Teledyne 7300A manual Auto Screen

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4 Operation

Model 7300A

 

 

 

 

 

 

 

 

 

Note: If all three ranges are currently defined for different applica- tion gases, then the above screen does not display (because mode must be manual). Instead, the VFD goes directly to the following screen.

If above screen displays, use the UP/DOWN arrow keys to Select MANU- AL, and press Enter.

Select range to run —> Ø1 Ø2 Ø3 CAL<—

Use the UP/DOWN keys to select the range: 01, 02, 03, or CAL. Then press Enter.

Gas use: CO2

Range: Ø — 10 %

Use the ENTER key to move the range to low-end field. Use ENTER key to move the range to high-end field. Use the UP/DOWN keys to change the values of the fields.

Press Escape to return to the previous screen to select or define another range.

Press Enter to return the to the Analyze function.

4.6.2 Auto Screen

Autoranging will automatically set to the application that has at least two range setup with the same gases.

In the autoranging mode, the microprocessor automatically responds to concentration changes by switching ranges for optimum readout sensitivity. If the upper limit of the operating range is reached, the instrument automatically shifts to the next higher range. If the concentration falls to below 85% of full scale of the next lower range, the instrument switches to the lower range. A correspond- ing shift in the DC concentration output, and in the range ID outputs, will be noticed.

The autoranging feature can be overridden so that analog output stays on a fixed range regardless of the contaminant concentration detected. If the concen- tration exceeds the upper limit of the range, the DC output will saturate at 1 V dc (20 mA at the current output).

However, the digital readout and the RS-232 output of the concentration are unaffected by the fixed range. They continue to read beyond the full-scale setting until amplifier saturation is reached. Below amplifier saturation, the over

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Teledyne Analytical Instruments

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Contents Model 7300A Teledyne Analytical InstrumentsModel 7300A Copyright 2000 Teledyne Analytical InstrumentsInfrared Gas Analyzer Technician Record Sheet Application Impurity of InterestModel 7300A Teledyne Analytical Instruments Model 7300A Table of Contents Introduction InstallationModel 7300A Infrared Gas Analyzer Table of Contents Start-up and Theory of OperationOperation Electrical/Control Unit Modes/Functioning Maintenance AppendixOverview Typical Gas ApplicationsInfrared Gas Analyzer Introduction Main Features of the Analyzer GeneralIntroduction Model 7300A Ndir Analyzer Introduction Model 7300A Teledyne Analytical Instruments Installing and Connecting the Analyzer Infrared Gas Analyzer InstallationUnpacking the Analyzer/Inspection Installation Model 7300A Electrical Power ConnectionsUser Connections Calibration GasesInfrared Gas Analyzer Installation Pipe Connections Electrical Connections Rear PanelSample Delivery System Venting the SystemInstallation Model 7300A Primary Input Power Fuse Installation3 50-Pin Equipment Interface Connector Analog OutputsPin Function ExamplesOutput V dc Output mA dc Alarm Relays Range Voltage Current mA ApplicationPin Contact Digital Remote Cal InputsRemote Calibration Connections Remote Valve Connector Range ID RelaysNetwork I/O 4 RS-232 Port FET Series ResistanceCommand Description Parameter SettingGas Requirements Testing the System Calibration Calibration FluidsCalibration Infrared Gas Analyzer Installation Installation Model 7300A Teledyne Analytical Instruments Preliminary Ndir Analyzer StartupInitial Set-up and Zeroing Infrared Gas Analyzer Start-up and OperationOperational Calibration Start-up and Theory of Operation Model 7300ATheory of operation General AnalyzerBlock Diagram of the Model 7300A Electronics Circuit Description Digital Signal Processing & Electronics Linearizer Linearizer Output Linearizer Input Teledyne Analytical Instruments Page Introduction Infrared Gas Analyzer OperationUsing the Controls Analysis ModeOperation Model 7300A Mode/Function SelectionSetup Mode Setup Mode Data Entry EnterEscape Setting up an AUTO-CAL EnterInfrared Gas Analyzer Operation Password Protection Entering the PasswordInstalling or Changing the Password AAASystem Self-Diagnostic Test Logging OutModel Screen Checking Linearity with AlgorithmTroubleshooting information Digital Filter Setup Zero Offset Adjustment CAL-OUT Function Adjst output to 4ma ENT to OK Zero and Span Functions Zero CalAuto Mode Zeroing Manual Mode Zeroing Cell FailureAuto Mode Spanning Span CalManual Mode Spanning Alarms Function InstallationPress enter again to set the alarm setpoints Range Select Function Manual Select/Define Range ScreenAuto Screen Precautions Analyze Function Illustrates these schemes graphicallyProgramming Set Application ScreenOFFST/INVRT ENT Curve Algorithm Screen Checking the linearizationManual Mode Linearization Auto Mode Linearization Special Function Setup Offset OUTPUT/Reversal Output Output Signal ReversalOutput Signal Offset Polarity ReversalGain Preset Maintenance Infrared Gas Analyzer MaintenanceRoutine Maintenance Maintenance Model 7300AFilter System Self Diagnostic Test Ndir Analyzer Measurement CellPower Major Internal ComponentsAnalog PreampCell Assembly Troubleshooting General Trouble Shooting Chart Maintenance Model 7300A Infrared Gas Analyzer Maintenance Maintenance Model 7300A Teledyne Analytical Instruments Infrared Gas Analyzer Appendix Specifications Drawing ListAppendix Model 7300A Recommended 2-Year Spare Parts List Qty DescriptionAttachment 7300A Infrared Gas Analyzer Appendix