Emerson Process Management 755R マニュアル

目次

• Model 755R Oxygen Analyzer

  1
  • Essential Instructions

    2
  • Rosemount Analytical Inc., Process Analytic Division

    2
  • Table of Contents

    3
  • List of Illustrations

    5
  • List of Tables

    6
  • List of Drawings

    6
• Preface

  7
  • Definitions

    7
  • Intended Use Statement

    8
  • Safety Summary

    8
  • Authorized Personnel

    8
  • General Precautions for Handling and Storing High Pressure Gas Cylinders

    10
  • Documentation

    11
  • Compliances

    11
• 1-0 Description and Specifications

  13
  • 1-1 Description

    13
  • 1-2 Recorder Output Ranges

    13
  • 1-3 Mounting

    13
  • 1-4 Isolated Current Output Option

    13
  • 1-5 Alarm Option

    14
  • 1-6 Electrical Options

    14
  • 1-7 Remote Range Change Option

    14
  • 1-8 Specifications

    15
    • a. Performance

      15
    • b. Sample

      15
    • c. Electrical

      16
    • d. Physical

      16
• 2-0 Installation

  17
  • 2-1 Facility Preparation

    17
    • a. Installation Drawings

      17
    • b. Electrical Interconnection Diagram

      17
    • c. Flow Diagram

      17
    • d. Location and Mounting

      17
  • 2-2 Calibration Gas Requirements

    18
    • a. Zero Standard Gas

      18
    • b. Span Standard Gas

      18
  • 2-3 Sample

    18
    • Basic Requirements for Sample

      18
    • a. Temperature Requirements

      18
    • b. Pressure Requirements - General

      19
    • c. Normal Operation at Positive Gauge Pressures

      19
    • d. Operation at Negative Gauge Pressures

      20
    • e. Flow Rate

      20
    • f. Materials in Contact with Sample

      20
    • g. Corrosive Gases

      20
  • 2-4 Leak Test

    21
  • 2-5 Electrical Connections

    22
    • a. Line Power Connection

      22
    • b. Recorder Output Selection and Cable Connections

      22
    • c. Potentiometric Output

      23
    • d. Isolated Current Output (Optional)

      23
    • e. Output Connections and Initial Setup for Dual Alarm Option

      24
  • 2-6 Remote Range Change Option

    28
• 3-0 Operation

  29
  • 3-1 Overview

    29
  • 3-2 Operating Range Selection

    29
  • 3-3 Startup Procedure

    29
  • 3-4 Calibration

    29
    • a. Calibration with Zero and Span Standard Gases

      29
      • Set Zero Calibration Point

        29
      • Set Span Calibration Point

        30
  • 3-5 Compensation for Composition of Background Gas

    30
    • a. Oxygen Equivalent Value of Gases

      32
    • b. Computing Adjusted Settings for Zero and Span Controls

      32
  • 3-6 Selection of Setpoints and Deadband on Alarm Option

    35
  • 3-7 Current Output Board (Option)

    35
  • 3-8 Routine Operation

    36
  • 3-9 Effect of Barometric Pressure Changes on Instrument Readout

    36
  • 3-10 Calibration Frequency

    36
• 4-0 Theory

  37
  • 4-1 Principles of Operation

    37
  • 4-2 Variables Influencing Paramagnetic Oxygen Measurements

    38
    • a. Pressure Effects

      38
  • 4-3 Electronic Circuitry

    40
    • a. Detector/Magnet Assembly

      40
    • b. Control Board and Associated Circuitry

      40
      • Input Amplifier U1

        41
      • Amplifier U2 and Associated Zero Adjustment

        41
      • Amplifier U4 and Associated Span Adjustment

        41
      • Amplfier U8

        41
      • Amplifier U10

        41
    • c. Power Supply Board Assembly

      41
      • Source Lamp Power Supply Section

        41
      • +/-15V Power Supply Section

        42
      • Detector Temperature Control Section

        42
      • Detector Compartment Temperature Control Section

        42
    • d. Isolated Current Output Board (Optional)

      42
• 5-0 Circuit Analysis

  45
  • 5-1 Circuit Operation

    45
  • 5-2 +/-15 VDC Power Supply

    45
  • 5-3 Case Heater Control Circuit

    45
  • 5-4 Detector Heater Control Circuit

    50
  • 5-5 Detecor Light Source Control Circuit

    51
  • 5-6 Detector with First Stage Amplifier

    52
  • 5-7 Buffer Amplifiers U8 and U10 with Associated Anticipation Function

    54
  • 5-8 Digital Output Circuit

    54
  • 5-9 Analog Output Circuits for Recorder and Alarms

    55
    • a. First Stage Amplifier

      55
    • b. Second Stage Amplifier

      55
• 6-0 Maintenance and Service

  57
  • 6-1 Initial Checkout with Standard Gases

    57
    • Digital display gives correct reading with standard gases, but not with sample gas

      57
    • Digital display gives correct readings with standard gases, but the alarm or output devices do not

      57
    • Digital display gives overrange readings with standard gases, as well as sample gas

      57
    • Digital display gives erratic readings with standard gases, as well as sample gas

      57
    • a. Control Board Checkout

      57
      • Voltage

        57
      • Alarms

        58
      • Current Output

        58
  • 6-2 Heating Circuits

    58
    • a. Case Heater Control Circuit

      58
  • 6-3 Detector/Magnet Heating Circuit

    58
  • 6-4 Detector Check

    60
    • a. Source Lamp

      61
    • b. Photocell

      61
    • c. Suspension

      61
  • 6-5 Replacement of Detector/Magnet Components

    61
    • a. Source Lamp

      61
    • b. Photocell

      61
    • c. Detector

      63
  • 6-6 Control Board Setup

    63
    • a. Power Supply Test

      63
    • b. Detector zero

      63
    • c. U4 Zero

      64
    • d. U8 Zero

      64
    • e. U10 Zero

      64
    • f. Fullscale

      64
    • g. Recorder Fullscale

      64
• 7-0 Replacement Parts

  65
  • 7-1 Circuit Board Replacment Policy

    65
  • 7-2 Matrix

    66
  • 7-3 Selected Replacement Parts

    67
• 8-0 Return of Material

  69
  • 8-1 Return of Material

    69
  • 8-2 Customer Service

    69
  • 8-3 Training

    69
• Warranty

  71
• Emerson Process Management - Worldwide

  72
• Figures

  1
  • 1-1 Model 755R Oxygen Analyzer - Front Panel

    13
  • 2-1 Interconnect of Typical Gas Manifold to Model 755R

    19
  • 2-2 Model 755R Rear Panel

    21
  • 2-3 Connections for Potentiometric Recorder with Non-Standard Span

    22
  • 2-4 Model 755R Connected to Drive Several Current Actuated Output Devices

    23
  • 2-5 Relay Terminal Connections for Typical Fial-Safe Applications

    24
  • 2-6 Typical Alarm Settings

    26
  • 2-7 Alarm Relay Assembly Schematic Diagram

    27
  • 3-1 Control Board - Adjustment Locations

    31
  • 3-2 Dial Settings for Alarm Setpoint Adjustments

    35
  • 4-1 Functional Diagram of Paramagnetic Oxygen Measurement System

    39
  • 4-2 Spherical Body in Non-Uniform Magnetic Field

    40
  • 4-3 Detector/Magnet Assembly

    43
  • 5-1 Two-Comparator OR Circuit

    46
  • 5-2 Case Heater Control Circuit

    47
  • 5-3 Ramp Generator Circuit

    47
  • 5-4 Detector Heater Control Circuit

    50
  • 5-5 Detector Light Source Control Circuit

    51
  • 5-6 Detector with First Stage Amplifier

    53
  • 5-7 Buffer, Anticipation, and Digital Output Circuits

    54
  • 5-8 Simplified Analog Recorder Output Circuit

    56
  • 6-1 Detector/Magnet Assembly

    59
  • 6-2 Pin/Lead Removal

    60
  • 6-3 Detector Optical Bench

    60
  • 6-4 Lamp Replacement

    62
• Tables

  1
  • 2-1 Remote Range Switching Truth Table

    28
  • 3-1 Calibration Range for Various Zero-Based Operating Ranges

    32
  • 3-2 Oxygen Equivalent of Common Gases

    34
• Drawings

  1
  • 617186 Schematic Diagram, Power Supply Board

    73
  • 620434 Schematic Diagram, Isolated Current Output Board

    74
  • 646090 Schematic Diagram, Remote Range Board

    75
  • 652826 Schematic Diagram, Control Board

    76
  • 654014 Pictorial Wiring Diagram, Model 755R

    77
  • 654015 Installation Drawing, Model 755R

    78
  • 656081 Instructions, Remote Range Selection

    79