Simulate Chlorine and Ozone 103 | Emerson Process Management 53eA

MODEL 54eA	SECTION 16.0
	TROUBLESHOOTING

16.12 SIMULATING INPUTS - OTHER AMPEROMETRIC MEASUREMENTS

To check the performance of the controller, use a decade box and a battery to simulate the current from the sen- sor. The battery, which opposes the polarizing voltage, is necessary to ensure that the sensor current has the cor- rect sign.

NOTE

It is not possible to simulate an input from a 498CL-01 sensor.

A.Disconnect the anode and cathode leads from terminals 1 and 2 on TB3 and connect a decade box and bat- tery as shown in Figure 16-2. It is not necessary to disconnect the RTD leads.

B.Set the decade box to the resistance shown in the table.

	Sensor	Polarizing Voltage	Resistance	Expected current
	499ACL-01 (free chlorine)	200 mV	28 MΩ	500 nA
	499ACL-02 (total chlorine)	250 mV	675 kΩ	2000 nA

	499ACL-03 (monochloramine)	400 mV	3 MΩ	400 nA
	499AOZ	250 mV	2.7 MΩ	500 nA

C.Note the sensor current. It should be close to the value in the table. The actual value depends of the voltage of the battery. To view the sensor current from the main display, press any key to enter the main menu. Move the cursor to "Diagnostics" and press Enter (F4). The

sensor current is the second line in the display. Note the units: μA is microamps, nA is nanoamps.

D.Change the decade box resistance and verify that the correct current is shown. Calculate current from the equation:

Vbattery - Vpolarizing (mV)

current (μA) =

resistance (kΩ)

The voltage of a fresh 1.5 volt battery is about 1.6 volt (1600 mV).

FIGURE 16-2. Simulate Chlorine and Ozone

103

Image 109

Emerson Process Management 53eA Simulating Inputs Other Amperometric Measurements, Simulate Chlorine and Ozone 103

Contents

Amperometric Hart Analyzer/Controller Model 54eA Essential Instructions Page Model 54eA ANALYZER/CONTROLLER 11.0 10.012.0 13.0 Section Title List of FiguresIii Features and Applications Section Specifications Power Specifications GeneralOutput Accuracy ± 0.05 mA Alarms Weight/Shipping Weight 5 lb/6 lb 2 kg/2.5 kg Specifications Free Chlorine Specifications OxygenSpecifications Total Chlorine Specifications Ozone Ordering Information 115/230 VAC, 50/60 Hz Power24 VDC Installation Section InstallationUnpacking and Inspection Pipe mounting Pipe and Wall Mounting Dimensions Panel mounting Panel Mounting Dimensions POWER, ALARM, and Output Wiring Section WiringGeneral 454EPH02 Wiring Model 499A oxygen, chlorine, and ozone sensors Sensor WiringGeneral 4054eA01 4054eA03 4054eA02 4054eA04 4054eA07 Section Display and Operation Alarm StatusGeneral Description Display Program Settings List Section Software Configuration Choices Factory Settings Configure Choices Factory Settings Temperature compensation Section Menu Tree for the 54eA Controller Main Menu Main Alarm 2 setpoint Alarm setpoints Ranging the Outputs MA 0.00 ppm 20 mA 20.00 ppm Output 1 12.00 mA Output setpoints Alarm setpointsSimulated test Setpoint 1.000 ppm 4mA 0.000 ppm 20mA 10.00 ppm Simulated tests Test alarm 1 OpenTest output Display Configure Temp units C Output 1 mA Output 2 mA Display contrast Timeout OnLanguage English Display left Display right Out Output 1 control OutputsOutput Measurement Output 1 Setup Ctrl mode NormalOutput 1 Control Range 4-20 mA Dampen 0 sec Hold Last Value Using hold Hold setup Always configure the control parameters Before making Changing Alarm ParametersChanges in the alarm setup Alarm Control Settings Alarm 1 setup Alarm 1 controlAlarm 2 control Alarm Low Setpoint 0.000 ppm High Alarm Low Alarm Feed limit Disable Alarm FaultTimeout 3600 sec Feed limit timer setup Interval timer Alarm 4 setup Feed limit timerTimer Disable Timer Time activated Interval 24.0 hr Interval timer setup PH sensor Disable PH sensor EnableUsing the 499ACL-01 sensor PH comp Manual PH value 7.00 pH Glass imp lo 20 MΩ Diagnostics OffAutocal Standard Operate iso 7.00 pH Sensor iso 7.00 pH Temp coeff Temp comp Auto Temperature Compensation and Temperature UnitsTemp units C Temp comp Manual Temp units C Noise Reduction 60 Hz Main sensor cal Bar units mm Hg Bar meas AutoBarometric Pressure Noise rejection Main sensor cal Lock program Lock configSecurity Lock all Condition Definitions Controller Mode PriorityAction Definitions Introduction Section Calibration Temperature Temperature Calibration Adjust temp + 025.1 C Dissolved Oxygen Concentration Section Calibration Dissolved Oxygen Zeroing the Sensor Sensor must be in zero solution Calibrating the Sensor in AIR Stabilizing . . . Wait Section Calibrating the Sensor Against a Standard Instrument Calibrate 8.32 ppm Calibrate main sensor Zero main sensor Adjust temperatureStandardize Calibrating Barometric Pressure Sensor Current as a Function of Free Chlorine Concentration Section Calibration Free Chlorine 499ACL-01 Calibrate main sensor Full Scale Calibration Calibrate 1.100 ppm Output trim Dual range calCalibrate low point Dual Slope Calibration Calibrate high point Low point 2.000 ppm Introduction Section Calibration Free Chlorine 498CL-01 Ppm 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 Monochloramine Ppm 100ppm Sensor Current as a Function of Ozone Concentration Section Calibration Ozone Ppm 100ppm PH at 25C Standards Nominal pH Section Automatic TWO-POINT Calibration Autocal buffer 10.02 pH Pt 04.00pH 25C Calibrate pointManual TWO-POINT Calibration Pt 4.00pH 25.0C 10.01 pH Pt calibration Standardize pH pH slope Standardization ONE-POINT Calibration PH slope 60.00 mV/pH Trimming the Outputs Section Calibration Current Outputs PID Control Code Section PID and TPC Control Control Loop Adjustment and Tuning Proportional Gain Plus Integral ResetProcess Reaction Curve Method Process Reaction Curve Section Time Proportional Control TPC Mode Code Troubleshooting When a Fault Message is Showing Section TroubleshootingFault message Explanation See Section Overview High input current Temperature error low or highCheck sensor zero PH low or high input voltage Problem See Section Troubleshooting When no Fault Message is Showing OxygenSense line open Failure factory and Failure eeprom Zero current is too high Possible error warning during in-process calibrationZero reading Is unstable Process readings are erratic Barometric pressure reading is too high or too lowReadings drift Sensor does not respond to changes in oxygen level Zero current is unstable Problem Sensor can be calibrated, but the current is too low Chlorine readings are too low Sensor does not respond to changes in chlorine level Problem 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 level Troubleshooting 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 noisy Problem Action Troubleshooting not Related to Measurement ProblemsSimulating Inputs Dissolved Oxygen Sensor Polarizing Voltage Resistance Expected current Simulate Chlorine and Ozone 103 Simulating Inputs Other Amperometric Measurements Voltage mV PH at 25C Simulating pH input when the preamplifier is in the sensor104 Simulating temperature Simulating Temperature105 106 Measuring Reference Voltage Replacement Parts Part Number Description Section Maintenance General Section Return of Material Warranty Specifications subject to change without notice