Teledyne 3000TA-XL-EU Calibration of the Analyzer, Span Gas Calibration, Air Calibration

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Trace Oxygen Analyzer

Operation 4

 

 

 

 

 

 

 

 

 

4.4Calibration of the Analyzer

The analyzer must be calibrated prior to its use. For most applications where the desired range of measurement is 0 to 1 ppm, we recommend the analyzer be calibrated using a span gas as detailed below:

Span Gas Calibration

Before the cell is ready for calibration, it must be purged with semple gas to low oxygen levels preferably below 0.2 ppm. However, if the oxygen contact of the sample gas is higher than 0.2 ppm, a zero gas such as nitrogen with oxygen levels below 0.2 ppm may be required.

The recommended span gas concentration is between 7.0 to 9.0 ppm oxygen in nitrogen, and will require calibration be performed in the 0-10 ppm analyzer range.

Air Calibration

If desired, a newly installed cell may be calibrated in air to 209,000 ppm. However, this practice is generally not recommended as the cell may take 24 hours or longer to recover to less than 0.2 ppm after being exposed to air for about 3 to 5 minutes.

4.4.1 Zero Cal

The B-2CXL cell has a zero offset of less than 0.2 ppm oxygen. Nor- mally, the offset slowly decreases during the first 7 to 10 days of operation, and is expected to reach a steady value after this time.

Generally, the value of the zero offset is part of the oxygen reading of the sample gas as shown by the analyzer readout. As an example, a reading of 0.5 ppm oxygen may include 0.4 ppm oxygen in the sample gas and a 0.1 ppm zero offset.

The determination of the zero offset requires the use of oxygen free gas to the analyzer. We recommend the use of nitrogen gas with a scrubber to assure oxygen levels below 0.02 ppm.

The user may decide to eliminate the zero offset for improved accu- racy. If so desired the analyzer is equipped to provide this function. How- ever, we do not recommend carying out the cal zero during the first 10 days of the operation of the cell.

Teledyne Analytical Instruments

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Contents Teledyne Analytical Instruments Trace Oxygen AnalyzerCopyright 1999 Teledyne Analytical Instruments Model 3000TA-XL-EUTrace Oxygen Analyzer Specific Model Information IiiProtective Earth Teledyne Analytical Instruments GroundOperation Trace Oxygen Analyzer Table of Contents IntroductionInstallation Operational TheoryAppendix MaintenanceTrace Oxygen Analyzer Appendix ViiViii Combustible GAS Usage WarningTrace Oxygen Analyzer Introduction Main Features of the AnalyzerOverview Typical ApplicationsIntroduction Model 3000TA-XL-EU Model DesignationsModel 3000TA-XL Front Panel Front Panel Operator InterfaceIntroduction Model 3000TA-XL-EU Analog Outputs Rear Panel Equipment InterfaceNetwork I/O RS-232 PortRemote Probe Principles of Operation Operational Theory IntroductionMicro-Fuel Cell Sensor Trace Oxygen Analyzer Operational TheoryAnatomy of a Micro-Fuel Cell Operational Theory Model 3000TA-XL-EU+ 2H 2O + 4e → 4OH Electrochemical ReactionsEffect of Pressure Calibration CharacteristicsSample System Characteristic Input/Output Curve for a Micro-Fuel CellTOP Flow Diagram-Sample Under Pressure Standard Model Electronic Component Location Inside the Model 3000TA-XL Electronics and Signal ProcessingBlock Diagram of the Model 3000TA-XL Electronics Operational Theory Model 3000TA-XL-EU Mounting the Analyzer Trace Oxygen Analyzer InstallationUnpacking the Analyzer Rear Panel Connections Installation Model 3000TA-XL-EURear Panel of the Model 3000TA-XL Gas ConnectionsElectrical Connections PrimaryInputPower2.2 50-Pin Equipment Interface Connector Pin Function Equipment Interface Connector Pin ArrangementPin Contact Remote Calibration Connections Range ID Relay Connections FET Series Resistance 2.3 RS-232 PortParameter Setting Command DescriptionTesting the System Installing the Micro-Fuel CellRemoving the Micro-Fuel Cell Auto Ranging on Trace Oxygen Analyzer OperationOperation Model 3000TA-XL-EU Using the Data Entry and Function ButtonsAnalyze System System FunctionOperation Model 3000TA-XL-EU Setting up an Auto-Cal Password Protection Entering the Password Installing or Changing the Password Logout System Self-Diagnostic TestVersion Screen Zero Cal Calibration of the AnalyzerSpan Gas Calibration Air CalibrationManual Mode Zeroing Auto Mode ZeroingCell Failure Operation Model 3000TA-XL-EU Span Cal Auto Mode SpanningManual Mode Spanning Span Failure Switching of Sample StreamsSpecial Notes on Hydrogen Gas Stream Alarms FunctionAL-1 AL-2 Choose Alarm Range Function Fixed Range Analysis Setting the Analog Output RangesAnalyze Function Signal OutputMED Range Voltage Current mAStoring and Handling Replacement Cells Routine MaintenanceCell Replacement Trace Oxygen Analyzer MaintenanceRemoving the Micro-Fuel Cell Maintenance Model 3000TA-XL-EU When to Replace a CellRemoving the Micro-Fuel Cell Warranty Removing Fuse Block from Housing Fuse ReplacementMajor Internal Components System Self Diagnostic TestMaintenance Model 3000TA-XL-EU Rear-Panel Screws CleaningSolution TroubleshootingSpecifications Appendix Operating Temperature 5-35 CRecommended 2-Year Spare Parts List 19-inch Relay Rack Panel Mount Drawing List3000XL Series Analyzers Conversions Page Material Safety Data Sheet Section IV Fire and Explosion Hazard Data Exposure Protective measures during cell replacementSection Viii Control Measures Read completely before beginning the procedure
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