Setup of the Logarithmic Amplifier | Teledyne 6600 specification

3 Maintenance		Model 6600

b.If the measuring peak is equal to or within 1 volt of thereference peak, the system is optically balanced and ready for calibration.

c.If the peak is still too short, repeat the procedure, but thistime put a screen behind the measuring filter to shorten its peak.

7.After the peaks are balanced, adjust the gain control until the tallest of the two peaks is 8 to 9 volts. The peaks should still be within1 volt of each other.

8.It is always good practice to operate the analyzer with as low a gain as possible. Therefore, with the gain control just barely off its stop, once again remove or add screens in the light path to obtain as high a voltage as possible without exceeding 9 volts for the highest peak. Read-just gain for 8 to 9 volts.

This concludes the balancing procedure and the instrument is ready for calibration.

3.5.6 Setup of the Logarithmic Amplifier

The amplifier is inverting and continuously taking the logarithm of the output signal of the second amplifier. You can observe the output by connecting the scope probe to TP4.

The correct wave shape has a rounded negative going pulse that is the signal and a flat-topped positive pulse that depicts saturation of the log amplifier.

You should not permit distortions or oscillations in the rounded peaks.

When the positive going pulse is not flat or is distorted, adjust trimpot R3 only enough to obtain a flat positive pulse. If you over adjust, you may lose part of the second decade of absorption and affect the accuracy of analysis for high concentrations of the component of interest where the measuring pulse can become very short. The log amplifier saturates because the amplifier is incapable of taking the logarithm of the slightly negative baseline.

3.5.7 Inverting Amplifier

The amplifier is inverting and has a gain of 1. It inverts the output signal of the logarithmic amplifier and acts as a buffer between the logarithmic amplifier and the reed switch and integrators. To observe the output of the inverter, connect the scope probe to TP5. The wave must be a duplicateof that observed on TP4, except that it is inverted.

3-6

Part II

Teledyne Analytical Instruments

Image 82

Teledyne 6600 manual Setup of the Logarithmic Amplifier, Inverting Amplifier

Contents

Oil in Water Analyzer Teledyne Analytical Instruments Model Copyright 1999 Teledyne Analytical Instruments Table of Contents Iii Model Teledyne Analytical Instruments Model Part I Control Section Ii Part InstallationOperation Part I MaintenanceAppendix Iv Part Model 6600 Oil in Water Analyzer Overview Oil in Water Analyzer Part I Control Section Operator Interface Main Features of the AnalyzerIntroduction Model ESCAPE/ENTER Switch Model 6600 Controls, Indicators, and Connectors Model 6600 Interface Panel Control Section Interface Panel Unpacking the Control/Analysis Unit Electrical Connections Installation Model 115VAC Examples Analog Output Connections 10.4 Alarm Relays Range Voltage Current mA Part RS-232 Sig RS-232 Pin Purpose Data Carrier Detect Command Description Parameter Setting Testing the System Part Introduction Using the ControlsOil in Water Analyzer Operation Operation Model Mode/Function Selection Hierarchy of System Functions and Subfunctions System Function Setting up an AUTO-CAL Password Protection EnteringthePassword Installing or Changing the Password Logging Out System Self-Diagnostic Test Operation Model Model Screen Checking Linearity with Algorithm Digital Filter Setup Setting 90% Response time Seconds Homogenizer Function Setup Set Ultra Sonic Homogenizer on Hold/Track Setup Operation Model Calibration/Hold Timer Setup Analog 4-20mA Output Calibartion Algorithm Application Model Outcal Anlz Manual control of filter and solenoids Zero and Span Functions Algorithmapplcation Model Outcal Anlz Auto Mode Zeroing Zero Cal Manual Mode Zeroing Detector Failure Zero Offset Calibration How the offset value is selected Spanning Manual Mode Spanning Auto Mode SpanningOil in Water Analyzer Operation Span Cal Alarms Function Oil in Water Analyzer Operation Range Select Function Auto Screen Precautions Analyze Function Illustrates these schemes graphically Programming Oil in Water Analyzer Operation Set Range Screen Curve Algorithm Screen Auto Mode Linearization Ppm SO2 InputØ Fuse Replacement Part I Control Section Maintenance Power System Self Diagnostic TestMaintenance Model 6600 Oil in Water Analyzer Analog Preamp Major Internal ComponentsDetector Side View Open Door Part II Analysis Section Control/Analysis Unit Part II Analysis Unit Ii Part Part II Iv Part Method of Analysis Oil in Water Analyzer Operational Theory Optical Bench Operational Theory Model Photometer Amplifier Automatic Zero System System Description Zero drift may occur in the following cases Photometer Source Module Sample Cell Detector Module Sample Systems Oil in Water Analyzer Part II Analysis Unit Installing and Connecting the AnalyzerUnpacking the Analyzer User Connections Compressed Air Supply Installation Model Electrical Power ConnectionsSignal and Alarm Output Connections Pipe Connections Calibration Calibration Fluids Calibration Method One System Visual Check and Response Procedure Routine MaintenanceOil in Water Analyzer Maintenance Automatic operation and routine operational duties Routine Maintenance Maintenance ModelSuggested Preventive Maintenance Schedule Power Supply Test Points Service Procedures and Adjustments ElectronicsSetup of the Signal Processing Front-End Amplifiers Oscilloscope Display of the I to E Converter Output Part Setup of the Logarithmic Amplifier Inverting Amplifier Battery-Powered Oscilloscope Synchronization Point Interface Board Terminals Strip Part Oil in Water Analyzer Maintenance Part Part III Part III Oil in Water Model 6620 Oil in Water Analyzer Table of Contents Part III Model 6620 Oil in Water Analyzer Introduction Oil in Water Part Photometer Amplifier Method of AnalysisOptical Bench Part Model Part III From B71046-0 or customer’s piping schematic Automatic Zero System Oil in Water Piping Diagram B71046 Part Part III System Description Source Module PhotometerSample Cell Control/Analysis Unit Detector ModulePart III Teledyne Analytical Instruments Electrical Connections Sampling System Sample Water Preconditioning System Pressurized Inlet Sample Delivery Homogenizing Zero Water Preconditioning System Automatic Sample Cell Cleaning System Ultra clean process applications for leaks into the like Entering the zero offset Signal Outputs Recorder Requirement Amplifier PCB Process Alarm SystemAuto Zero Circuit Signal Failure Alarm Detector Fail Check Detector signal Installation User Connections Electrical Power ConnectionsSignal and Alarm Output Connections Compressed Air Supply Sample Delivery System Safe Vent Drainage Installation Check Electronics Check Sample Delivery Check Electrical CheckPreparation for Calibration Required Calibration Equipment Manual Sample Introduction Acquisition of Representative Oil Sample Acquisition of Representative Sample Water Background Signal Level Determination Oscilloscope Display of the I to E Converter Output Part III Part Model Zero Fluid Preparation Calibration with Prepared SampleSpan Fluid Preparation Calibration Setup of Internal Span Flag Calibration SpanFilter Calibration by Correlation with Laboratory AnalysisSample System Part III Calibration of the ultrasonic homogenizer HomogenizerTuning Correlation Electronics Set-up for Automatic Operation Automatic Operation and Routine Operational Duties System Visual Check and Response Procedure Routine Maintenance Daily Monthly or 6 weeks maximum Service Procedures and Adjustments Set up of the Signal Processing Front End Amplifiers Set Up of the I to E Converter Integrated Reference and Measuring Signals Set Up of the Logarithmic AmplifierInverting Amplifier Sample Cell Maintenance Sample System Maintenance Zero Filter Replacement 316 Zero Filter Cleaning Procedure Lamp Replacement Phototube Replacement Troubleshooting Section Lamp Refuses to Light Zero Drift Problems Sample Pump Failure Site requirements Installation Part Model Sample Connections Drawings Start up of System Allow warm-up for 1 hour Set up for Automatic Sampling Sample System Automatic Operation and Routine Duties Oil in Water Part Teledyne Analytical Instruments Operating Temperature 0-50oC SpecificationsOil in Water Analyzer Appendix Appendix Models Recommended 2-Year Spare Parts List QtyP/NDescription Drawing List See manual addendum Generic Drawing List