Emerson 5081-T Troubleshooting When a Fault or Warning Message is Showing, Temp HI, Temp LO

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MODEL 5081-T

SECTION 10.0

 

DIAGNOSIS AND TROUBLESHOOTING

10.8TROUBLESHOOTING WHEN A FAULT OR WARNING MESSAGE IS SHOWING

 

Message

Explanation

See Section

 

 

 

 

 

 

 

OuEr rAnGE

Over range, measurement exceeds display limit

10.8.1

 

 

 

 

 

 

 

SEnSor FAIL

Bad sensor, sensor current is a large negative number

10.8.2

 

 

 

 

 

 

 

CAL Error

Calibration error, sensitivity (nA/ppm) is too high or too low

10.8.3

 

 

 

 

 

 

 

nEEd 0 CAL

Sensor needs re-zeroing, reading is too negative

10.8.4

 

 

 

 

 

 

 

rtd FAIL

Bad temperature reading

10.8.5

 

 

TEMP HI

Temperature reading exceeds 275°C when auto temp is selected

10.8.5

 

 

 

 

 

 

 

TEMP LO

Temperature reading is less than -25°C when auto temp is selected

10.8.5

 

 

 

 

 

 

 

SenSE OPEn

Sense line is not connected

10.8.6

 

 

OFFSEt Err

Zero offset during standardization exceeds programmed limit

10.8.7

 

 

 

 

 

 

 

FACt FAIL

Unit has not been factory-calibrated

10.8.8

 

 

 

 

 

 

 

CPU FAIL

Internal CPU tests have failed

10.8.9

 

 

 

 

 

 

 

ROM FAIL

Internal memory has failed

10.8.9

 

 

AdC Error

Analog to digital conversion failed

10.8.10

 

 

 

 

 

 

 

 

 

 

 

10.8.1 OuEr rAnGE and AMP FAIL.

These error messages appear if the sensor current is too high. Normally, excessive sensor current implies that the sensor is miswired or the sensor has failed.

1.Verify that wiring is correct and connections are tight. Be sure to check connections at the junction box if one is being used. See Section 3.0.

2.Replace the sensor membrane and electrolyte solution and clean the cathode if necessary. See the sensor instruction sheet for details.

3.Replace the sensor.

10.8.2 SEnSor FAIL.

Bad sensor means that the sensor current is a large negative number.

1.SEnSor FAIL may appear for a while when the sensor is first placed in service. Observe the sensor current (go to SEnSor Cur under the diagnostic menu). If the sensor current is moving in the positive direction, there is probably nothing wrong and the error message should soon disappear.

2.Verify that wiring is correct. Pay particular attention the anode and cathode connections.

3.Verify that the transmitter is configured for the correct measurement. Configuring the measurement sets (among other things) the polarizing voltage. Applying the wrong polarizing voltage to the sensor can cause a negative current.

4.Replace the sensor membrane and electrolyte solution and clean the cathode if necessary. See the sensor instruction sheet for details.

5.Replace the sensor.

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Contents Model 5081-T Rev. Level Date Essential InstructionsModel 5081-T Table of Contents CONT’D Iii List of FiguresNumber Title List of Tables List of Figures CONT’DSimple Menu Structure Section Description and SpecificationsHart Recommended Ranges for Toroidal Sensors Recommended SensorsAtex Transmitter Display During Calibration and Programming I T N E X THart Interface Devices Overview of Hart CommunicationFoundation Fieldbus AMS Main Menu Tools Mechanical Installation Section InstallationUnpacking and Inspection Orienting the Display BoardMounting on a Flat Surface Pipe Mounting 40308103Sensor Selection Inductive LoopsModel 5081-T Sensor Selection Recommended SensorsPower Supply and Load Requirements. Refer to Figure Power SUPPLY/CURRENT LoopPower Supply-Current Loop Wiring Model 5081-T-HTTypical Fieldbus Network Electrical Wiring Configuration Power Supply Wiring for Model 5081-T-FF/FISensor Wiring Electrical Installation Section WiringSensor Wiring Wiring Through a Junction BOXPower Wiring Model 5081-T-FF Power Wiring Model 5081-T-HTWiring Model 242 sensor to Model 5081-T transmitter Electrical InstallationSection Section Section Intrinsically Safe & Explosion Proof IRC Infrared Remote ControlFM Explosion-Proof Installation for Model 5081-T-HT FM Intrinsically Safe Installation for Model 5081-T-HT CSA Intrinsically Safe Installation for Model 5081-T-HT Atex Intrisically Safe Label for Model 5081-T-HT Atex Intrisically Safe Label for Model 5081-T-HT FM Explosion-Proof Installation for Model 5081-T-FF FM Intrinsically Safe Installation for Model 5081-T-FF 10. CSA Intrinsically Safe Installation for Model 5081-T-FF 11. Atex Intrisically Safe Label for Model 5081-T-FF 12. Atex Intrinsically Safe Installation for Model 5081-T-FF FI-T 9241515-01 15. FM Intrinsically Safe Installation for Model 5081-T-FI 9241516-01 17. CSA Intrinsically Safe Installation for Model 5081-T-FI 18. Atex Intrisically Safe Label for Model 5081-T-FI 19. Atex Intrinsically Safe Installation for Model 5081-T-FI Displays Section Display and OperationS U I T N E X TInfrared Remote Controller Infrared Remote Controller IRC KEY FunctionsQuick Start for Model 5081-T-HT Hart To reset transmiter to factory default settingsQuick Start for Model 5081-T-FF/FI Foundation Fieldbus 25.0C 12.00mA Menu Tree ConductivityProcess Display Calibration ProgramProgram Menu Mnemonics Default Settings Diagnostic MessagesDefault Settings for Model 5081-T-HT Security Using HoldEntering the Security Code Retrieving a Lost Security CodeSection START-UP and Calibration Accessing the Calibrate MenuModel 5081-T-FF Calibrate Menu9URU ProcedureTemp Slope Output CalU17!91 5ES-U1GM!91 U91Model 5081-T-HT Model 5081-T-FF Section ProgramingGeneral Definitions Output 5081-HT onlyPurpose 9VUVU Procedure4QG UhtuU7-P Process temperature is. Press Enter to saveTemp G5-A DisplayHCL H2SO4LGgshtt HartPVO!RUT!!% Setup CustSHI 8VO!UTSetting Measurement Range Over Range Warning Limit DefaultRange G12-UPID Section Foundation Fieldbus OperationSection Operation with Model Connecting the CommunicatorOff-line and On-line Operation Making Hart related settings from the keypadOperation C/T-HT HART/Model 375 Menu Tree 1 PV LRV PV URVC/T-HT HART/Model 375 Menu Tree 2 LSL USLAO1 LRV URVC/T-HT HART/Model 375 Menu Tree 4 PV AO PV LRV PV URVBlockerr Featuresel Rsstate Faultstate Resource FaultstateLimnotify MaxnotifyStrev AlarmhysBlockerr TagdescPvftime Alertkey HihilimLowcut Strev Statusopts StrategyLolopri LolimLololim IooptsRate Reset ResetSphilim Splolim Bkcalhys FfgainBypass BaltimeSphilim ControloptsStrev Rate Tagdesc Alertkey OuthilimDvlopri DvhipriC/T-FF/FI Model 375 Menu Tree 9 C/T-FF/FI Model 375 Menu Tree 10 Current Operating Menu Section Diagnosis and TroubleshootingOverview Tqiu DLS4DSG IdvnutNON- Disabling Warnings Fault ConditionsDisabling Faults 9IITHU!1SS 9WHS!S-PJ1Hssqs Quick Troubleshooting Guide Quick Troubleshooting GuideSymptom Action Field TroubleshootingTroubleshooting Flow Chart Systematic TroubleshootingFormula RTD Resistance ValuesExample RTD Resistance ValuesWhen a Fault exists When a Warning condition existsTemp HI Troubleshooting When a Fault or Warning Message is ShowingTemp LO CPU FailRtd FAIL, Temp HI, and Temp LO CPU Fail and ROM Fail Preventative Maintenance Section MaintenanceTransmitter Maintenance 0 C 2 1 0 % mAExploded View of Model 5081-T Transmitter Replacement Parts for Model 5081-T TransmitterConductivity Section Theory of OperationHart Communication Output LogicNON-WARRANTY Repair Warranty RepairSection Return of Material GeneralThis page intentionally left blank Return of Material WarrantySpecifications subject to change without notice