Emerson 54e pH/ORP Section Wiring, General, Power Input Wiring, Analog Output Wiring

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MODEL 54e pH/ORP

SECTION 3.0

 

WIRING

SECTION 3.0

WIRING

3.1 GENERAL

WARNING

All electrical installation must conform to the National Electrical Code, all state and local codes, and all plant codes and standards for electrical equipment. All electrical installations must be supervised by a qualified and respon- sible plant electrician.

NOTE

Wire only the analog and alarm outputs required for your application. Be sure to read the warning at the beginning of Section 2.0.

The Model 54e pH/ORP has five access holes in the bot- tom of the instrument housing which accept ½-in. strain relief connectors or conduit fittings. Be sure to seal any unused access holes. As you face the front of the unit, the rear openings are for input power, and alarm relay signals. The opening on the front left is for sensor wiring only (DC). The front right is for analog output wiring.

NOTE

For best EMI/RFI protection, the output cable should be shielded and enclosed in an earth grounded, rigid, metal conduit. Connect the output cable's outer shield to the earth ground connection on TB2 (Figure 3-1)

3.2 POWER INPUT WIRING

Figure 3-1 depicts the wiring detail for the Model 54e pH/ORP. Code -01: connect AC power to TB3, termi- nals 1 and 2 for 115 VAC (terminals 2 and 3 for 230 VAC). Code -02: connect DC power to TB3 terminals 1 and 2. Connect earth ground to the nearby ground lug. A good earth ground is essential for proper operation of the controller. Be sure to provide a means of discon- necting the main power to the controller.

CAUTION

Do not apply power to the controller until all electrical connections are made.

WARNING

Electrical connections to this equipment must be made in accordance with the cur- rent National and Local Electrical Codes in effect for the installation location.

3.3 ANALOG OUTPUT WIRING

The analog output wiring consists of two 4-20 mA sig- nals: output one from terminals 4 and 5, output 2 from 1 and 2 on TB2, as shown in Figure 3-1. These signals can be used for chart recorder, computer monitoring, or PID control output. The analog outputs can be pro- grammed for 4-20 mA or for 0-20 mA, direct or reverse acting. Current output 1 includes superimposed HART (code -09 only).

3.4 ALARM RELAY OUTPUT WIRING

The controller has 3 "dry" alarm relay contacts which are normally open. Alarm 1 is across terminals 4 and 5 on TB3. This alarm is typically used to control the pump in a chemical feed system. Alarm 2 across terminals 6 and 7 on TB3 is usually used to operate a light or horn as a means of alerting the chemical process operator when pH/ORP is outside the control range. Alarm 3 is across terminals 8 and 9 on TB3. All 3 of these alarms may be activated on pH/ORP or temperature. They can also be used to control other pumps or valves provided they are programmed to do so. Refer to Section 5.0 to set up these functions.

All three alarm contacts on the Model 54e pH/ORP are rated for a maximum of 3 A (1.5A, 230 VAC, inductive load). If your associated pump or valve exceeds this, use a separate contact or relay rated for the external device.

To use a contact output to control a pump, valve, or light, the contact must be wired into a circuit together with a source of power for the device to be controlled. The power can be jumpered from the main power into the controller and the circuit can be wired as shown on the wiring diagrams, Figure 3-1.

PREAMPLIFIER SELECTION

The pH sensor signal requires a preamplifier at some point in the measuring circuit. The preamp can be in- side the sensor, in the junction box, or in the controller. To allow for these options, the Model 54e pH/ORP has a jumper selectable preamp mounted on the CPU cir- cuit board (Figure 3-3). The jumper is placed in the "analyzer" position when there is no preamp in the sen- sor (or junction box). Generally, this jumper is in the "sensor" position.

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Contents Model 54e pH/ORP PH/ORP Hart Analyzer/ControllerElectrical Shock Hazard Essential InstructionsPage Model 54E PH/ORP Microprocessor Analyzer Description and SpecificationsSection Title List of Tables Appendix TitleTable No Title About This Document Table of Contents List of FiguresGeneral Description Section Description and SpecificationsDescription of Controls Power Specifications Physical Specifications GeneralRelative Humidity 95%, non condensing Alarms Current OutputsRecommended Sensors Analyzer Specifications @ 25CCode Options Ordering InformationPart NO. Description Mechanical Installation Section InstallationLocating the Controller Unpacking and InspectionPanel Mounting Power Input Wiring Section WiringAnalog Output Wiring Alarm Relay Output Wiring454EPH02 PH Sensor Compatibility PH Sensor WiringTions will Result in Controller MALFUNC- Tion 454EPH01 Cable Dressing Final Electrical Check Wiring to Model Introduction Section CalibrationAdjust temp 25.1 C Hold Mode OffTemperature Calibration Buffer 1 -- Wait Autocal bufferAutomatic TWO-POINT Calibration Use the arrow keys to select the correct buffer Auto buffer cal doneCalibration Notes 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/pHOutput trim Hold ModeTrim Outputs 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 mAl Fault 22.00 mARange 4-20 mA Output 2 control Output 2 setup Fault 22.00mAHold feature setup Hold Disable featureAlarm 3 control AlarmsInterval timer 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 SetupRecovery 600 sec Timer DisableOn time 120 sec Interval Timer Examples Diagnostics Off DiagnosticsZero offset 60 mV Auto Calibration Setup DiagnosticsAutocal Standard Stabilize pH 0.01 pH Stabilize time 10 secStandard Buffers Auto Calibration SetupSection Theory of Operation Continuous Sensor DiagnosticsTypical set points Interval TimerSee .8 for instructions on chang- ing these setpoints 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 ControlProportional Gain Plus Integral Reset Proportional Mode GainControl Loop Adjustment and Tuning Process Reaction Curve Process Reaction Curve MethodPID Control Password Protection Section Special Procedures and FeaturesLevel 1 3 Password Privileges Security Configuring SecurityCustom Curve Lock allTemp coeff +.000 Solution Temperature CompensationSensor iso 07.00 pH 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 TemperaturePreamp in a junction box Figure Preamplifier Troubleshooting ProcedureController preamp check 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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