Emerson 54e pH/ORP instruction manual Troubleshooting Guide, No Power

Page 72

MODEL 54e pH/ORP

 

SECTION 8.0

 

 

TROUBLESHOOTING

TABLE 8-3. Troubleshooting Guide

 

 

 

 

PROBLEM OR CONDITION

PROBABLE CAUSE AND

FOR MORE HELP,

 

CORRECTIVE ACTION

REFER TO

Controller completely inoperative

No Power -

Wiring, Section 3.0 and Figure 3-1

 

Check power supply at breaker and

 

 

inside controller: 115 V across

 

 

terminals 1 and 2 on TB3.

 

 

Cut-off circuit -

 

 

Check power supply board.

Figure 3-1

Electronics Failure -

Replace the electronics.

Controller operating, but adding chemical above setpoint, or not adding below setpoint,

or not holding setpoint.

Incorrect or Changed Settings -

Software Configuration,

Refer to software configuration

Section 5.0

procedure and verify that control

 

parameters are correct and entered

 

properly. Pay special attention

 

to the TPC settings.

 

Electronics Failure -

Simulated tests

Try power down and power back

Section 5.4

up to reboot the program. Test

 

alarm relays.

 

Replace electronics if necessary.

 

Inability to standardize pH

Incorrect standardization procedure -

Calibration, Section 4.0

"Zero Offset Err"

If you are trying to adjust the pH reading

 

 

by a large amount, the controller may

 

 

reject your standardization and will

 

 

continue to display the previous value.

 

 

Check that your lab instrument, titrations,

 

 

or chemical standard solutions have

 

 

been used properly and are correct.

 

 

Sensor failure -

Section 8.2

 

Simulate sensor in "Preamp

 

 

Troubleshooting".

 

 

Replace sensor if preamp ok.

 

 

Electrode coated -

 

 

Clean electrode as needed.

 

 

(381+ Sensor) Reference chamber

 

 

is contaminated -

 

 

Replace gel-filled solution as instructed

 

 

in 381+ manual

 

 

Defective preamplifier -

Section 8.0

 

Check preamplifier as instructed in

 

 

Preamp Troubleshooting procedure

 

 

and replace if defective.

 

 

(381+ Sensor) Bad Reference -

 

 

If trouble still persists, microjunction on

 

 

reference electrode is defective.

 

 

Replace reference electrode.

 

66

Table 8-3 is continued on the following page

 

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Contents PH/ORP Hart Analyzer/Controller Model 54e pH/ORPEssential Instructions Electrical Shock HazardPage Description and Specifications Model 54E PH/ORP Microprocessor AnalyzerSection Title Appendix Title List of TablesTable No Title Table of Contents List of Figures About This DocumentSection Description and Specifications General DescriptionDescription of Controls Specifications Physical Specifications General PowerRelative Humidity 95%, non condensing Alarms Current OutputsAnalyzer Specifications @ 25C Recommended SensorsOrdering Information Code OptionsPart NO. Description Section Installation Mechanical InstallationLocating the Controller Unpacking and InspectionPanel Mounting Section Wiring Power Input WiringAnalog Output Wiring Alarm Relay Output Wiring454EPH02 PH Sensor Wiring PH Sensor CompatibilityTions will Result in Controller MALFUNC- Tion 454EPH01 Cable Dressing Final Electrical Check Wiring to Model Section Calibration IntroductionHold Mode Off Adjust temp 25.1 CTemperature Calibration Autocal buffer Buffer 1 -- WaitAutomatic TWO-POINT Calibration Auto buffer cal done Use the arrow keys to select the correct bufferCalibration Notes Calibrate point Pt 04.00pH 25CPt calibration done Manual TWO-POINT CalibrationStandardize 7.01 pH SINGLE-POINT pH CalibrationTemperature Compensation Options Temp comp AutoOutput trim 59.16 mV/pHHold Mode Output trimTrim Outputs Section Software Configuration PH Settings ListRanges Factory Settings User Settings Diagnostics Section Outline of Menu Levels Alarm High 14.00pH Changing Alarm SetpointsSimulate tests Setpoint 07.00 pHSetpoint 7.00 pH 4mA 0.00 pH 20mA 2.00 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 pHAlarm setpoints Output setpoints Test output Test alarmTesting Outputs and Alarms Simulated testsTest alarm 1 Open Test alarm 1 OpenDisplay right AL2 Measure pHDisplay contrast Timeout On Security CautionControl Mode DisplayChanging Output Parameters Output Control ParametersFault 22.00 mA Range 4-20 mAlRange 4-20 mA Fault 22.00mA Output 2 control Output 2 setupHold feature setup Hold Disable featureAlarms Alarm 3 controlInterval timer Alarm Low Setpoint 0.01 pH Delay 0 secHysteresis 0.01 pH Delay 0 sec Relay Default NoneRelay default None Setpoint +07.00 pHTime period 30 sec URV 2.00 pHAlarm Fault Feed limit DisableTimeout 3600 sec Alarm 4 SetupTimer Disable Recovery 600 secOn time 120 sec Interval Timer Examples Diagnostics Diagnostics OffZero offset 60 mV Diagnostics Auto Calibration SetupAutocal Standard Stabilize pH 0.01 pH Stabilize time 10 secAuto Calibration Setup Standard BuffersContinuous Sensor Diagnostics Section Theory of OperationInterval Timer Typical set pointsSee .8 for instructions on chang- ing these setpoints Alarm Relays Time Proportional Control TPC Mode CodeNormal Mode Analog OutputsController Mode Priority Controller Mode Priority ChartCondition Definitions Action DefinitionsPID Control Mode Combinations PID Control CodePID Control Measurement and Set Point Feedback ControlProportional Mode Gain Proportional Gain Plus Integral ResetControl Loop Adjustment and Tuning Process Reaction Curve Method Process Reaction CurvePID Control Section Special Procedures and Features Password ProtectionLevel 1 3 Password Privileges Configuring Security SecurityCustom Curve Lock allSolution Temperature Compensation Temp coeff +.000Sensor iso 07.00 pH Operate iso +07.00 pH Section Troubleshooting Troubleshooting is easy as 1, 2, 3…Diagnostic Messages Diagnostic Messages Description of problemQuick Troubleshooting Guide Symptom ActionDiagnostic Variables Theoretical pH vs. Millivolt Values at 25C 77F Troubleshooting Guidelines Temperature Compensation CircuitTroubleshooting Procedure Ohms Ambient TemperaturePreamplifier Troubleshooting Procedure Preamp in a junction box FigureController preamp check Figure Junction Box Preamplifier Check Troubleshooting Guide No PowerCoated glass electrode Clean with soft cloth and clean water Password protected Replacement Parts Part Number DescriptionWarranty Repair NON-WARRANTY RepairSection Return of Material GeneralAppendix a ORP Configuration Quick Startup ORPTable A-1. ORP Settings List Item Choices ORP Settings User SettingsChoices ORP Settings User Settings Diagnostics SectionOutput setpoints Simulated testsStandardize 400 mV ORP CalibrationReturn of Materials Request Sensor or Circuit Board onlyWarranty Return of MaterialSpecifications subject to change without notice
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