Emerson PN 51-1055pHC/rev.K Section Troubleshooting, Overview Troubleshooting Using Fault Codes

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MODEL SOLU COMP II

SECTION 8.0

 

TROUBLESHOOTING

SECTION 8.0

TROUBLESHOOTING

8.1OVERVIEW

8.2TROUBLESHOOTING USING FAULT CODES

8.3TROUBLESHOOTING WHEN NO ERROR MESSAGE IS SHOWING — pH

8.4TROUBLESHOOTING WHEN NO ERROR MESSAGE IS SHOWING — CONDUCTIVITY

8.5TROUBLESHOOTING WHEN NO ERROR MESSAGE IS SHOWING — GENERAL

8.6SIMULATING INPUTS — pH

8.7SIMULATING INPUTS — CONDUCTIVITY

8.8SIMULATING TEMPERATURE

8.9MEASURING REFERENCE VOLTAGE — pH

8.1 OVERVIEW

The Solu Comp II continuously monitors itself and the sensor for faults. When the analyzer detects a fault, the word fault appears in the display alternately with the measurement. If alarm 3 was configured as a fault alarm, the alarm relay will energize. The outputs do not change during a fault condition. They continue to reflect the measured pH, ORP, conductivity, resistivity, TDS, or temperature. Press to display the fault codes.

8.2 TROUBLESHOOTING USING FAULT CODES

 

Fault Code

Explanation

See Section

 

 

S1

Out of Range

Absolute value of measured voltage exceeds 2500 mV (pH/ORP only)

8.2.1

 

 

S1

Broken Glass

pH sensitive glass membrane is broken

8.2.2

 

 

S2

Open

Sensor 2

(conductivity) is open

8.2.3

 

 

S2

Shorted

Sensor 2

(conductivity) is shorted

8.2.3

 

 

TC1 Open or TC2 Open

RTD for sensor 1 or sensor 2 is open

8.2.4

 

 

TC1 Shorted or TC2 Shorted

RTD for sensor 1 or sensor 2 is shorted

8.2.4

 

 

S1 or S2 Sense Line Open

RTD sense line for sensor 1 or sensor 2 is open

8.2.5

 

 

EEPROM Failure

EEPROM failure

8.2.6

 

 

 

 

 

 

 

 

8.2.1 Absolute Value of Measured Voltage Exceeds 2500 mV

The voltage of a pH cell is usually between 600 mV and -600 mV, and the voltage of an ORP cell is between 2000 and -2000 mV. Readings outside the range -2500 mV to 2500 mV usually indicate a problem with sensor wiring or analyzer electronics.

A.If the sensor is being installed for the first time, check the wiring connections. See Section 3.2. If a junction box is being used, check connections at the junction box, too.

B.If the preamplifier is in a junction box, verify that the wires supplying the power (±5 Vdc) to the preamplifier are connected at the analyzer and junction box.

C.Verify that the sensor is completely submerged in the process liquid.

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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 Hazardous Location DimensionsTerminal Connections Rating 26-14 AWG wire size Ordinary Location -68 onlyRecommended Sensors for Conductivity Performance SpecificationsAnalyzer Conductivity Input Range, µS/cm Cell constant, /cmToroidal Conductivity Codes -21 and/or Measurement Range see table belowWhen used with conductivity -20-32 or Performance Specifications Analyzer ORP InputTemperature Correction none required Recommended Sensors for ORPRepeatability ±1% Recommended SensorsFrequency Range 0.5 4000 Hz Input filter 1- 255 samples Loop Specifications with a Model 499A OZ SensorRecommended Sensor Measurement Range 0-10 ppm mg/LOrdering Information Model 1055 Solu Comp II AnalyzerCombination Guide Part Number Description Weight Unpacking and Inspection Section InstallationInstallation General InformationPanel Mount Installation Panel MountingPipe Mount Installation Pipe MountingSurface Mount Installation Surface MountingPreparing Conduit Openings Section WiringPOWER, ALARM, OUTPUT, and Sensor Connections Model Solu Comp Section Wiring Model Solu Comp Section Wiring 41055105 41055106 41055107 41055108 41055109 41055110 40105536 40105559 Keypad Section Display and OperationDisplay Programming and Calibrating the Solu Comp II Tutorial Using Hold SecuritySection Programming the Analyzer Alarm Section Default SettingsOutput Dampening Or 4 mA Mode Section Sensors Output SectionDefault Settings Definitions Assigning Outputs 1Choose 4-20 mA or 0-20 mA Choose Output ConfigureChoose Output1 or Output2 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 Procedure Changing Screen Contrast Choose Default DisplayProcedure Choosing a Language 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 Overview Section MaintenanceReplacement Parts Model Description See FigureExploded View of Solu Comp II Panel Mount Version Exploded View of Solu Comp II Pipe/Surface Mount Version Simulating Inputs Conductivity Simulating Temperature Section TroubleshootingOverview Troubleshooting Using Fault Codes Absolute Value of Measured Voltage Exceeds 2500 mVRTD Sense Line for Sensor 1 or Sensor 2 is Open PH Sensitive Glass Membrane is BrokenConductivity Sensor Open or Shorted Eeprom FailureProblem See Section Calibration Error During Two-Point CalibrationSensor Does Not Respond to Known pH Changes Calibration Error during StandardizationInvalid Input While Manually Entering Slope Model Solu Comp Section Troubleshooting Calibration Error Using Standard Resistors Conductivity, µS/cm Cell constant, /cm Alarm Relays Do Not WorkMeasurement seems wrong Current Output Too LowPreamplifier is in the Sensor Simulating pH input when the preamplifier is in the sensorGeneral Set the temperature correction to raw Section Simulating Inputs ConductivitySimulating temperature Three-Wire RTD ConfigurationMeasuring Reference Voltage Checking for a Poisoned Reference ElectrodeSection Return of Material Warranty RepairNON-WARRANTY Repair GeneralWarranty Specifications subject to change without notice

PN 51-1055pHC/rev.K specifications

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