Teledyne OT-3 operating instructions Electronics, General

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Installation	OT-3

Figure 2-2: Characteristic MFC Input/Output Curve

2.3Electronics

2.3.1 General

The signal processing uses an Intel® 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 including the sensor amplifier, microcontroller, analog to digital, and digital to analog converters are located on the Main PCB, which is mounted vertically, just behind the front panel of the Control Unit.

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Contents Trace Oxygen Analyzer Teledyne Analytical InstrumentsModel OT-3 Copyright 2000 Teledyne Analytical InstrumentsSpecific Model Information Important Notice Trace Oxygen Analyzer Table of Contents Maintenance OperationAppendix List of Figures Front PanelOverview Main Features of the AnalyzerIntroduction Trace Oxygen Analyzer IntroductionFront Panel Description Introduction OT-3Function Keys Rear Panel Description Measurement Parameters ReadoutRear Panel AC Version Introduction Installation OT-3Operational Theory Micro-fuel Cell Sensor Trace Oxygen Analyzer Installation Anatomy of a Micro-fuel CellElectrochemical Reactions Calibration Characteristics Effect of PressureElectronics GeneralSignal Processing Block Diagram of the Signal Processing ElectronicsInstallation OT-3 Installation Unpacking the AnalyzerInstalling the Micro-fuel Cell Location and MountingElectrical Connections Primary Input Power Analog OutputsAlarm Relays Contact ID for Failsafe Relay OperationRelay Ratings Gas Connections Solid State Relay OutputGas Connections Sample System Installation Checklist OT-3 Sample SystemInstallation OT-3 Teledyne Analytical Instruments Operation Trace Oxygen Analyzer OperationUsing the Function and Data Entry Buttons Setting the Analysis RangesOperation OT-3 HI Range Setting the Alarm SetpointsSet Alarm LO RangeAlarm Delay Power Failure AlarmKeypad Lockout Selecting a Fixed Range or Autoranging CalibrationDisplaying Percent & PPM on the LED Display Supplementary InformationOperation OT-3 Maintenance Trace Oxygen Analyzer MaintenanceReplacing the Fuse Sensor Installation or Replacement Maintenance OT-3When to Replace a Sensor Ordering and Handling of Spare Sensors Removing the Micro-fuel CellInstalling a Micro-fuel Cell Cell Warranty Conditions Specifications AppendixAppendixOT-3 Spare Parts List Trace Oxygen AnalyzerAppendixAnalytical Instruments Reference Drawing MiscellaneousAppendix OT-3 Index Trace Oxygen Analyzer IndexIndex OT-3 No PassWebsite address Index OT-3 Teledyne Analytical Instruments