Emerson 54e pH/ORP Setpoint +07.00 pH, Time period 30 sec, URV 2.00 pH, LRV 0.00 pH

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MODEL 54e pH/ORP

SECTION 5.0

 

SOFTWARE CONFIGURATION

5.7 CHANGING ALARM PARAMETERS (continued)

Alarm Setup Parameters (for TPC Alarms)

Setpoint: +07.00 pH

Proportional: 100.0%

Integral: 0 sec

ExitEdit

Derivative: 0.0%

Time period: 30 sec

URV: 2.00 pH

ExitEnter

URV: 2.00 pH

LRV: 0.00 pH

Relay default: None

ExitEnter

4b.

Menu Item

Options

 

Set point

-2 to 20 pH, -1400 to +1400 mV(ORP/Redox)

 

 

 

 

Proportional

0-299.9 %

 

Integral

0-2999 sec

 

 

 

 

Derivative

0-299.9 %

 

 

 

 

Time period

10-2999 sec

 

 

 

 

URV

-2 to 20 pH, -1400 to +1400 mV(ORP/Redox)

 

 

 

 

LRV

-2 to 20 pH, -1400 to +1400 mV(ORP/Redox)

 

 

 

 

Relay Default

None/Close/Open

 

 

 

These parameters are available for alarms that have been config- ured as TPC alarms in step 3. Parameters can be adjusted using the same technique as in step 4a, by highlighting the desired item and pressing the Edit 4 key. Once Edit has been pressed, change the item as needed and then press Save 4 to store the value.

"Setpoint" is usually the desired value at which the process is being controlled, typically the alarm will not be on very much when the process is at this value. This setpoint is also accessible in the Program Menu under "Alarm Setpoints" (see Section 5.2)

"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 setpoint 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 set- ting the derivative value to prevent process oscillation.

"Time period" is the cycle time for the TPC control. One cycle con- sists of an energized (relay on) time and an deenergized (relay off) time. The relative amounts of on time and off time depends on the reading and the other settings listed here.

"URV" is the deviation from the setpoint that results in the alarm being on all the time.

"LRV" is the deviation from the setpoint that results in the alarm being off all the time. This should be set to 0.00.

EXAMPLE 1: A setpoint of 6 pH with URV of +2.0 pH and LRV of 0.0 pH, a time period of 30 seconds. When the pH is 7.0, the relay will be on (7-6)/(2-0) = 50% of the time, 15 seconds each time. If the set- point is changed to 6.5 pH, the relay will be on 7-6.5/(2-0) = 25% of the time. The relay would then be on for 7 seconds and off for 23 sec- onds.

"Relay Default" determines how the relay will act if there is a fault or hold condition. Each alarm can be forced on (Close), off (Open) or can remain unchanged (None). The original configuration is "None".

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Contents PH/ORP Hart Analyzer/Controller Model 54e pH/ORPEssential Instructions Electrical Shock HazardPage Section Title Description and SpecificationsModel 54E PH/ORP Microprocessor Analyzer Table No Title Appendix TitleList of Tables Table of Contents List of Figures About This DocumentDescription of Controls Section Description and SpecificationsGeneral Description Specifications Physical Specifications General PowerRelative Humidity 95%, non condensing Alarms Current OutputsAnalyzer Specifications @ 25C Recommended SensorsPart NO. Description Ordering InformationCode Options Section Installation Mechanical InstallationLocating the Controller Unpacking and InspectionPanel Mounting Section Wiring Power Input 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 Section Calibration IntroductionTemperature 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 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/pHTrim Outputs Hold ModeOutput trim 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 ParametersRange 4-20 mA Fault 22.00 mARange 4-20 mAl Fault 22.00mA Output 2 control Output 2 setupHold feature setup Hold Disable featureInterval timer AlarmsAlarm 3 control 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 SetupOn time 120 sec Timer DisableRecovery 600 sec Interval Timer Examples Zero offset 60 mV DiagnosticsDiagnostics Off Diagnostics Auto Calibration SetupAutocal Standard Stabilize pH 0.01 pH Stabilize time 10 secAuto Calibration Setup Standard BuffersContinuous Sensor Diagnostics Section Theory of OperationSee .8 for instructions on chang- ing these setpoints Interval TimerTypical set points 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 ControlControl Loop Adjustment and Tuning Proportional Mode GainProportional Gain Plus Integral Reset Process Reaction Curve Method Process Reaction CurvePID Control Level 1 3 Password Privileges Section Special Procedures and FeaturesPassword Protection Configuring Security SecurityCustom Curve Lock allSensor iso 07.00 pH Solution Temperature CompensationTemp coeff +.000 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 TemperatureController preamp check Figure Preamplifier Troubleshooting ProcedurePreamp in a junction box 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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