Teledyne 3300ZB operating instructions Electronics, Effect of Pressure, General

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Operational Theory

Model 3300ZB

 

 

 

The sensor is designed for long term stability with an operating life of 5 years.

This unit features one or two sensors, and can be custom-designed for a specific range of oxygen analysis.

2.2.2 The Effect of Pressure

In order to state the amount of oxygen present in the sample as a specific portion of the gas mixture, it is necessary that the sample diffuse into the sensors under constant pressure.

If the total pressure increases, the rate that oxygen reaches the sensors will also increase. The electron transfer, and therefore the external current, will increase, even though the proportion of oxygen has not changed. It is therefore important that the sample pressure at the sensors, (usually vent pressure) remain relatively constant between calibrations.

2.3 Electronics

2.3.1 General

The signal processing uses a microcontroller with on-board RAM and ROM to control all signal processing, input/output, and display functions for the analyzer. System power is supplied from a universal power supply module designed to be compatible with most international power sources.

The power supply circuitry is on the Power Supply PCB, which is mounted vertically, just behind the rear panel of the control unit.

The signal processing electronics, which includes the signal amplifiers, microcontroller, analog to digital converter, and digital to analog converter, are located on the Main PCB. It is mounted vertically just behind the front panel of the control Unit.

Teledyne Analytical Instruments

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Contents Model 3300ZB Model 3300ZB Safety Messages Model 3300ZB Table of Contents Maintenance List of Figures Front PanelCombustible GAS Usage This page intentionally left blank Page Introduction Main Features of the AnalyzerOverview Front Panel Description Front PanelRear Panel Description ∙ Measurement Parameters Readout Power Connection Operational Theory IntroductionZirconium Oxide Sensors Principles of OperationEffect of Pressure ElectronicsGeneral Signal Processing Block Diagram of the Signal Processing ElectronicsOperational Theory Model 3300ZB Installation Unpacking the AnalyzerLocation and Mounting Control Unit InstallationElectrical Connections Rear Panel Electrical Connectors Contact ID for Failsafe Relay Operation Gas Connections Installation Checklist Piping DiagramFront Panel Controls and Indicators OperationUsing the Function and Data Entry Buttons Setting the Analysis RangesSetting the Alarm Setpoints HI AlarmLO Alarm HI RangeSelecting a Fixed Range or Autoranging Sensor Fail AlarmCalibration LED Display on StartUp This page intentionally left blank Maintenance Replacing the FuseSensor Installation or Replacement When to Replace a SensorZrO2 Sensor and Cell Block This page intentionally left blank Specifications AppendixSpare Parts List Teledyne Analytical InstrumentsDrawing List