Troubleshooting, Check pH Electrode System | Honeywell UDA2182

Operating the Analyzer

5.9.7Troubleshooting

In normal operation, both the direct electrode pH measurement and the pH from differential conductivity should very closely match each other.

If they DO NOT match each other, the possible causes are listed below:

1.Upsets in water chemistry, such as cation exchange resin exhaustion, can cause the pH readings to not agree with each other.

CHECK EXCHANGE RESIN

2.A low reboiler temperature will not be effective in removing dissolved CO2 resulting in an incorrect and low CO2 indication.

CHECK REBOILER TEMPERATURE

3.Nernst Electrode pH system failure will cause the two readings to disagree. Electrode pH systems are more susceptible to failure than conductivity cells, and depleted reference electrodes (incorrectly LOW readings) or broken measuring electrodes (usually incorrectly HIGH readings) can occur.

CHECK pH ELECTRODE SYSTEM

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UDA2182 Universal Dual Analyzer Product Manual

January 2009

Image 52

Honeywell UDA2182 manual Troubleshooting, Check pH Electrode System

Contents

UDA2182 Universal Dual Analyzer Product Manual January WARRANTY/REMEDY Copyright 2008 by Honeywell Revision January Abstract ContactsWorld Wide Web Telephone Symbol Definitions Symbol Definition Contents 100 114 136 178 185189 191 239 Tables Figures Resetting ORP Offset Introduction Overview Outputs RelaysInfrared Communications Communications Card Optional Features Password protection Auto Clean/Auto CalDiagnostic/Failsafe Outputs High Noise Immunity Specifications SpecificationsUDA2182 Universal Dual Analyzer Resistive Load Rating 4A, 120/240 Vac CE Conformity Europe Declaration of Conformity Specifications Introduction Unpacking, Preparation, and MountingWhat’s in this section? Procedure Procedure for Unpacking and Preparing the UDA2182 Unpacking and PreparingMounting Step Action Panel Mounting Dimensions Panel Cutout Rear Panel Support Plate Dimensions Pipe Mounting Dimensions not to scale Pipe Mounting Wall Mounting Dimensions Wall Mounting Dimensions not to scale Power Wiring General Wiring Practices Safety precautionWiring for immunity compliance Avoid damage to components Power Wiring Considerations Installing Power Wiring Disengage from the terminal boards Power Wiring Operating the Analyzer Analyzer Overview UDA2182 Operator Interface all display items shown Key Navigation Function of KeysKey Function Displays Overview Online Functions Display Details Functions Process VariableValues Status Messages Input Displays Two Input Display Overview PID DisplaysSelecting Control Display To access the PID Parameters. You will see To access the value or selection of eachChanging Parameters on the PID Display Changing PID Parameters on the Display Access to Auto Cycle Displays Auto Cycle Displays How it works Displays Hold Active Probe TransitCycle Start Src Cycle Interval Manual Starting/Stopping the Auto Cycle To access the Auto Cycle Operator Panel. You will seeManually Starting/Stopping the Auto Cycle Output Hold State Enabled Auto Cycle FailStep AC n Extract Rinse Cal Condition Pharmacopoeia Test Procedure Pharma Display Access to Pharma Display Pharma Display screen example Displays To select Test µS/cm After Stage 2 is selected Selecting the Pharma Test on DisplayTo select Test pH After Stage 3 is selected Pharma Warning and Fail Signal Cation Calc Display UDA for Cation and Degassed CO2 How it works PH Calculation from Specific and Cation Conductivity Setup Degassed CO2 Calibration Access to Cation Display5 CO2 by Degassed Conductivity Troubleshooting Check pH Electrode System Access to Status Displays PID Alarm10Status Display Status Display Details Input Status OutputLevels Relay States Output of the Switch and Function Generator blocks Aux ValuesVariables Comm Status Configured Status Parameter Status Definition Display Read OnlyMACaddr Hi and MACaddr Low is the MAC address Auto Cycling Available only if both units of measure between Access to Event History Displays Setup Chg 04.19 Alarm 1 On 03.15 Hold On Power On 03.09Event History Press Until you see Clear Event History Features 12Process Instrument Explorer Software Infrared communications Modbus Communications SummarySerial port provides Ethernet port provides Configuration UDA2182 Block Diagram UDA2182 Block Diagram Accessing the Main Menu Main Setup MenuSetup Group Overview Configuration Basic Configuration Procedure General Rules for Editing Basic Configuration Procedure Enter Exit Signal Sources Analog and Digital Signal SourcesSignal Type Applies Source to Selections Analog Signal Sources Analog Signal Description Definition Digital Signal Sources Digital Signal Description Definition Out 2 Fault DgtlVar Accessing Inputs Menu Inputs ConfigurationInput Configuration Default = 77ºF Default = 25ºCNone default Default = Following important differences Sub-menu Parameter8550 Ω Therm Default to Cell Const Cell Const 0 NIST-default + ISO-Default +Cond Cond mS/m Selection Range Setting Only PV Type 000default NaCl default H2SO4 Default = None Default 10.000Pharma Timer begins to count down from Configured minutes value set here. When the Timer Input Do Concen Oxygen do concentration or percent saturation5000Ω Therm Manual Default = 20.000 Accessing Outputs Menu Outputs ConfigurationOutputs Configuration Parameters in engineering units Parameters in % Relays Configuration Overview Accessing Relays Menu Relays Configuration Frequency ON/OFF Pulse Output Alarms Configuration Range Switch using Math, Monitor, and Switch Blocks Alarms Configuration Accessing Alarms MenuHigh default Accessing Monitors Menu 10Monitors ConfigurationMonitors Configuration For Low Monitor 11Math Configuration Accessing Math Menu 10 Math Configuration Linear default Logic Configuration Accessing Logic Menu 11 Logic Configuration Latch Switch Auxiliary ConfigurationFunc Gen Function Generator 12 Auxiliary Configuration Accessing Auxiliary MenuSub-menu Parameter Selection or Range of Setting 99999 to 999999 Default= PID Control Configuration PID Tracking versus Manual ModeUsing Auto/Manual Switch PID Tracking Configuration Accessing Control Menu PIDn Config TablePIDnAlarms Table 13 PID Configuration Pida default Reverse defaultManualdefault Failsafe default Enable default 9999 to 14 PID Tuning PID 2 Tune Disable default No Alarm default 15 PID AlarmsPID 2 Alarms Same as Alarm 1 Setpoint 1 Type Setpoint No Alarm default Auto Cycling Configuration Accessing Auto Cycle MenuAuto Cycle 1 or Auto Cycle Input Board Type Auto Cycle Operation Auto Cycling Configuration 16 Auto Cycling Configuration Offdefault To 28 default = Default = Sunday To 31 default =To 59 default = To 100default = PH Auto Cycling Configuration Example 17 Example Auto Cycling Configuration for pHSelection Setting Resume Dly Mins Enable Resume Dly Mins Variables Configuration Accessing Variables Menu18 Variables Configuration Analog Accessing Communication Menu 17Communication Configuration19 Communication Configuration Ethernet Status display Accessing Maintenance Menu Maintenance Configuration20 Maintenance Configuration Loops default No defaultUnit Identification Option ID Number Nist default AWG defaultFeet default ISO/NIST factor Default Honeywell Default UDA2182 Hour default AM defaultOff default Tag Names Output action occurs when the Enter key is Inputs and Outputs Wiring Immunity compliance Recommended maximum wire size Recommended Maximum Wire Size Shielded wiring for locations with interferenceAvoiding interference References Accessing the terminals Inputs and Outputs Wiring terminals and board location Wiring Terminals and board Location Procedure Procedure for installing Input and Output wiring Direct pH/ORP Input Wiring Diagrams Durafet Durafet Glass Meredian Terminal Designations for Meredian II Electrode ORP HPW7000 Terminal Designations for HPW7000 System HB Series pH or ORP Terminal Designations for HB Series pH or ORP Glass Meredian External Preamp1 BlueGreen Black Durafet II External Preamp RTH 3rd Wire+ 10 Volt Supply Durafet II Cap Adapter Durafet III Cap Adapter Conductivity Brown Blue Dissolved Oxygen Ground screw Wire to chassis Cable shield VioletTo chassis ground screw Clear Yellow Communications Card RJ45 Ethernet Connection RS 485 Connection Power Supply/Analog Output/Relay Output Card Outputs Option Card 20 Terminal Designations for Option Board Input Calibration Calibration Menu Accessing the Main Calibration Menu and sub-menusInput PV Cal Input Temp Cal Output Cal Cal History PH/ORP Calibration PH/ORP and Conductivity OverviewConductivity Recommendations for Successful Measurement and Calibration Selection and care of electrode system or cell essential Using the restart screen PH Calibration Calibrating pH Electrodes Using Automatic Buffer recognition Calibration functions Standard pH Buffer Values NIST/USP default Step Action ScreenPress Use To select Input PV Cal Enter Press Enter when stable Step Action Screen Press EnterAuto Buffer Cal Place probe in Buffer Buffering Method of Calibrating pH Electrodes Buffer 2 stability check Procedure for Buffering Method of Calibrating pH Electrodes Step Action Screen PressInput PV Cal Enter Buffer Cal Press Enter when stable Procedure for Sample Method of Calibrating pH Electrodes Sample Method of Calibrating pH Electrodes Sample Cal Place probe in SampleSpecial instructions for high-purity water applications Change to Sample Value Resetting pH Offset and pH Slope ORP Calibration Using Reference Solution ORP Calibration Procedure This will standardize the unit ORP Calibration Using Voltage Input Procedure for Calibrating ORP Analyzer Using Voltage Input Press Reset ORP Offset Viewing and Resetting ORP OffsetSample Cal ORP Offset Conductivity Calibration Entering the Cal Factor for each cell Introduction Determining TDS conversion factor Out-of range-values forced to closest limit Performing Calibration Trim Introduction Conductivity of Potassium Chloride Solutions at 25 C Concentration M Conductivity microSiemens Per cm Error Messages Resetting Calibration Trim Sample Cal Cal Trim1.00 10 Procedure for Sample Method of Calibrating Cation pH Cation pH CalibrationInput PV Cal Enter Press Cation pH To recalibrate, press Enter Cal CompleteEnter = recal, Exit = exit Resetting pH Offset Sample Cal PH Offset0.00 Dissolved Oxygen Calibration Do’s and Don’ts for Dissolved Oxygen Calibration Use To select Input 1 or 2 do Cal Enter Air Cal Press Enter when ready Enter Place probe in airEnter Cal stability check Wait for cal complete January UDA2182 Universal Dual Analyzer Product Manual 169 Exit to cancel Enter to save when the valueEnter Place probe in sample 13 Calibrating the Integral Pressure Sensor Calibrating the Integral Pressure Sensor IntroductionPressure Cal Test initiation Running a Probe Bias Scan IntroductionPressure Sensor Cal 55V 80μA 240 160 ΜA 00 0.2 0.4 0.6 0.8 Display GraphInterpretation of figure shown above is as follows Procedure 14 Running a Probe Bias Scan January UDA2182 Universal Dual Analyzer Product Manual 175 176 Resetting Pressure Offset or Bias Volts IN1 do CAL Outputs Calibration Output Calibration Required equipment 180 Procedure Procedure for Calibrating Analyzer Outputs Use To select An Analog Output to be Calibrated Enter Step Action Screen Use To select MA Offset and repeatProcess Case Viewing and resetting 20mA and 4mA Offset Resetting Output 1 Offsets example Temperature Input Calibration 10.1Overview Procedure Procedure for Calibrating the Temperature Inputs Temperature Input CalibrationInput Temp Cal Enter Limit is ± 5ºC ± 9ºF Viewing and resetting Temperature Offset Resetting temperature offset Calibration History Overview Calibration Records Cal History items Clear Calibration History Diagnostics and Messages 12.1Overview Measurement Errors System Status MessagesStatus Messages = 1 or Probe Calibration Diagnostics Calibration DiagnosticsPH/ORP/DO Auto Cycle Fail Messages Auto Cycle Fail MessagesFail Message Reason 12.5Pharma Fail Messages Pharma Fail MessagesFail Condition Status Condition Ethernet and Communications 13.1Overview Accessories and Replacement Parts List 14.1Overview Part Numbers Part NumbersKit/Part Number Description Quantity Table of Contents Appendices Example of a Conductivity Loop January UDA2182 Universal Dual Analyzer Product Manual 201 Ft of 18 AWG coax January UDA2182 Universal Dual Analyzer Product Manual 203 Appendix C Cyanide Waste Treatment Uses of cyanide solutionsTechnique for cyanide destruction Raise pH and oxidize cyanide First Stage of Cyanide DestructionTitration curve Importance of pH control Reliable measurement with gold electrodeSecond Stage of Cyanide Destruction Neutralize and further oxidize cyanate Batch Treatment ORP Potential a Measure of Status of Reaction 15.5Appendix D Chrome Waste Treatment Use of ChromatesCorrosion inhibition Necessity for removal of chromium ion from wastewater First Stage of Chrome Removal Lower pH and add reducing agent Second Stage of Chrome Removal ORP Potential a Measure of Status January UDA2182 Universal Dual Analyzer Product Manual 211 Appendix E Two-cell Applications Ion ExchangeReverse Osmosis Conductivity/Resistivity/TDS Difference Parts Rinsing Steam Power Measurements Softener Monitor January UDA2182 Universal Dual Analyzer Product Manual 215 Set cal factor and calibration trim for ideal conditions Calculations for conductivity, resistivity, and TDS Concentration values Data for Concentration Range Measurements 15.8Appendix G Noise Testing, Dissolved Oxygen Application Hints for Reducing Noise 15.9Appendix H do Probe and Analyzer Tests Check for probe membrane leakage Check that analyzer is working January UDA2182 Universal Dual Analyzer Product Manual 221 Pressure TemperatureSalinity Faradaic Currents Residual CurrentsElectrode Conditioning Currents Charging Currents Sulfite Based Zero Testing Faradaic Interferences Dissolved Oxygen Solubility vs. Temperature 15.12Appendix K Percent Saturation Readout 15.13Appendix L Leak Detection in PPB Applications Oxygen Measurement Procedure Equipment Needed To Calculate True Value Example Calculation Typical Probe Installation 230 15.16Appendix O Auto Clean and Auto Cal Examples Automatic Cleaning and Calibration Auto Clean Setup 10 Auto Cal Setup Automatic Calibration of ppb Dissolved Oxygen Probe Appendix P AutoClean and AutoCal Theory and Piping AutoClean Sequence and Piping 11 Automatic Electrode Wash Setup AutoCal Sequence and Piping 12 Rinse and One-Point Calibration Two-Point AutoCal Operation 238 Index Conductivity Conductivity Calibration January UDA2182 Universal Dual Analyzer Product Manual 241 Power Supply/Analog Output/Relay Output Card...132 Y, Z 244 January UDA2182 Universal Dual Analyzer Product Manual 245 Asia Pacific