Emerson 51-DO-04, DO-03 Calibrate main sensor, Zero main sensor Adjust temperature, Standardize

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MODEL DO-03/04	SECTION 7.0
	CALIBRATION - DISSOLVED OXYGEN

7.5CALIBRATING BAROMETRIC PRESSURE

1.If the barometric pressure measured by the analyzer does not agree with the local barometric pressure, cali- brate the pressure sensor. A pressure error of 3 mm Hg introduces an error of about 0.5% in the final meas- urement. When calibrating the pressure reading, be sure to use the actual barometric pressure. Weather fore- casters and airports usually report barometric pressure corrected to sea level; they do not report the acutal pressure. It is good practice to open the enclosure door before starting a barometric pressure calibration. When gland fittings are used, the analyzer enclosure is moderately airtight. As the analyzer enclosure heats or cools, the pressure of the air trapped inside the enclosure may be as much as 5% different from ambient pressure.

2.From the main display, press any key. With the cursor on “Calibrate,” press Enter (F4).

3.Press Enter (F4) to select “Calibrate main sensor.”

Calibrate main sensor

Zero main sensor

Adjust temperature

ExitEnter

Calibrate in air Calibrate in process Barometric pressure

4.Press the key twice to move the cursor to “Barometric pressure.” Press Enter (F4).

ExitEnter

763mm Hg

Standardize : 760

ExitEdit

5.Press Edit (F4). Use the arrow keys to change the pressure reading to the desired value. Press Save (F4) to store the value.

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

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Contents Dissolved Oxygen Measurement System with Air Blast Cleaner Model DO-03/04Essential Instructions Page Model DO-03/04 Measuring System Section TitleList of Tables 10.011.0 List of Figures Section TitleIii Section Specifications Features and BenefitsRFI/EMI EN-61326 PowerRepeatability ±0.05 ppm 25C Output Accuracy ± 0.05 mAMaximum continuous pressure 50 psig 446 kPa abs Maximum distance between compressor and sensorMaterials of Construction Analyzer dimensions Enclosure dimensions Power required selection Description9240048-00 Tag, stainless steel, specify marking Unpacking and Inspection Section InstallationInstallation Model or part number DescriptionInstalling the air compressor enclosure Installing the handrail mounting assemblyAssembling the pipe and pipe clamp Installing the sensor in the washer head assembly Attaching the pipe boom to the handrail mounting assemblyAssembling the washer head and pipe boom Attaching the air compressor enclosure to the handrail Installing the sensor in the washer head assembly Section Wiring POWER, ALARM, and Output WiringGeneral 454EPH02 Section Section Sensor Wiring Wiring the Oxygen SensorGeneral Display Alarm StatusSection Display and Operation KEY Functions and ControlSection Software Configuration Menu Tree for the 54eA AnalyzerOn following Main Menu Calibrate See Diagnostic Variable see Program Settings List Choices Factory Settings SetpointsChoices Factory Settings Configure Choices Factory Settings Alarm 2 setpoint Alarm setpointsAlarm 1 setpoint Alarm 3 setpointMA 0.00 ppm 20 mA 20.00 ppm Output 1 12.00 mA Ranging the OutputsTest alarm 1 Open Simulated testsTest output Measure Oxygen Outputs AlarmsDisplay Meas units ppmDisplay contrast Timeout On Temp units C Output 1 mA Output 2 mALanguage English Display left Display right Out Outputs Output 1 controlOutput Measurement Output 1 Setup Output 1 ControlRange 4-20 mA Dampen 0 sec Hold Last Value Alarm 1 setup Alarm 2 control ConfigureAlarm 1 control Changing Alarm ParametersAlarm Low Alarm 1 controlAlarm 1 setup Activate ProcessTimeout 3600 sec Alarm FaultFeed limit Disable Alarm 4 setupTimer Disable Timer Time activated Interval 24.0 hr Alarm 4 setup Feed limit timerInterval timer Interval timer setupTemp units C Temperature Compensation and Temperature UnitsTemp comp Auto Temp comp Manual Temp units C60 Hz Noise ReductionBar meas Auto Bar units mm HgBarometric Pressure Main sensor cal Salinity 0.0 o/ooNoise rejection Main sensor cal Security SecurityAnalyzer Mode Priority Condition DefinitionsAction Definitions Section Calibration Temperature IntroductionAdjust temp + 025.1 C Temperature CalibrationSection Calibration Dissolved Oxygen Sensor Current as a Function Dissolved Oxygen ConcentrationSensor must be in zero solution Zeroing the SensorStabilizing . . . Wait Calibrating the Sensor in AIRSection Calibrate 8.32 ppm Calibrating the Sensor Against a Standard InstrumentStandardize Zero main sensor Adjust temperatureCalibrate main sensor Calibrating Barometric PressureSection Calibration Current Outputs Trimming the OutputsCleaning the membrane Section MaintenanceReplacement Parts Replacing electrolyte solution and membraneSection Power Fuse Spare PartsReplacement Parts Location Part Number Description AIR Blast Sensor WasherFault message Explanation See Section Section TroubleshootingTroubleshooting When a Fault Message is Showing OverviewCheck sensor zero Temperature error low or highHigh input current Sense line openTroubleshooting When no Fault Message is Showing Oxygen Problem See SectionZero current is too high Possible error warning during in-process calibration Zero reading Is unstableBarometric pressure reading is too high or too low Sensor does not respond to changes in oxygen level Process readings are erraticReadings drift Oxygen readings are too lowSimulating Inputs Dissolved Oxygen Troubleshooting not Related to Measurement ProblemsProblem Action Sensor Polarizing Voltage Resistance Expected currentSimulating Temperature Simulating temperatureSection Return of Material GeneralReturn of Materials Request Sensor or Circuit Board onlyWarranty Specifications subject to change without notice