Teledyne 3000ZA-3X Routine Maintenance, Sensor Replacement, Removing the Sensor

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Trace Oxygen Analyzer	Maintenance

Maintenance

5.1 Routine Maintenance

Aside from normal cleaning and checking for leaks at the gas connections, routine maintenance is limited to replacing the sensors and fuses, and recalibration. For recalibration, see Section 4.4 Calibration.

WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS

MANUAL.

5.2 Sensor Replacement

The ZrO2 sensors are sealed transducers with no electrolyte to change or electrodes to clean. When the sensor reaches the end of its useful life, it is replaced. The spent sensor should be discarded according to local regulations.

5.2.1 Removing the Sensor

The ZrO2 sensors is located inside the nylon cell block behind the front panel.

To remove an existing cell (refer to Figure 5-1):

CAUTION: POWER IS APPLIED TO THE INSTRUMENT CIRCUITRY WHENEVER THE INSTRUMENT IS CONNECTED TO THE POWER SOURCE. THE RED SWITCH ON THE FRONT PANEL IS FOR SWITCHING POWER ON OR OFF TO THE DISPLAYS AND OUTPUTS ONLY.

1.Remove power to the instrument by unplugging the power cord at the power source.


Teledyne Analytical Instruments	45

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Contents Model 3000ZA-3X 3000ZA-3X Specific Model Information Important Notice Safety Messages 3000ZA-3X Vii Table of Contents Testing the System Appendix MaintenanceModel 3000ZA Rear Panel Model 3000ZA Front PanelXii List of TablesIntroduction Main Features of the AnalyzerOverview Typical ApplicationsIntroduction 3000ZA-3X Model DesignationsModel 3000ZA Front Panel Front Panel Operator InterfaceData Entry Keys Function KeysDigital Meter Display Alphanumeric Interface ScreenAccess Door Rear Panel Equipment InterfaceStandby Button Optional ∙ 50-Pin Equipment Interface PortIntroduction Operational TheoryZrO2 Sensor Principles of OperationOperational Theory 3000ZA-3X Sample SystemZirconium Oxide Sensor Application Notes Electronics and Signal ProcessingOperational Theory 3000ZA-3X Component Location Electronic Block Diagram Installation Unpacking the AnalyzerMounting the Analyzer Installation 3000ZA-3X Gas Connections Rear Panel ConnectionsInstallation3000ZA-3X Electrical Connections Zero in and Span in OptionalEquipment Interface Connector Pin Arrangement Analog Output Connections Threshold AlarmAlarm Relay Contact Pins System AlarmRemote Calibration Connections Range ID Relay Connections Remote Probe Connections 2.3 RS-232 Port FET Series ResistanceCommands via RS-232 Input Testing the System Installing the Zirconium Oxide SensorsOperation Using the Data Entry and Function Buttons Style ConventionsKeys Description Escape EnterMenu/Screen Structure Analyze ScreenSystem Menu Hierarchy of Available Functions Enter Password T a Password routineChange Password Enter New Password T aModel Routine Logout RoutineAnalog-Out Adjust Routine Self-Test RoutineFilter Routine 20mA Gain 20mA Limit False Track in Cal Yes Auto-Calibration Timer Span MenuChange Stream Span Timer Span SensorSpan Value Span Auto Finish Span FinishSpan Begin Span Begin Begin Span?Zero Menu Zero FinishZero Value Zero Timer 7 min Zero TimerZero Begin Zero Begin Begin Zero?Alarm Active Alarms MenuAlarm Polarity AL-1 NON-LATCHING AL-1 20.00 ppm AL-2 ActiveAlarm Latching Alarm FailsafeAlarm Setpoint AL-1 80.00 ppmRange Menu Range SelectRange Select Auto Range Setpoints Manual Range SelectRoutine Maintenance MaintenanceSensor Replacement Removing the SensorMaintenance 3000ZA-3X Sensor Block with Middle Sensor Installed Fuse ReplacementSelf-Test Result Display System Self Diagnostic TestRear Panel Removal Remove only those screws marked with an Major Internal ComponentsTroubleshooting CleaningTrace Oxygen Analyzer Maintenance Maintenance 3000ZA-3X Teledyne Analytical Instruments Appendix SpecificationsOperating Temperature 5-35 C Qty Part Number Description Recommended 2-Year Spare Parts List19-inch Relay Rack Panel Mount Drawing ListFlow Rate Recommendations Application NotesRestriction Devices BY-PASS Conversions