Emerson 3081FG instruction manual System Features

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Instruction Manual

IB-106-3081 Rev. 1.5 September 2002

Model 3081FG

The Model 3081 Transmitter is a two-wire transmitter providing an isolated output, 4- 20 mA, that is proportional to the measured oxygen concentration. A customer-supplied 24 VDC power source is required to simul- taneously provide power to the electronics and a 4-20 mA signal loop. The transmitter accepts millivolt signals generated by the probe and produces the outputs to be used by other remotely connected devices. The output is an isolated 4-20 mA linearized current.

d.System Features

1.The cell output voltage and sensitivity increase as the oxygen concentration decreases.

2.High process temperatures eliminate the need for external cell heating and increase cell accuracy.

3.HART communication is standard. To use the HART capability, you must have either:

(a)HART Model 275 Communicator

(b)Asset Management Solutions (AMS) software for the PC

4.Easy probe replacement due to the light-weight, compact probe design.

5.Remote location of the Model 3081 Transmitter removes the electronics from high temperature or corrosive environments.

6.Power is supplied to the electronics through the 4-20 mA line for intrinsic safety (IS) purposes.

7.Infrared remote control (IRC) allows interfacing without exposing the electronics.

8.An operator can operate and diagnos- tically troubleshoot the Two-Wire In Situ Oxygen Analyzer in one of two ways:

(a)Infrared Remote Control. The IRC allows access to fault indication menus on the Model 3081 Trans- mitter LCD display. Calibration can be performed from the IRC keypad.

(b)Optional HART Interface. The Two-Wire In Situ Oxygen Ana- lyzer’s 4-20 mA output line trans- mits an analog signal proportional to the oxygen level. The HART output is superimposed on the 4-20 mA output line. This information can be accessed through the following:

1Rosemount Model 275 Hand- held Communicator - The handheld communicator re- quires Device Description

(DD)software specific to the Two-Wire In Situ Oxygen Analyzer. The DD software will be supplied with many Model 275 units but can also be programmed into existing units at most Fisher- Rosemount service offices. See Section 4, HART/AMS, for additional HART information.

2Personal Computer (PC) - The use of a personal com- puter requires AMS software available from Fisher- Rosemount.

9.Selected Distributed Control Systems - The use of distributed control systems requires input/output (I/O) hardware and AMS Security codes are provided to (by infrared remote control) prevent unintended changes to analyzers adja- cent to the one being accessed.

10.A calibration check procedure is pro- vided to determine if the Rosemount Two-Wire In Situ Oxygen Analyzer is correctly measuring the net oxygen concentration in the industrial process.

1-4 Description and Specifications

Rosemount Analytical Inc. A Division of Emerson Process Management

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Contents Model 3081FG Essential Instructions Highlights of Changes Page Table of Contents Model 3081FGList of Illustrations Proper Calibration Check Gas Flow RateList of Tables Model 3081 Transmitter Terminal BlockModel 3081FG Preface DefinitionsModel 3081FG Section Description and Specifications Component Checklist of Typical System Package ContentsProduct Matrix Code Mounting Adapter Stack SideScope System ConfigurationSystem Overview System DescriptionSystem Features Handling the Analyzer System Considerations Typical System Installation TransmitterSpecifications ProbeVDC Lift OFF Maximum Power Supply VoltageOhms Operating Load RegionMechanical Installation Section InstallationPRE-INSTALLATION InspectFront View Side View Bottom ViewMetal Wall Masonry Wall Stack or Duct Horizontal Probe Installation Adjusting Probe Insertion Depth Model 3081FG Installing Model 3081 Transmitter Block TB Cover LockCircuit Terminal END Mounting HolesDisplay Positioning Assembly Electrical InstallationThermocouple CELL-WH CELL+BK Model 3081 Transmitter 4-20 mA and Signal ConnectionsTerminal Block Conduit Instrument Air Reference Air Pneumatic InstallationReference Air Package Calibration Check GasInlet Connection Outlet ConnectionOutlet Flow SET MAX Point Knob Mounting HolesGeneral Power UPSection Startup and Operation Reestablishing Proper Calibration Check GAS Flow Rate Proper Calibration Check Gas Flow RateDisplay OperationOverview Menu TreeMenu DiagnosticsCalcheck ProgramInfrared Remote Control IRC NavigationProgram Menu O2 Concentration Analyzer Access Code Or SecurityAnalyzer Access Code O2 ConcentrationUpper Range VAL O2 Concentration Indicator Fault ValueO2 Concentration Upper Cell Temperature Fault Value Cell T HIO2 Concentration Analyzer Access Code Reset MAX Cell TTo Reset Maximum Cell Temperature SET O2 Filter TimeConcentration SET HI Bottle O2SET LO Bottle O2 Model 3081 Transmitter Parameters SET Code Parameter Range DefaultModel 3081 Transmitter Parameters C mV Diagnostics MenuShow Fault 23. Cell Impedance 24. Previous Slope Previous ConstantCalcheck Menu SW Build NumberSW Build Date 27. in MANUAL? Accept LOW O229. Accept LOW O2 Slope Model 3081FG Overview Hart Communicator Signal LineSection HART/AMS ConnectionsAnalog Output Device Loop Connectors Method 2, For Load Resistance 250 OhmsOFF-LINE and ON-LINE Operations TWO-WIRE in Situ Oxygen AnalyzerHart Communicator PC 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 3081FG Display Board Replacement Section Maintenance and ServiceModel 3081 Electronics Replacement PC Board Stack ReplacementTwo-Wire In Situ Oxygen Analyzer Exploded View Oxygen Probe Replacement Oxygen Probe Terminal Block IMPEDANCE, Ω Section TroubleshootingProbe Life Speed Fault IndicationsOfresponse Identifying and Correcting Fault Indications ThermocoupleFault 1, Open Thermocouple Fault 3, Shorted Thermocouple Fault 5, O2 Cell Open Fault 5, O2 Cell Open Fault 6, Cell Impedance Too HighFault 7, Reversed O2 Cell 11. Fault 7, Reversed O2 CellModel 3081FG Section Return of Material Model 3081FG Section Replacement PartsReplacement Parts List Index No Part Number DescriptionModel 3081FG Section Index Model 3081FG Model 3081FG Page Section Drawings and Schematics Model 3081FG Warranty Two-Wire In Situ Oxygen Analyzer Serial no Order no
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