Emerson Process Management 3081 pH/ORP instruction

MODEL 3081 pH/ORP	SECTION 12.0
	TROUBLESHOOTING

12.8.4 pH Simulation with the Model 381+ Sensor

1.Verify that switch S-1 is set to "sensor or junction box". See Section 2.2.

2.Turn off sensor diagnostics. See Section 8.4.

3.Turn off automatic temperature compensation. Set manual temperature compensation to 25°C. See Section 8.5.

4.Refer to Figure 12-9 for connections to the sensor.

5.Remove the cover from the sensor. Leave the sensor cable connector attached.

6.Remove the glass electrode cable from the BNC connection at the preamplifier.

7.Connect one end of a jumper wire to the solution ground pin and connect the other end to the reference electrode pin. Both pins are underneath the preamplifier. Leave the preamplifier installed on the pins.

8.Connect one end of a second jumper wire to the reference electrode pin. Be sure the preamplifier remains connected to the pins.

9.Press DIAG on the IRC. The InPut voltage in millivolts will appear in the temperature-output area. The main display will show pH.

DWG. NO.

40381+05

REV.

A

FIGURE 12-9. Simulate pH through Model 381+ Sensor Preamplifier

112

Image 126

Emerson Process Management 3081 pH/ORP instruction manual PH Simulation with the Model 381+ Sensor

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 Wiring Power up and CalibrationOutput 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 Description and Specifications FeaturesSection Accessories Year 2000 Compliance Millennium StatusModel 275 Hart COMMUNICATOR. The Model Conduit Openings 3/4 in. Fnpt Specifications -GENERAL for Model 3081 pH/ORPIntrinsic Safety Hazardous Area Classification Explosion Proof Specifications ORP Ordering InformationPH 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/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 396P Sensors Junction Box Wiring Diagrams for Model 389 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 CSA. forInstallation 3081Model TransmitterpH/ORPPage Page Section Operation with Remote Controller DisplaysI 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 Security Entering the Security CodeRetrieving a Lost Security Code Connecting the Hart Communicator Operation Section Operation with Model 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 Purpose Temperature CalibrationProcedure TEMP AdJ Auto Calibration What Happens During Auto Calibration?Use of Calibration Standards buffers CAL bF 10.00 Manual Calibration 10.00 Making the Transmitter Reading Match a Second pH Meter StandardizationWhat 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 BUFFEr BAUtOM E Isopotential Parameters ISOPOtntAL TCOEFF 000Snr Generating a Test Current SIM OUtPUtTESt 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 Section Maintenance Transmitter MaintenanceOverview Cleaning Procedures PH Sensor MaintenanceFrequency of Cleaning Problem Cleaning Suggestions Checking the Reference Electrode Rejuvenating Reference Electrodes 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 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 Symptom Section FACt Fail102 12.5.1 Id 000 in Display 103 PH Reading in Buffer Drifts During Manual Calibration Sensor Does Not Respond To Known pH Changes104 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? Testing the Transmitter by Simulating the pH Diagnostic MeasurementsDiagnostic Messages Voltage mV 111 PH Simulation with the Model 381+ Sensor Simulate pH through Model 381+ Sensor Preamplifier 112 PH Simulation When Preamplifier is in Sensor Troubleshooting AssistanceReturn of Materials PH Measurements Measuring Electrode Reference Electrode115 Liquid Junction Potential 116 Temp C Slope mV/unit pH Glass Electrode SlopeBuffers and Calibration 117 Junction Potential Mismatch 118 Sensor Diagnostics SHIELDS, INSULATION, and Preamplifiers119 Section ORP Measurements General Liquid Junction Potential Measuring ElectrodeReference Electrode 121 Relating Cell Voltage to ORP 14.6 ORP, CONCENTRATION, and pH122 Interpreting ORP Measurements ORP,mV VI,Chromiumppm Sulfur dioxide added123 Calibration 124 125 Section Theory Remote Communications Overview of Hart CommunicationHart Interface Devices Asset Management Solutions AMS Main Menu Tools 127 Section Glossary Term Definition 129 Hart 130 ORP 131 RTD 132 133 Warranty Repair NON-WARRANTY RepairSection Return of Material Warranty Return of Material ON-LINE Ordering NOW Available on OUR WEB Site