LInE Fail | Emerson Process Management 3081 pH/ORP instruction

MODEL 3081 pH/ORP	SECTION 12.0
	TROUBLESHOOTING

C.Check the transmitter.

1.Disconnect the RTD sensor leads and wire the circuit shown in Figure 12-4. Set the resistance to the value for 25°C shown in Table 12-1. The measured temperature should equal 25°C to within ±1°C.

FIGURE 12-4. Temperature simulation into

the Model 3081 pH/ORP transmitter.

If the measured temperature is correct, the transmitter is working properly.

If the measured temperature is incorrect, calibrate the transmitter against the standard resistance equivalent to 25°C. See Section 7.4 for the procedure. Change the resistance and verify that the temperature reading changes to the correct value.

If the transmitter works properly after temperature calibration, the original calibration was in error. Re-attach the RTD wires and check the temperature performance of the sensor.

If the reading is still wrong, the transmitter electronics have failed. Replace the electronic board stack (PN 23574-02).

12.4.7 LInE FAIL

LInE FAIL almost always means that the transmitter is measuring an incorrect resistance between terminal TB-3 (RTD RTN) and TB-4 (RTD SNS). These terminals are critical connections for the three-wire RTD measurement. Figure 12-3 shows a three-wire RTD connection.

Troubleshooting Flowchart- LInE FAIL

A.Check for miswires and open connections at TB-3 and TB-4. Open connections can be caused by loose connections, poor spade crimps, or broken wires. Be sure to check junction boxes for proper pass through of all wires. See Section 3.0 for junction box wiring.

If correcting a wiring problem makes the message disappear, the system is in good condition. If the message is still showing go to step B.

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Emerson Process Management 3081 pH/ORP instruction manual Troubleshooting Flowchart- LInE Fail

Contents

Model 3081 pH/ORP Essential Instructions What YOU Need to Know Preamplifier located Model Option note Use the Quick Start Guide ifBase Model RTD Quick Start Guide for Model 3081pH/ORP Wiring Power up and CalibrationOutput Optional Standardizing to Match a Reference Instrument Automatic Buffer Calibration Menu Tree for pH Technical Support Hotline Calibrate Program Diagnose Model 3081 PH/ORP Microprocessor Transmitter Table of Contents Table of Contents CONT’D 120 13.0114 14.0 Table of Contents CONT’D List of Figures Table of Contents CONT’D List of Figures CONT’D Table of Contents CONT’D List of Tables Description and Specifications FeaturesSection Accessories Year 2000 Compliance Millennium StatusModel 275 Hart COMMUNICATOR. The Model Hazardous Area Classification Explosion Proof Specifications -GENERAL for Model 3081 pH/ORPIntrinsic Safety Conduit Openings 3/4 in. Fnpt Specifications ORP Ordering InformationPH Input Range 0 to 14 pH Model ORP Model 3081 pH/ORP TRANSMITTER-SENSOR Compatibility ChartPreamplifier Location Sensor-mounted Remote MODEL/PN Description Shipping Weight Unpacking and Inspection Section InstallationPRE-INSTALLATION Setup 2.2.1 Transmitter Default Settings Temperature Element Preamplifier Location Changing Switch and Jumper Positions 40308110 Orienting the Display Board Mechanical Installation 2.4.1 General information Mounting the Model 3081 pH/ORP Transmitter on a Flat Surface Mounting on a Flat Surface. See Figure Pipe Mounting 40308103 Power SUPPLY/CURRENT Loop Power Supply and Load Requirements. Refer to FigurePower Supply-Current Loop Wiring. Refer to Figure Section Wiring General Information Wiring DiagramsGeneral Information Wiring Diagrams for pH and ORP Sensors Wire Function Wiring DiagramWiring Diagrams for Model 396R Sensors Junction Box Wiring Diagrams for Model 389 Sensors Junction Box Wiring Diagrams for Model 396P Sensors Junction Box Wiring Diagrams for Model 385+ Sensors Junction Box Wire FunctionsWire Functions Wiring Diagram Jumpers Supplied by Customer Section Section Section 15. Wire functions for Model 385+ 17. Wire functions for Model 328A-07 19. Wiring diagram for Model 320HP-10-55 21. Wire Functions for Model Section 24. Preparation of Raw Connecting Cable PN Sensor Flow Chart on Sensor Flow Chart on Sensor Flow Chart Intrinsically Safe Installations Explosion Proof InstallationsSection Intrinsically Safe & Explosion Proof Fmrc Installation for Model 3081 pH/ORP Transmitter Page 3081Model TransmitterpH/ORP CSA. forInstallationPage Page Section Operation with Remote Controller DisplaysI T N E X T T E R Infrared Remote Controller Infrared Remote Controller IRC KEY Functions Menu Tree for pH Menu Tree ORP Diagnostic Messages ORP Security Entering the Security CodeRetrieving a Lost Security Code Section Operation with Model Connecting the Hart Communicator Operation Off-line and On-line Operation Menu TreeFast Key Sequences Is on 2b. pH Menu Tree Hart 3a. ORP Menu Tree Hart 3b. ORP Menu Tree Hart Using the Hold Function GeneralEntering and Leaving the Calibrate Menu TEMP AdJ Temperature CalibrationProcedure Purpose Auto Calibration What Happens During Auto Calibration?Use of Calibration Standards buffers 10.00 CAL bF Manual Calibration 10.00 Making the Transmitter Reading Match a Second pH Meter StandardizationWhat Happens During Standardization? Slope Std Entering and Leaving the Program Menu Programming for pH Measurements Mnemonic Display Limits Factory Settings User Settings PH Settings List Definitions Output Ranging 4MA Suggested Glass Impedance Warning and Failure Limits Diagnostic Parameters Section GFL GFHGwjh Gwjl RFL RFHRWJH RWJL Temperature Related Settings TC 1 TEMPTAUtO TMAn Code Display UnitsDISPLAY TYPE Buffer Calibration Parameters BUFFEr BAUtOM E Isopotential Parameters ISOPOtntAL TCOEFF 000Snr Generating a Test Current SIM OUtPUtTESt Section Calibration of ORP Measurements 25.0 TEMP AdJ Std Preparation of ORP Standard Solutions Section Programming for ORP Measurements Mnemonic Display Factory User Limits Settings Program Level ORP Settings LIst Output Ranging 20MA 400 Diagnostic Parameters DIAGnOSTIC RWJH Definition Temperature Element Display Units Generating a Test Current Section Maintenance Transmitter MaintenanceOverview Problem Cleaning Suggestions PH Sensor MaintenanceFrequency of Cleaning Cleaning Procedures Rejuvenating Reference Electrodes Checking the Reference Electrode ORP Sensor Maintenance 11.4.1 Frequency of Cleaning Calibration 11.5.1 GeneralCalibration Frequency Section Troubleshooting Testing the Transmitter by Simulating pHFactory Assistance and Repairs Calibration Errors Troubleshooting is easy as 1, 2Message Section Glassfail Troubleshooting Flowchart Glassfail Slope Condition of Sensor REF Fail Troubleshooting Flowchart GLASSWArnSlope Status of Sensor GLASSWArn Troubleshooting Flowchart rEF Fail CALIbrAtE Troubleshooting Flowchart rEF WArnTroubleshooting Flowchart- tEMP HI and tEMP LO REFWArn RTD Resistance Values Temperature 3K Balco Three-wire RTD LInE Fail Troubleshooting Flowchart- LInE Fail InPUt WArn Troubleshooting Flowchart-InPUt WArn Slope Err LO Troubleshooting Flowchart-SLOPE Err LO Std Err Troubleshooting Flowchart-SLOPE Err HITroubleshooting Flowchart-Std Err Slope Err HI AdC WArn or CyCLE PWr Troubleshooting-AdC WArn or CyCLE PWrTroubleshooting-WritE Err ROM Fail or CPU Fail Symptom Section FACt Fail102 103 12.5.1 Id 000 in Display PH Reading in Buffer Drifts During Manual Calibration Sensor Does Not Respond To Known pH Changes104 105 Display Segments Missing Replace the display board PN 106 Temperature Reading Is InaccurateHart Communications Problems No Display 12 .14 Transmitter Periodically Restarts Itself 12 .13 Transmitter Locks Up YES OK? Testing the Transmitter by Simulating the pH Diagnostic MeasurementsDiagnostic Messages 111 Voltage mV Simulate pH through Model 381+ Sensor Preamplifier 112 PH Simulation with the Model 381+ Sensor PH Simulation When Preamplifier is in Sensor Troubleshooting AssistanceReturn of Materials PH Measurements Measuring Electrode Reference Electrode115 116 Liquid Junction Potential 117 Glass Electrode SlopeBuffers and Calibration Temp C Slope mV/unit pH 118 Junction Potential Mismatch Sensor Diagnostics SHIELDS, INSULATION, and Preamplifiers119 General Section ORP Measurements 121 Measuring ElectrodeReference Electrode Liquid Junction Potential Relating Cell Voltage to ORP 14.6 ORP, CONCENTRATION, and pH122 Interpreting ORP Measurements ORP,mV VI,Chromiumppm Sulfur dioxide added123 124 Calibration 125 Section Theory Remote Communications Overview of Hart CommunicationHart Interface Devices AMS Main Menu Tools 127 Asset Management Solutions Term Definition Section Glossary 129 130 Hart 131 ORP 132 RTD 133 Warranty Repair NON-WARRANTY RepairSection Return of Material Return of Material Warranty ON-LINE Ordering NOW Available on OUR WEB Site