Emerson PN 51-1055pHC/rev.K instruction manual Measuring Reference Voltage

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MODEL SOLU COMP II

SECTION 8.0

 

TROUBLESHOOTING

8.9 MEASURING REFERENCE VOLTAGE

Some processes contain substances that poison or shift the potential of the reference electrode. Sulfide is a good example. Prolonged exposure to sulfide converts the reference electrode from a silver/silver chloride electrode to a silver/silver sulfide electrode. The change in reference voltage is several hundred millivolts. A good way to check for poisoning is to compare the voltage of the reference electrode with a silver/silver chloride electrode known to be good. The reference electrode from a new sensor is best. See Figure 8-7. If the reference electrode is good, the voltage difference should be no more than about 20 mV. A poisoned reference electrode usu- ally requires replacement.

FIGURE 8-7. Checking for a Poisoned Reference

Electrode.

Refer to the sensor wiring diagram to identify the reference leads. A laboratory silver/silver chloride electrode can be used in place of the second sensor.

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Contents Model Solu Comp Essential Instructions Quick Start Guide ORP Quick Reference Guide Model Solu Comp Table of Contents CONT’D List of TablesList of Figures IiiAbout This Document Section Description and Specifications Dimensions Terminal Connections Rating 26-14 AWG wire sizeHazardous Location Ordinary Location -68 onlyPerformance Specifications Analyzer Conductivity InputRecommended Sensors for Conductivity Range, µS/cm Cell constant, /cmToroidal Conductivity Codes -21 and/or Measurement Range see table belowPerformance Specifications Analyzer ORP Input Temperature Correction none requiredWhen used with conductivity -20-32 or Recommended Sensors for ORPRecommended Sensors Frequency Range 0.5 4000 HzRepeatability ±1% Loop Specifications with a Model 499A OZ Sensor Recommended SensorInput filter 1- 255 samples Measurement Range 0-10 ppm mg/LOrdering Information Model 1055 Solu Comp II AnalyzerCombination Guide Part Number Description Weight Section Installation InstallationUnpacking and Inspection General InformationPanel Mount Installation Panel MountingPipe Mount Installation Pipe MountingSurface Mount Installation Surface MountingSection Wiring POWER, ALARM, OUTPUT, and Sensor ConnectionsPreparing Conduit Openings Model Solu Comp Section Wiring Model Solu Comp Section Wiring 41055105 41055106 41055107 41055108 41055109 41055110 40105536 40105559 Section Display and Operation DisplayKeypad Programming and Calibrating the Solu Comp II Tutorial Using Hold SecuritySection Programming the Analyzer Default Settings Output Dampening Or 4 mA Mode SectionAlarm Section Sensors Output SectionDefault Settings Definitions Assigning Outputs 1Choose Output Configure Choose Output1 or Output2Choose 4-20 mA or 0-20 mA Choose Output Range. Choose Output1 or Output2Alarm Relays Must be Configured Before Assigning Setpoints Choose Alarm Configure Choose Measurement or TempChoose Alarm Setpoints Definitions pH/ORP Definitions conductivity/resistivity Choose Measurement Choose Soln Temp Corr or Sensor IsoptntlDefinitions pH OutputsAlarms Measurement Choose Noise Rejection Choose ResetAnalyzer Choose Default Display Procedure Choosing a LanguageProcedure Changing Screen Contrast Section Calibration IntroductionCalibrating Temperature Procedure PH at 25C Standards Nominal pH Calibration Slope and OffsetChoose Measurement Choose BufferCal EnterManual Calibration pH S1ManualCal? Standardization pH Choose Measurement Choose StandardizeEntering a Known Slope Value pH Preparation of ORP standard solutions ORP CalibrationCalibrating AN IN-SERVICE Sensor Conductivity Procedure-Calibration against a standard meter and cellChoose Measurement Choose InProcess Procedure-Calibration against a standard solution ProgramDisplay Calibrate? Placing a NEW Sensor in Service Conductivity Choose Measurement Choose CellConstCalibrating the Analyzer Conductivity Cell constant Conductivity µS/cm Resistor k ΩTo Reset the Factory Resistance CALIBRATION, see Section Section Maintenance Replacement PartsOverview Model Description See FigureExploded View of Solu Comp II Panel Mount Version Exploded View of Solu Comp II Pipe/Surface Mount Version Section Troubleshooting Overview Troubleshooting Using Fault CodesSimulating Inputs Conductivity Simulating Temperature Absolute Value of Measured Voltage Exceeds 2500 mVPH Sensitive Glass Membrane is Broken Conductivity Sensor Open or ShortedRTD Sense Line for Sensor 1 or Sensor 2 is Open Eeprom FailureProblem See Section Calibration Error During Two-Point CalibrationCalibration Error during Standardization Invalid Input While Manually Entering SlopeSensor Does Not Respond to Known pH Changes Model Solu Comp Section Troubleshooting Calibration Error Using Standard Resistors Alarm Relays Do Not Work Measurement seems wrongConductivity, µS/cm Cell constant, /cm Current Output Too LowSimulating pH input when the preamplifier is in the sensor GeneralPreamplifier is in the Sensor Set the temperature correction to raw Section Simulating Inputs ConductivitySimulating temperature Three-Wire RTD ConfigurationMeasuring Reference Voltage Checking for a Poisoned Reference ElectrodeWarranty Repair NON-WARRANTY RepairSection Return of Material GeneralWarranty Specifications subject to change without notice

PN 51-1055pHC/rev.K specifications

The Emerson PN 51-1055pHC/rev.K is a highly advanced and reliable component designed for a wide range of applications in industrial automation and control systems. This device is known for its robust performance, exceptional durability, and integration of cutting-edge technologies, making it an ideal choice for demanding operational environments.

One of the key features of the PN 51-1055pHC/rev.K is its versatility. It is compatible with various systems and can be easily integrated into existing configurations without the need for extensive modifications. This adaptability allows users to streamline their operations and enhance overall efficiency, ensuring that the PN 51-1055pHC/rev.K is suitable for diverse industrial scenarios.

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In summary, the Emerson PN 51-1055pHC/rev.K stands out for its versatility, advanced sensor technologies, rugged design, user-friendly interface, and communication capabilities. It is a powerful tool for businesses seeking improved automation and control, helping to drive efficiency and enhance operational reliability in any industrial setting.
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