Electronic Signal Processing, Display and Control | Teledyne 6750

Theory of Operation	Model 6750

requires no wall reflectivity and is completely resistant to corrosive gases. The NDIR unit requires no optical chopper motor or mechanical devices but utilizes a single flashing infrared source to optically “chop” the infrared (IR) beam, which equally irradiates CO2/reference detectors. Using a reference eliminates water vapor interference. The non- reflective, corrosive resistant sample cell removes the requirement for chemically removing acid gases prior to detection.

Automatic gain control (AGC) is employed during the reference/sample cycle to compensate for such factors as IR source deterioration, dirty optical windows, etc. When the AGC level reaches a predetermined threshold, an optics alarm is activated. Malfunctions of major NDIR components are detected and indicated as an alarm, providing “fail-safe” operation. Signal detection is completely synchronous and because of the differential ratioing technique, drift is virtually eliminated.

All critical optics are protected by sapphire windows. The NDIR optical bench can be easily disassembled and windows cleaned (rarely ever required) and reassembled within fifteen (15) minutes, without realignment or the use of any tools.

The benefit of this absolute measuring, dual line spectral differential analytical technique, is that it provides simple, direct measurement of all CO2 contributing factors (including background) for a true and accurate calibration, and precisely offsets these effects for very accurate TOC determinations.

2.4.5 Electronic Signal Processing, Display and Control

A true, industrialized Microsoft Windows™-CE Computer offers complete automatic control of the analyzer, including the following:

•Benchmark/Auto-Validation

•Auto-Calibration

•Auto-Cleaning

•On-Board Historical Data for up to one (1) year

•Paperless Chart Recorder

•Diagnostics

•Networking (RS-232C/485)

Teledyne Analytical Instruments

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Teledyne 6750 operating instructions Electronic Signal Processing, Display and Control

Contents

Model Teledyne Analytical Instruments Model Copyright 2005 Teledyne Instruments/ Analytical Instruments Specific Model Information Total Organic Carbon Analyzer Safety Messages Total Organic Carbon Analyzer Table of Contents Setup and Operation Maintenance Appendix Index Teledyne Analytical Instruments List of Figures Model 6750 TOC Analyzer Front door removed DC Power Supply Module List of Tables Combustible GAS Usage Main Features of the Analyzer IntroductionTotal Organic Carbon Analyzer Introduction Intended Use of the Analyzer OptionsTypical Applications Introduction Model Operator Interface Model 6750 TOC Analyzer Front door removed Introduction Model Teledyne Analytical Instruments Background Theory of OperationOverview Total Organic Carbon Analyzer Theory of Operation Theory of Operation Model Npoc or TOC Direct Method Conclusion TOC Measurement Basics UV/Heated Persulfate Method of Analysis Comparison of TOC Measurement Technologies Subsystems Principles of Operation Sample Handling Sample Handling for TOC -Direct Sample Handling TOC-True TOC analysis in a continuous, on-line TOC analyzer Inorganic Carbon Removal/Analysis Relationship Between TIC and pH Oxidation Oxidation Reactions Ndir CO2 Gas Detection 10 Model 6750 Ndir Unit Electronic Signal Processing, Display and Control BENCHMARK/AUTO-VALIDATION Theory of Operation Model Teledyne Analytical Instruments Unpacking the Analyzer InstallationTotal Organic Carbon Analyzer Installation Mounting the Analyzer Installation Model Analyzer Dimensions Power Connection Electrical Connections Analog Outputs Electrical Connections to the Model 4 RS-232 Serial Connection Alarm ConnectionsGas/liquid Connections Liquid Connections Gas and Liquid Connections to the Analyzer Gas Connections Checking the System Gas Carrier Connections Installation Model Teledyne Analytical Instruments Setup and Operation Total Organic Carbon Analyzer Setup and OperationAnalyzer Startup Setup and Operation Model Drain Connections Run Mode Menus Parameter Menu Alarm Settings Stream Sequencer 5 D/DBPR Detailed Calibration Procedures Methanol 100 mg/Liter 1000 mg/LiterEthylene Glycol Ethanol Preparation of Phosphoric Acid Solution Total Organic Carbon Analyzer Setup and Operation Operation RUN Screen Shutdown Historical Data Setup and Operation Model Maintenance Compupter-aided TestingTotal Organic Carbon Analyzer Maintenance Troubleshooting Maintenance Model Module Service Ndir Gas Calibration IR Calibration Installing Calibration Adapter Ndir Service Removing the Ndir Unit P/N ST36000 Total Organic Carbon Analyzer Maintenance Maintenance Model To Reassemble Use alternate tightening sequence Master Interface Board P/N ST13042-1 Removing the Master Interface Board 4 D. C. Power Supply DC Power Supply Module CE Computer P/N Replacing CE Computer UV Lamp Replacement UV Lamp P/N ST20009 UV Reactor Assembly P/N ST20003-1 Removing the UV Reactor Assembly UV Power Supply 10 Removing the UV Power Supply Mass Flow Controller P/N ST18001A 11 Mass Flow Controller Metering Valve P/N ST16050 12 Metering Valve Sparger P/N ST20025 13 Sparger Pumps Maintenance Model 14 Removing the Pump Maintenance Model 13 4-20 mA Adjustment Procedure System Diagnostics Setting 100 MV Control Voltage 1Specifications AppendixTotal Organic Carbon Analyzer Appendix Appendix Model Sample requirements Parts Listing Description Image Appendix Model Total Organic Carbon Analyzer Appendix Appendix Model Total Organic Carbon Analyzer Appendix Option Auto CAL True Dual Range Option not an electronic scaling Dbpr Option Appendix Model AS-BUILT Drawings Appendix Model Teledyne Analytical Instruments Index Total Organic Carbon Analyzer Index Index Model Modbus Pump mounting screw Index Model