Emerson 54e pH/ORP Fixed Hold 21.00mA, Fault 22.00mA, Output 2 control Output 2 setup

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MODEL 54e pH/ORP

SECTION 5.0

 

SOFTWARE CONFIGURATION

5.6 CHANGING OUTPUT PARAMETERS (continued)

Fixed Hold: 21.00mA

Fault: 22.00mA

"Proportional" is short for Proportional Band and indicates the range over which control is being used. It is the opposite of the process gain. Smaller values provide tighter control.

"Integral" is the number of seconds over which deviations from the set- point are integrated to remove continuing offsets. Smaller values provide higher response.

"Derivative" is a form of control that resists all changes in readings. Higher readings increase the derivative function. Use caution in setting the derivative value to prevent process oscillation.

More information regarding PID control can be found in Section 7.0.

ExitEdit Setting these parameters may require some trial and error and should be tested while the process is being supervised to prevent future upsets.

The rest of the PID output setup parameters are identical to those used for normal outputs. See step 4a for details .

Hold Feature Setup

Output 2 control

Output 2 setup

Hold feature setup

ExitEnter

Hold: Disable feature

ExitEdit

5.The Hold feature is used to prevent problems that may occur during calibration if the current outputs are used for control. The feature is turned on (enabled) here and is specifically configured in step 4. The controller starts out with the hold feature turned off (disabled).

To enable the Hold feature, obtain the screen to the left with the hold feature setup highlighted (see steps 1 and 2 for exact instructions). Press Enter 4 and the screen below will appear.

Press the Edit 4 key to enable changes. Options include Disable, Enable, and 20 minute timeout. When 20 minute timeout is selected, the hold mode will automatically disengage after being on for 20 minutes. Selecting Enable or 20 minute timeout does not actually put the controller in hold, but rather allows putting the controller in hold when calibration is conducted.

7.00

pH

When the hold feature has been enabled, this Hold Mode Screen will

 

 

 

 

 

appear when the Calibrate routine is entered. Possible actions are Exit

 

 

1 which cancels the calibration, Enter 4 which enters the calibrate

Hold mode: Off

 

menu without putting the controller in hold, and Edit 4 which allows

 

 

turning Hold Mode On. Note that when hold has been enabled, this

Exit

Enter

screen requires pushing Cont 3 to enter and leave the calibrate menu.

35

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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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