Calibration Errors | Emerson Process Management 3081 pH/ORP guide

MODEL 3081 pH/ORP	SECTION 12.0
	TROUBLESHOOTING

12.2 CALIBRATION ERRORS

If an error occurs during calibration, an error message appears in the main display, and the transmitter does not update the calibration. The calibration errors are Std Err, SLOPE Err LO, and SLOPE Err HI. See Section 12.4 for an explana- tion of the error messages and suggested ways of correcting the problem.

12.3 TROUBLESHOOTING - GENERAL

Troubleshooting is easy as 1, 2, 3 . . .

Step 1 Look for a diagnostic message on the display to help identify the problem. Refer to Section 12.4 for an explana- tion of the message and a list of the possible problems that triggered it.

Step 2 Refer to Section 12.5 for common measurement problems and the recommended actions to resolve them.

Step 3 Follow the step by step troubleshooting approach, offered in Section 12.6, to diagnose and correct less common or more complex problems.

12.4 TROUBLESHOOTING WHEN A DIAGNOSTIC MESSAGE IS SHOWING

The Model 3081 pH/ORP transmitter continuously monitors the measurement loop (sensor and transmitter) for problems. If a problem is detected, the transmitter displays a fault or error message. The message appears in the temperature/out- put area of the main display. The table lists each diagnostic message and the section to consult for help.

	MESSAGE	SECTION
	GLASSFAIL	12.4.1
	GLASSWArn	12.4.2
	rEF FAIL	12.4.3
	rEF WArn	12.4.4
	CALIbrAtE	12.4.5
	tEMP HI	12.4.6
	tEMP LO	12.4.6
	LInE FAIL	12.4.7
	InPUt WArn	12.4.8
	SLOPE Err LO	12.4.9
	SLOPE Err HI	12.4.10
	Std Err	12.4.11
	rOM FAIL	12.4.12
	CPU FAIL	12.4.12
	AdC WArn	12.4.13
	CyCLE PWr	12.4.13
	WrItE Err	12.4.14
	FACt FAIL	12.4.15

90

Image 104

Emerson Process Management 3081 pH/ORP Calibration Errors, Troubleshooting is easy as 1, 2, Message Section

Contents

Model 3081 pH/ORP Essential Instructions What YOU Need to Know Use the Quick Start Guide if Base ModelRTD Preamplifier located Model Option note Quick Start Guide for Model 3081pH/ORP Output Optional WiringPower up and Calibration 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 13.0 11414.0 120 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 Section Description and SpecificationsFeatures Model 275 Hart COMMUNICATOR. The Model AccessoriesYear 2000 Compliance Millennium Status Specifications -GENERAL for Model 3081 pH/ORP Intrinsic SafetyConduit Openings 3/4 in. Fnpt Hazardous Area Classification Explosion Proof PH Input Range 0 to 14 pH Specifications ORPOrdering Information Model 3081 pH/ORP TRANSMITTER-SENSOR Compatibility Chart Preamplifier LocationSensor-mounted Remote Model ORP MODEL/PN Description Shipping Weight Section Installation PRE-INSTALLATION Setup 2.2.1 Transmitter Default SettingsTemperature Element 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 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 396P Sensors Junction Box Wiring Diagrams for Model 389 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 CSA. forInstallation 3081Model TransmitterpH/ORPPage Page I T N E X T T E R Section Operation with Remote ControllerDisplays Infrared Remote Controller IRC KEY Functions Infrared Remote Controller Menu Tree for pH Diagnostic Messages ORP Menu Tree ORP Retrieving a Lost Security Code SecurityEntering the Security Code Connecting the Hart Communicator Operation Section Operation with Model 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 Temperature Calibration ProcedurePurpose TEMP AdJ Use of Calibration Standards buffers Auto CalibrationWhat Happens During Auto Calibration? CAL bF 10.00 Manual Calibration 10.00 What Happens During Standardization? Making the Transmitter Reading Match a Second pHMeter 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 GFH GwjhGwjl GFL RFH RWJHRWJL RFL Temperature Related Settings TEMP TAUtOTMAn TC 1 Display Units DISPLAYTYPE Code Buffer Calibration Parameters M E BUFFErBAUtO Isopotential Parameters Snr ISOPOtntALTCOEFF 000 TESt Generating a Test CurrentSIM OUtPUt 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 Overview Section MaintenanceTransmitter Maintenance PH Sensor Maintenance Frequency of CleaningCleaning Procedures Problem Cleaning Suggestions Checking the Reference Electrode Rejuvenating Reference Electrodes 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 Troubleshooting Flowchart Glassfail Glassfail Slope Condition of Sensor Troubleshooting Flowchart GLASSWArn Slope Status of SensorGLASSWArn REF Fail Troubleshooting Flowchart rEF Fail Troubleshooting Flowchart rEF WArn Troubleshooting Flowchart- tEMP HI and tEMP LOREFWArn 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 Troubleshooting Flowchart-SLOPE Err HI Troubleshooting Flowchart-Std ErrSlope Err HI Std Err Troubleshooting-AdC WArn or CyCLE PWr Troubleshooting-WritE ErrROM Fail or CPU Fail AdC WArn or CyCLE PWr 102 Symptom SectionFACt Fail 12.5.1 Id 000 in Display 103 104 PH Reading in Buffer Drifts During Manual CalibrationSensor Does Not Respond To Known pH Changes 105 Temperature Reading Is Inaccurate Hart Communications ProblemsNo Display Display Segments Missing Replace the display board PN 106 12 .13 Transmitter Locks Up 12 .14 Transmitter Periodically Restarts Itself YES OK? Diagnostic Messages Testing the Transmitter by Simulating the pHDiagnostic Measurements Voltage mV 111 PH Simulation with the Model 381+ Sensor Simulate pH through Model 381+ Sensor Preamplifier 112 Return of Materials PH Simulation When Preamplifier is in SensorTroubleshooting Assistance PH Measurements 115 Measuring ElectrodeReference Electrode Liquid Junction Potential 116 Glass Electrode Slope Buffers and CalibrationTemp C Slope mV/unit pH 117 Junction Potential Mismatch 118 119 Sensor DiagnosticsSHIELDS, INSULATION, and Preamplifiers Section ORP Measurements General Measuring Electrode Reference ElectrodeLiquid Junction Potential 121 122 Relating Cell Voltage to ORP14.6 ORP, CONCENTRATION, and pH 123 Interpreting ORP MeasurementsORP,mV VI,Chromiumppm Sulfur dioxide added Calibration 124 125 Hart Interface Devices Section Theory Remote CommunicationsOverview of Hart Communication Asset Management Solutions AMS Main Menu Tools 127 Section Glossary Term Definition 129 Hart 130 ORP 131 RTD 132 133 Section Return of Material Warranty RepairNON-WARRANTY Repair Warranty Return of Material ON-LINE Ordering NOW Available on OUR WEB Site