DIAGnOSTIC | Emerson Process Management 3081 pH/ORP guide

MODEL 3081 pH/ORP

PROGRAM

dIAGnOSTIC

EXIT NEXT ENTER

PROGRAM

rOFFSt	0	60
EXIT		ENTER


PROGRAM
d I A G
d I A G	OFF
EXIT		ENTER

SECTION 10.0

PROGRAMMING FOR ORP MEASUREMENTS

10.4.3 Procedure

1. Press PROG on the infrared remote controller (IRC).

2. Press NEXT until the diAGnOStIC sub-menu appears. Press ENTER .

3. The screen displays the rOFFSt prompt. Use the editing keys to change the flashing display to the desired standardization (reference) offset (in millivolts). The range is 0 to 1000 mV. Press ENTER to save.

4. The dIAG prompt appears. Use the Ï or Ð keys to enable (On) or disable (OFF) the sensor diagnostics. Press ENTER to save.

PROGRAM
I M P t C	ON

EXIT NEXT ENTER

PROGRAM

rEF	LO
EXIT	ENTER

5. The IMPtC prompt appears. Use the Ï or Ð keys to enable (On) or disable (OFF) glass impedance temperature compensation. Because glass impedance is a strong function of temperature, correcting glass impedance for temperature is recommended. A third set- ting (SPC) appears in addition to On and OFF. Do not select SPC; the setting is intend- ed for factory use. Press ENTER to save.

6. The rEF prompt appears. Press Ï or Ð until the desired setting appears. LO identifies a low impedance reference electrode, and HI identifies a high impedance reference electrode. Press ENTER to save. Selecting LO disables the low impedance warning and failure limits for the reference electrode.

NOTE

PROGRAM

rFH

EXIT

1400

ENTER

Be sure the jumpers on the analog board are set to match the reference electrode impedance. See Section 2.2, Pre-Installation Set Up.

7.The rFH prompt appears. Use the editing keys to change the display to the desired ref- erence electrode high impedance fault value. The allowed ranges are

Type of reference electrode	Allowed range
Low impedance (LO in step 6)	0	- 2000 kilohms
High impedance (HI in step 6)	0	- 2000 megohms

Entering 0000 disables the feature. When the reference electrode impedance goes above the fault value, the transmitter displays the diagnostic message rEFFAIL and sets a fault condition. Press ENTER to save.

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Image 94

Emerson Process Management 3081 pH/ORP instruction manual DIAGnOSTIC

Contents

Model 3081 pH/ORP Essential Instructions What YOU Need to Know RTD Use the Quick Start Guide ifBase Model Preamplifier located Model Option note Quick Start Guide for Model 3081pH/ORP Power up and Calibration WiringOutput Optional Automatic Buffer Calibration Standardizing to Match a Reference Instrument Calibrate Program Diagnose Menu Tree for pH Technical Support Hotline Table of Contents Model 3081 PH/ORP Microprocessor Transmitter Table of Contents CONT’D 14.0 13.0114 120 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 Features Description and SpecificationsSection Year 2000 Compliance Millennium Status AccessoriesModel 275 Hart COMMUNICATOR. The Model Conduit Openings 3/4 in. Fnpt Specifications -GENERAL for Model 3081 pH/ORPIntrinsic Safety Hazardous Area Classification Explosion Proof Ordering Information Specifications ORPPH Input Range 0 to 14 pH Sensor-mounted Remote Model 3081 pH/ORP TRANSMITTER-SENSOR Compatibility ChartPreamplifier Location Model ORP MODEL/PN Description Shipping Weight Temperature Element Section InstallationPRE-INSTALLATION Setup 2.2.1 Transmitter Default Settings Unpacking and Inspection Changing Switch and Jumper Positions Preamplifier Location 40308110 Mechanical Installation 2.4.1 General information Orienting the Display Board Mounting on a Flat Surface. See Figure Mounting the Model 3081 pH/ORP Transmitter on a Flat Surface 40308103 Pipe Mounting Power Supply and Load Requirements. Refer to Figure Power SUPPLY/CURRENT LoopPower Supply-Current Loop Wiring. Refer to Figure General Information Wiring Diagrams Section WiringGeneral Information Wire Function Wiring Diagram Wiring Diagrams for pH and ORP SensorsWiring Diagrams for Model 396R Sensors Junction Box Wiring Diagrams for Model 396P Sensors Junction Box Wiring Diagrams for Model 389 Sensors Junction Box Wire Functions Wiring Diagrams for Model 385+ Sensors Junction BoxWire 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 Explosion Proof Installations Intrinsically Safe InstallationsSection Intrinsically Safe & Explosion Proof Fmrc Installation for Model 3081 pH/ORP Transmitter Page CSA. forInstallation 3081Model TransmitterpH/ORPPage Page Displays Section Operation with Remote ControllerI T N E X T T E R Infrared Remote Controller IRC KEY Functions Infrared Remote Controller Menu Tree for pH Diagnostic Messages ORP Menu Tree ORP Entering the Security Code SecurityRetrieving a Lost Security Code Connecting the Hart Communicator Operation Section Operation with Model Menu Tree Off-line and On-line OperationFast Key Sequences Is on 2b. pH Menu Tree Hart 3a. ORP Menu Tree Hart 3b. ORP Menu Tree Hart General Using the Hold FunctionEntering and Leaving the Calibrate Menu Purpose Temperature CalibrationProcedure TEMP AdJ What Happens During Auto Calibration? Auto CalibrationUse of Calibration Standards buffers CAL bF 10.00 Manual Calibration 10.00 Meter Standardization Making the Transmitter Reading Match a Second pHWhat Happens During Standardization? Std Slope Programming for pH Measurements Entering and Leaving the Program Menu PH Settings List Mnemonic Display Limits Factory Settings User Settings Output Ranging Definitions 4MA Diagnostic Parameters Suggested Glass Impedance Warning and Failure Limits Section Gwjl GFHGwjh GFL RWJL RFHRWJH RFL Temperature Related Settings TMAn TEMPTAUtO TC 1 TYPE Display UnitsDISPLAY Code Buffer Calibration Parameters BAUtO BUFFErM E Isopotential Parameters TCOEFF 000 ISOPOtntALSnr SIM OUtPUt Generating a Test CurrentTESt Section Calibration of ORP Measurements TEMP AdJ 25.0 Preparation of ORP Standard Solutions Std Section Programming for ORP Measurements ORP Settings LIst Mnemonic Display Factory User Limits Settings Program Level Output Ranging 20MA 400 Diagnostic Parameters DIAGnOSTIC RWJH Temperature Element Definition Display Units Generating a Test Current Transmitter Maintenance Section MaintenanceOverview Cleaning Procedures PH Sensor MaintenanceFrequency of Cleaning Problem Cleaning Suggestions Checking the Reference Electrode Rejuvenating Reference Electrodes Calibration 11.5.1 General ORP Sensor Maintenance 11.4.1 Frequency of CleaningCalibration Frequency Testing the Transmitter by Simulating pH Section TroubleshootingFactory Assistance and Repairs Troubleshooting is easy as 1, 2 Calibration ErrorsMessage Section Troubleshooting Flowchart Glassfail Glassfail Slope Condition of Sensor GLASSWArn Troubleshooting Flowchart GLASSWArnSlope Status of Sensor REF Fail Troubleshooting Flowchart rEF Fail REFWArn Troubleshooting Flowchart rEF WArnTroubleshooting Flowchart- tEMP HI and tEMP LO CALIbrAtE Three-wire RTD RTD Resistance Values Temperature 3K Balco Troubleshooting Flowchart- LInE Fail LInE Fail Troubleshooting Flowchart-InPUt WArn InPUt WArn Troubleshooting Flowchart-SLOPE Err LO Slope Err LO Slope Err HI Troubleshooting Flowchart-SLOPE Err HITroubleshooting Flowchart-Std Err Std Err ROM Fail or CPU Fail Troubleshooting-AdC WArn or CyCLE PWrTroubleshooting-WritE Err AdC WArn or CyCLE PWr FACt Fail Symptom Section102 12.5.1 Id 000 in Display 103 Sensor Does Not Respond To Known pH Changes PH Reading in Buffer Drifts During Manual Calibration104 105 No Display Temperature Reading Is InaccurateHart Communications Problems Display Segments Missing Replace the display board PN 106 12 .13 Transmitter Locks Up 12 .14 Transmitter Periodically Restarts Itself YES OK? Diagnostic Measurements Testing the Transmitter by Simulating the pHDiagnostic Messages Voltage mV 111 PH Simulation with the Model 381+ Sensor Simulate pH through Model 381+ Sensor Preamplifier 112 Troubleshooting Assistance PH Simulation When Preamplifier is in SensorReturn of Materials PH Measurements Reference Electrode Measuring Electrode115 Liquid Junction Potential 116 Temp C Slope mV/unit pH Glass Electrode SlopeBuffers and Calibration 117 Junction Potential Mismatch 118 SHIELDS, INSULATION, and Preamplifiers Sensor Diagnostics119 Section ORP Measurements General Liquid Junction Potential Measuring ElectrodeReference Electrode 121 14.6 ORP, CONCENTRATION, and pH Relating Cell Voltage to ORP122 ORP,mV VI,Chromiumppm Sulfur dioxide added Interpreting ORP Measurements123 Calibration 124 125 Overview of Hart Communication Section Theory Remote CommunicationsHart Interface Devices Asset Management Solutions AMS Main Menu Tools 127 Section Glossary Term Definition 129 Hart 130 ORP 131 RTD 132 133 NON-WARRANTY Repair Warranty RepairSection Return of Material Warranty Return of Material ON-LINE Ordering NOW Available on OUR WEB Site