. Besides SAMPLE and SETUP, other modes the
analyzer can be operated in are:
NOTE
The following flowcharts 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.
POWER
FAULT
CAL
SAMPLE
GAS FILTER CORRELATION ANALYZER - MODEL GFC7001
SAMPLE A
RANGE = 50 PPM
CO = 40.0
<TST
TST>
CAL
CALZ
CALS
SETUP
MODE FIELD
KEY DEFINITIONS
MESSAGE FIELD
CONCENTRATION FIELD
Operating Instructions
Model GFC7001E Carbon Monoxide
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Instruction Manual
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GFC7001E Rev A7
Table 6–1: Mode Field of the Display
Mode
Meaning
SAMPLE
Sampling normally, flashing indicates adaptive filter is on.
SAMPLE A
Indicates that unit is in SAMPLE Mode and AUTOCAL feature is activated.
ZERO CAL M
Unit is performing ZERO Cal procedure initiated manually by the user.
ZERO CAL A
Unit is performing ZERO Cal procedure initiated automatically by the analyzer’s
AUTOCAL feature.
ZERO CAL R
Unit is performing ZERO Cal procedure initiated remotely via the RS-232, RS-4485
or Digital I/O Control Inputs.
SPAN CAL M
Unit is performing SPAN Cal procedure initiated manually by the user.
SPAN CAL A
Unit is performing SPAN Cal procedure initiated automatically by the analyzer’s
AUTOCAL feature.
SPAN CAL R
Unit is performing SPAN Cal procedure initiated remotely via the RS-232, RS-4485
or Digital I/O Control Inputs.
M-P CAL
This is the basic Calibration Mode of the instrument and is activated by pressing
the CAL key.
SETUP
1
SETUP mode is being used to configure the analyzer (CO sampling will continue
during this process).
DIAG
One of the analyzer’s Diagnostic Modes is being utilized (see Section 6.6).
1
The revision of the TAI Software installed in this analyzer will be displayed following the word
SETUP. E.g. “SETUP C.4”
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 concentration and
reporting this information to the user via the Front Panel Display, the Analog
outputs and, if set up properly, the RS-232/485/Ethernet ports.
NOTE
A value of “XXXX” displayed in the CO Concentration field means that the M/R ratio is
invalid because CO REF is either too high(> 4950 mVDC) or too low (< 1250 VDC).
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
43
6.2.1. Warning Message Display
The most common and serious instrument failures will activate Warning Messages
that are displayed on the analyzer’s Front Panel. These are:
Message
Meaning
SYSTEM RESET
The computer has rebooted.
SOURCE
The IR source may be faulty.
SYNC
The instrument is not properly tracking the rotation of the Gas Filter
Correlation wheel.
BENCH TEMP
Optical bench temperature is outside the specified limits.
WHEEL TEMP
The Gas Filter Correlation wheel temperature is outside the specified
limits.
BOX TEMP
The temperature inside the GFC7001E chassis is outside the specified
limits.
SAMPLE TEMP
The temperature of the sample gas is outside the specified limits.
SAMPLE FLOW
The flow rate of the sample gas is outside the specified limits.
SAMPLE PRES
The pressure of the sample gas is outside the specified limits.
See Section 11.1.1 for more information on using these messages to troubleshoot
problems.
To View and Clear the various warning messages press:
SAMPLE WHEEL TEMP WARNING CO = XX.XX
TEST
CAL MSG CLR SETUP
Make
SURE
warning
messages are
NOT
due to
LEGITIMATE PROBLEMS.
.
Press
CLR
to clear the
message currently being
Displayed.
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
SAMPLE
Mode
SAMPLE
RANGE=50.0 PPM
CO = XX.XX
< TST TST > CAL
MSG
CLR SETUP
SAMPLE
WHEEL TEMP WARNING
CO = XX.XX
TEST
CAL MSG
CLR
SETUP
TEST
deactivates Warning
Messages
MSG
activates Warning
Messages.
<TST TST
> keys replaced with
TEST
key
6.2.2. Test Functions
A series of Test Functions are available for viewing via the Front Panel display while
the analyzer is in SAMPLE mode. These functions provide valuable information
Operating Instructions
Model GFC7001E Carbon Monoxide
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44
GFC7001E Rev A7
regarding the present operation and status of the instrument. These parameters
are also useful during troubleshooting exercises (see Section 11.1.2).
Model GFC7001E Carbon Monoxide
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Operating Instructions
GFC7001E Rev A7
45
Table 6–2: Test Functions Defined
Parameter
Display
Title
Units
Meaning
Range
RANGE
PPB, PPM,
UGM, MGM
The Full Scale limit at which the output range of the
analyzer’s ANALOG OUTPUTS are currently set.
THIS IS NOT the Physical Range of the instrument. See
Section 6.4 for more information.
Stability
STABIL
PPB, PPM
UGM, MGM
Standard deviation of CO Concentration readings. Data
points are recorded every ten second. The calculation
uses the last 25 data points.
CO Measure
CO MEAS
MV
The demodulated, peak IR Detector output during the
MEASURE portion of the CFG Wheel cycle.
CO Reference
CO REF
MV
The demodulated, peak IR Detector output during the
REFERENCE portion of the CFG Wheel cycle.
Measurement /
Reference Ratio
M/R
Ratio
-
The result of CO MEAS divided by CO REF. This ratio is the
primary value used to compute CO concentration. The
value displayed is not linearized.
Sample Pressure
SAMPLE
PRES
In-Hg-A
The absolute pressure of the Sample Gas as measured by
a solid state pressure sensor located inside the Sample
Chamber.
Sample Flow
SAMPLE
FLOW
cc/min
Sample mass flow rate. This is computed from the
differential between the pressures measured up-stream
and down-stream of the Sample Critical Flow Orifice
pressures.
Sample Temperature
SAMPLE
TEMP
°C
The Temperature of the gas inside the Sample Chamber.
Bench Temperature
BENCH
TEMP
°C
Optical Bench Temperature.
Wheel Temperature
WHEEL
TEMP
°C
Filter wheel temperature.
Box Temperature
BOX
TEMP
°C
The temperature inside the analyzer chassis.
Photo-detector
Temp. Control
Voltage
PHT
DRIVE
mV
The drive voltage being supplied to the thermoelectric
coolers of the IR Photo-Detector by the Sync/Demod
Board.
Slope
SLOPE
-
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.
Offset
OFFSET
-
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.
Test channel output
signal
TEST
mV, mA
Displays the signal level of the TEST Analog Output
Channel. Only Appears when the TEST channel has been
activated.
Current Time
TIME
-
The current time. This is used to create a time stamp on
iDAS readings, and by the AutoCal feature to trigger
calibration events.
Operating Instructions
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To view the TEST Functions press the following Key sequence:
RANGE
STABIL
CO MEAS
CO REF
M/R Ratio
SAMPLE PRES
SAMPLE FLOW
SAMPLE TEMP
BENCH TEMP
WHEEL TEMP
BOX TEMP
PHT DRIVE
SLOPE
OFFSET
[TEST]
TIME
SAMPLE RANGE = 50.0 MGM CO =XX.XX
< TST TST >
CAL SETUP
Only appears if the
TEST Analog Output
channel has been
activated. See
Section 6.4.7
NOTE
A value of “XXXX” displayed for any of these TEST functions indicates an OUT OF RANGE reading.
NOTE
Sample Pressure are represented in terms of ABSOLUTE pressure because this is the least
ambiguous method reporting gas pressure.
Absolute atmospheric pressure is about 29.92 in-Hg-A at sea level. It decreases about 1 in-Hg per
1000 ft gain in altitude. A variety of factors such as air conditioning systems, passing storms, and
air temperature, can also cause changes in the absolute atmospheric pressure.
6.2.3. Calibration Functions
Pressing the CAL key, switches the GFC7001E into calibration mode. In this mode
the user can with the use of calibrated zero, or span gases calibrate the Zero and
Full Span points of the analyzer’s measurement range.
Model GFC7001E Carbon Monoxide
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Operating Instructions
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If the instrument includes one of the available Zero/Span Valve options the Sample
Mode display will also include CALZ and CALS keys. Pressing either of these keys
also put the instrument into Cal Mode. The CALZ key is used to initiate a
calibration of the analyzer’s Zero Point. The CALS key is used to calibrate the Span
point of the analyzer’s current measurement range. It is recommended that this
Span calibration be performed at 80% of full scale of the analyzer’s Measurement
Range.
For more information about setting up and performing these calibration operations,
see Section 7.
For more information concerning the Zero/Span Valve Options, see Section 5.
6.3. Set-Up Mode
The SETUP Mode contains a variety of procedures and task that are used to
configure the analyzer’s various hardware and software features, and to read data
from the internal data acquisition system (iDAS).
NOTE
Any changes made to a variable during one of the following procedures is not
acknowledged by the instrument until the ENTR Key is pressed
If the EXIT key is pressed before the ENTR key, the analyzer will beep alerting the user
that the newly entered value has been lost.
6.3.1. RNGE Menu
This menu contains instructions for configuring the analyzer’s Analog Output data
channels. For detailed information about this topic see Sections 6.4 and 6.5 of this
manual.
6.3.2. Automatic Calibration (AutoCal)
The AutoCal feature allows the GFC7001E to automatically operate any of the
Zero/Span Valve options. Information on setting up AutoCal is in Section 7.4.
6.3.3. Password Enable / Security Mode
(PASS)
The GFC7001E provides password protection of the calibration and setup functions
to prevent incorrect adjustments. When the passwords have been enabled, the
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
48
GFC7001E Rev A7
system will prompt the user anytime a function is requested requiring password
access.
There are three levels of password protection, which correspond to operator,
maintenance, and configuration functions. Each level allows access to the all of the
previous levels functions.
Table 6–3: Password Levels
Password
Level
Menu Access Allowed
No password
Operator
TEST, MSG, CLR
101
Maintenance
CALZ, CALS, CAL
818
Configuration
SETUP, SETUP-VARS,
SETUP-DIAG
To enable the various password levels press the following keystroke sequence(s):
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS RNGE
PASS
CLK MORE EXIT
SETUP C.3 PASSWORD ENABLE:
OFF
OFF
ENTR EXIT
SETUP C.3 PASSWORD ENABLE:
ON
ON
ENTR EXIT
SETUP C.3 PASSWORD ENABLE: ON
ON
ENTR
EXIT
Exit Returns to
SETUP
Menu
Disable
or Enable
Password
To disable
PASSWORD
Follow Steps 1-5
Exit Returns to
SAMPLE
Dsiplay
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
49
Example: If all passwords are enabled, the following keypad sequence would be
required to enter the SETUP menu:
SAMPLE RANGE = 50.0 PPM CO =XX.XX
< TST TST > CAL SETUP
SAMPLE ENTER SETUP PASS: 0
0 0 0 ENTR EXIT
PROMPTS
PASSWORD
Number
Example: this
Password Enables the
Setup mode
SAMPLE ENTER SETUP PASS: 0
8 1 8 ENTR EXIT
SETUP C.3
CFG DAS RNGE PASS CLK MORE EXIT
Press individual
keys to set
Numbers
6.3.4. Configuration Information (CFG)
CFG key allows the user to review certain software configuration information. This
feature is useful for showing any special features that are present in the currently
installed Disk-on-Chip. It can be displayed by entering the key sequence:
Press NEXT of PREV to move back and
forth through the following list of
Configuration information:
SERIAL NUMBER
SOFTWARE REVISION
LIBRARY REVISION
CPU TYPE
SAMPLE RANGE = 50.0 MGM CO =XX.XX
< TST TST > CAL SETUP
SAMPLE RANGE = 50.0 MGM CO =XX.XX
CFG DAS RNGE PASS CLK MORE EXIT
SAMPLE GFC7001E CO ANALYZER CO
=XX.XX
Press Exit at
Any Time to
Return to
SETUP Menu
Press Exit at Any
Time to Return
to Main SAMPLE
Display
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
50
GFC7001E Rev A7
6.3.5. Time of Day Clock (CLK)
The GFC7001E has a time of day clock that supports the AutoCal timer, time of day
TEST function, and time stamps on most COM port messages. To set the time-ofday, press:
SETUP C.3
CFG DAS RNGE PASS
CLK
MORE EXIT
SETUP C.3
TIME-OF-DAY CLOCK
TIME DATE
EXIT
SETUP C.3
CFG DAS RNGE PASS CLK MORE
EXIT
Exit to Return
to the
Sample Menu
Enter Current
Date-of-Year
SETUP C.3
DATE: 01-JAN-02
0 1 JAN 0 2
ENTR EXIT
SETUP C.3 DATE:
01-JAN-02
0 1 JAN 0 2
ENTR
EXIT
SETUP C.3 TIME-OF-DAY CLOCK
TIME DATE
EXIT
Enter Current
Time-of-Day
SETUP C.3 TIME:
12:00
1 2 : 0 0
ENTR
EXIT
SETUP C.3
TIME: 12:00
1 2 : 0 0
ENTR EXIT
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
51
In order to compensate for CPU clocks which run fast or slow, there is a variable to
speed up or slow down the clock by a fixed amount every day. To change this
variable, press:
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS RNGE PASS CLK
MORE
EXIT
SETUP C.3
COMM
VARS
DIAG HALT EXIT
Exit Returns to
main Sample
Display
SETUP C.3 0 ) DAS_HOLD_OFF=15.0 Minutes
NEXT
JUMP
EDIT PRNT EXIT
Enter Number
of Seconds per
day the clock
gains or loses.
SETUP C.3 1 ) DYN_ZERO=OFF
PREV
NEXT
JUMP
EDIT PRNT EXIT
SETUP C.3
3 ) CLOCK_ADJ=0 Sec/Day
PREV JUMP
EDIT
PRNT EXIT
SETUP C.3 CLOCK_ADJ=
0 Sec/Day
+ 0 0 ENTR
EXIT
SETUP C.3 3 ) CLOCK_ADJ=0 Sec/Day
PREV NEXT JUMP EDIT PRNT
EXIT
SETUP C.3 ENTER VARS PASS: 818
8 1 8
ENTR
EXIT
SETUP C.3 2 ) DYN_SPAN=OFF
PREV
NEXT
JUMP
EDIT PRNT EXIT
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
52
GFC7001E Rev A7
6.3.6. Communications Menu (COMM)
The GFC7001E comes with 2 serial communications ports located on the rear panel.
The serial communication ports can be configured to use several different
communications protocols. By default the COM1 port is setup to use RS-232 and
COM2 port is configured to be a half-duplex, RS-485 port but can be configured to
be either a second RS-232 or, with the optional Ethernet interface, a 10BaseT
connection.
See Section 6.8 for more information on setting up these COM Ports.
6.3.7. GFC7001E Internal Variables
The GFC7001E has several user adjustable software variables.
Table 6–4: Variable Names (VARS)
Variable
Description
Legal Values
DAS_HOLD_OFF
Internal Data Acquisition System holdoff timer:
No data is stored in the iDAS channels during situations
when the software considers the data to be questionable
such as during warm up of just after the instrument
returns from one of its Calibration mode to SAMPLE Mode
May be set for
intervals between 0.5
– 20 min
DYN_ZERO
When ON, this function causes the analyzer to
automatically adjust the SLOPE and OFFSET of its
measurement calculation as the last step when
performing an AutoCal (see Section 7.4).
When DYN_ZERO is turned OFF, this data must be
updated manually.
OFF / ON
DYN_SPAN
When ON, this function causes the analyzer to
automatically adjust the SLOPE and OFFSET of its
measurement calculation as the last step when
performing an AutoCal (see Section 7.4)
When DYN_SPAN is turned OFF, this data must be
updated manually.
NOTE: USE OF DYN_SPAN FEATURE IS NOT
ALLOWED FOR APPLICATINS REQUIRING EPA
EQUIVALENCY.
OFF / ON
CLOCK_ADJ
Changes rate of the time-of-day clock to compensate for
variation in the internal Time of Day clock of each
analyzer.
-60 to 60 sec/day
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
53
To access the VARS menu press:
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
54
GFC7001E Rev A7
Change Rate of Time-of-Day Clock.
Calibrate Instrument at End of Span Check
Calibrate Instrument at End of Zero Check
Data Acquisition System Holdoff Timer
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS RNGE PASS CLK
MORE
EXIT
SETUP C.3
COMM
VARS
DIAG HALT EXIT
Exit at Any
Time to Return
to main the
Sample Display
SETUP C.3
0 ) DAS_HOLD_OFF=
15.0 Minutes
NEXT
JUMP
EDIT
PRNT EXIT
SETUP C.3
1 ) DYN_ZERO=
OFF
PREV
NEXT
JUMP
EDIT
PRNT EXIT
SETUP C.3
3 ) CLOCK_ADJ=
0 Sec/Day
PREV JUMP
EDIT
PRNT EXIT
SETUP C.3 CLOCK_ADJ=
0 Sec/Day
+ 0 0 ENTR
EXIT
SETUP C.3 ENTER VARS PASS: 818
8 1 8
ENTR
EXIT
SETUP C.3
2 ) DYN_SPAN=
OFF
PREV
NEXT
JUMP
EDIT
PRNT EXIT
SETUP C.3 DAS_HOLD_OFF=
15.0 Minutes
1 5 .0 ENTR
EXIT
SETUP C.3 DYN_ZERO=
OFF
OFF ENTR
EXIT
SETUP C.3 DYN_SPAN=
OFF
OFF ENTR
EXIT
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
55
6.4. Analog Outputs – Range Configuration
The analyzer has four Analog Outputs. A connector for these outputs is located on
the instruments back panel and is labeled A1, A2, A3 and A4 respectively (only A1
– A3 are used for the GFC7001E). All four outputs can be factory or user
configured for a full-scale output of 0.1V, 1V, 5V or 10V. The first three outputs can
be equipped with optional 0-20 mA current-loop drivers that can be configured
under software for 0-20, 2-20, or 4-20 mA operation.
6.4.1. Physical Range vs. Measurement
Range
Functionally, the Model GFC7001E Gas Filter Correlation CO Analyzer has one
hardware Physical Range that is capable of determining CO concentrations between
0 ppm and 1000 ppm. This architecture improves reliability and accuracy by
avoiding the need for extra, switchable, gain-amplification circuitry.
Most applications do not require anywhere near the full 0-1000 ppm range. The
analyzer includes software that configures and scales a “Measurement Range” to
allow the user to optimize the analyzer’s operation for their specific application.
The span of the instrument’s Measurement Range is also used during calibration
procedures. This ensures that the portion of the hardware Physical Range being
recorded is calibrated as accurately as possible. Additionally, the scale and limits
selected for the Measurement Range also sets the ranges of the analyzer’s A1 and
A2 Analog outputs.
Both the iDAS values stored in the CPU’s memory and the concentration values
reported on the front panel are unaffected by the settings chosen for the
Measurement Range(s) of the instrument.
The A1 and A2 outputs report CO Concentration and can also have their units of
measure and measure span adjusted.
EXAMPLE:
A1 OUTPUT: Output Signal = 0-5 VDC representing 0-100 ppm
concentration values.
A2 OUTPUT: Output Signal = 0 – 10 VDC representing 0-50 ppm
concentration values.
Additionally, these two outputs can be configured to operate independently or be
slaved together.
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
56
GFC7001E Rev A7
The TEST output is independent of the A1 and A2 outputs and is used to record
certain operational parameters. Range Scaling is dependent on the specific variable
chosen (see Section 6.4.7).
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
57
6.4.2. A1 & A2 Measurement Range
Modes
The first step in configuring the A1 and A2 outputs is to choose a Measurement
Range mode. There are three analog output range modes to choose from:
1. Single range mode sets a single maximum range for the analog output. If
Single range is selected both outputs are slaved together and will represent
the same measurement span (e.g. 0-50 ppm), however their electronic signal
levels may be configured for different ranges (e.g. 0-10 VDC vs. 0-.1 VDC –
See Section 6.5).
2. Dual range allows the A1 and A2 outputs to be configured for separate and
independent units of measure and measurement spans as well as separate
electronic signal levels.
3. Auto range mode gives the analyzer the ability to automatically switch the
A1 and A2 analog outputs between two ranges (low and high) dynamically as
the concentration value fluctuates.
The TEST Functions displayed on the front panel during SAMPLE mode will report
which of these two ranges is currently active and will also dynamically switch as
required.
Range status is also output via the External Digital I/O Status Bits (see
Section 6.7.1).
NOTE
Only one of the Range Modes described above may be active at any time.
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
58
GFC7001E Rev A7
To select the Analog Output Range Type press:
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS
RNGE
PASS CLK MORE EXIT
SETUP C.3 RANGE CONTROL MENU
MODE
SET UNIT EXIT
EXIT
Returns
to the Main
SAMPLE
Display
Go To
Section
6.4.3
Go To
Section
6.4.4
Go To
Section
6.4.5
SETUP C.3
RANGE MODE:
SNGL
SNGL DUAL AUTO ENTR EXIT
6.4.3. A1 & A2 Single Range Mode
This is the default Measurement Range mode for the analyzer. In this mode, both
analog outputs (A1 and A2) are set to the same range. This Measurement Range
can be set to any value between 1.0 and 1,000 ppm and is accessed through the
following keystroke sequence:
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
59
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS
RNGE
PASS CLK MORE EXIT
SETUP C.3 RANGE CONTROL MENU
MODE
SET UNIT EXIT
SETUP C.3 RANGE MODE:
SNGL
SNGL
DUAL AUTO ENTR EXIT
EXIT
Returns
to the Main
SAMPLE
Display
SETUP C.3 RANGE MODE:
SNGL
SNGL DUAL AUTO
ENTR
EXIT
SETUP C.3 RANGE CONTROL MENU
MODE
SET
UNIT EXIT
SETUP C.3 RANGE:
50.0 Conc
0 0 0
5 0 .0
ENTR
EXIT
SETUP C.3 RANGE CONTROL MENU
MODE SET UNIT
EXIT
Set Range value
between
1.0 and 1,000 ppm
Range mode
Defaults to
SNGL
Remember, while both A1 and A2 are reporting the same data within the same
Measurement Range span, their respective electronic signal levels can still be
configured differently (see Section 6.5) to meet the input requirements of different
recording devices.
6.4.4. A1 & A2 Dual Range Mode
Selecting Dual Range mode allows the A1 and A2 outputs to be configured with
different measurement spans.
The analyzer software calls these two ranges Low and High. The Low range setting
corresponds with the analog output labeled A1 on the Rear Panel of the instrument.
The Higher Range Setting corresponds with the A2 output. While the software
names these two ranges Low and High, they do not have to be configured that way.
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
60
GFC7001E Rev A7
For example: The Low range can be set for a span of 0-150 ppm while the high
range is set for 0-50 ppm.
When the instrument’s range mode is set to Dual or Auto, a second set of slope and
offset parameters is used for computing the concentration for the high range. Also,
the concentration field in the upper right hand corner of the display identifies which
concentration is currently being displayed: C1 = Low (or A1) and C2 = High (or
A2).
To set the ranges press following keystroke sequence.
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS
RNGE
PASS CLK MORE EXIT
SETUP C.3 RANGE CONTROL MENU
MODE
SET UNIT EXIT
SETUP C.3 RANGE MODE:
SNGL
SNGL
DUAL
AUTO ENTR EXIT
EXIT
Returns
to the Main
SAMPLE
Display
SETUP C.3 RANGE MODE:
DUAL
SNGL DUAL AUTO
ENTR
EXIT
SETUP C.3 RANGE CONTROL MENU
MODE
SET
UNIT EXIT
SETUP C.3 HIGH RANGE:
50.0 Conc
0 0 1
5 0 .0
ENTR
EXIT
SETUP C.3 LOW RANGE:
150.0 Conc
0 0 1
5 0 .0
ENTR
EXIT
SETUP C.3 RANGE CONTROL MENU
MODE SET UNIT
EXIT
The
LOW
and
HIGH
Ranges have separate
slopes and offsets for
computing the carbon
monoxide concentration.
The two ranges must be
independently calibrated.
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
61
6.4.5. A1 & A2 Auto Range Mode
When the Auto Range mode is selected, the instrument reports the same data with
the same measurement span on both the A1 and A2 outputs, but automatically
switches both outputs back and forth between a user selected Low Range and a
user selected High Range depending on the level of the CO concentration. The unit
will move from Low Range to High Range when the CO concentration exceeds to
98% of the Low Range span. The unit will return from High Range back to Low
Range once the CO concentration falls below 75% of the Low Range span.
To set the ranges press following keystroke sequence:
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
62
GFC7001E Rev A7
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS
RNGE
PASS CLK MORE EXIT
SETUP C.3 RANGE CONTROL MENU
MODE
SET UNIT EXIT
SETUP C.3 RANGE MODE:
SNGL
SNGL DUAL
AUTO
ENTR EXIT
EXIT
Returns
to the Main
SAMPLE
Display
SETUP C.3 RANGE MODE:
AUTO
SNGL DUAL AUTO
ENTR
EXIT
SETUP C.3 RANGE CONTROL MENU
MODE
SET
UNIT EXIT
SETUP C.3 HIGH RANGE:
50.0 Conc
0 0 1
5 0 .0
ENTR
EXIT
SETUP C.3 LOW RANGE:
150.0 Conc
0 0 1
5 0 .0
ENTR
EXIT
SETUP C.3 RANGE CONTROL MENU
MODE SET UNIT
EXIT
The Low and High
Ranges have separate
slopes and offsets for
computing the carbon
monoxide concentration.
The two ranges must be
independently calibrated.
Set the
LOW
and
HIGH
range value.
6.4.6. Setting the Measurement Range
Unit Type
The GFC7001E can display concentrations in ppb, ppm, ug/m3, mg/m3 units.
Changing units affects all of the COM port values, and all of the display values for
all Measurement Ranges. To change the units of Measure press:
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
63
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL SETUP
SETUP C.3
CFG DAS RNGE PASS CLK MORE EXIT
SETUP C.3 RANGE CONTROL MENU
MODE SET UNIT EXIT
SETUP C.3 CONC UNITS: PPM
PPM PPB UGM MGM ENTER EXIT
Select the preferred units of
measure.
EXAMPLE: Switching from
PPM to UGM
SETUP C.3 CONC UNITS: UGM
PPM PPB UGM MGM ENTER EXIT
EXIT Returns
to the Main SAMPLE
Display
EXIT Returns
to the SETUP
Menu
NOTE
Concentrations displayed in mg/m3 and ug/m3 use 0°C, 760 mmHg for Standard
Temperature and Pressure (STP).
Consult your local regulations for the STP used by your agency.
CAUTION
Once the units of Measurement have been changed the unit MUST be
recalibrated, as the “expected span values” previously in effect will no longer
be valid. Simply entering new expected span values without running the entire
calibration routine is not sufficient.
The following equations give approximate conversions between volume/volume
units and weight/volume units:
CO ppb x 1.25 = CO ug/m
3
CO ppm x 1.25 = CO mg/m
3
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
64
GFC7001E Rev A7
6.4.7. TEST Channel Output
When activated the TEST Analog Output channel cam be used to report the realtime value of one of several of the Test Function viewable from the SAMPLE mode
display.
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS RNGE PASS CLK
MORE
EXIT
SETUP C.3
COMM VARS
DIAG
HALT EXIT
Press Exit at
Any Time to
Return to DIAG
Menu
DIAG
SIGNAL I / O
NEXT
ENTR EXIT
DIAG
ANALOG OUTPUT
PREV
NEXT
ENTR
EXIT
DIAG
TEST CHANNEL: NONE
NEXT
ENTR
EXIT
DIAG
TEST CHAN OUTPUT
PREV NEXT
ENTR
EXIT
Press Exit at
Any Time to
Return to
SETUP Menu
Press Exit at
Any Time to
Return to Main
SAMPLE
Display
Continue pressin
NEXT
until …
DIAG
TEST CHANNEL: CO MEASURE
PREV NEXT
ENTR
EXIT
Press
PREV
or
NEXT
to move up
and down list of
functions
(See Table 5-7)
Press EXIT to
return to the
DIAG Menu
Press ENTR to
select the Function
on the display and
activate the Test
Channel
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
65
The Test Functions available to be reported are:
Table 6–5: Test Functions available to the TEST Analog Output Channel
Test Channel
Zero
Full Scale
NONE
Test Channel is turned off
CO MEASURE
0 mV
5000 mV*
CO REFERENCE
0 mV
5000 mV*
SAMPLE PRESS
0 "Hg
40 "Hg
SAMPLE FLOW
0 cc/m
1000 cc/m
SAMPLE TEMP
0°C
70°C
BENCH TEMP
0°C
70°C
WHEEL TEMP
0°C
70°C
CHASSIS TEMP
0°C
70°C
PHOTO DET
0 mV
5000 mV
* This refers to the internal voltage level of the function NOT the output
signal level of the Test channel itself.
Once a function is selected, the instrument not only begins to output a signal on the
A3 Analog Output, but a TEST parameter is added to the list of Test Functions
viewable via the Front Panel Display. To activate the TEST channel and select a Test
Function press:
6.4.8. Using the Dilution Option
The Dilution Ration Option is a software option that allows the user to compensate
for any dilution of the Sample Gas before it arrives at the Sample Inlet on the Rear
Panel of the instrument. Use of this feature requires that the degree of dilution be
known.
Using the Dilution Ration Option is a 4-Step process:
STEP 1: SELECT UNITS OF MEASURE – Follow the procedure defined in
Section 6.4.6.
STEP 2: SELECT THE RANGE – Use the same procedures as described in Sections
6.4.1 through 6.4.5. Make sure that the SPAN Value entered is the
maximum expected concentration of the UN-DILUTED calibration gas
and that the gas is input through the dilution probe.
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
66
GFC7001E Rev A7
STEP 3: SET DILUTION RATIO FACTOR –
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS
RNGE
PASS CLK MORE EXIT
SETUP C.3 RANGE CONTROL MENU
MODE SET UNIT
DIL
EXIT
DIL
only appears
if the Dilution
Ratio Option has
been installed
SETUP C.3
DIL FACTOR: 1.0 GAIN
0 0 0 1
.0 ENTR EXIT
Toggle these keys to set the Dilution
Factor.
This is the number by which the
analyzer will multiply the CO
Concentration of the gas passing
through the Sample Chamber.
SETUP C.3
DIL FACTOR: 200.0 GAIN
0 0 2
0 .0
ENTR EXIT
EXIT
ignores the
new setting.
ENTR
accepts the
new setting.
The analyzer multiplies the CO concentration of the Sample gas passing through its
Sample Chamber by the Dilution Ratio Factor. If, for instance, the sample gas is
being diluted by a factor of 20:1, entering a Dilution Ration Factor of 20 would
provide the proper compensation.
STEP 4: CALIBRATE THE ANALYZER - Once the above settings have been entered,
calibrate the instrument using one of the methods discussed in Section 7 of this
manual.
6.5. Analog Outputs - Electronic Configuration
The final step in configuring the analyzer’s four analog output channels is to set the
electronic signal type and range of each channel. This consists of selecting a type,
voltage or current, for A1 – A3 (if an optional current output driver has been
installed), and a signal level that matches the input requirements of the recording
device attached to the channel. A bipolar offset can be also added to the signal if
required.
In its standard configuration the analyzer Analog Outputs can be set for the
following DC voltage signal levels. Each range has is usable from -5% to + 5% of
the rated span.
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
67
Table 6–6: Analog Output Voltage Range Min/Max
Range Span
Minimum Output
Maximum Output
0-100 mVDC
-5 mVDC
105 mVDC
0-1 VDC
-0.05 VDC
1.05 VDC
0-5 VDC
-0.25 VDC
5.25 VDC
0-10 VDC
-0.5 VDC
10.5 VDC
The default offset for all ranges is 0 VDC.
The following DC Current output options are also available from the factory:
Table 6–7: Analog Output Current Loop Min/Max
Range Span
Minimum Output
Maximum Output
2-20 mADC
1 mADC
21 mADC
4-20 mADC
3 mADC
21 mADC
The default offset for all ranges is 0 mADC.
Pin-outs for the Analog Output connector at the rear panel of the instrument are:
Table 6–8: Analog Output Pin Assignments
PIN
Analog Output
VDC Signal
mADC Signal
1
V Out
I Out +
2A1Ground
I Out -
3
V Out
I Out +
4A2Ground
I Out -
5
V Out
I Out +
6A3Ground
I Out -
7
V Out
Not Available
8
A4 (Spare)
Ground
Not Available
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
68
GFC7001E Rev A7
ANALOG
A1 A2 A3 A4
1 2 3 4 5 6 7 8
Figure 6–2: Analog Output Pin Assignments
6.5.1. Voltage Output Range Selection
and Offset Adjustment
To select an output signal level or add a DC offset to one of the analyzer Analog
Output Channels press:
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
69
Calibrates Automatically
Exit to Return
to the main
Sample Display
DIAG
ANALOG I / O CONFIGURATION
PREV NEXT
ENTR
EXIT
DIAG AIO AIN A/C FREQUENCY: 60 HZ
SET>
EDIT
EXIT
DIAG AIO AOUT CALIBRATED: NO
< SET
SET>
CAL
EXIT
FROM ANALOG I/O CONFIGURATION MENU
Toggle these
Keys to set the
DC Offset
of the selected
channel
Exit to Return
to the I/O
Configuration
Menu
DIAG AIO
CONC_OUT_2 RANGE: 5V
SET> EDIT
EXIT
DIAG AIO OUTPUT RANGE:
5V
0.1V 1V 5V 10V CURR ENTR
EXIT
DIAG AIO
CONC_OUT_2 REC OFS: 0 mV
< SET
SET> EDIT
EXIT
DIAG AIO
RECORD OFFSET: 0 MV
+ 0 0 0 0 ENTR
EXIT
DIAG AIO
CONC_OUT_2 CALIBRATED: NO
<SET
CAL
EXIT
DIAG AIO CONC_OUT_2 CALIBRATED:
YES
<SET CAL
EXIT
These Keys set
the Signal Level
of the selected
channel
DIAG AIO
CONC_OUT_2:5V, CAL
< SET SET>
EDIT
EXIT
Press
SET>
to select the Analog Output
channel to be configured:
DISPLAYED AS = CHANNEL
CONC_OUT_1 = A1
CONC_OUT_2 = A2
TEST OUTPUT = A3
Then Press
EDIT
to continue
Pressing
ENTR
records the new
setting and returns
to the previous
menu
Pressing
EXIT
ignores the new
setting and returns
to the previous
menu
6.5.2. Current Loop Output Span and
Offset Adjustment
A Current Loop Option may be purchased for each of the Analog outputs of the
analyzer. This option places circuitry in series with the output of the D-to A
converter on the Mother Board. This circuitry changes the normal DC voltage output
to a 0-20 milliamp signal with a ± 5% over/under range.
Each of the three Analog Outputs can be independently converted to current loop
operation. The outputs can be ordered scaled to any set of limits within that
0-20 mA range, however most current loop applications call for either 2-20 mA or
4-20 mA range spans.
Adjusting the signal zero and span levels of the current loop output is done by
raising or lowering the voltage output of the D-to-A converter circuitry on the
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
70
GFC7001E Rev A7
analyzer’s Mother Board. This raises or lowers the signal level produced by the
Current Loop Option circuitry.
The software allows this adjustment to be made in 100, 10 or 1 count increments.
Since the exact amount by which the current signal is changed per D-to-A count
varies from Output-to-Output and instrument–to–instrument, you will need to
measure the change in the signal levels with a separate, current meter placed in
series with the output circuit.
mADC
IN OUT
I OUT +
I OUT -
I IN +
I IN -
Recordeing
Device
MODEL
GFC7000E
See Table 5–8 for
pin assignments on
the for ANALOG
connector located on
the instruments rear
panel
Figure 6–3: Setup for Checking Current Output Signal Levels
NOTE
Do not exceed 60 V peak voltage between current loop outputs and
instrument ground.
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
71
To adjust the a zero and span signal levels of the Current Outputs, press:
EXAMPLE
Exit to Return
to the main
Sample Display
DIAG
ANALOG I / O CONFIGURATION
PREV NEXT
ENTR
EXIT
DIAG AIO AIN A/C FREQUENCY: 60 HZ
SET>
EDIT
EXIT
DIAG AIO AOUT CALIBRATED: NO
< SET
SET>
CAL
EXIT
FROM ANALOG I/O CONFIGURATION MENU
DIAG AIO
CONC_OUT_2 RANGE: CURR
<SET
SET>
EDIT
EXIT
DIAG AIO
CONC_OUT_2 CALIBRATED: NO
< SET
CAL
EXIT
DIAG AIO
CONC_OUT_2 ZERO: 0 mV
U100
UP10
UP DOWN DN10 D100 ENTR EXIT
DIAG AIO
CONC_OUT_CURR, NO CAL
< SET SET>
EDIT
EXIT
Press
SET>
to select the Analog Output
channel to be configured:
DISPLAYED AS = CHANNEL
CONC_OUT_1 = A1
CONC_OUT_2 = A2
TEST OUTPUT = A3
Then Press
EDIT
to continue
DIAG AIO AIN CALIBRATED: NO
SET>
EDIT
EXIT
ENTR r
eturns
to the previous
menu
These keys
increment/decrement the
ZERO/SPAN D-to-A converter
output by
100, 10 or 1 counts
respectively.
The resulting change in output
voltage is dispalyed on the
TOP Line.
Continue adjustments until the
correct current level is
measured on a current meter
placed in series with the
output between the Model
300E and the recording
device.
DIAG AIO
CONC_OUT_2 ZERO: 27 mV
U100 UP10 UP DOWN DN10 D100
ENTR EXIT
EXIT
ignores the
new setting.
ENTR
accepts the
new setting.
DIAG AIO
CONC_OUT_2 CALIBRATED: YES
< SET
CAL
EXIT
DIAG AIO
CONC_OUT_2 SPAN: 10000 mV
U100 UP10
UP DOWN DN10
D100
ENTR EXIT
EXAMPLE
DIAG AIO
CONC_OUT_2 ZERO: 9731 mV
U100 UP10 UP DOWN DN10 D100
ENTR EXIT
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
72
GFC7001E Rev A7
An alternative method for setting up the Current Loop outputs is to connect a
250 ohm ±1% resistor across the current loop output in lieu of the current meter.
Using a Voltmeter connected across the resistor follow the procedure above but
adjust the output for the following values:
Table 6–9: Current loop Output Check
% FS
Voltage across Resistor
for 2-20 mA
Voltage across Resistor
for 4-20 mA
0
0.5 VDC
1 VDC
100
5.0
5.0
6.6. Diagnostic Mode (DIAG)
A series of diagnostic and configuration tools is grouped together under the menu
heading DIAG located under the SETUP Menu, in the MORE (see Appendix A)
subsection. These tools can be used in a variety of troubleshooting and diagnostic
procedures.
The various operating modes available under the DIAG menu is:
Table 6–10: Diagnostic Mode (DIAG) Functions
Display
Mode
Meaning
Manual
Section
DIAG I/O
SIGNAL I/O: Allows observation of all digital and analog signals
present in the instrument. Allows certain digital signals to be
toggled between ON and OFF states.
6.6.1
DIAG AOUT
ANALOG I/O: The analyzer is performing an Analog output Step
Test. This calibrates the Analog output channels.
6.6.2
DIAG AIO
ANALOG I/O CONFIGURATION: Analog I/O parameters are
available for viewing. Allows certain signals to be toggled between
ON and OFF states.
6.6.3
DIAG ELEC
ELECTRIC TEST: The analyzer is performing an Electric Test. This
test simulates IR detector signal in a known manner so that the
proper functioning of the Sync/Demod Board can be verified.
6.6.4
DIAG DARK
DARK CALIBRATION: The analyzer is performing a Dark
Calibration procedure. This procedure measures and stores the
inherent DC offset of the Sync/Demod Board electronics.
6.6.5
DIAG FCAL
FLOW CALIBRATION: The analyzer is performing a calibration of
the Gas Pressure/Flow Sensors.
6.6.6
DIAG TCHN
TEST CHAN OUTPUT: Used to configure the TEST Analog Output
channel.
6.4.7
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
73
To access the DIAG functions press:
SETUP C.3
ENTER DIAG PASS: 818
8 1 8
ENTR
EXIT
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS RNGE PASS CLK
MORE
EXIT
SETUP C.3
COMM VARS
DIAG
HALT EXIT
Press Exit at
Any Time to
Return to DIAG
Menu
DIAG
SIGNAL I / O
NEXT
ENTR EXIT
DIAG
ANALOG OUTPUT
PREV
NEXT
ENTR
EXIT
DIAG
ANALOG I / O CONFIGURATION
PREV
NEXT
ENTR EXIT
DIAG
ELECTRICAL TEST
PREV
NEXT
ENTR
EXIT
DIAG
DARK CALIBRATION
PREV
NEXT
ENTR
EXIT
DIAG
FLOW CALIBRATION
PREV
NEXT
ENTR EXIT
DIAG
TEST CHAN OUTPUT
PREV NEXT
ENTR EXIT
Press Exit at
Any Time to
Return to
SETUP Menu
Press Exit at
Any Time to
Return to Main
SAMPLE
Display
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
74
GFC7001E Rev A7
6.6.1. Signal I/O Diagnostic Functions
The signal I/O diagnostic mode allows access to the digital and analog I/O in the
analyzer. Some of the digital signals can be controlled through the keyboard. See
Appendix A for a complete list of the parameters available for review under this
menu.
NOTE
Any Signal I/O values set while in the Signal I/O function remain as set until EXITING
the Signal I/O menu.
The Analyzer software then regains control of these signals upon exit.
To enter the signal I/O test mode, press:
=
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
EXAMPLE
SETUP C.3
CFG DAS RNGE PASS CLK
MORE
EXIT
SETUP C.3
COMM VARS
DIAG
HALT EXIT
DIAG
SIGNAL I / O
PREV NEXT
JUMP
ENTR
EXIT
DIAG I / O
Test Signals Displayed Here
PREV NEXT
JUMP
PRNT EXIT
See Appendix D for a
complete list of
available SIGNALS
DIAG I / O
JUMP TO: 5
0 5 ENTR
EXIT
To Jump
to Signal no 5:
SAMPLE_LED
DIAG I / O
SAMPLE_LED = ON
PREV NEXT JUMP
ON
PRNT EXIT
Exit to Return
to the
Diag Menu
SETUP C.3 ENTER DIAG PASS: 818
8 1 8
ENTR
EXIT
Use the NEXT & PREV
keys to move UP or
DOWN one signal type.
Use the JUMP key go directly
to a specific Signal
(see Appendix D for Jump
address numbers.
Pressing the PRNT Key will send a
formatted printout over the Serial I/O Port.
This Requires that one of the
RS-232/485 com ports be active and
connected to a peripheral device.
Press Exit to
return to the
SAMPLE Mode
display
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
75
6.6.2. Analog Output Step Test
This test can be used to assure the analog outputs are calibrated and working
properly. The test forces the A1, A2 and A3 analog output channels to produce
signals ranging 0% to 100% of whatever the range in which they are set in 20%
increments. This test is useful for verifying the operation of the
datalogging/recording devices attached to the analyzer.
To begin the Analog Output Step Test press:
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS RNGE PASS CLK
MORE
EXIT
SETUP C.3
COMM VARS
DIAG
HALT EXIT
Exit at Any
Time to Return
to main the
Sample Display
DIAG SIGNAL I / O
NEXT
ENTR
EXIT
Exit 2X’s
to Return
to the
Diag Menu
SETUP C.3 ENTER DIAG PASS: 818
8 1 8
ENTR
EXIT
DIAG
ANALOG OUTPUT
PREV NEXT
ENTR
EXIT
DIAG AOUT
ANALOG OUTPUT
0%
EXIT
Performs
Analog Output
step test.
0% - 100%
DIAG AOUT ANALOG OUTPUT
[0%] EXIT
Pressing the key under the STEP % will
halt the Test.
Brackets will appear Around the Step %:
EXAMPLE [20]
Pressing the same key again will resume
the Test.
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
76
GFC7001E Rev A7
6.6.3. Analog I/O Configuration
Table 6–11: DIAG – Analog I/O Functions
Sub Menu
Function
Manual
Section
AIN A/C FREQUENCY
Sets the analyzer firmware for the frequency of the line power
supplied to the instrument (changing this requires the A/D to be
recalibrated (see below).
6.6.3.1
AIN CALIBRATED
Initiates a calibration of the D-to-A Converter circuit located on the
Mother Board.
6.6.3.2
AOUT CALIBRATED
Initiates a calibration of the A1, A2 and A3 analog output channels
that determines the slope and offset inherent in the circuitry of
each output. These values are stored in the and applied to the
output signals by the CPU automatically.
6.6.3.3
CONC_OUT_1
Sets the basic electronic configuration of the A1 output. There are
three options:
RANGE: Selects the signal type and level of the output.
REC OFS: Allows them input of a DC Voltage to let the user
manually offset the output level.
CALIBRATED: Performs the same calibration as AOUT
CALIBRATED, but on this one channel only.
NOTE: Any change to RANGE or A1 OFS requires recalibration of
this output.
6.4, 6.5.1
6.5.1
N/A
CONC_OUT_2
Sets the basic electronic configuration of the A2 output. There are
three options:
RANGE: Selects the signal type and level of the output.
REC OFS: Allows them input of a DC Voltage to let the user
manually offset the output level.
CALIBRATED: Performs the same calibration as AOUT
CALIBRATED, but on this one channel only.
NOTE: Any change to RANGE or A1 OFS requires recalibration of
this output.
6.4, 6.5.1
6.5.1
N/A
TEST_OUTPUT
Sets the basic electronic configuration of the A3 output. There are
three options:
RANGE: Selects the signal type and level of the output.
REC OFS: Allows them input of a DC Voltage to let the user
manually offset the output level.
CALIBRATED: Performs the same calibration as AOUT
CALIBRATED, but on this one channel only.
NOTE: Any change to RANGE or A1 OFS requires recalibration of
this output.
6.4.7, 6.5.1
6.5.1
N/A
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
77
6.6.3.1. AIN A/C Frequency
To switch the analyzer’s line power frequency press:
Exit to Return
to the Analog I/O
Configuration Menu
DIAG
ANALOG I / O CONFIGURATION
PREV NEXT
ENTR
EXIT
DIAG AIO
AIN A/C FREQUENCY:
60 HZ
SET>
EDIT
EXIT
DIAG AIO AIN A/C FREQUENCY:
60 HZ
50 HZ
60 HZ
ENTR
EXIT
DIAG AIO AIN A/C FREQUENCY:
50 HZ
SET> EDIT
EXIT
STARTING FROM DIAGNOSTIC MENU
(see Section 6.6)
Select the AC frequency of
the Line Power being
Supplied to the analyzer.
6.6.3.2. AIN Calibration
Exit at Any
Time to Return
to the main
DIAG Menu
DIAG
ANALOG I / O CONFIGURATION
PREV NEXT
ENTR
EXIT
DIAG AIO AIN A/C FREQUENCY: 60 HZ
SET>
EDIT
EXIT
DIAG AIO
AIN CALIBRATED:
NO
< SET SET>
CAL
EXIT
DIAG AIO
CALIBRATING A/D ZERO
CALIBRATING A/D SPAN
DIAG AIO AIN CALIBRATED:
YES
< SET SET> CAL
EXIT
Calibrates
Automatically
Exit to Return to
the Analog I/O
Configuration
Menu
STARTING FROM DIAGNOSTIC MENU
(see Section 6.6)
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
78
GFC7001E Rev A7
6.6.3.3. AOUT Calibration
DIAG AIO
CALIBRATING CONC_OUT_1
CALIBRATING CONC_OUT_2
CALIBRATING TEST_OUTPUT
Exit at Any
Time to Return
to the main
DIAG Menu
DIAG
ANALOG I / O CONFIGURATION
PREV NEXT
ENTR
EXIT
DIAG AIO AIN A/C FREQUENCY: 60 HZ
SET>
EDIT
EXIT
DIAG AIO
AOUT CALIBRATED:
NO
< SET SET>
CAL
EXIT
DIAG AIO AOUT CALIBRATED:
YES
< SET SET> CAL
EXIT
Calibrates
Automatically
Exit to Return
to the I/O
Configuration
Menu
STARTING FROM DIAGNOSTIC MENU
(see Section 6.6)
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
79
6.6.4. Electric Test
The Electric test function substitutes simulated signals for CO MEAS and CO REF,
generated by circuitry on the Sync/Demod Board, for the output of the IR PhotoDetector. While in this mode the user can also view the same Test Functions
viewable from the main SAMPLE display. When the test is running, the
concentration reported on the front panel display should be 40.0 ppm.
To activate the Electric Test press:
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS RNGE PASS CLK
MORE
EXIT
SETUP C.3
COMM VARS
DIAG
HALT EXIT
Exit at Any
Time to Return
to main the
Sample Display
DIAG SIGNAL I / O
NEXT
ENTR
EXIT
Exit returns
to the
Diag Menu
SETUP C.3 ENTER DIAG PASS: 818
8 1 8
ENTR
EXIT
Repeat Pressing
NEXT
unti . . .
DIAG
ELECTRIC TEST
PREV NEXT
ENTR
EXIT
Press
<TST TST>
to view Test
Functions
NOTE:
CO MEAS
and
CO REF
will be
artificially altered to enforce a CO
reading of
40.0
ppm.
All other Test Functions will report the
DIAG ELEC RANGE=50.0 PPM
CO= 40.0
<TST TST> EXIT
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
80
GFC7001E Rev A7
6.6.5. Dark Calibration Test
The Dark Calibration Test interrupts the signal path between the IR Photo-Detector
and the remainder of the Sync/Demod Board circuitry. This allows the instrument
to compensate for any voltage levels inherent in the Sync/Demod circuitry that
might effect the calculation of CO concentration. Performing this calibration returns
two offset voltages, One for CO MEAS and on for CO REF that are automatically
added to the CPU’s calculation routine. The two offset voltages from the last
calibration procedure may be reviewed by the user via the front panel display.
To activate the Dark Calibration procedure or review the results of a previous
calibration, press:
Calibration runs automaitcally
Electric offset for Measurement signal
Electric offset for Reference signal
SAMPLE RANGE = 50.0 PPM CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS RNGE PASS CLK
MORE
EXIT
SETUP C.3
COMM VARS
DIAG
HALT EXIT
Exit at Any
Time to Return
to main the
SETUP Menu
DIAG SIGNAL I / O
NEXT
ENTR EXIT
Exit returns
to the
previous menu
SETUP C.3 ENTER DIAG PASS: 818
8 1 8
ENTR
EXIT
Repeat Pressing
NEXT
unti . . .
DIAG
DARK CALIBRATION
PREV NEXT
ENTR
EXIT
DIAG DARK
CO DARK CALIBRATION
VIEW CAL EXIT
DIAG DARK
REF DARK OFFSET: 0.0 mV
EXIT
DIAG DARK
MEAS DARK OFFSET: 0.0 mV
EXIT
DIAG DARK
DARK CAL 1% COMPLETE
EXIT
DIAG DARK
DARK CALIBRATION ABORTED
EXIT
Display
tracks %
complete
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
81
6.6.6. Flow Calibration
This procedure allows the user to calibrate the flow sensing circuitry of the analyzer
to match the flow reported by an independent flow meter connected to the Sample
inlet of the analyzer. See Section 9.3.5 for instructions on performing this
calibration.
6.7. External Digital I/O
6.7.1. Status Outputs
The Status Outputs report analyzer conditions via optically isolated NPN transistors,
which sink up to 50 mA of DC current. These outputs can be used interface with
devices that accept logic-level digital inputs, such as Programmable Logic
Controllers (PLC’s). Each Status bit is an open collector output that can withstand
up to 40 VDC. All of the emitters of these transistors are tied together and available
at D.
NOTE
Most PLC’s have internal provisions for limiting the current that the input will draw from
an external device. When connecting to a unit that does not have this feature, an
external dropping resistor must be used to limit the current through the transistor
output to less than 50 mA. At 50 mA, the transistor will drop approximately 1.2V from
its collector to emitter.
The status outputs are accessed via a 12-pin connector on the analyzer’s rear panel
labeled STATUS. The function of each pin is defined in Table 6–4.
STATUS
1 2 3 4 6 7 8 - +5
Figure 6–4: Status Output Connector
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
82
GFC7001E Rev A7
The pin assignments for the Status Outputs are:
Table 6–12: Status Output Pin Assignments
Output #
Status
Definition
Condition
1
SYSTEM OK
On if no faults are present.
2
CONC VALID
On if CO concentration measurement is valid.
If the CO concentration measurement is invalid, this bit is OFF.
3
HIGH RANGE
On if unit is in high range of DUAL or AUTO Range Modes.
4
ZERO CAL
On whenever the instruments ZERO point is being calibrated.
5
SPAN CAL
On whenever the instruments SPAN point is being calibrated.
6
DIAG MODE
On whenever the instrument is in DIAGNOSTIC mode.
7
SPARE
8
SPARE
D
EMITER BUSS
The emitters of the transistors on pins 1-8 are bussed together.
+
DC POWER
+ 5 VDC
Digital Ground
The ground level from the analyzer’s internal DC Power
Supplies.
6.7.2. Control Inputs
Several Control Inputs are provided via an 10-pin connector labeled CONTROL IN
on the analyzer’s rear panel. These are opto-isolated digital inputs that are
activated when a 5 VDC signal is applied to the “+” pin.
These inputs allow the user to remotely initiate Zero and Span calibrations. Two
methods for energizing the inputs is provided below; the first using the internal
+5V available on the CONTROL IN connector and the second, if an external,
isolated supply is employed.
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
Operating Instructions
GFC7001E Rev A7
83
Table 6–13: Control Input Pin Assignments
Input #
Status
Definition
On Condition
A
REMOTE ZERO
CAL
The Analyzer is placed in Zero Calibration mode. The mode
field of the display will read ZERO CAL R.
B
REMOTE
SPAN CAL
The Analyzer is placed in Span Calibration mode. The mode
field of the display will read SPAN CAL R.
C
SPARE
D
SPARE
E
SPARE
F
SPARE
Digital Ground
May be connected to the ground of the datalogger/recorder.
U
DC power for
Input pull ups
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 +5V
Supply
Internal source of +5V which can be used to actuate control
inputs when jumpered to the U pin.
CONTROL IN
A B C D E F U +
S
P
A
N
Z
E
R
O
CONTROL IN
A B C D E F U +
-
+
5 VDC Power
Supply
S
P
A
N
Z
E
R
O
Local Power Connections
External Power Connections
Figure 6–5: Control Inputs
Operating Instructions
Model GFC7001E Carbon Monoxide
Analyzer
Instruction Manual
84
GFC7001E Rev A7
6.8. Serial Interfaces
The GFC7001E has two serial interface ports COM-A and COM-B. Both ports operate
identically and give the user the ability to communicate with, issue commands to,
and receive data from the analyzer via an external computer system or terminal.
The default configuration for either port is 19,200 bits/second, adjustable down to
300 bits per second or up to 115200 bits per second. COM-A is always configured
as an RS-232 port. COM-B can be configured to be an RS-232, RS-485 half-duplex,
or 10BaseT Ethernet connection; by default COM-B is configured for RS-485
operation. An optional interface assembly is required for Ethernet operation.
Multidrop Communications
There are two options for users who wish to connect multiple analyzers with a
single computer terminal or datalogging device over a single serial communications
line (i.e. daisy chain). Either port can be equipped with an optional RS-232
multidrop assembly (contact TAI sales for price and availability), or alternatively up
to 8 analyzers can be multidropped together with no adapters by connecting using
COM-B configured for RS-485 operation (contact the factory for further
information).
Ethernet Communications
When equipped with the optional Ethernet interface assembly (contact TAI sales for
price and availability), the analyzer can be connected to any standard 10BaseT
Ethernet network. The interface operates as a standard port 3000 TCP-IP device.
This allows COM-B to be connected via the Internet to a remote computer using
either APIcom or a serial port redirector.
6.8.1. Serial I/O Default Settings
As received from the factory, the analyzer is set up to emulate a DCE or modem,
with Pin 3 designated for receiving data and Pin 2 designated for sending data.
DEFAULT BAUD RATE: 19,200 bits per second
DATA BITS: 8 with one Stop bit, no Start bit
PARITY: None
The RS-232, db-9 connector on the analyzer’s Rear panel is configured as follows:
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