Emerson Process Management 53eA instruction manual Calibrate 8.32 ppm

Page 59

MODEL 54eA	SECTION 7.0
	CALIBRATION - DISSOLVED OXYGEN

7.4 CALIBRATING THE SENSOR AGAINST A STANDARD INSTRUMENT

The analyzer and sensor can be calibrated against a standard instrument. For oxygen sensors installed in aera- tion basins in waste treatment plants, calibration against a second instrument is often preferred. For an accurate calibration be sure that…

1.The standard instrument has been zeroed and calibrated against water-saturated air following the manufac- turer's instructions.

2.The standard sensor is immersed in the liquid as close to the process sensor as possible.

3.Adequate time is allowed for the standard sensor to stabilize before calibrating the process instrument.

Calibrate main sensor Zero main sensor Adjust temperature

4.From the main display, press any key to obtain the main menu. With the cursor on “Calibrate,” press Enter (F4).

NOTE

If Hold was enabled in Section 5.6, the hold screen will appear. To activate hold, refer to Section 5.6, step 11.

ExitEnter

Calibrate in air Calibrate in process Barometric pressure

ExitEnter

8.32ppm

Stabilizing . . . Wait

Abort Cont

8.32ppm

Calibrate : 8.32 ppm

ExitEdit

Press Enter (F4).

5.The screen at left appears. Press the ê key once to move the cursor to “Calibrate in process.” Then, press Enter (F4).

6.Press Cont (F3). “Wait” flashes until the sensor is stabilized.

If the controller appears locked, the reading is not stable enough. Increase the amount the concentration is permitted to vary or decrease the stabilization time. See Section 5.11. Repeat the cali- bration. To proceed with the calibration as is, press Cont (F3).

7.Once the reading is stable, the screen at left appears. Press Edit (F4). Use the arrow keys to change the concentration in the second line of the display to the desired value. Press Save (F4) to store the value.

8.Press Exit (F1) four times to return to the main display.

NOTE

If Hold was activated during calibration, “Hold Mode Activated” will continue to flash in the main display. Return the sensor to normal and deactivate Hold. Refer to Section 5.6, step 11.

53

Image 59

Contents Amperometric Hart Analyzer/Controller Model 54eAEssential Instructions Page Model 54eA ANALYZER/CONTROLLER 13.0 10.011.0 12.0Iii List of FiguresSection Title 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 Chlorine24 VDC 115/230 VAC, 50/60 Hz PowerOrdering Information Unpacking and Inspection Section InstallationInstallation Pipe mounting Pipe and Wall Mounting DimensionsPanel mounting Panel Mounting DimensionsGeneral Section WiringPOWER, ALARM, and Output Wiring 454EPH02 General Sensor WiringWiring Model 499A oxygen, chlorine, and ozone sensors 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 testTest output Test alarm 1 OpenSimulated tests Display ConfigureLanguage English Display left Display right Out Display contrast Timeout OnTemp units C Output 1 mA Output 2 mA Output Measurement OutputsOutput 1 control 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 sensorAutocal Standard Diagnostics OffGlass imp lo 20 MΩ 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 Barometric Pressure Bar meas AutoBar units mm Hg Lock all Lock program Lock configNoise rejection Main sensor cal SecurityAction Definitions Controller Mode PriorityCondition Definitions Introduction Section Calibration TemperatureTemperature Calibration Adjust temp + 025.1 CDissolved Oxygen Concentration Section Calibration Dissolved Oxygen Zeroing 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 Manual TWO-POINT Calibration Calibrate pointPt 04.00pH 25C 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 ControlProcess Reaction Curve Method Proportional Gain Plus Integral ResetControl Loop Adjustment and Tuning 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 reading Is unstable Possible error warning during in-process calibrationZero current is too high 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 100 Controller will not accept manual slopeSensor does not respond to known pH changes 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 Measurements104 Simulating pH input when the preamplifier is in the sensorVoltage mV PH at 25C 105 Simulating TemperatureSimulating temperature 106 Measuring Reference VoltageReplacement Parts Part Number Description Section MaintenanceGeneral Section Return of MaterialWarranty Specifications subject to change without notice