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Instruction Manual
760008-A
September 2001
Model NGA 2000 TO2
Trace Oxygen Analyzer
http://www.processanalytic.com
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ESSENTIAL INSTRUCTIONS READ THIS PAGE BEFORE PROCEEDING! Rosemount Analytical designs, manufactures and tests its products to meet many national and international standards. Because these instruments are sophisticated technical products, you MUST properly install, use, and maintain them to ensure they continue to operate within their normal specifications. The following instructions MUST be adhered to and integrated into your safety program when installing, using, and maintaining Rosemount Analy
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 TABLE OF CONTENTS PREFACE...........................................................................................................................................P-1 intended use statement ......................................................................................................................P-1 Definitions................................................................................................................
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 e. Display Controls..........................................................................................................3-12 3-5 Expert Controls and Setup .......................................................................................................3-13 a. Calibration Procedure .................................................................................................3-14 b. Alarms..................
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 LIST OF ILLUSTRATIONS Figure 1-1. Trace Oxygen Detector Coulometric Principle..............................................................1-2 Figure 1-2. Trace Oxygen Analyzer Module - Top View .................................................................1-3 Figure 2-1. Analyzer Module Interconnection with Instrument Platform .........................................2-4 Figure 2-2. Outline and Mounting Dimensions...
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 iv Contents Rosemount Analytical Inc. A Division of Emerson Process Management
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 PREFACE INTENDED USE STATEMENT The purpose of this manual is to provide information concerning the components, functions, installation and maintenance of the Model NGA 2000 TO2 and the System Accessories of the NGA 2000 System. Some sections may describe equipment not used in your configuration. The user should become thor- oughly familiar with the operation of this module before operating it. Read this instruction manual com- pletely
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 SAFETY SUMMARY If this equipment is used in a manner not specified in these instructions, protective systems may be im- paired. DANGER. ELECTRICAL SHOCK HAZARD Operate this equipment only when covers are secured. Servicing requires access to live parts which can cause death or serious injury. Refer servicing to qualified personnel. For safety and proper performance, this module must be connected to a properly grounded three-wire sour
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 GENERAL PRECAUTIONS FOR HANDLING AND STORING HIGH PRESSURE GAS CYLINDERS Edited from selected paragraphs of the Compressed Gas Association's "Handbook of Compressed Gases" published in 1981 Compressed Gas Association 1235 Jefferson Davis Highway Arlington, Virginia 22202 Used by Permission 1. Never drop cylinders or permit them to strike each other violently. 2. Cylinders may be stored in the open, but in such cases, should be protect
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 DOCUMENTATION The following NGA 2000 TO2 instruction materials are available. Contact Customer Service Center or the local representative to order. 760008 Instruction Manual (this document) COMPLIANCES This product may carry approvals from several certifying agencies for use in non-hazardous, indoor loca- tions. If so, the product will carry approval insignia on the product name-rating plate. ® NRTL/C Rosemount Analytical Inc. h
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 GLOSSARY OF TERMS Analyzer Module The module that contains all sensor/detector components for development of a Primary Variable signal; in- cludes all signal conditioning and temperature control circuitry. Backplane The interconnect circuit board which the Controller Board, Power Supply, Analyzer Module power and net- work cables, I/O Modules and Expansion Modules plug into. Control Module The Operator Interface plus the Controller
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 Softkeys The five function keys located below the front panel display; they assume the function displayed directly above each on the display, a function dictated by software. System Any collection of Analyzer Module(s), Platform(s), I/O Module(s) and Expansion Module(s). P-6 Preface Rosemount Analytical Inc. A Division of Emerson Process Management
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 SECTION 1 DESCRIPTION AND SPECIFICATIONS 1-1 OVERVIEW The TO2 Analyzer Module uses the cou- lometric principle of oxygen detection. This technology is based on the fact that oxygen in This manual describes the Trace Oxygen (TO2) Analyzer Module of Rosemount Ana- the sample is reduced by an electrochemical reaction. This reduction occurs at the cathode lytical's NGA 2000 Series of gas analysis components. and results in the generation
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 SECONDARY ANODE (+) BI-STRATA™ DIFFUSION BAR- RIER - e ELECTRONICS S SAMPLE IN KOH - O 2 O OH 2 SAMPLE OUT S - e O SENSING CATHODE (-) 2 SECONDARY CATHODE (-) O SENSING ANODE (-) 2 Figure 1-1. Trace Oxygen Detector Coulometric Principle 1-2 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 Sensor Assembly Network/Power Module Sensor Computer Sample Flow Board Sensor Power Board Figure 1-2. Trace Oxygen Analyzer Module - Top View Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-3
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 1 1-5 SPECIFICATIONS a. General Measurement Species................................... Trace Oxygen Ranges .......................................................... 0 to 100 ppm (output scalable down to 0-2 ppm fullscale) Accuracy........................................................ ±3% of reading or ±0.02% of range (except for ranges ≤ 100 ppm: ±3% of reading or ±0.05% of range) Sensitivity ......................................
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 d. Gas Connections Sample In ...................................................... 1/4 inch O.D. tube fitting Sample Out.................................................... 1/4 inch O.D. tube fitting Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-5
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 1-6 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 SECTION 2 INSTALLATION Figure 4-1). Be careful not to lose these WARNING. screws as they have metric threads. Carefully lift out the Sensor assembly and Before starting to install this equip- ment, read the Safety Summary in remove from the analyzer module. Place on a flat surface and remove the black the Preface section of this manual. Failure to follow the safety instruc- Sensor cover by unscrewing counter- clockwise. tions coul
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Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 The same temperature restrictions apply to Module to control flow, the inlet pressure the location of the zero and span gas cylin- to the needle valve should not exceed ders. 345 hPa (5 psig). A constant sample flow rate between 1.0 to 3.0 SCFH (0.5 to 1.5 l/min) is recommended for best results. 2-4 GASES The Analyzer Module must vent to at- mosphere to avoid back pressure influ- a. Requirements ences on the oxygen reading. The TO2 A
