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Teledyne 6750 operating instructions Theory of Operation, Overview, Background

Models: 6750

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Theory of Operation

Total Organic Carbon Analyzer	Theory of Operation

Theory of Operation

2.1 Overview

The Model 6750 Analyzer uses the UV/Heated Persulfate method of analysis and is well-suited for many applications involving accurate TOC analysis. The basic analyzer is configured for maximum utility using an advanced Microsoft™ Windows-based CE computer with touch screen. The analyzer is suitable for both general purpose and/or hazardous area classifications, if properly configured with required safety equipment.

2.2 Background

TOC analysis is the primary screening tool and control parameter for all water based applications but there are some discrepancies or misunderstanding in just what TOC is comprised of.

Many manufacturers claim TOC analysis capability without disclosing the limitations of their methods. Some treat all “TOC analyzers” as a commodity, with no distinguishing characteristics among them. Analytical results reported by the user can therefore be questionable, unless the TOC method is matched to the analytical requirement.

The following discussion is intended to provide the user adequate information in order to allow intelligent cost/performance trade-offs and select the appropriate TOC method for each application. The Model 6750 TOC Analyzer performs the following analyses on the SAME sample:

•	TC:	Total Carbon
•	NPOC:	Non-Purgeable Organic Carbon
•	TIC:	Total Inorganic Carbon

•POC (VOC): Purgeable Organic Carbon or Volatile Organic Carbon

•TOC-True : Total Organic Carbon

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Teledyne 6750 operating instructions Theory of Operation, Overview, Background

Contents

OPERATING INSTRUCTIONS FOR DANGERModel Total Organic Carbon AnalyzerModel WarrantyTeledyne Analytical Instruments Important NoticeInstrument Serial Number: _______________________ Specific Model InformationTotal Organic Carbon Analyzer Teledyne Analytical InstrumentsNo Symbol Safety MessagesThis 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 Maintenance Setup and OperationTotal Organic Carbon Analyzer Teledyne Analytical InstrumentsAppendix ModelIndex 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 DANGER COMBUSTIBLE GAS USAGEIntroduction 1.1 Main Features of the Analyzer1.4 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 2-2:TOC – True Method Figure 2-1:NPOC or TOC – Direct MethodIn conclusion Figure 2-4:UV/Persulfate Method Figure 2-3 TOC Measurement BasicsTheory of Operation Model2.3 The UV/Heated Persulfate Method of Analysis Teledyne Analytical Instruments Theory of OperationModel 2.4.1 Sample Handling 2.4 Subsystems Principles of OperationFigure 2-6:Sample Handling for TOC -Direct 2.4.2.2GAS PHASE SAMPLE HANDLING Figure 2-7:Sample Handling TOC-True2.4.2Inorganic Carbon Removal/Analysis TOC analysis in a continuous, on-lineTOC analyzer2.4.3 Oxidation Figure 2-8:Relationship Between TIC and pHFigure 5-10shows UV oxidation methodology Figure 2-9:Oxidation ReactionsFigure 2-10:Model 6750 NDIR Unit 2.4.4 NDIR CO2 Gas Detection•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 Figure 3-2:Required Door Clearance Figure 3-1:Analyzer DimensionsInstallation Model3.3 Electrical Connections 3.3.1 Power ConnectionFigure 3-4:Electrical Connections to the Model 3.3.2 Analog Outputs3.4 Gas/liquid Connections 3.3.3 Alarm Connections3.3.4RS-232Serial Connection 3.4.1 Liquid Connections•Reagents •Drain s 3.4.2 Gas ConnectionsThe gas connections include •Sample Gas •Carrier Gas •VentNDIR Vent gas exhaust 3.5 Checking the SystemGas Carrier Connections Teledyne Analytical Instruments InstallationModel 4.1Analyzer Startup Setup and OperationI. water container Figure4-1:Drain Connections4.2.1 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 Total Organic Carbon Analyzer Table 4-1:Preparation of Standards TOC/TIC5. Acid Preparation b.Select TOC The following screen appears Figure 4-3:The RUN Screen 4.4 Operation4.6 Historical Data 4.5 ShutdownUsing the Scroll Bar, select the data to be viewed 5.1 Compupter-aidedTesting MaintenanceTable 5-1:Troubleshooting 5.2 Troubleshooting5.3.1NDIR Gas Calibration 5.3 Module ServiceIR Calibration Figure 5-1:Disconnecting Tubing from ReactorFigure 5-2:IR Calibration Adapter P/N ST20026 5.3.2 NDIR Service Figure 5-3 Installing Calibration AdapterTo Replace the NDIR Unit 1.Turn off power Figure 5-4:Removing the NDIR Unit P/N ST360002.Remove inlet tube from NDIR Assembly 3.Remove vent tube from NDIR AssemblySlide out and remove Source Assembly MaintenanceTotal Organic Carbon Analyzer Teledyne Analytical Instruments• Remove IR Cell Assembly MaintenanceModel Teledyne Analytical Instruments• Install Source Assembly end piece Install IR CellDetector Assembly left To Reassemblesqueeze nuts •Install insulation. Replace assembly as beforeRecommend Use alternate tightening sequenceFigure 5-5:Removing the Master Interface Board 5.3.3 Master Interface Board P/N ST13042-1Figure 5-6:DC Power Supply Module 5.3.4 D. C. Power SupplyFigure 5-7 Replacing CE Computer 5.3.5 CE Computer P/N5.3.6 UV Lamp P/N ST20009 Figure 5-8:UV Lamp ReplacementFigure 5-9:Removing the UV Reactor Assembly 5.3.7UV Reactor Assembly P/N ST20003-15.3.8UV Power Supply 5.3.9 Mass Flow Controller P/N ST18001A Figure 5-10:Removing the UV Power Supply5.3.10 Metering Valve P/N ST16050 Figure 5-11:Mass Flow Controller5.3.11 Sparger P/N ST20025 Figure 5-12:Metering ValveTo clean the sparger Figure 5-13:Sparger2.Reinstall sparger in reverse order 1.Turn machine OFF 2.Turn carrier gas Air/O2 OFF1. Turn main power OFF 5.3.12 Pumps5. Disconnect Pump Motor Connector MaintenanceModel Teledyne Analytical InstrumentsFigure 5-14:Removing the Pump 4.Hold tubing with thumb 5.3.134-20mA Adjustment Procedure Figure 5-15:Pump Head Tubing Replacement5.3.13.2SETTING OF 4-20 MA OUTPUT 5.3.13.1SETTING 100 MV CONTROL VOLTAGEPerformance A.1SpecificationsAppendix Facility requirements Sample requirementsPart # A.2 Parts ListingDescription ImageST15083 ST100006-1 Appendix AC Board AssemblyModel Teledyne Analytical InstrumentsST200003-1 A.3.1 Option A.3 OptionsA.3.2 Option A.3.3 OptionA.3.5 Option A.3.4 OptionA.3.6 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 Total Organic Carbon Analyzer A.4 AS-BUILTDrawingsAppendix Teledyne Analytical InstrumentsTeledyne Analytical Instruments AppendixModel Index enclosure, pump mounting screw, UV/Heated Persulfate Oxidation