Emerson 54e pH/ORP instruction manual Diagnostic Messages Description of problem

Page 65

MODEL 54e pH/ORP

 

SECTION 8.0

 

 

TROUBLESHOOTING

TABLE 8-1. Diagnostic Messages

 

 

Diagnostic Messages

Description of problem

 

 

"Cracked glass failure"

Broken or cracked glass electrode

 

 

"Zero offset error" *

Reference electrode poisoned.

 

 

 

"High reference imped"

1.

Coated reference electrode (Sensor cleaning recommended)

 

2.

Sensor out of process.

 

 

 

"Temp error high"

1.

Open or shorted RTD

"Temp error low"

2. Temperature out of range

 

 

 

"Calibration warning"

1.

Calibration suggested due to change in glass

 

2.

Sensor out of process

 

 

 

"Old glass warning"

1.

Glass electrode worn out

 

2.

Sensor out of process

 

 

 

"Lo slope error"*

1.

Worn out electrode

"Hi slope error"*

2.

Improper buffer calibration (check buffer accuracy, wait for stabilization in buffers)

 

3.

Plugged liquid junction/coated glass

 

 

 

"Sensor line open"

1.

Open wire between sensor and controller.

 

2.

Distance between sensor and controller is too long.

 

 

 

"Failure - EEPROM"

1.

Defective CPU board. Notify Rosemount

"Failure - CPU"

 

if cycling power does not clear the fault

"Failure - Factory"

 

 

 

 

"Failure - ROM"

Bad "ROM" chip on CPU board

 

 

"Field cal needed"

Output 1 and 2 need adjustment

 

 

"Hold mode activated"

All relays open and outputs set to default values

(operator activated)

 

 

 

 

"High input voltage"

Open connection from preamplifier to controller.

 

 

"Low input voltage"

Open connection from glass electrode to preamplifier.

 

 

 

"High reference voltage"

1.

Sensor not in process

 

2.

Coated Sensor

 

3.

Open wire between preamplifier and controller.

 

 

"Simulating Output 1 or 2"

The indicated output or alarm is being tested. see Section 5.4

"Simulating Alarm 1, 2, 3, or 4"

 

 

 

 

"Feed limit alarm 1, 2, or 3"

Indicated alarm has been on for longer than it's limit and has been turned off.

 

 

 

*Off line error messages will not initiate fault condition, and will display only once. The message will clear from the screen when a key is pressed.

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Contents Model 54e pH/ORP PH/ORP Hart Analyzer/ControllerElectrical Shock Hazard Essential InstructionsPage Section Title Description and SpecificationsModel 54E PH/ORP Microprocessor Analyzer Table No Title Appendix TitleList of Tables About This Document Table of Contents List of FiguresDescription of Controls Section Description and SpecificationsGeneral Description Power Specifications Physical Specifications GeneralRelative Humidity 95%, non condensing Alarms Current OutputsRecommended Sensors Analyzer Specifications @ 25CPart NO. Description Ordering InformationCode Options Mechanical Installation Section InstallationLocating the Controller Unpacking and InspectionPanel Mounting Power Input Wiring Section WiringAnalog Output Wiring Alarm Relay Output Wiring454EPH02 Tions will Result in Controller MALFUNC- Tion PH Sensor WiringPH Sensor Compatibility 454EPH01 Cable Dressing Final Electrical Check Wiring to Model Introduction Section CalibrationTemperature Calibration Hold Mode OffAdjust temp 25.1 C Automatic TWO-POINT Calibration Autocal bufferBuffer 1 -- Wait Calibration Notes Auto buffer cal doneUse the arrow keys to select the correct buffer Pt 04.00pH 25C Calibrate pointPt calibration done Manual TWO-POINT CalibrationSINGLE-POINT pH Calibration Standardize 7.01 pHTemp comp Auto Temperature Compensation OptionsOutput trim 59.16 mV/pHTrim Outputs Hold ModeOutput trim PH Settings List Section Software ConfigurationRanges Factory Settings User Settings Diagnostics Section Outline of Menu Levels Changing Alarm Setpoints Alarm High 14.00pHSimulate tests Setpoint 07.00 pH4mA 0.00 pH 20mA 2.00 pH Setpoint 7.00 pHSetpoint + 06.90 pH Changing Output Setpoints PID onlyOutput OutputMA 0.00 pH 20 mA 14.00 pH Output 1 12.00 mA MA +00.00 pHTest output Test alarm Alarm setpoints Output setpointsTesting Outputs and Alarms Simulated testsTest alarm 1 Open Test alarm 1 OpenMeasure pH Display right AL2Security Caution Display contrast Timeout OnDisplay Control ModeChanging Output Parameters Output Control ParametersRange 4-20 mA Fault 22.00 mARange 4-20 mAl Output 2 control Output 2 setup Fault 22.00mAHold feature setup Hold Disable featureInterval timer AlarmsAlarm 3 control Setpoint 0.01 pH Delay 0 sec Alarm LowHysteresis 0.01 pH Delay 0 sec Relay Default NoneSetpoint +07.00 pH Relay default NoneTime period 30 sec URV 2.00 pHFeed limit Disable Alarm FaultTimeout 3600 sec Alarm 4 SetupOn time 120 sec Timer DisableRecovery 600 sec Interval Timer Examples Zero offset 60 mV DiagnosticsDiagnostics Off Auto Calibration Setup DiagnosticsAutocal Standard Stabilize pH 0.01 pH Stabilize time 10 secStandard Buffers Auto Calibration SetupSection Theory of Operation Continuous Sensor DiagnosticsSee .8 for instructions on chang- ing these setpoints Interval TimerTypical set points Time Proportional Control TPC Mode Code Alarm RelaysAnalog Outputs Normal ModeController Mode Priority Chart Controller Mode PriorityCondition Definitions Action DefinitionsPID Control Code PID Control Mode CombinationsPID Control Measurement and Set Point Feedback ControlControl Loop Adjustment and Tuning Proportional Mode GainProportional Gain Plus Integral Reset Process Reaction Curve Process Reaction Curve MethodPID Control Level 1 3 Password Privileges Section Special Procedures and FeaturesPassword Protection Security Configuring SecurityCustom Curve Lock allSensor iso 07.00 pH Solution Temperature CompensationTemp coeff +.000 Operate iso +07.00 pH Troubleshooting is easy as 1, 2, 3… Section TroubleshootingDiagnostic Messages Description of problem Diagnostic MessagesSymptom Action Quick Troubleshooting GuideDiagnostic Variables Theoretical pH vs. Millivolt Values at 25C 77F Temperature Compensation Circuit Troubleshooting GuidelinesTroubleshooting Procedure Ohms Ambient TemperatureController preamp check Figure Preamplifier Troubleshooting ProcedurePreamp in a junction box Figure Junction Box Preamplifier Check No Power Troubleshooting GuideCoated glass electrode Clean with soft cloth and clean water Password protected Part Number Description Replacement PartsNON-WARRANTY Repair Warranty RepairSection Return of Material GeneralQuick Startup ORP Appendix a ORP ConfigurationItem Choices ORP Settings User Settings Table A-1. ORP Settings ListDiagnostics Section Choices ORP Settings User SettingsSimulated tests Output setpointsORP Calibration Standardize 400 mVSensor or Circuit Board only Return of Materials RequestReturn of Material WarrantySpecifications subject to change without notice
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