13.0, 114, 14.0, 120, 15.0 | Emerson Process Management 3081 pH/ORP

MODEL 3081 pH/ORP

TABLE OF CONTENTS

	TABLE OF CONTENTS CONT’D
13.0	pH MEASUREMENTS	114
13.1	General	114
13.2	Measuring Electrode	115
13.3	Reference Electrode	115
13.4	Liquid Junction Potential	116
13.5	Converting Voltage to pH	116
13.6	Glass Electrode Slope	117
13.7	Buffers and Calibration	117
13.8	Isopotential pH	118
13.9	Junction Potential Mismatch	118
13.10	Sensor Diagnostics	119
13.11	Shields, Insulation, and Preamplifiers	119
14.0	ORP MEASUREMENTS	120
14.1	General	120
14.2	Measuring Electrode	121
14.3	Reference Electrode	121
14.4	Liquid Junction Potential	121
14.5	Relating Cell Voltage to ORP	122
14.6	ORP, Concentration, and pH	122
14.7	Interpreting ORP Measurements	123
14.8	Calibration	124
15.0	THEORY - REMOTE COMMUNICATIONS	126
15.1	Overview of HART Communications	126
15.2	HART Interface Devices	126
15.3	AMS Communication	127
16.0	GLOSSARY	128
17.0	RETURN OF MATERIAL	134

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Emerson Process Management 3081 pH/ORP instruction manual 13.0, 114, 14.0, 120, 15.0, 126, 16.0, 128, 17.0, 134, Iii

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 Output Optional WiringPower up and Calibration 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 Section Description and SpecificationsFeatures Model 275 Hart COMMUNICATOR. The Model AccessoriesYear 2000 Compliance Millennium Status Hazardous Area Classification Explosion Proof Specifications -GENERAL for Model 3081 pH/ORPIntrinsic Safety Conduit Openings 3/4 in. Fnpt PH Input Range 0 to 14 pH Specifications ORPOrdering Information 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 Wiring. Refer to Figure Power SUPPLY/CURRENT LoopPower Supply and Load Requirements. Refer to Figure General Information Section WiringGeneral Information Wiring Diagrams Wiring Diagrams for Model 396R Sensors Junction Box Wiring Diagrams for pH and ORP SensorsWire Function Wiring Diagram Wiring Diagrams for Model 389 Sensors Junction Box Wiring Diagrams for Model 396P Sensors Junction Box Wire Functions Wiring Diagram Wiring Diagrams for Model 385+ Sensors Junction BoxWire Functions 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 Section Intrinsically Safe & Explosion Proof Intrinsically Safe InstallationsExplosion Proof Installations Fmrc Installation for Model 3081 pH/ORP Transmitter Page 3081Model TransmitterpH/ORP CSA. forInstallationPage Page I T N E X T T E R Section Operation with Remote ControllerDisplays Infrared Remote Controller Infrared Remote Controller IRC KEY Functions Menu Tree for pH Menu Tree ORP Diagnostic Messages ORP Retrieving a Lost Security Code SecurityEntering the Security Code Section Operation with Model Connecting the Hart Communicator Operation Fast Key Sequences Off-line and On-line OperationMenu Tree Is on 2b. pH Menu Tree Hart 3a. ORP Menu Tree Hart 3b. ORP Menu Tree Hart Entering and Leaving the Calibrate Menu Using the Hold FunctionGeneral TEMP AdJ Temperature CalibrationProcedure Purpose Use of Calibration Standards buffers Auto CalibrationWhat Happens During Auto Calibration? 10.00 CAL bF Manual Calibration 10.00 What Happens During Standardization? Making the Transmitter Reading Match a Second pHMeter 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 M E BUFFErBAUtO Isopotential Parameters Snr ISOPOtntALTCOEFF 000 TESt Generating a Test CurrentSIM OUtPUt 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 Overview Section MaintenanceTransmitter Maintenance Problem Cleaning Suggestions PH Sensor MaintenanceFrequency of Cleaning Cleaning Procedures Rejuvenating Reference Electrodes Checking the Reference Electrode Calibration Frequency ORP Sensor Maintenance 11.4.1 Frequency of CleaningCalibration 11.5.1 General Factory Assistance and Repairs Section TroubleshootingTesting the Transmitter by Simulating pH Message Section Calibration ErrorsTroubleshooting is easy as 1, 2 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 102 Symptom SectionFACt Fail 103 12.5.1 Id 000 in Display 104 PH Reading in Buffer Drifts During Manual CalibrationSensor Does Not Respond To Known pH Changes 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? Diagnostic Messages Testing the Transmitter by Simulating the pHDiagnostic Measurements 111 Voltage mV Simulate pH through Model 381+ Sensor Preamplifier 112 PH Simulation with the Model 381+ Sensor Return of Materials PH Simulation When Preamplifier is in SensorTroubleshooting Assistance PH Measurements 115 Measuring ElectrodeReference Electrode 116 Liquid Junction Potential 117 Glass Electrode SlopeBuffers and Calibration Temp C Slope mV/unit pH 118 Junction Potential Mismatch 119 Sensor DiagnosticsSHIELDS, INSULATION, and Preamplifiers General Section ORP Measurements 121 Measuring ElectrodeReference Electrode Liquid Junction Potential 122 Relating Cell Voltage to ORP14.6 ORP, CONCENTRATION, and pH 123 Interpreting ORP MeasurementsORP,mV VI,Chromiumppm Sulfur dioxide added 124 Calibration 125 Hart Interface Devices Section Theory Remote CommunicationsOverview of Hart Communication AMS Main Menu Tools 127 Asset Management Solutions Term Definition Section Glossary 129 130 Hart 131 ORP 132 RTD 133 Section Return of Material Warranty RepairNON-WARRANTY Repair Return of Material Warranty ON-LINE Ordering NOW Available on OUR WEB Site