Emerson 54e pH/ORP instruction manual Diagnostics Off, Zero offset 60 mV

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MODEL 54e pH/ORP

SECTION 5.0

 

SOFTWARE CONFIGURATION

5.8 ON-LINE DIAGNOSTICS SETUP

Alarms

Diagnostics

Auto Calibration

This section describes the options available for configuration of the on- line sensor diagnostics. The controller checks the integrity of the glass electrode (for pH only) and the reference electrode by continuously meas- uring the impedance of each. The original controller configuration is with diagnostic messages turned off. To enable this feature, see below.

1. Beginning from the main menu, move the cursor down to "Program"

ExitEnter and press Enter (F4). From the program menu, move the cursor down using the arrow key to highlight "Configure" and press Enter (F4).

Use the arrow key again to highlight "Diagnostics" (as shown on the left) and press Enter (F4).

Diagnostics: Off

Glass imp hi: 1000 MΩ

Glass imp lo: 20 MΩ

ExitEdit

Ref imp hi: 140 kΩ

Zero offset: 60 mV

Cal warn: 0%

ExitEdit

Zero offset; 60 mV Cal warn: 0% Imped comp: On

ExitEdit

2.

Menu Item

Option

Related Fault Messages

 

 

 

 

 

Diagnostics

On/Off

 

 

 

 

 

Glass impedance

1-2000 MΩ “Aged glass warning”

 

high setpoint

(0 disables)

 

 

 

 

 

 

Glass impedance

1-900 MΩ

“Cracked glass

 

low setpoint

(0 disables)

failure”

 

 

 

 

 

Reference impedance

1-140 kΩ

"High reference

 

high setpoint

(0 disables)

imped"

 

 

 

 

 

Zero offset

1-999 mV

"Zero offset err"

 

 

(0 disables)

 

 

 

 

 

 

Calibration recommended

1-500%

"Calibration warning"

 

 

(0 disables)

 

 

 

 

 

 

Imped comp

On/Off

 

 

 

 

 

The values now being used by the controller are displayed. To change any of these items, use the arrow key to highlight the desired item and press Edit(F4). Use the arrow keys to make the change and press Save(F4) to enter the change into memory.

"Glass Imp hi" warns of a glass electrode that may have exceeded it's useful life. This warning level should be set higher than the new sensor's impedance. For example, for a new sensor with a glass impedance of 150 MΩ, a setting of 400 MΩ may be appropriate.

"Glass Imp lo" warns of a broken glass electrode. This warning level should be set lower than the new sensor's impedance. A good typical set- ting would be 20 MΩ.

"Ref imp hi" warns of a coated sensor. This warning level should be set higher than the new sensor's reference impedance. Sensors may have reference impedance values that vary considerably, so it is a good idea to check each new sensor before setting this value.

"Zero offset" indicates how far the millivolt response of the sensor is from the ideal case. It is updated after buffer calibration and standardization. If a calibration results in a large enough offset, the fault message will be dis- played.

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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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