Teledyne 7300A manual Linearizer

Page 33

Infrared Gas Analyzer

Start-up and Operation

 

 

 

 

 

 

 

 

 

The CPU also provides appropriate control signals to the Displays, Alarms, and External Valve Controls, and accepts digital inputs for external Remote Zero and Remote Span commands. It monitors the power supply through an analog to digital converter as part of the data for the system failure alarm it performs timing and linearizing tasks too.

The RS-232 port provides two-way serial digital communications to and from the CPU. These, and all of the above electrical interface signals are described in detail in chapter 3 Installation.

3.6Linearizer

The output of the NDIR analyzer bench is non-linear (this is due to the effect known as “Beers Law”). Figure I shows this non-linear response.

NDIR Bench Output

Figure I

In order to produce a

Gas Concentration

response, a compensation curve is

required (see Figure

a linearizer software routine is included

to create a linear response. Refer to section 4.3.7 and 4.8.2 to see how

linearizer is programmed.

Teledyne Analytical Instruments

3-7

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Contents Teledyne Analytical Instruments Model 7300ACopyright 2000 Teledyne Analytical Instruments Model 7300AApplication Impurity of Interest Infrared Gas Analyzer Technician Record SheetModel 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 Appendix MaintenanceOverview 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 Electrical Power Connections Installation Model 7300AUser Connections Calibration GasesElectrical Connections Rear Panel Infrared Gas Analyzer Installation Pipe ConnectionsSample Delivery System Venting the SystemFuse Installation Installation Model 7300A Primary Input Power3 50-Pin Equipment Interface Connector Analog OutputsPin Function ExamplesOutput V dc Output mA dc Range Voltage Current mA Application Alarm RelaysDigital Remote Cal Inputs Pin ContactRemote Calibration Connections Remote Valve Connector Range ID RelaysNetwork I/O FET Series Resistance 4 RS-232 PortCommand Description Parameter SettingGas Requirements Testing the System Calibration Calibration FluidsCalibration Infrared Gas Analyzer Installation Installation Model 7300A Teledyne Analytical Instruments Ndir Analyzer Startup PreliminaryInitial Set-up and Zeroing Infrared Gas Analyzer Start-up and OperationStart-up and Theory of Operation Model 7300A Operational CalibrationAnalyzer Theory of operation GeneralBlock Diagram of the Model 7300A Electronics Circuit Description Digital Signal Processing & Electronics Linearizer Linearizer Output Linearizer Input Teledyne Analytical Instruments Page Infrared Gas Analyzer Operation IntroductionAnalysis Mode Using the ControlsOperation Model 7300A Mode/Function SelectionSetup Mode Setup Mode Data Entry EnterEscape Enter Setting up an AUTO-CALEntering the Password Infrared Gas Analyzer Operation Password ProtectionAAA Installing or Changing the PasswordLogging Out System Self-Diagnostic TestChecking Linearity with Algorithm Model ScreenTroubleshooting information Digital Filter Setup Zero Offset Adjustment CAL-OUT Function Adjst output to 4ma ENT to OK Zero Cal Zero and Span FunctionsAuto Mode Zeroing Cell Failure Manual Mode ZeroingSpan Cal Auto Mode SpanningManual Mode Spanning Installation Alarms FunctionPress enter again to set the alarm setpoints Manual Select/Define Range Screen Range Select FunctionAuto Screen Precautions Illustrates these schemes graphically Analyze FunctionSet Application Screen ProgrammingOFFST/INVRT ENT Checking the linearization Curve Algorithm ScreenManual Mode Linearization Auto Mode Linearization Offset OUTPUT/Reversal Output Output Signal Reversal Special Function SetupPolarity Reversal Output Signal OffsetGain Preset Infrared Gas Analyzer Maintenance MaintenanceRoutine Maintenance Maintenance Model 7300AFilter Ndir Analyzer Measurement Cell System Self Diagnostic TestMajor Internal Components PowerAnalog 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 Qty Description Recommended 2-Year Spare Parts ListAttachment 7300A Infrared Gas Analyzer Appendix