Emerson 3081FG instruction manual Identifying and Correcting Fault Indications, Thermocouple

Page 61

Model 3081FG

6-4 IDENTIFYING AND CORRECTING FAULT INDICATIONS

A fault in the operation of the Two-Wire In Situ Oxygen Analyzer is indicated by the faulted op- eration display. If no faults exist, the display will indicate NONE. Information on the current fault is found under the DIAGNOSTICS MENU as detailed in Section 3, STARTUP AND OPERATION.

The following paragraphs describe the faults, possible causes, and corrective actions. Refer to Figure 6-4 as needed for test points and wir- ing information.

NOTE

Allow adequate time for the oxygen probe to reach its operating tempera- ture [approximately 500°C (932°F)] be- fore investigating a fault. The SHOW FAULTS screen of the DIAGNOSTICS menu will indicate a fault until the unit reaches operating temperature.

Instruction Manual

IB-106-3081 Rev. 1.5

September 2002

NOTE

The probe uses a Type B thermocou- ple to measure the cell temperature. A Type B thermocouple output table may be useful for troubleshooting.

 

CELL+(BK)

CELL-(WH) THERMOCOUPLE-(RD)

 

THERMOCOUPLE+(GY)

 

FACTORY-INSTALLED

 

 

 

 

JUMPER

 

 

 

 

 

TERMINAL

7

8 9

10

 

EARTH

BLOCK (TB1)

11

6

 

 

GROUND

 

5

 

 

12

 

 

 

TERMINALS

 

4

 

 

13

PROBE CABLE

 

 

 

3

 

 

14

 

SHIELD

2

 

 

15

4-20 mA (- )

 

1

 

 

 

GROUND

 

 

 

4-20 mA (+)

 

 

 

16

CELL AND

 

 

 

 

4-20 mA

 

 

 

 

 

THERMOCOUPLE

 

 

 

 

26020023

6

Figure 6-4. Model 3081 Transmitter Terminal Block

Rosemount Analytical Inc. A Division of Emerson Process Management

Troubleshooting 6-3

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Contents Model 3081FG Essential Instructions Highlights of Changes Page Model 3081FG Table of ContentsProper Calibration Check Gas Flow Rate List of IllustrationsModel 3081 Transmitter Terminal Block List of TablesModel 3081FG Definitions PrefaceModel 3081FG 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 3081FG Installing Model 3081 Transmitter Circuit Terminal END Cover LockBlock TB Mounting HolesElectrical Installation Display Positioning AssemblyTerminal Block Conduit Model 3081 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 3081 Transmitter Parameters Parameter Range DefaultModel 3081 Transmitter Parameters SET Code Show Fault Diagnostics MenuC mV 24. Previous Slope Previous Constant 23. Cell ImpedanceSW Build Date SW Build NumberCalcheck Menu Accept LOW O2 27. in MANUAL?29. Accept LOW O2 Slope Model 3081FG Section HART/AMS Hart Communicator Signal LineOverview ConnectionsMethod 2, For Load Resistance 250 Ohms Analog Output Device Loop ConnectorsHart 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 3081FG Model 3081 Electronics Replacement Section Maintenance and ServiceDisplay Board Replacement PC Board Stack ReplacementTwo-Wire In Situ Oxygen Analyzer Exploded View Oxygen Probe Replacement Oxygen Probe Terminal Block Probe Life Section TroubleshootingIMPEDANCE, Ω Ofresponse 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 3081FG Section Return of Material Model 3081FG Replacement Parts List Replacement PartsSection 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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