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Teledyne 6750 operating instructions TOC analysis in a continuous, on-lineTOC analyzer

Models: 6750

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TOC analysis in a continuous, on-line TOC analyzer.

Theory of Operation	Model 6750

TOC analysis in a continuous, on-line TOC analyzer.

The CO2 generated by the oxidation of carbon in the reactor is read by the NDIR as a percentage concentration of the CO2 in the carrier gas.

CO2 (TOC)

CO2 (TOC) + Carrier

Any increase or decrease of the carrier flow rate will have a corresponding inverse effect on TOC reported value, (eg. double the carrier flow rate, reported TOC will approximate ½ of actual sample TOC concentration).

The Model 6750 uses a computer-controlled mass flow controller rather than a less accurate system consisting of pressure regulation with a flow meter in a capillary system.

The inorganic carbon removal system (sparger) flow rate is controlled by needle valves (V1 & V2) set at the factory. The operator will note bubbles through the liquids in the sparger, which is stripping the CO2 converted from the carbonates to eliminate the potential interference from inorganic carbon in TOC analysis.

The carrier gas directs the CO2 and other products of oxidation from the reactor to the Gas/Liquid Separator (GLS), where liquid waste is directed to drain and gases containing CO2 and other gaseous products of oxidation are directed to the CO2 specific NDIR. The CO2 concentration is directly related to sample TOC concentration and is reported accordingly.

2.4.2Inorganic Carbon Removal/Analysis

The choice of either TOC –Direct (NPOC) or TOC-True analysis involves a method of either measuring the TIC (for a TOC-True analysis) or not (for a Non-Purgeable TOC analysis only). The Model 6750 Analyzer can perform either method. The TOC-True method measures the inorganic carbon and is able to detect volatile organic loss in the sparger. The NPOC analysis ignores the volatile organics for a less precise NPOC analysis if organic volatiles are present.

The sparger used in the Model 6750 is a gas/liquid counter-flow stripper. Actual acid addition depends on the amount of sample buffering and pH. Factory set-up is for a nominal sample pH of 7.0, to

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Teledyne 6750 TOC analysis in a continuous, on-lineTOC analyzer, 2.4.2Inorganic Carbon Removal/Analysis

Contents

Model DANGEROPERATING INSTRUCTIONS FOR Total Organic Carbon AnalyzerTeledyne Analytical Instruments WarrantyModel Important NoticeTotal Organic Carbon Analyzer Specific Model InformationInstrument Serial Number: _______________________ Teledyne Analytical InstrumentsSafety Messages No SymbolThis manual provides information designed to guide you through the installation, calibration operation and maintenance of your new analyzer. Please read this manual and keep it available Table of Contents Total Organic Carbon Analyzer Setup and OperationMaintenance Teledyne Analytical InstrumentsIndex ModelAppendix Teledyne Analytical InstrumentsList of Figures Figure 5-6:DC Power Supply Module Table 4-1:Preparation of Standards TOC/TIC List of TablesTable 5-1 Troubleshooting COMBUSTIBLE GAS USAGE DANGER1.1 Main Features of the Analyzer Introduction1.4 Intended Use of the Analyzer 1.2Options1.3Typical Applications 1.5 Operator Interface Teledyne Analytical Instruments IntroductionModel 2.2 Background Theory of Operation2.1 Overview Figure 2-1:NPOC or TOC – Direct Method Figure 2-2:TOC – True MethodIn conclusion Theory of Operation Figure 2-3 TOC Measurement BasicsFigure 2-4:UV/Persulfate Method Model2.3 The UV/Heated Persulfate Method of Analysis Teledyne Analytical Instruments Theory of OperationModel 2.4 Subsystems Principles of Operation 2.4.1 Sample HandlingFigure 2-6:Sample Handling for TOC -Direct Figure 2-7:Sample Handling TOC-True 2.4.2.2GAS PHASE SAMPLE HANDLINGTOC analysis in a continuous, on-lineTOC analyzer 2.4.2Inorganic Carbon Removal/AnalysisFigure 2-8:Relationship Between TIC and pH 2.4.3 OxidationFigure 2-9:Oxidation Reactions Figure 5-10shows UV oxidation methodology2.4.4 NDIR CO2 Gas Detection Figure 2-10:Model 6750 NDIR Unit•Benchmark/Auto-Validation •Auto-Calibration 2.4.5.2AUTO-CALIBRATION 2.4.5.3AUTO-CLEANING2.4.5.1BENCHMARK/AUTO-VALIDATION Teledyne Analytical Instruments Theory of OperationModel 3.2 Mounting the Analyzer Installation3.1Unpacking the Analyzer Installation Figure 3-1:Analyzer DimensionsFigure 3-2:Required Door Clearance Model3.3.1 Power Connection 3.3 Electrical Connections3.3.2 Analog Outputs Figure 3-4:Electrical Connections to the Model3.3.4RS-232Serial Connection 3.3.3 Alarm Connections3.4 Gas/liquid Connections 3.4.1 Liquid ConnectionsThe gas connections include •Sample Gas 3.4.2 Gas Connections•Reagents •Drain s •Carrier Gas •VentNDIR Vent gas exhaust 3.5 Checking the SystemGas Carrier Connections Teledyne Analytical Instruments InstallationModel Setup and Operation 4.1Analyzer StartupFigure4-1:Drain Connections I. water container4.2.1 Run Mode 4.2 MenusFigure 4-2:Gas Liquid Separator D. I. Filling 4.2.2 Parameter Menu 4.2.3 Alarm Settings 4.2.4 Stream Sequencer 4.2.5 D/DBPR 4.3Detailed Calibration Procedures Table 4-1:Preparation of Standards TOC/TIC Total Organic Carbon Analyzer5. Acid Preparation b.Select TOC The following screen appears 4.4 Operation Figure 4-3:The RUN Screen4.5 Shutdown 4.6 Historical DataUsing the Scroll Bar, select the data to be viewed Maintenance 5.1 Compupter-aidedTesting5.2 Troubleshooting Table 5-1:Troubleshooting5.3 Module Service 5.3.1NDIR Gas CalibrationIR Calibration Figure 5-1:Disconnecting Tubing from ReactorFigure 5-2:IR Calibration Adapter P/N ST20026 Figure 5-3 Installing Calibration Adapter 5.3.2 NDIR Service2.Remove inlet tube from NDIR Assembly Figure 5-4:Removing the NDIR Unit P/N ST36000To Replace the NDIR Unit 1.Turn off power 3.Remove vent tube from NDIR AssemblyTotal Organic Carbon Analyzer MaintenanceSlide out and remove Source Assembly Teledyne Analytical InstrumentsModel Maintenance• Remove IR Cell Assembly Teledyne Analytical InstrumentsDetector Assembly left Install IR Cell• Install Source Assembly end piece To ReassembleRecommend •Install insulation. Replace assembly as beforesqueeze nuts Use alternate tightening sequence5.3.3 Master Interface Board P/N ST13042-1 Figure 5-5:Removing the Master Interface Board5.3.4 D. C. Power Supply Figure 5-6:DC Power Supply Module5.3.5 CE Computer P/N Figure 5-7 Replacing CE ComputerFigure 5-8:UV Lamp Replacement 5.3.6 UV Lamp P/N ST200095.3.7UV Reactor Assembly P/N ST20003-1 Figure 5-9:Removing the UV Reactor Assembly5.3.8UV Power Supply Figure 5-10:Removing the UV Power Supply 5.3.9 Mass Flow Controller P/N ST18001AFigure 5-11:Mass Flow Controller 5.3.10 Metering Valve P/N ST16050Figure 5-12:Metering Valve 5.3.11 Sparger P/N ST200252.Reinstall sparger in reverse order Figure 5-13:SpargerTo clean the sparger 1.Turn machine OFF 2.Turn carrier gas Air/O2 OFF5.3.12 Pumps 1. Turn main power OFFModel Maintenance5. Disconnect Pump Motor Connector Teledyne Analytical InstrumentsFigure 5-14:Removing the Pump 4.Hold tubing with thumb Figure 5-15:Pump Head Tubing Replacement 5.3.134-20mA Adjustment Procedure5.3.13.1SETTING 100 MV CONTROL VOLTAGE 5.3.13.2SETTING OF 4-20 MA OUTPUTPerformance A.1SpecificationsAppendix Sample requirements Facility requirementsDescription A.2 Parts ListingPart # ImageST15083 ST100006-1 Model AC Board AssemblyAppendix Teledyne Analytical InstrumentsST200003-1 A.3.2 Option A.3 OptionsA.3.1 Option A.3.3 OptionA.3.6 Option A.3.4 OptionA.3.5 Option A.3.7 OptionSince COD & BOD analysis may vary with seasonal influences or other particular conditions, correlations for those conditions would be used at those times Appendix A.4 AS-BUILTDrawingsTotal Organic Carbon Analyzer Teledyne Analytical InstrumentsTeledyne Analytical Instruments AppendixModel Index enclosure, pump mounting screw, UV/Heated Persulfate Oxidation