Emerson PN 51-FCL-1056 Troubleshooting When no Error Message is Showing General, Anod, Cath

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MODEL FCL-1056

SECTION 9.0

 

 

TROUBLESHOOTING

9.7 TROUBLESHOOTING WHEN NO ERROR MESSAGE IS SHOWING — GENERAL

 

 

 

 

 

Problem

See Section

 

 

 

 

 

 

New temperature during calibration more than 2-3C° different

9.7.1

 

 

from live reading

 

 

 

 

 

 

 

Current output is too low

9.7.2

 

 

Alarm relays do not operate when setpoint is exceeded

9.7.3

 

 

 

 

 

9.7.1 Difference Between Analyzer and Standard Thermometer is Greater Than 3°C.

1.Is the standard thermometer, RTD, or thermistor accurate? General purpose liquid-in-glass thermometers, particularly ones that have been mistreated, can have surprisingly large errors.

2.Is the temperature element in the pH sensor completely submerged in the test liquid?

3.Is the standard temperature sensor submerged to the correct level?

4.Review Section 6.2.

9.7.2 Current Output Too Low.

Load resistance is too high. Maximum load is 550 Ω.

9.7.3Alarm Relays Do Not Work Verify the relays are properly wired.

9.8 SIMULATING INPUTS — CHLORINE

To check the performance of the analyzer, use a decade box and 1.5V battery to simulate the current from the sen- sor. The battery, which opposes the polarizing voltage, is necessary to ensure that the sensor current has the correct sign.

1.Disconnect the anode and cathode leads from terminals 1 and 2 on TB3 and connect a decade box and 1.5V battery as shown in Figure 9-3. It is not necessary to disconnect the RTD leads.

2.Set the decade box to 2.8 MΩ.

3.Note the sensor current. It should be about 500 nA. The actual value depends on the voltage of the battery. To view the sensor cur- rent, go to the main display and press DIAG. Choose sensor 1. The input current is the second line in the display. Change the decade box resistance and verify that the correct current is shown. Calculate current from the equation:

 

7

ANOD SHLD

 

8

ANOD

R

9

CATH SHLD

current (nA) =

Vbattery — 200 (voltages in mV)

resistance (MΩ)

10 CATH

The voltage of a fresh 1.5 volt battery is about 1.6 volt (1600 mV).

FIGURE 9-3. Simulating Chlorine

70

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Contents FCL with 1056 Analyzer Essential Instructions English Free ChlorinePpm mg/L ORPS1 Manual pH Temp Units S1 Free Cl PH Correction ManualLive/Continous Sensor 2 pH Menu TreeCalibrate Sensor 1 Free chlorine Alarms TemperatureDiagnostic Setup Reset AnalyzerAbout This Document Rev. Level DateTable of Contents FCL-1056Table of Contents CONT’D List of TablesList of Tables CONT’D IiiApplications Section Description and SpecificationsFeatures Specifications Analyzer Specifications GeneralSpecifications Sensor Accessories Ordering InformationComponent Parts PH Correction required selectionThis page left blank intentionally Section Installation Unpacking and InspectionFCL-01 free chlorine without continuous pH correction FCL-02 free chlorine with continuous pH correctionInstallation Installing the SensorsGeneral Information Mounting, Inlet, and Drain ConnectionsModel FCL-01 This page left blank intentionally Section Wiring POWER, ALARM, and Output WiringPower Analog output wiringSensor Wiring Alarm relay connectionsWiring Diagram for Free Chlorine Sensor Model FCL-1056 Section Wiring Section Display and Operation DisplayKeypad Programming the ANALYZER-TUTORIAL CalibrateOutputs RangeOutput Range O1 S1 4mA 0.000 ppm O1 S1 20mA 08.50 ppmO2 S1 4mA 0.0C O2 S1 20mA 100.0C SecurityUsing Hold HoldConfiguring the Main Display Main FormatLanguage English Contrast Format, Language, Warning, and ContrastGeneral Default SettingsSection Programming the Analyzer Alarms Sensor assignmentChoices Default CONFIGURING, RANGING, and Simulating Outputs DefinitionsAssign ConfigureProgramOutput Configure Simulate Output Configure Procedure Ranging OutputsOutput Output Range O1 S1 20mA 10.00 ppm O2 S1 4mA 0.0C O2 S1 20mA 100.0CConfigure Simulate Configuring Alarms and Assigning SetpointsRangeSimulate OutputSection Programming the Analyzer Alarm AlarmsConfigure/Setpoint Alarms Configure/Setpoint Alarm Simulate AlarmSimulate Don’t SimulateProcedure Synchronizing Timers Alarms Configure/Setpoint SimulateSynch Timers Yes Definitions pH/ORP Configuring the MeasurementDefinitions Chlorine Measurement Sensor1SensorConfiguring Temperature Related Settings Definitions pHProgram Outputs Alarms Measurement TemperatureConfiguring Security Settings S1 Temp Comp Auto S2 Temp CompProgram Alarms Measurement Temperature Setting UP DiagnosticsSecurity SecurityProgram Measurement Temperature Security Diagnostic SetupGI Fault High 1500MΩ Procedure Setting Up DiagnosticsResetting the Analyzer Program Temperature Security DiagnosticsReset Analyzer Reset AnalyzerIntroduction Calibrating TemperatureSection Calibration Procedure Calibrate SensorSensor11 OutputS1 Calibration S1 Calibration + 25.0CProcedure-Zeroing the Sensor Calibration Free ChlorineCalibrate SensorSensor11 Output S1 Calibration Choose Free ChlorineTemperature S1 Calibration ZeroZeroCalCal Process Cal Calibrate?Sensor Sensor OutputCalibration pH Calibration Slope and OffsetZeroBufferCalCal AutoStable Time 07.01 pH10.01 pH Manual BufferManual Buffer 1 0 7.00 pH S2 pH Manual Cal Buffer Redox Temperature S2 pH Cal Buffer Cal StandardizeStandardizeSlope 56.19 mV/pH Offset S1 Enter Value 00 pHProcedure-Entering a Known Slope and Offset MA Output Cal Meter 000 mA Trim Complete Calibration Analog OutputsOutput This page left blank intentionally Section Digital Communications Model FCL-1056 Section Section Maintenance AnalyzerCleaning the membrane Replacing the electrolyte solution and membraneChlorine Sensor GeneralPH Sensor Cleaning the SensorOther Maintenance Cleaning the flow controller Constant Head Flow ControllerWeight Weight Section Troubleshooting Using the Diagnostic FeatureFaults OverviewHardware Error Troubleshooting When a Fault Message is ShowingFault message Explanation Section Sensor CPU Error Sensor ADC ErrorSensor Incompatible Sensor RTD OpenSensor RTD Out of Range Glass Z Too HighReference Impedance Too High Broken GlassTroubleshooting When a Warning Message is Showing Troubleshooting When no Error Message is Showing Chlorine Readings drift Sensor can be calibrated, but the current is too lowProcess readings are erratic Sensor does not respond to changes in chlorine level Chlorine readings are too lowTroubleshooting When no Error Message is Showing pH Calibration Error During Two-Point CalibrationCalibration Error during Standardization Sensor Does Not Respond to Known pH ChangesPH Readings Are Moderately Noisy and Tend to Wander Troubleshooting When no Error Message is Showing General Simulating Inputs ChlorineAnod CathSimulating Inputs pH Simulating pH inputSimulating Inputs Temperature Simulating temperaturePage Americas Headquarters ASIA-PACIFICEurope GermanyWarranty Specifications subject to change without notice