Part General Information | Teledyne 9110T instruction

Model 9110TH NOx Analyzer

Part I

PART I

GENERAL INFORMATION

Teledyne Analytical Instruments

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Teledyne instruction manual Part General Information, Model 9110TH NOx Analyzer Part

Contents

M9110T Date 11/15/13 Teledyne Electronic Technologies Copyright 2013 Teledyne Analytical Instruments Model 9110T NOx Analyzer Model 9110T- Standard Touch Screen Version Model 9110TH NOx Analyzer Specific Configuration Mounting Options Model 9110T NOx AnalyzerSpecific ConfigurationPump Mounting Options Rear Panel Gas Fittings Background Gas This option includes two concentration alarm relays Model 9110T NOx Analyzer Specific Configuration Model 9110TH NOx Analyzer Safety Messages Safety MessagesCustomer Service Department Or by accessing various service options on our website at Model 9110T NOx Analyzer Safety Messages Consignes DE SécuritéMise EN Garde Maintenance of the analyzer or its parts Instrument and possibly invalidate the warrantyAbout this Manual Organization This page intentionally left blank Table of Contents Model 9110T NOx Analyzer Table of Contents Model 9110TH NOx Analyzer Table of Contents 285 Appendix a Version Specific Software Documentation Figures 229 Ventilation Clearance Tables 325 This page intentionally left blank Model 9110TH NOx Analyzer Part Part General Information Model 9110T NOx Analyzer Part Features OverviewModel 9110TH NOx Analyzer Introduction Options DocumentationModel 9110T NOx Analyzer Introduction Analyzer Options Description/Notes Reference Number 9110T Analyzer Weighs about 18 KG 40 Pounds Option Description/Notes Reference NumberAmbient Zero and Ambient Span Valves Ambient Zero and Pressurized Span Valves USB Port For remote connection Specifications 9110T Basic Unit Specifications ParameterSpecification Parameter Specification Software Settings for EPA Equivalence ParameterEPA Equivalency Designation Other Type Certifications Approvals and CertificationsCalibration North American This page intentionally left blank Under Customer Support Return Authorization Instrument warranty. Refer to for more information onUnpacking the 9110T Analyzer Model 9110TH NOx Analyzer Getting Started Ventilation Clearance Instrument LayoutModel 9110T NOx Analyzer Getting Started 10 cm / 4 Front Panel Layout Front Panel Display Screen and Touch Control Buttons Field Description/Function Display Screen and Touch Control Description Actual display Provides a description of each component on the rear panel Rear Panel Internal Chassis Layout Internal Layout Top View with IZS Option Internal Layout Top View Showing Other Options Connecting Power Connections and SetupConnecting Analog Inputs Option Electrical Connections Connecting Analog Outputs Analog Input Pin AssignmentsPIN Description DAS Parameter Test Channel Current Loop Analog Outputs Option 41 Setup Current Loop Option Installed on the Motherboard 10 Status Output Connector Status Output Pin Assignments Connecting the Status Outputs Diag Mode Connecting the Control InputsInput # On Condition Concentration Alarm Relay Option Alarm 1 RelayAlarm 2 Relay & Alarm 3 Relay Alarm 4 Relay Connecting the Communications Interfaces Before using Configuration SectionCommunication Anything other than Multidrop communication 13 Rear Panel Connector Pin-Outs for RS-232 Mode Using RS-485 operation ∙ Parity NoneRS-232 Multidrop Option 62 Connection 15 Jumper and Cables for Multidrop Mode Analyzer HostLast Analyzer Time, each by its unique ID see above Testing it before setting up the rest of the chain Pneumatic ConnectionsRS-485 Connection Procedures defined in Section Been made check all pneumatic fittings for leaks usingAbout Zero Air and Calibration Span Gas Cc3/min x Available CylindersCalibration Span GAS NIST-SRM Type Nominal Concentration Span GAS for Multipoint Calibration Teledyne Analytical Instruments Connect a sample gas line to the Sample inlet Sample GAS SourceCalibration GAS Sources 13.3.13.2 or 13.3.13.3 for detailed check if leak suspected Pneumatic Layout for Basic ConfigurationVenting Exhaust Outlet This valve package includes 19 Pneumatics, Basic Configuration 20 Rear Panel Layout with Z/S Valve Options OPT 50A Attach a sample inlet line to the Sample inlet fitting 13.3.12 Mode Valve Condition Valve Port Status Sample Teledyne Analytical Instruments Attach a line to the SPAN2/VENT outlet. It should be Pneumatic Layout for Ambient ZERO/PRESSURIZED Span OPT 50B 10 Valve Operating States OPT 50B installed Mode Valve Condition Valve Port StatusZero Scrubber and Internal Span Source IZS OPT 50G Nitric Acid and the Chemistry of NO2 Permeation Tubes Internal Span GAS Generation Pneumatic Layout for Zero Scrubber and IZS OPT 50G Gas Conditioner Options Ammonia Removal Sample Conditioner OPT 86AZero AIR Scrubber OPT 86C, for Z/S Valves Model 9110TH NOx Analyzer Getting Started Start UP STARTUP, Functional CHECKS, and Initial Calibration Model 9110TH NOx Analyzer Getting Started 12 Possible Warning Messages at Start-Up Initial Calibration Functional Checks Following procedure assumes that Interferents for NOX, no and NO2 MeasurementsCalibration on the analyzer Verifying the Reporting Range Settings Independently Verify the Precise Concentration Value of the Span gasesNo x Must be identical Verifying the Expected NOX and no Span GAS Concentration Model 9110TH NOx Analyzer Getting Started Initial ZERO/SPAN Calibration Procedure Improving our service and our products. Thank YOU This page intentionally left blank Page Part Operating Instructions Model 9110T NOx Analyzer Part An allowable value, the Entr button will re-appear Model 9110TH NOx Analyzer Overview of Operating Modes Test Functions Sample ModeModel 9110T NOx Analyzer Overview of Operating Modes Analyzer Operating Modes Samp To view these Test functions, press Viewing 9110T Test Functions Absolute atmospheric pressure System Reset Cannot DYN SpanCannot DYN Zero Setup Mode Calibration Mode Primary Setup Menu Password SecuritySecondary Setup Menu Setup MORE Primary Setup Mode Features and Functions Entered value had not been accepted Setup ACAL Automatic Calibration Option Setup  CFG Configuration InformationSetup DAS Internal Data Acquisition System Model 9110TH NOx Analyzer Setup Menu Model 9110T NOx Analyzer Setup Menu Setup RNGE Analog Output Reporting Range ConfigurationPhysical Ranges Analog Output Reporting Ranges When switching between reporting range modes, Always check Analog OUTFor the other modes Reset the upper range limits for the new mode selection Analog Output Reporting Range Default Settings IND Mode Analog Output Assignments Teledyne Analytical Instruments 100 Teledyne Analytical Instruments 101 High physical ranges referred to in Section Teledyne Analytical Instruments 103 Importantimpact on Readings or Data Setup  Rnge  DIL Using the Optional Dilution Ratio Feature Teledyne Analytical Instruments 105 To enable passwords, press Setup  Pass Password ProtectionPassword Levels Password Level Has to press Entr to access the password-protected menus Setting the Time of DAY Setup  CLK Setting the Internal TIME-OF-DAY Clock Adjusting the Internal CLOCK’S Speed ID Machine Identification Setup  Comm Communications Ports Use the SETUPCOMMCOM1COM2 menus to Setup  Vars Variables Setup and DefinitionInet Ethernet COM1COM2 MODE, Baude Rate and Test Port Allowed Vars Variable Description Default Values OFFAuto Teledyne Analytical Instruments 113 Setup  Diag Diagnostics Functions Teledyne Analytical Instruments 115 Stsystemok = on STSYSTEMOK=ON Analog Output Diag Aout Analog I/O Configuration Diag AIO Accessing the Analog I/O Configuration Submenus To access the Analog I/O Configuration sub menu, press Analog Output Voltage Range Min/Max Range Name Range Span Minimum Output Maximum OutputCurr Teledyne Analytical Instruments 120 Automatic Individual Calibration of the Analog Outputs Analog output is enabled. See Section Teledyne Analytical Instruments 122 Adjusted. See Section Teledyne Analytical Instruments 124 Teledyne Analytical Instruments 125 Teledyne Analytical Instruments 126 Current Loop Output Check Turning AN Analog Output OVER-RANGE Feature ON/OFF Adding a Recorder Offset to AN Analog Output Model 9110TH NOx Analyzer Setup Menu AIN Calibration SET Exit External Analog Inputs XIN1…XIN8 Option Configuration Teledyne Analytical Instruments 131 Test functions available to be reported are listed in Table To activate the Test Channel and select a function, press Optic Test Ozone GEN Override Electrical TestFlow Calibration Changes with low-level calibration Data Terminal / Communication Equipment DTE DEC Communication MODES, Baud Rate and Port TestingCommunication Modes MODE1 Model 9110T NOx Analyzer Communications Setup and Operation Teledyne Analytical Instruments 137 COM Port Baud Rate COM Port Testing Setup X.X Primary Setup Menu Sample RANGE=500.0 PPB NOX= TST TST CAL SetupSecondary Setup Menu Comm Vars Communications Menu Ethernet Status Indicators To configure Ethernet communication manuallyEthernet LED Function Teledyne Analytical Instruments 141 Teledyne Analytical Instruments 142 Default Ethernet setting is Dhcp Access the Communications Menu SETUPMORECOMM, see Teledyne Analytical Instruments 145 Teledyne Analytical Instruments 146 USB Port for Remote Access Baud Rate COM2 Mode Settings Quiet Mode Computer Mode 1 ModePC match check the PC baud rate and change if needed Communications Protocols Minimum RequirementsActions Teledyne Analytical Instruments 150 Properly set RS-232 Communication Parameters for Hessen ProtocolParameter Standard Hessen Activating Hessen Protocol Teledyne Analytical Instruments 153 To select a Hessen Protocol Type press Mode ID Mode Description CMDTo Select a Hessen response mode, press BCC GAS TYPE,RANGE,GAS ID,REPORTED Hessen Protocol GAS List Entry Format and Definitions NO, 0, 212, Reported NO2, 0, 213, Reported To add or edit an entry to the Hessen Gas List, pressEditing or Adding Hessen GAS List Entries Deleting Hessen GAS List Entries To delete an entry from the Hessen Gas list, press Setting Hessen Protocol Status Flags Status Flag NAME3 Default BIT Assignment Default Hessen Status Flag AssignmentsOperational Flags Unassigned Flags Instrument ID To assign or reset the status flag bit assignments, press This page intentionally left blank Page Front Panel LED Status Indicators for DAS There is resetInterface for DAS changes Section LED State DAS Structure DAS ChannelsChannels Property Description Default Setting Range Channel Default DAS ChannelsEnabled CAL Hold OFF Settings Teledyne Analytical Instruments 167 DAS View Touchscreen Functions Button Viewing DAS Data and Settings NXCNC1 ATIMER, 5 Translates to the following configurationName NXCNC1 Trigger Event Atimer Editing DAS Data Channels Teledyne Analytical Instruments 170 Manual DAS Data Parameter Functions Changed during data acquisition Teledyne Analytical Instruments 173 AVG, SDEV, MIN or MAX sample modes see .1.3.3, Stored and reported to the Comm portsReport period Report Periods in Progress when Instrument Is Powered Off Editing the Number of Records Teledyne Analytical Instruments 177 ON/OFF Holdoff Feature Teledyne Analytical Instruments 179 Disabling/Enabling Data Channels Starting Date Feature DAS Configuration VIA Apicom Remote DAS Configuration Teledyne Analytical Instruments 182 DAS Configuration VIA Terminal Emulation Programs Whereas the editing, adding and deleting of DAS channelsAdvised before attempting any DAS changes Teledyne Analytical Instruments 184 Interactive Mode Computer ModeRemote Control VIA Apicom Remote Control VIA a Terminal Emulation Program Terminal Mode Software Commands Command SyntaxCommand Command Type Where Data Types Status ReportingGeneral Message Format Remote Access by Modem Model 9110T NOx Analyzer Remote OperationAT Y0 D0 H0 I0 S0=0 To initialize the modem press Remote Access by Modem Teledyne Analytical Instruments 190 Where N is any numeral between 0 Password Security for Serial Remote Communications Teledyne Analytical Instruments 192 Calibration Quality Analysis Model 9110TH NOx Analyzer Calibration Procedures Model 9110T NOx Analyzer Calibration Procedures Before CalibrationRequired EQUIPMENT, SUPPLIES, and Expendables Zero Air Calibration GasesSpan Gas Example Span Gas for Multipoint Calibration Data Recording Devices2.4. NO2 Permeation Tubes Measured medium as closely as possible ZERO/SPAN Calibration Checks VS. ZERO/SPAN Calibration 4. NO2 Conversion Efficiency CE Teledyne Analytical Instruments 198 Performing a Basic Manual Calibration Check See for troubleshooting tipsPerforming a Basic Manual Calibration Outside the allowable range for a reliable calibration Entered properly in the conversion efficiency setting Setting the Expected Span Gas Concentration For troubleshooting tips As a calibration source Manual Calibration with the Internal Span GAS Generator Setup for Calibration with the Internal Span GAS Generator CAL on NO2 FeatureCheck is performed Teledyne Analytical Instruments 204 Troubleshooting tips Teledyne Analytical Instruments 206 Teledyne Analytical Instruments 207 Calibration. See for troubleshooting tips Setup for Calibration Using Valve Options Sample TST TST CAL Cals Setup Manual Calibration Checks with Valve Options Installed Manual Calibration Using Valve Options Teledyne Analytical Instruments 212 Disabled Mode Name ActionAutomatic ZERO/SPAN CAL/CHECK Autocal Autocal Modes For US EPA controlled/related applications AutoCal Attribute Setup ParametersAlways be set to OFF Analyzer’s sample port 100 AM Sept15.0 0030 To program the example sequence shown in -4, press Setup  Acal Programming and Auto CAL Sequence Teledyne Analytical Instruments 217 Entr button will disappear from the display No Offs No Slope NOX Offs NOX Slope Calibration Quality Analysis GAS Flow Calibration Separate flow meter is required for this procedure Model 9110T NOx Analyzer EPA Protocol Calibration Calibration General Guidelines Spare Parts and Expendable Supplies Calibration EQUIPMENT, SUPPLIES, and Expendables Calibration GAS and Zero AIR Sources Calibration FrequencyData Recording Device Record Keeping Definition of Level 1 and Level 2 Zero and Span Checks Level 1 Calibrations Versus Level 2 Checks GPT Calibrator Check Procedure GAS Phase Titration GPTGPT Principle of Operation Equation ≤ 2min Have to be made, and TR and PR will have to be recalculated Example GPT Calculation GPT Multipoint Calibration Procedure Conditions of use against a reliable standardHandbook, Vol. II, Part 1, Appendix GPT Calibration System SET UP for GPT Multipoint Calibration of the 9110T Span Calibration Zero Calibration GPT NO2 Check See the Troubleshooting if there are problems Summary of Quality Assurance Checks Other Quality Assurance Procedures Short Calibration Checks ZERO/SPAN Check Procedures Precision Check Procedure Certification of Working StandardsPrecision Check References Certification Procedures of Working StandardsOther Methods of Establishing Traceability Standard Teledyne Analytical Instruments 236 Part Maintenance and Service Teledyne Analytical Instruments 238 Model 9110T NOx Analyzer Instrument Maintenance Maintenance Schedule CAL Date Performed Action Freq Check REQ’D 9110T Maintenance Schedule Maintenance Procedures Predictive DiagnosticsPredictive Uses for Test Functions Function Expected Actual Interpretation & Action Replacing the Particulate Filter Replacing the Sample Particulate Filter Changing the O3 Dryer Particulate Filter Risk of causing a significant leakEnsure to use proper wrenches Turn against the Perma Pure dryer Changing the Ozone Cleanser Chemical Teledyne Analytical Instruments 245 Offsets, which may take 2-3 weeks to disappear Changing the Pump DFU Filter Maintaining the External Sample Pump Pump PackRebuilding the Pump Replacing the Scrubber Procedure for Replacing Filters on Internal Pumps Procedure for Replacing Filters on External Pumps Room temperature and will contaminate the entire instrument Changing the Internal Span GAS Generator Permeation TubeChanging the External Zero AIR Scrubber OPT 86C Teledyne Analytical Instruments 250 Changing the External Scrubber’s DFU Filter Zero Air Scrubber Assembly HOT Surface Hazard Changing the NO2 Converter Teledyne Analytical Instruments 253 Cleaning the Reaction Cell Teledyne Analytical Instruments 255 Replacing Critical Flow Orifices To clean or replace a critical flow orifice From the vacuum port to get the parts out of the manifold Checking for Light Leaks Assembly Checking for Pneumatic LeaksSimple Vacuum Leak and Pump Check Surfaces Detailed Pressure Leak Check Performing a Sample Flow Check InstrumentThis value is only calculated, not measured Model 9110T NOx Analyzer Troubleshooting & Service General Troubleshooting Fault Diagnosis with Warning Messages Teledyne Analytical Instruments 263 Front Panel Warning Messages XXX.X MVOzone Flow Teledyne Analytical Instruments 265 OUT of Range reading Fault Diagnosis with Test FunctionsPressure Can also cause changes in the absolute atmospheric pressure Indicated Failures Diag  Signal I/O Using the Diagnostic Signal I/O Function Under this menu These signals upon exit Test Channel Outputs as Diagnostic Tools Using the Analog Output Test Channel CPU Status Indicator Using the Internal Electronic Status LedsRelay PCA Status Leds 12.3.2.1. I2C Bus Watchdog Status LEDs D10 Green NO/NOx Valve D9 Green AutoZero Valve LED Color Function Fault Indicated Failures Status LED ROWD1 RED Relay PCA Status LED Failure Indications Zero or LOW Flow Problems GAS Flow ProblemsSample Flow is Zero or Low About 1 in-Hg per 300 m / 1000 ft Ozone Flow is Zero or Low Check pressures High Flow Check if the particle filter is clogged Sample Flow is Zero or Low but Analyzer Reports Correct Flow Negative Concentrations Calibration Problems Unstable Zero and Span No Response Inability to Zero no Zero Button Calz Inability to Span no Span Button Cals NON-LINEAR Response Discrepancy Between no and NOX Slopes Discrepancy Between Analog Output and Display Other Performance Problems Excessive NoiseSlow Response Dirty reaction cell can cause high Auto Zero values Auto Zero Warnings AC Main Power DC Power SupplySubsystem Checkout DC Power Test Point and Wiring Color Codes DC Power Supply Acceptable LevelsFrom Motherboard LCD/DISPLAY ModuleTest Channel / Analog Outputs Voltage Touchscreen Interface Analog Output Test Function Nominal Values Voltage Outputs 12.7.6.2. A/D FunctionsFull Scale Output of Voltage Range Step Nominal Output Voltage Status Outputs To test the status output electronicsOzoneflow 10 Status Outputs Check Control Inputs Pressure / Flow Sensor Assembly Basic PCA Operation CheckSample Pressure Sensor Check RS-232 Communications General RS-232 TroubleshootingVacuum Pressure Sensor Check 12.7.7.4. O3 Flow Sensor Check RS-232 Programming Notes TAI P/N Troubleshooting Analyzer/Modem or Terminal Operation Doubt, consult the factory 12.7.10.1. NO2  no Converter Electrical System Calculating / Checking Converter Efficiency Teledyne Analytical Instruments 294 Step Evaluating NO2  no Converter Performance Simplified GPT Calibration Concentration must be used must be 440 ppb or more There must be a minimum of 10% more no than O3 produced Teledyne Analytical Instruments 298 NOx Loss OUT-GASSING no NOX Photomultiplier Tube PMT Sensor Module Optic TestTo activate the optics test, press To activate the electrical test, press PMT Preamplifier Board High Voltage Power Supply PMT Temperature Control PCA 12.7.15.1. O3 Generator Override 12.7.15. O3 Generator Exit the menu Internal Span GAS Generator and Valve Options Temperature Sensor Box Temperature SensorPMT Temperature Sensor Control Teledyne Analytical Instruments 307 DISK-ON-MODULE Replacement Procedure Service ProceduresProcedures. Contact Teledyne Customer Service Department Expendables are discussed in Instrument Maintenance 12.8.2. O3 Generator Replacement Sample and Ozone Perma Pure Dryer ReplacementAnalyzer has warmed up for about 60 minutes To calibrate the PMT preamplifier PCA PMT Sensor Hardware Calibration Teledyne Analytical Instruments 311 Replacing the PMT, Hvps or TEC Between measure and Auto Zero modesQualified Personnel 9110T Sensor Assembly Ensure to replace the 5 desiccant bags inside the housing Teledyne Analytical Instruments 314 10 Relay PCA with AC Relay Retainer In Place Removing / Replacing the Relay PCA from the Instrument Frequently Asked Questions QuestionAnswer Teledyne Analytical Instruments 317 Analytical Instruments Technical Assistance Measurement Principle Chemiluminescence Creation in the 9110T Reaction CellModel 9110T NOx Analyzer Principles of Operation Photo Multiplier Tube PMT Chemiluminescence Detection in the 9110T Reaction CellOptical Filter NO2* →NO2 + hν1200nm Tensit NOX and NO2 Determination XNO2 + yMo→ xNO + MyOz at 315C Direct Interference Measurement Interferences Light Leaks Reaction Cell Temperature Control List of InterferentsGas Interference Type Rejection Method Sample GAS Flow Pneumatic OperationBoth leak tight and not pressurized over ambient pressure Zero a perfect vacuum Teledyne Analytical Instruments 327 Basic Internal Gas Flow for Basic 9110T with Internal Pump Vacuum Manifold 9110T Valve Cycle Phases Sample Gas Flow Valves and RoutingNO/ no Critical Flow Orifice Flow Rate Control Critical Flow Orifices Teledyne Analytical Instruments 331 Maintained at a constant temperature Ozone GAS Generation and AIR FlowO3 Generator 10 Ozone Generator Principle Ozone Generator Dry Air Supply Teledyne Analytical Instruments 334 Ozone Supply Air Filter Pneumatic SensorsOzone Destruct Down, the generator is turned on immediately Vacuum Pressure Sensor Sample Pressure SensorSample Gas Flow Calculation Samplepressure 13.2.4.4. O3 Supply Air Flow Sensor Electronic Operation 13 9110T Electronic Block Diagram Teledyne Analytical Instruments 339 Flash Chip Disk-On-Module Sensor Inputs Thermistor Interface External Digital I/O Analog OutputsMotherboard see Section Reported nor stored To their normal value/setting Only until signal I/O menu is exitedInternal Digital I/O 13.3.3.7. I2C Data Bus Electrical Shock Hazard 15 Relay PCA Layout P/N 16 Relay PCA P/N 045230100 with AC Relay Retainer in Place Status LED’s Relay PCA Status LED’s Color Function Status When Lit Status When Unlit Watchdog Circuitry Valve ControlYellow no 2  no Converter Heater Teledyne Analytical Instruments 349 TC1 TC2 Sensor MODULE, Reaction CellNot Used TC1 Photo Multiplier Tube PMT 20 9110T Sensor Module Assembly PMT preamplifier board provides a variety of functions PMT Preamplifier Principles of Operation 22 PMT Preamp Block Diagram 23 Typical Thermo-Electric Cooler PMT Cooling System TEC Control Board Pneumatic Sensor BoardPMT Preamp All AC and DC Voltages are distributed via the relay PCA Power SUPPLY/CIRCUIT Breaker Sensor Module AC Power ConfigurationHvps PMT Logic Devices Configuration Jumpers for Optional AC Heaters Pump ConfigurationConfiguration Jumpers For AC Heaters AC Power Configuration for Internal Pumps JP7 Power Configuration for Standard AC Heaters JP2 AC Configuration Heaters for Option Packages JP6VAC /115 VAC VAC / 240 VAC White Jumper Heaters Between Function Color Pins Power Configuration for Optional Heaters JP6RED IZS Front Panel TOUCHSCREEN/DISPLAY Interface 30 Front Panel and Display Interface Block Diagram Software Operation Lvds Transmitter BoardFront Panel TOUCHSCREEN/DISPLAY Interface PCA TEMPERATURE/PRESSURE Compensation TPC Adaptive FilterCalibration Slope and Offset Teledyne Analytical Instruments 366 Model 9110T NOx Analyzer Primer on ESD HOW Static Charges are CreatedStatic Generation Voltages for Typical Activities Means of Generation Potentially damaging electro-static discharges can occur HOW ELECTRO-STATIC Charges Cause DamageSensitivity of Electronic Devices to Damage by ESD Damage Susceptibility Voltage Common Myths about ESD Damage Basic Principles of Static ControlGeneral Rules Teledyne Analytical Instruments 370 Working AT AN ANTI-ESD Work Bench Working AT the Instrument Rack Transferring Components Between Rack and Bench Opening Shipments from TAI Customer Service ESD Hazard Packing Components for Return to TAI Customer Service Teledyne Analytical Instruments 374 Glossary Model 9110T NOx Analyzer GlossaryTerm Description/Definition Teledyne Analytical Instruments 376 Teledyne Analytical Instruments 377 Teledyne Analytical Instruments 378