Rosemount 755 Bedienungsanleitung
Rosemount Analytical
MODEL 755
OXYGEN ANALYZER
INSTRUCTION MANUAL
748183-H
NOTICE
The information contained in this document is subject to change without notice.
Manual Part Number 748183-H
November 1997
Printed in U.S.A.
Rosemount Analytical Inc.
4125 East La Palma Avenue
Anaheim, California 92807-1802
Viton® are registered trademarks of E.I. duPont de Nemours and Co., Inc.
Paliney No. 7™ is a trademark of J. M. Ney Co.
SNOOP®is a registered trademark of NUPRO Co.
CONTENTS
748183-H i
Rosemount Analytical
November 1997
PREFACE
INTENDED USE STATEMENT ..........................................................................P-1
SAFETY SUMMARY ..........................................................................................P-1
SPECIFICATIONS - GENERAL .........................................................................P-3
SPECIFICATIONS - SAMPLE............................................................................P-4
SPECIFICATIONS - ELECTRICAL.....................................................................P-4
SPECIFICATIONS - PHYSICAL - GENERAL PURPOSE ENCLOSURE...........P-5
SPECIFICATIONS - PHYSICAL EXPLOSION PROOF ENCLOSURE .............P-5
CUSTOMER SERVICE, TECHNICAL ASSISTANCE AND FIELD SERVICE....P-6
RETURNING PARTS TO THE FACTORY.........................................................P-6
TRAINING ......................................................................................................P-6
DOCUMENTATION............................................................................................P-6
COMPLIANCES .................................................................................................P-7
SECTION 1. INTRODUCTION
1.1 RANGE OPTIONS....................................................................................1-1
1.1.1 Standard Zero-Based Range Options.........................................1-1
1.1.2 Standard Zero-Suppressed Range Options................................1-3
1.1.3 Special Range Options ...............................................................1-3
1.2 ISOLATED CURRENT OUTPUT OPTIONS.............................................1-5
1.3 ALARM OPTION.......................................................................................1-5
1.4 CASE MOUNTING OPTIONS ..................................................................1-5
1.5 ELECTRICAL OPTIONS ..........................................................................1-5
MODEL 755 OXYGEN ANALYZER
ii 748183-HRosemount Analytical November 1997
SECTION 2. INSTALLATION
2.1 UNPACKING............................................................................................ 2-1
2.2 LOCATION............................................................................................... 2-1
2.2.1 Location and Mounting............................................................... 2-1
2.3 VOLTAGE REQUIREMENTS .................................................................. 2-1
2.4 ELECTRICAL CONNECTIONS................................................................ 2-2
2.4.1 Line Power Connections............................................................. 2-2
2.4.2 Recorder Output Selection and Cable Connections................... 2-2
2.4.3 Output Connections, Initial Setup for Dual Alarm Option............ 2-6
2.5 CALIBRATION......................................................................................... 2-10
2.5.1 Downscale Standard Gas........................................................... 2-11
2.5.2 Upscale Standard Gas ............................................................... 2-11
2.6 SAMPLE HANDLING............................................................................... 2-12
2.6.1 Sample Temperature Requirements........................................... 2-12
2.6.2 Sample Pressure Requirements: General................................. 2-13
2.6.3 Normal Operation at Positive Gauge Pressures......................... 2-13
2.6.4 Operation at Negative Gauge Pressures.................................... 2-14
2.6.5 Sample Flow Rate...................................................................... 2-14
2.6.6 Corrosive Gases........................................................................ 2-15
2.7 LEAK TEST.............................................................................................. 2-15
2.8 PURGE KIT (OPTIONAL) ........................................................................ 2-15
SECTION 3. STARTUP
3.1 STARTUP PROCEDURE......................................................................... 3-1
3.2 CALIBRATION......................................................................................... 3-1
3.2.1 Calibration with Downscale and Upscale Standard Gases......... 3-4
3.2.2 Alternate Calibration Procedure Using Upscale Standard
Gas Only....................................................................... 3-5
3.3 COMPENSATION FOR COMPOSITION OF BACKGROUND GAS........ 3-6
3.3.1 Oxygen Equivalent Values of Gases.......................................... 3-7
3.3.2 Computing Adjusted Settings for Zero and Span Controls......... 3-8
CONTENTS
748183-H iii
Rosemount Analytical
November 1997
SECTION 4. OPERATION
4.1 ROUTINE OPERATION ...........................................................................4-1
4.2 EFFECT OF BAROMETRIC PRESSURE CHANGES ON
INSTRUMENT READOUT............................................................4-1
4.3 CALIBRATION FREQUENCY ..................................................................4-2
SECTION 5. THEORY
5.1 PRINCIPLES OF OPERATION ................................................................5-1
5.1.1 Magnetic Displacement Force.....................................................5-3
5.1.2 Physical Configuration of Detector/Magnet Assembly.................5-4
5.2 VARIABLES INFLUENCING PARAMAGNETIC OXYGEN
MEASUREMENTS........................................................................5-5
5.2.1 Pressure Effects..........................................................................5-5
5.2.2 Temperature Effects....................................................................5-6
5.2.3 Interferents.................................................................................5-6
5.2.4 Vibration Effects..........................................................................5-6
5.3 ELECTRONIC CIRCUITRY......................................................................5-7
5.3.1 Detector/Magnet Assembly.........................................................5-7
5.3.2 Control Board and Associated Circuitry ......................................5-7
5.3.3 Case Board Assembly.................................................................5-8
5.3.4 Isolated Current Output Board (Optional)....................................5-9
5.3.5 Alarm Option...............................................................................5-9
SECTION 6. CIRCUIT ANALYSIS
6.1 POWER SUPPLY., ±15VDC ....................................................................6-1
6.2 CASE HEATER CONTROL CIRCUIT ......................................................6-1
6.3 DETECTOR HEATER CONTROL CIRCUIT ............................................6-5
6.4 DETECTOR LIGHT SOURCE CONTROL CIRCUIT................................6-6
6.5 DETECTOR WITH FIRST STAGE AMPLIFIER.......................................6-7
6.6 FINAL OUTPUT AMPLIFIER....................................................................6-10
6.7 ZERO SUPPRESSION MODULE FOR ZERO ADJUSTMENT................6-11
MODEL 755 OXYGEN ANALYZER
iv 748183-HRosemount Analytical November 1997
SECTION 7. SERVICE AND MAINTENANCE
7.1 INITIAL CHECKOUT WITH STANDARD GASES.................................... 7-1
7.2 CHECKOUT AT TEST POINTS ON CASE CIRCUIT BOARD................. 7-2
7.3 DETECTOR COMPONENT CHECKOUT................................................ 7-4
7.3.1 Detector ..................................................................................... 7-4
7.3.2 Source Lamp.............................................................................. 7-4
7.3.3 Photocell..................................................................................... 7-4
7.3.4 Suspension................................................................................. 7-5
7.4 DETECTOR COMPONENT REPLACEMENT ......................................... 7-5
7.4.1 Detector Replacement and Calibration....................................... 7-5
7.4.2 Source Lamp Replacement and Adjustment.............................. 7-8
7.4.3 Photocell Replacement and Alignment....................................... 7-10
7.5 HEATING CIRCUITS............................................................................... 7-11
7.5.1 Case Heater Control Circuit........................................................ 7-11
7.5.2 Detector/Magnet Heating Circuit ................................................ 7-11
SECTION 8. REPLACEMENT PARTS
8.1 CIRCUIT BOARD REPLACEMENT POLICY........................................... 8-1
8.2 REPLACEMENT PARTS ......................................................................... 8-1
GENERAL PRECAUTIONS FOR STORING AND HANDLING HIGH PRESSURE GAS CYLINDERS
WARRANTY
FIELD SERVICE AND REPAIR FACILITIES
CONTENTS
748183-H v
Rosemount Analytical
November 1997
FIGURES
1-1 Model 755 - Front View ............................................................................1-2
1-2 Model 755 - Location of Major Components.............................................1-4
2-1 Electrical Interonnection...........................................................................2-3
2-2 Control Board - Adjustment Locations......................................................2-4
2-3 Potentiometric Recorder with Non-Standard Span...................................2-5
2-4 Model 755 Connected to Drive Current-Activated Output Devices...........2-6
2-5 Typical Alarm Settings..............................................................................2-7
2-6 Relay Terminal Connections ....................................................................2-8
2-7 Alarm Relay Option Schematic Diagram..................................................2-9
2-8 Connection of Typical Gas Selector Panel to Model 755..........................2-12
2-9 Installation of Purge Kit.............................................................................2-17
3-1 Control Board - Adjustment Locations......................................................3-2
5-1 Functional Diagram of Model 755 Paramagnetic Oxygen
Measurement System ...................................................................5-2
5-2 Spherical Body in Non-Uniform Magnetic Field........................................5-3
5-3 Detector/Magnet Assembly.......................................................................5-4
6-1 Two-Comparator OR Circuit.....................................................................6-2
6-2 Case Heater Control Circuit......................................................................6-3
6-3 Ramp Generator.......................................................................................6-3
6-4 Detector Heater Control Circuit.................................................................6-6
6-5 Detector Light Source Control Circuit.......................................................6-7
6-6 Detector with First Stage Amplifier ...........................................................6-8
6-7 Final Output Amplifier...............................................................................6-11
6-8 Zero Suppression Module ........................................................................6-12
7-1 Locations of Case Board Test Points A, B, C and D.................................7-3
7-2 Voltage Test Points ..................................................................................7-4
7-3 Detector/Magnet Assembly.......................................................................7-6
7-4 Detector/Magnet Assembly Wiring ...........................................................7-7
7-5 Modification of 633689 Connector Board for Compatibility with
Replacement Lamp.......................................................................7-9
7-6 Lamp Alignment.........................................................................................7-9
7-7 Photocell Adjustment Voltmeter Lead Location........................................7-10
TABLES
1-1 Front Panel Controls.................................................................................1-3
1-2 Range Options..........................................................................................1-3
2-1 Calibration Range for Various Operating Ranges.....................................2-11
3-1 Control Board - Adjustment Functions......................................................3-3
3-2 Calibration Range for Various Operating Ranges.....................................3-4
3-3 Oxygen Equivalents of Common Gases...................................................3-7
MODEL 755 OXYGEN ANALYZER
vi 748183-HRosemount Analytical November 1997
DRAWINGS (LOCATED IN REAR OF MANUAL)
617186 Schematic Diagram, Case Board
620434 Schematic Diagram, Isolated Current Output Board
624549 Pictorial Wiring Diagram, Model 755
632349 Installation Drawing, Model 755 - General Purpose
638277 Schematic Diagram, Alarm
643127 Installation Drawing, Model 755 Explosion-Proof
652188 Schematic Diagram, Control Board
PREFACE
Rosemount Analytical
748183-H November 1997 P-1
INTENDED USE STATEMENT
The Model 755 is intended for use as an industrial process measurement device only.
It is not intended for use in medical, diagnostic, or life support applications, and no
independent agency certifications or approvals are to be implied as covering such
application.
SAFETY SUMMARY
To avoid explosion, loss of life, personal injury and damage to this equipment and
on-site property, all personnel authorized to install, operate and service the Model 755
Oxygen Analyzer should be thoroughly familiar with and strictly follow the instructions
in this manual. Save these instructions.
DANGER is used to indicate the presence of a hazard which will cause severe
personal injury, death, or substantial property damage if the warning is ignored
WARNING is used to indicate the presence of a hazard which can cause severe
personal injury, death, or substantial property damage if the warning is ignored.
CAUTION is used to indicate the presence of a hazard which will or can cause minor
personal injury or property damage if the warning is ignored.
NOTE is used to indicate installation, operation, or maintenance information which is
important but not hazard-related.
Do not operate without doors and covers secure. Servicing requires access to
live parts which can cause death or serious injury. Refer servicing to qualified
personnel.
For safety and proper performance this instrument must be connected to a
properly grounded three-wire source of power.
WARNING: ELECTRICAL SHOCK HAZARD
MODEL 755 OXYGEN ANALYZER
Rosemount Analytical 748183-H
November 1997
P-2
The general purpose Model 755 Oxygen Analyzer, catalog number 191102, is for
operation in non-hazardous locations. It is of a type capable of analysis of
sample gases which may be flammable. If used for analysis of such gases, the
instrument must be protected by a continuous dilution purge system in
accordance with Standard ANSI/NFPA-496-1086 (Chapter 8) or IEC Publication
79-2-1983 (Section Three).
The explosion-proof Model 755 Oxygen Analyzer, catalog number 632440, is for
operation in hazardous locations. The enclosure must be properly secured with
all flange bolts in place and tightened, lens cover fully engaged, all factory
installed flame arrestor assemblies are properly installed in sample inlet and
outlet and any unused openings plugged with approved threaded plugs properly
secured in place. Installation must be made in accordance with applicable parts
of the NEC, especially Articles 501-4(a) and 501-5(a)(1).
If explosive gases are introduced into this analyzer, the sample containment
system must be carefully leak-checked upon installation and before initial start-
up, during routine maintenance and any time the integrity of the sample
containment system is broken, to ensure the system is in leak-proof condition.
Leak-check instructions are provided in Section 2.7.
Internal leakage of sample resulting from failure to observe these precautions
could result in an explosion causing death, personal injury, or property damage.
Tampering or unauthorized substitution of components may adversely affect
safety of this product. Use only factory documented components for repair.
This analyzer requires periodic calibration with known zero and standard gases.
See General Precautions for Handling and Storing High Pressure Cylinders, in
the rear of this manual.
WARNING: POSSIBLE EXPLOSION HAZARD
WARNING: HIGH PRESSURE GAS CYLINDERS
CAUTION: PARTS INTEGRITY
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