Emerson 755A User Manual
Model 755a, Oxygen analyzer
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Table of contents
Document Outline
- Model 755A Oxygen Analyzer
- Essential Instructions
- Rosemount Analytical Inc., Process Analytic Division
- Table of Contents
- Preface
- 1-0 Description and Specifications
- 2-0 Installation
- 3-0 Operation
- 4-0 Theory
- 5-0 Circuit Analysis
- 5-1 Overview
- 5-2 +/- 15VDC Power Supply
- 5-3 Case Heater Control Circuit
- 5-4 Detector Heater Control Circuit
- 5-5 Detector Light Source Control Circuit
- 5-6 Detector with First Stage Amplifier and Pressure Compensation Circuits
- 5-7 Buffer Amplifiers U10 and Associated Anticipation Function
- 5-8 Digital Output Circuit
- 5-9 Analog Output Circuits for Recorder and Alarms
- 6-0 Service and Maintenance
- 7-0 Replacement Parts
- 8-0 Return of Material
- Appendix A - Vaisala Barometric Pressure Transducer
- Warranty
- Emerson Process Management - Worldwide
- Figures
- 1-1 Model 755A Oxygen Analyzer
- 1-2 Model 755A Component and Adjustment Locations
- 2-1 Electrical Connections
- 2-2 Control Board
- 2-3 Connections for Potentiometric Recorder with Non-Standard Span
- 2-4 Model 755A Connected to Drive Several Current-Activated Output Devices
- 2-5 Typical Alarm Settings
- 2-6 Relay Terminal Connections for Typical Fail-Safe Application
- 2-7 Connection of Typical Gas Selector Panel to Model 755A Oxygen Analyzer
- 2-8 Installation of Purge Kit (Optional)
- 3-1 Model 755A Front Panel Controls
- 3-2 Model 755A Internal Adjustments Locations
- 3-3 Calibration by Pressure Decrease Setup
- 4-1 Spherical Body in Non-Uniform Magnetic Field
- 4-2 Functional Diagram of Model 755A Paramagnetic Oxygen Measurement System
- 4-3 Detector/Magnet Assembly
- 5-1 Schematic - Two-Comparator OR Circuit
- 5-2 Schematic - Ramp Generator
- 5-3 Schematic - Case Heater Control Circuit
- 5-4 Schematic - Case Heater Circuit
- 5-5 Schematic - Detector Heater Control Circuit
- 5-6 Schematic - Detector Light Source Control Circuit
- 5-7 Schematic - Detector with First Stage Amplifier and Pressure Compensation Circuits
- 5-8 Schematic - Pressure Signal and Reference Voltage Circuits
- 5-9 Schematic - Buffer, Anticipation, and Digital Output Circuit
- 5-10 Schematic - Simplified Analog Output Circuit for Recorder (showing three ranges)
- 6-1 Detector/Magnet Assembly
- 6-2 Detector/Magnet Assembly Wiring
- 6-3 Detector Adjustment
- 6-4 Modification of 633689 Connector Board for Compatibility with Replacement Lamp
- 6-5 Lamp Alignment
- x
- Tables
- Drawings