Teledyne 6750 operating instructions Benchmark/Auto-Validation

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Total Organic Carbon Analyzer	Theory of Operation

2.4.5.1BENCHMARK/AUTO-VALIDATION

Benchmark is the European NAMUR* specified validation technique, whereby on command a chemical calibration standard is automatically introduced to the analyzer and the response is compared to the previous analyzer calibration. If the response falls within a certain specified limit, the computer/output indicates “Benchmark Passed”. If the response falls outside specified performance limits, either a “Maintenance Request” or a “Fault” alarm is activated, depending on preset tolerances.

Thus, in cases of process spills, when the analyzer performance is questioned, Benchmark can rapidly and automatically validate analyzer performance. It eliminates time consuming and unnecessary recalibration cycles, which take the analyzer out of service just when it is most critically needed. Benchmark may be on-demand, or operator programmed for designated day and time activation on a repetitive basis.

On command (manual or automatic by selection of day/time), the combination of valves V3 and V4 divert the sample and introduce a liquid calibration solution to the analyzer. This is the same calibration solution used to previously calibrate the analyzer, “end-to-end”. If the TOC value from the calibration solution falls within a limit (generally set at 5% of the previous calibration), then “Benchmark Passed” will be displayed and remotely reported. If the TOC “Benchmark” solution falls outside the set tolerance, then a “Benchmark Failed” message and a “Maintenance Request” are reported.

2.4.5.2AUTO-CALIBRATION

On command (manual or automatic by selection of day/time), the combination of valves V3 and V4 alternately introduce D. I. water for a “Zero” calibration and the “Span” solution. The computer then resets the analyzer to the new calibration values.

2.4.5.3AUTO-CLEANING

On command (manual or automatic by selection of day/time), the combination of valves V3 and V4 operate to introduce a “cleaning” solution, depending on the chemical constituents of the sample. Acid or persulfate is generally used.

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Contents Teledyne Analytical Instruments ModelCopyright 2005 Teledyne Instruments/ Analytical Instruments ModelTotal Organic Carbon Analyzer Specific Model InformationSafety Messages Total Organic Carbon Analyzer Table of Contents Maintenance Setup and OperationIndex Teledyne Analytical Instruments AppendixModel 6750 TOC Analyzer Front door removed List of FiguresDC Power Supply Module List of Tables Combustible GAS Usage Introduction Main Features of the AnalyzerTotal Organic Carbon Analyzer Introduction Introduction Model OptionsTypical Applications Intended Use of the AnalyzerModel 6750 TOC Analyzer Front door removed Operator InterfaceIntroduction Model Teledyne Analytical Instruments Total Organic Carbon Analyzer Theory of Operation Theory of OperationOverview BackgroundNpoc or TOC Direct Method Theory of Operation ModelConclusion TOC Measurement Basics UV/Heated Persulfate Method of Analysis Comparison of TOC Measurement Technologies Sample Handling Subsystems Principles of OperationSample Handling for TOC -Direct Sample Handling TOC-True Inorganic Carbon Removal/Analysis TOC analysis in a continuous, on-line TOC analyzerOxidation Relationship Between TIC and pHOxidation Reactions 10 Model 6750 Ndir Unit Ndir CO2 Gas DetectionElectronic Signal Processing, Display and Control BENCHMARK/AUTO-VALIDATION Theory of Operation Model Teledyne Analytical Instruments Mounting the Analyzer InstallationTotal Organic Carbon Analyzer Installation Unpacking the AnalyzerAnalyzer Dimensions Installation ModelElectrical Connections Power ConnectionElectrical Connections to the Model Analog OutputsLiquid Connections Alarm ConnectionsGas/liquid Connections 4 RS-232 Serial ConnectionGas Connections Gas and Liquid Connections to the AnalyzerGas Carrier Connections Checking the SystemInstallation Model Teledyne Analytical Instruments Total Organic Carbon Analyzer Setup and Operation Setup and OperationAnalyzer Startup Drain Connections Setup and Operation ModelMenus Run ModeParameter Menu Alarm Settings Stream Sequencer 5 D/DBPR Detailed Calibration Procedures Ethanol 100 mg/Liter 1000 mg/LiterEthylene Glycol MethanolPreparation of Phosphoric Acid Solution Total Organic Carbon Analyzer Setup and Operation RUN Screen OperationHistorical Data ShutdownSetup and Operation Model Compupter-aided Testing MaintenanceTotal Organic Carbon Analyzer Maintenance Maintenance Model TroubleshootingNdir Gas Calibration Module ServiceIR Calibration Ndir Service Installing Calibration AdapterRemoving the Ndir Unit P/N ST36000 Total Organic Carbon Analyzer Maintenance Maintenance Model To Reassemble Use alternate tightening sequence Removing the Master Interface Board Master Interface Board P/N ST13042-1DC Power Supply Module 4 D. C. Power SupplyReplacing CE Computer CE Computer P/NUV Lamp P/N ST20009 UV Lamp ReplacementRemoving the UV Reactor Assembly UV Reactor Assembly P/N ST20003-1UV Power Supply Mass Flow Controller P/N ST18001A 10 Removing the UV Power SupplyMetering Valve P/N ST16050 11 Mass Flow ControllerSparger P/N ST20025 12 Metering Valve13 Sparger Pumps Maintenance Model 14 Removing the Pump Maintenance Model System Diagnostics 13 4-20 mA Adjustment ProcedureSetting 100 MV Control Voltage Appendix 1SpecificationsTotal Organic Carbon Analyzer Appendix Sample requirements Appendix ModelDescription Image Parts ListingAppendix Model Total Organic Carbon Analyzer Appendix Appendix Model Total Organic Carbon Analyzer Appendix Auto CAL OptionDbpr Option True Dual Range Option not an electronic scalingAppendix Model AS-BUILT Drawings Appendix Model Teledyne Analytical Instruments Total Organic Carbon Analyzer Index IndexModbus Index ModelPump mounting screw Index Model