Emerson Process Management 53eA Section Specifications, Features and Applications

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MODEL 54eA

SECTION 1.0

 

SPECIFICATIONS

SECTION 1.0

SPECIFICATIONS

1.1 FEATURES AND APPLICATIONS

The Model 54eA Analyzer/Controller with the appro- priate sensor monitors and controls dissolved oxy- gen (ppm and ppb level), free chlorine, total chlorine, and ozone in a variety of process liquids. The analyzer is compatible with Rosemount Analytical series 499A amperometric sensors for oxygen, chlorine, and ozone; and with Hx438 and Gx448 steam sterilizable oxygen sensors.

The amperometric sensors used with the Modeal 54eA produce a current directly proportional to the concentration of the substance being determined.

Sensor currents are in the microampere to nanoam- pere range.

For oxygen measurements, an on-board pressure sensor allows truly automatic air calibration. Simply expose the sensor to water-saturated air. Wait until readings are stable and press a button. The analyz- er measures temperature and barometric pressure and automatically completes the calibration.

For free chlorine measurements, both automatic and manual pH correction are available. pH correction is necessary because amperometric chlorine sensors respond only to hypochlorous acid. To measure free chlorine (hypochlorous acid plus hypochlorite ion) most competing analyzers require an acidified sam- ple. Acid lowers the pH and converts hypochlorite ion to hypochlorous acid. The 54eA analyzer elimi- nates the need for messy and expensive reagents by using the sample pH to correct the chlorine sen- sor signal. If the pH is relatively constant, a fixed pH correction can be used. If the pH is greater than 7 and fluctuates more than about 0.2 units, continuous measurement of pH and automatic pH correction is necessary. Corrections are valid to pH 9.5.

The 54eA analyzer fully compensates oxygen, ozone, free chlorine, and total chlorine readings for changes in membrane permeability caused by tem- perature changes.

For pH measurements — pH is available with free chlorine only — the 54eA features automatic buffer recognition with stabilization check. Buffer pH and temperature data for commonly used buffers are stored in the analyzer. Glass impedance diagnostics warn the user of an aging or failed pH sensor.

The analyzer has a rugged, weatherproof, corrosion- resistant enclosure (NEMA 4X and IP65) of epoxy- painted aluminum. It is suitable for panel, pipe, or wall mounting. A hinged front cover provides convenient access to wiring. Programming and calibration are through the front membrane keypad, which has tac- tile feedback. The large back-lit dot-matrix display shows the main measurement (oxygen, chlorine, or ozone) in large numerals. The temperature and out- put current are shown in smaller numerals on the second line. Two user-selectable variables can be displayed on the third line. The pH measurement, if used, appears on the third line.

Two independent, galvanically isolated outputs provide 4-20 mA or 0-20 mA signals for oxygen, chlorine, ozone, pH, or temperature. Output 1 includes a HART digital signal superimposed on the analog signal. The controller option allows PID control on any measure- ment.

The Model 54eA has three programmable alarm relays. Alarms can be assigned to the amperometric measurement, pH, or temperature. Alarms have pro- grammable high or low activation, independent set- points, adjustable deadband, and time delay. Any relay can be configured as a timer to control a spray cleaner for the dissolved oxygen sensor. An over- feed timer feature is also available. The controller option allows each alarm to be configured for time proportional control (TPC). A fourth relay is a dedi- cated fault alarm.

The Model 54eA analyzer is a member of the Rosemount SMART FAMILY® of instruments. The analyzer communicates with the Model 275 HART® communicator or any other host, including AMS, that supports the 275 HART communication protocol.

®SMART FAMILY is a registered trademark of Rosemount Inc.

®HART is a registered trademark of the HART Communication Foundation.

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Contents Amperometric Hart Analyzer/Controller Model 54eAEssential Instructions Page Model 54eA ANALYZER/CONTROLLER 13.0 10.011.0 12.0Section Title List of FiguresIii Features and Applications Section SpecificationsWeight/Shipping Weight 5 lb/6 lb 2 kg/2.5 kg Specifications GeneralPower Output Accuracy ± 0.05 mA AlarmsSpecifications Ozone Specifications OxygenSpecifications Free Chlorine Specifications Total ChlorineOrdering Information 115/230 VAC, 50/60 Hz Power24 VDC Installation Section InstallationUnpacking and Inspection Pipe mounting Pipe and Wall Mounting DimensionsPanel mounting Panel Mounting DimensionsPOWER, ALARM, and Output Wiring Section WiringGeneral 454EPH02 Wiring Model 499A oxygen, chlorine, and ozone sensors Sensor WiringGeneral 4054eA01 4054eA03 4054eA02 4054eA04 4054eA07 Display Alarm StatusSection Display and Operation General DescriptionProgram Settings List Section Software ConfigurationChoices Factory Settings Configure Choices Factory Settings Temperature compensation Section Menu Tree for the 54eA Controller Main Menu Main Alarm 2 setpoint Alarm setpointsRanging the Outputs MA 0.00 ppm 20 mA 20.00 ppm Output 1 12.00 mASetpoint 1.000 ppm 4mA 0.000 ppm 20mA 10.00 ppm Alarm setpointsOutput setpoints Simulated testSimulated tests Test alarm 1 OpenTest output Display ConfigureTemp units C Output 1 mA Output 2 mA Display contrast Timeout OnLanguage English Display left Display right Out Output 1 control OutputsOutput Measurement Range 4-20 mA Dampen 0 sec Hold Last Value Ctrl mode NormalOutput 1 Setup Output 1 ControlUsing hold Hold setupAlarm Control Settings Changing Alarm ParametersAlways configure the control parameters Before making Changes in the alarm setupAlarm Low Setpoint 0.000 ppm Alarm 1 controlAlarm 1 setup Alarm 2 controlHigh Alarm Low AlarmFeed limit timer setup Alarm FaultFeed limit Disable Timeout 3600 secInterval timer setup Alarm 4 setup Feed limit timerInterval timer Timer Disable Timer Time activated Interval 24.0 hrPH comp Manual PH value 7.00 pH PH sensor EnablePH sensor Disable Using the 499ACL-01 sensorGlass imp lo 20 MΩ Diagnostics OffAutocal Standard Operate iso 7.00 pH Sensor iso 7.00 pH Temp coeffTemp comp Manual Temp units C Temperature Compensation and Temperature UnitsTemp comp Auto Temp units CNoise Reduction 60 HzMain sensor cal Bar units mm Hg Bar meas AutoBarometric Pressure Lock all Lock program Lock configNoise rejection Main sensor cal SecurityCondition Definitions Controller Mode PriorityAction Definitions Introduction Section Calibration TemperatureTemperature Calibration Adjust temp + 025.1 CDissolved Oxygen Concentration Section Calibration Dissolved OxygenZeroing the Sensor Sensor must be in zero solutionCalibrating the Sensor in AIR Stabilizing . . . WaitSection Calibrating the Sensor Against a Standard Instrument Calibrate 8.32 ppmCalibrating Barometric Pressure Zero main sensor Adjust temperatureCalibrate main sensor StandardizeSensor Current as a Function of Free Chlorine Concentration Section Calibration Free Chlorine 499ACL-01Calibrate main sensor Full Scale Calibration Calibrate 1.100 ppmDual Slope Calibration Dual range calOutput trim Calibrate low pointCalibrate high point Low point 2.000 ppmIntroduction Section Calibration Free Chlorine 498CL-01Ppm 100ppm 000 ppm Section Calibration Free Chlorine 498CL-01 Section Calibration Total Chlorine This page intentionally left blank Sensor Current as a Function of Monochloramine Concentration Section Calibration MonochloraminePpm 100ppm Sensor Current as a Function of Ozone Concentration Section Calibration OzonePpm 100ppm PH at 25C Standards Nominal pH SectionAutomatic TWO-POINT Calibration Autocal buffer10.02 pH Pt 04.00pH 25C Calibrate pointManual TWO-POINT Calibration Pt 4.00pH 25.0C 10.01 pHPt calibration Standardize pH pH slope Standardization ONE-POINT CalibrationPH slope 60.00 mV/pH Trimming the Outputs Section Calibration Current OutputsPID Control Code Section PID and TPC ControlControl Loop Adjustment and Tuning Proportional Gain Plus Integral ResetProcess Reaction Curve Method Process Reaction Curve Section Time Proportional Control TPC Mode Code Overview Section TroubleshootingTroubleshooting When a Fault Message is Showing Fault message Explanation See SectionPH low or high input voltage Temperature error low or highHigh input current Check sensor zeroFailure factory and Failure eeprom Troubleshooting When no Fault Message is Showing OxygenProblem See Section Sense line openZero current is too high Possible error warning during in-process calibrationZero reading Is unstable Sensor does not respond to changes in oxygen level Barometric pressure reading is too high or too lowProcess readings are erratic Readings driftZero current is unstable ProblemSensor can be calibrated, but the current is too low Chlorine readings are too low Sensor does not respond to changes in chlorine levelProblem See Section Sensor does not respond to changes in monochloramine level Readings are too low Troubleshooting When no Fault Message is Showing Ozone Ozone readings are too low Sensor does not respond to changes in ozone levelTroubleshooting When no Fault Message is Showing pH Sensor does not respond to known pH changes Controller will not accept manual slope100 101 Process pH readings are noisySensor Polarizing Voltage Resistance Expected current Troubleshooting not Related to Measurement ProblemsProblem Action Simulating Inputs Dissolved OxygenSimulate Chlorine and Ozone 103 Simulating Inputs Other Amperometric MeasurementsVoltage mV PH at 25C Simulating pH input when the preamplifier is in the sensor104 Simulating temperature Simulating Temperature105 106 Measuring Reference VoltageReplacement Parts Part Number Description Section MaintenanceGeneral Section Return of MaterialWarranty Specifications subject to change without notice
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