Emerson 5081FG instruction manual System Overview, Scope, System Description, System Configuration

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Model 5081FG

Instruction Manual

IB-106-5081, Rev. 1.0

May 2005

1

1-2 SYSTEM OVERVIEW

a.Scope

This Instruction Bulletin is designed to sup- ply details needed to install, start up, oper- ate, and maintain the Rosemount Analytical Two-Wire In Situ Oxygen Analyzer. The analyzer consists of an oxygen probe and Model 5081 Transmitter. The signal condi- tioning electronics of the Model 5081 Transmitter outputs a 4-20 mA signal repre- senting an O2 value. An infrared remote control (IRC) allows access to setup, cali- bration, and diagnostics. This same infor- mation, plus additional details, can be accessed with the HART Model 275/375 handheld communicator or Asset Manage- ment Solutions (AMS) software.

b.System Description

The Rosemount Analytical Two-Wire In Situ Oxygen Analyzer is designed to measure the net concentration of oxygen in an industrial process; i.e., the oxygen remaining after all fuels have been oxidized. The oxygen probe is permanently positioned within an exhaust duct or stack and performs its task without the use of a sampling system. The Model 5081 Transmitter is mounted remotely and condi- tions the oxygen probe outputs.

The equipment measures oxygen percent- age by reading the voltage developed across an electrochemical cell, which con- sists of a small yttria-stabilized, zirconia disc. Both sides of the disc are coated with porous metal electrodes. The millivolt output voltage of the cell is given by the following Nernst equation:

EMF = KT log10(P1/P2) + C

Where:

1.P2 is the partial pressure of the oxygen in the measured gas on one side of the cell.

2.P1 is the partial pressure of the oxygen in the reference air on the opposite side of the cell.

3.T is the absolute temperature.

4.C is the cell constant.

5.K is an arithmetic constant.

NOTE

For best results, use clean, dry, in- strument air (20.95% oxygen) as the reference air.

NOTE

The probe uses a Type B thermocou- ple to measure the cell temperature.

When the cell is at 550°C to 1600°C (1022°F to 2912°F) and there are unequal oxygen concentrations across the cell, oxy- gen ions will travel from the high oxygen partial pressure side to the low oxygen par- tial pressure side of the cell. The resulting logarithmic output voltage is approximately 50 mV per decade.

The output is proportional to the inverse loga- rithm of the oxygen concentration. Therefore, the output signal increases as the oxygen concentration of the sample gas decreases. This characteristic enables the Rosemount Analytical Two-Wire In Situ Oxygen Analyzer to provide exceptional sensitivity and accuracy at low oxygen concentrations.

Oxygen analyzer equipment measures net oxygen concentration in the presence of all the products of combustion, including water vapor. Therefore, it may be considered an analysis on a "wet" basis. In comparison with older methods, such as the portable apparatus, which provides an analysis on a "dry" gas basis, the "wet" analysis will, in general, indicate a lower percentage of oxy- gen. The difference will be proportional to the water content of the sampled gas stream.

c.System Configuration

The equipment discussed in this manual consists of two major components: the oxy- gen probe and the Model 5081 Transmitter.

Oxygen probes are available in three length options, providing in situ penetration appro- priate to the size of the stack or duct. The options on length are 20 in. (508 mm), 26 in. (660 mm), or 34.625 in. (880 mm).

Rosemount Analytical Inc. A Division of Emerson Process Management

Description and Specifications 1-3

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Contents Model 5081FG Essential Instructions Effective May, 2005 Rev Highlights of ChangesSummary Page Model 5081FG Table of ContentsList of Illustrations List of Tables Model 5081FG Definitions PrefaceModel 5081FG Belangrijk Vigtigt Model 5081FG Tärkeää Model 5081FG Wichtig Importante Viktig Model 5081FG Model 5081FG Viktigt Model 5081FG Component Checklist of Typical System Package Contents Section Description and SpecificationsCode Mounting Adapter Stack Side Product MatrixSystem Overview System ConfigurationScope System DescriptionSystem Features Handling the Analyzer System Considerations Transmitter Typical System InstallationProbe SpecificationsOhms Lift OFF Maximum Power Supply VoltageVDC Operating Load RegionPRE-INSTALLATION Section InstallationMechanical Installation InspectSide View Bottom View Front ViewMetal Wall Masonry Wall Stack or Duct Horizontal Probe Installation Adjusting Probe Insertion Depth Model 5081FG Installing Model 5081 Transmitter Circuit Terminal END Cover LockBlock TB Mounting HolesElectrical Installation Display Positioning AssemblyTerminal Block Conduit Model 5081 Transmitter 4-20 mA and Signal ConnectionsThermocouple CELL-WH CELL+BK Reference Air Package Pneumatic InstallationInstrument Air Reference Air Calibration Check GasOutlet Outlet ConnectionInlet Connection Flow SET MAX Point Knob Mounting HolesSection Startup and Operation Power UPGeneral Proper Calibration Check Gas Flow Rate Reestablishing Proper Calibration Check GAS Flow RateOverview OperationDisplay Menu TreeCalcheck DiagnosticsMenu ProgramNavigation Infrared Remote Control IRCAnalyzer Access Code O2 Concentration Analyzer Access Code Or SecurityProgram Menu O2 ConcentrationO2 Concentration Upper Cell Temperature Fault Value O2 Concentration Indicator Fault ValueUpper Range VAL Cell T HITo Reset Maximum Cell Temperature Reset MAX Cell TO2 Concentration Analyzer Access Code SET O2 Filter TimeSET LO Bottle O2 SET HI Bottle O2Concentration Model 5081 Transmitter Parameters Parameter Range DefaultModel 5081 Transmitter Parameters SET Code Show Fault Diagnostics MenuC mV 24. Previous Slope Previous Constant 23. Cell ImpedanceCalcheck Menu Accept LOW O2 27. in MANUAL?29. Accept LOW O2 Slope Model 5081FG Section HART/AMS Hart Communicator Signal LineOverview ConnectionsAnalog Output Device Method 2, For Load Resistance 250 OhmsHart Communicator PC TWO-WIRE in Situ Oxygen AnalyzerOFF-LINE and ON-LINE Operations Menu Tree for Hart CommunicatorDevice Setup From Sheet Basic Setup Detailed From Sheet Signal Condition Detailed Setup Output Hart Communicator Start CAL- Check Method Model 5081FG Model 5081 Electronics Replacement Section Maintenance and ServiceDisplay Board Replacement Spare Board Stack ReplacementRibbon Cable Analog Board CPU Two-Wire In Situ Oxygen Analyzer Exploded ViewOxygen Probe Replacement Oxygen Probe Terminal Block Probe Life Section TroubleshootingNormal Operational Conditions IMPEDANCE, ΩOfresponse Fault IndicationsSpeed Thermocouple Identifying and Correcting Fault IndicationsFault 1, Open Thermocouple Fault 3, Shorted Thermocouple Fault 5, O2 Cell Open Fault 6, Cell Impedance Too High Fault 5, O2 Cell Open11. Fault 7, Reversed O2 Cell Fault 7, Reversed O2 CellModel 5081FG Section Return of Material Model 5081FG Replacement Parts List Replacement PartsSection Index No Part Number DescriptionModel 5081FG Section Index Model 5081FG Model 5081FG Page Warranty Two-Wire In Situ Oxygen Analyzer Serial no Order no

5081FG specifications

The Emerson 5081FG Series is a cutting-edge digital smart transmitter designed for various industrial applications, including oil and gas, chemical processing, and water treatment. Known for its accuracy and reliability, the Emerson 5081FG integrates an array of advanced technologies to enhance measurement capabilities and operational efficiency.

One of the main features of the 5081FG is its multi-variable measurement, which allows for the integration of differential pressure, static pressure, and temperature readings into a single device. This capability significantly reduces the need for multiple instruments, leading to lower installation costs and improved data collection efficiency.

With Smart Wireless technology, the Emerson 5081FG offers robust wireless communication, making it ideal for remote or hard-to-reach locations. Its ability to transmit real-time data wirelessly enhances operational awareness and enables proactive maintenance decisions. The transmitter can easily connect to various process control systems for seamless integration and data sharing.

The 5081FG also incorporates Emerson's advanced diagnostics and predictive maintenance algorithms. These features continuously monitor the health of the transmitter and the processes it measures, alerting operators to potential issues before they escalate into serious problems. This proactive approach to maintenance not only improves safety but also minimizes downtime and maximizes productivity.

Another significant characteristic of the Emerson 5081FG is its rugged design, built to withstand harsh industrial environments. With an IP67 rating, it is resistant to dust and water ingress, ensuring reliable operation even in challenging conditions. The device is also designed to handle a wide range of temperatures and pressures, making it versatile for diverse applications.

User-friendly configuration and programming are facilitated by Emerson's intuitive software tools, which provide easy setup and calibration processes. This simplicity allows operators to optimize performance without needing extensive training or support.

In conclusion, the Emerson 5081FG is a powerful and reliable smart transmitter that addresses the needs of various industries. Its multi-variable measurement capability, wireless communication, advanced diagnostics, and rugged design make it an excellent choice for companies looking to enhance their operational efficiency and maintain high standards of safety and reliability. With the Emerson 5081FG, businesses can expect not only accurate measurements but also valuable insights that contribute to smarter decision-making.
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