Emerson PN 51-FCL-1056 instruction manual Troubleshooting When a Warning Message is Showing

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MODEL FCL-1056

 

SECTION 9.0

 

 

TROUBLESHOOTING

9.4 TROUBLESHOOTING WHEN A WARNING MESSAGE IS SHOWING

 

 

 

 

Warning message

Explanation

Section

 

 

 

Sensor No Solution Gnd

pH sensor may be miswired.

9.4.1

 

 

 

Sensor Need Factory Cal

The sensor board was not calibrated at the factory.

9.4.2

 

 

 

Sensor Out of Range

The pH measurement is invalid.

9.4.3

 

 

 

Sensor Negative Reading

The chlorine reading is less than -0.5 ppm.

9.4.4

 

 

 

Sensor RTD Sense Open

RTD sensor line is broken or not connected

9.4.5

 

 

 

Sensor Temperature High

Temperature is greater than 155ºC (311ºF)

9.4.6

 

 

 

Sensor Temperature Low

Temperature is less than -20ºC (-4ºF)

9.4.6

 

 

 

Broken Glass Disabled

Advisory only (applies to pH sensor only)

9.4.7

 

 

 

9.4.1 Sensor No Solution Gnd

This message implies that the pH sensor is miswired. Check sensor wiring.

9.4.2 Sensor Need Factory Cal

The sensor board was improperly calibrated at the factory. Call the factory for assistance.

9.4.3 Sensor Out of Range

This warning message applies to the pH sensor only. It appears when the raw signal from the pH sensor is greatly outside the range expected for a properly operating sensor.

1.Confirm that the pH sensor is plugged into the VP cable labeled pH sensor.

2.Check wiring in the analyzer.

3.Replace the pH sensor.

9.4.4 Sensor Negative Reading

The message applies to the chlorine sensor only. The analyzer converts the raw sensor current to ppm chlorine by subtracting the zero current from the raw current and multiplying the result by a conversion factor. If the zero current is larger than the raw current, the result will be negative.

1.Check the zero current. It should be less than about 10 nA. If it is greater than 10 nA, repeat the zero step.

2.If the zero current is in the correct range, the negative reading might be the result of the raw current or the sensitivity being too low. A properly operating sensor should generate between 250 and 350 nA for every 1 ppm free chlorine at pH 8. Recalibrate the sensor. If necessary, clean or replace the membrane and check the fill solution.

3.Replace the sensor.

9.4.5 Sensor RTD Sense Open

The analyzer measures temperature using a three-wire RTD. See Figure 9.4. The in and return leads are used to measure the resistance of the RTD. The third lead, called the sense line, is connected to the return lead at the sensor. The sense line allows the analyzer to correct for the resistance of the in and return leads and to compen- sate for changes in lead resistance caused by changes in ambient temperature.

1.Check sensor wiring, particularly the red, white, and white/red RTD leads.

2.Disconnect the sense and return leads and measure the resistance between them. It should be less than 1Ω.

3.Even though the sense line is open, the sensor is still usable. Use a wire jumper to connect the sense and return terminals on the sensor terminal strip. The temperature reading will no longer be corrected for the lead resistance, nor will the analyzer be able to compensate for changes in ambient temperature. The error could be several ºC.

4.Replace the sensor.

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Contents FCL with 1056 Analyzer Essential Instructions Free Chlorine EnglishPpm mg/L ORPLive/Continous S1 Free Cl PH Correction ManualS1 Manual pH Temp Units Calibrate Sensor 1 Free chlorine Menu TreeSensor 2 pH Temperature AlarmsDiagnostic Setup Reset AnalyzerRev. Level Date About This DocumentFCL-1056 Table of ContentsList of Tables Table of Contents CONT’DIii List of Tables CONT’DFeatures Section Description and SpecificationsApplications Specifications Sensor Specifications GeneralSpecifications Analyzer Ordering Information AccessoriesComponent Parts PH Correction required selectionThis page left blank intentionally Unpacking and Inspection Section InstallationFCL-01 free chlorine without continuous pH correction FCL-02 free chlorine with continuous pH correctionInstalling the Sensors InstallationGeneral Information Mounting, Inlet, and Drain ConnectionsModel FCL-01 This page left blank intentionally POWER, ALARM, and Output Wiring Section WiringPower Analog output wiringAlarm relay connections Sensor WiringWiring Diagram for Free Chlorine Sensor Model FCL-1056 Section Wiring Display Section Display and OperationKeypad Calibrate Programming the ANALYZER-TUTORIALOutputs RangeO1 S1 20mA 08.50 ppm Output Range O1 S1 4mA 0.000 ppmO2 S1 4mA 0.0C O2 S1 20mA 100.0C SecurityHold Using HoldMain Format Configuring the Main DisplayLanguage English Contrast Format, Language, Warning, and ContrastSection Programming the Analyzer Default SettingsGeneral Sensor assignment AlarmsChoices Default Definitions CONFIGURING, RANGING, and Simulating OutputsProgramOutput ConfigureAssign Procedure Ranging Outputs Configure Simulate Output ConfigureOutput Output Range O1 S1 20mA 10.00 ppm O2 S1 4mA 0.0C O2 S1 20mA 100.0CConfiguring Alarms and Assigning Setpoints Configure SimulateRangeSimulate OutputSection Programming the Analyzer Configure/Setpoint AlarmsAlarm Alarm Simulate Alarm Alarms Configure/SetpointSimulate Don’t SimulateSynch Timers Yes Alarms Configure/Setpoint SimulateProcedure Synchronizing Timers Definitions Chlorine Configuring the MeasurementDefinitions pH/ORP Sensor1Sensor MeasurementDefinitions pH Configuring Temperature Related SettingsTemperature Program Outputs Alarms MeasurementConfiguring Security Settings S1 Temp Comp Auto S2 Temp CompSetting UP Diagnostics Program Alarms Measurement TemperatureSecurity SecurityDiagnostic Setup Program Measurement Temperature SecurityGI Fault High 1500MΩ Procedure Setting Up DiagnosticsProgram Temperature Security Diagnostics Resetting the AnalyzerReset Analyzer Reset AnalyzerSection Calibration Calibrating TemperatureIntroduction Calibrate SensorSensor11 Output ProcedureS1 Calibration S1 Calibration + 25.0CCalibration Free Chlorine Procedure-Zeroing the SensorChoose Free Chlorine Calibrate SensorSensor11 Output S1 CalibrationCalibrate? Temperature S1 Calibration ZeroZeroCalCal Process CalSensor Sensor OutputCalibration Slope and Offset Calibration pHAuto ZeroBufferCalCal10.01 pH 07.01 pHStable Time Buffer ManualManual Buffer 1 0 7.00 pH S2 pH Manual Cal Buffer StandardizeStandardize Redox Temperature S2 pH Cal Buffer CalSlope 56.19 mV/pH Offset S1 Enter Value 00 pHProcedure-Entering a Known Slope and Offset Output Calibration Analog OutputsMA Output Cal Meter 000 mA Trim Complete This page left blank intentionally Section Digital Communications Model FCL-1056 Section Analyzer Section MaintenanceReplacing the electrolyte solution and membrane Cleaning the membraneChlorine Sensor GeneralOther Maintenance Cleaning the SensorPH Sensor Constant Head Flow Controller Cleaning the flow controllerWeight Weight Using the Diagnostic Feature Section TroubleshootingFaults OverviewFault message Explanation Section Troubleshooting When a Fault Message is ShowingHardware Error Sensor ADC Error Sensor CPU ErrorSensor Incompatible Sensor RTD OpenGlass Z Too High Sensor RTD Out of RangeReference Impedance Too High Broken GlassTroubleshooting When a Warning Message is Showing Troubleshooting When no Error Message is Showing Chlorine Process readings are erratic Sensor can be calibrated, but the current is too lowReadings drift Chlorine readings are too low Sensor does not respond to changes in chlorine levelCalibration Error During Two-Point Calibration Troubleshooting When no Error Message is Showing pHSensor Does Not Respond to Known pH Changes Calibration Error during StandardizationPH Readings Are Moderately Noisy and Tend to Wander Simulating Inputs Chlorine Troubleshooting When no Error Message is Showing GeneralAnod CathSimulating pH input Simulating Inputs pHSimulating temperature Simulating Inputs TemperaturePage ASIA-PACIFIC Americas HeadquartersEurope GermanyWarranty Specifications subject to change without notice
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