Teledyne 3000ZA Routine Maintenance, Cell Replacement, Removing the Sensor

Page 64

Maintenance	3000ZA

Maintenance

5.1 Routine Maintenance

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

WARNING: SEE WARNINGS ON THE TITLE PAGE OF THIS MANUAL.

5.2 Cell Replacement

The ZrO2 sensor is a sealed transducer with no electrolyte to change or electrodes to clean. When the cell 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 sensor is located inside the nylon cell block behind the front panel.

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

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

2.Open the front panel door by pressing the release button on the top right corner of the door all the way in with a narrow gauge tool.

3.Unscrew the collar on the top assembly of the cell block from the bottom section of the cell block assembly. The sensor is attached to pin sockets on the bottom assembly.

Teledyne Analytical Instruments

52

Image 64

Contents Model 3000ZA 3000ZA Specific Model Information Important Notice Safety Messages 3000ZA Vii Table of Contents Maintenance OperationAppendix IndexList of Figures Model 3000ZA Front PanelList of Tables Main Features of the Analyzer IntroductionOverview Typical ApplicationsModel Designations Introduction 3000ZAFront Panel Operator Interface Model 3000ZA Front PanelIntroduction 3000ZA Rear Panel Equipment Interface Model 3000ZA Rear PanelPower Connection Universal AC power source Scheduled calibrations can vary 2-3 % per day Operational Theory IntroductionZrO2 Sensor Principles of OperationSample System Model 3000ZA Sample SystemElectronics and Signal Processing Zirconium Oxide Sensor Application NotesTrace Oxygen Analyzer Operational Theory Component Location Electronic Block Diagram Unpacking the Analyzer InstallationMounting the Analyzer Trace Oxygen Analyzer Installation Rear Panel Connections Gas ConnectionsSample Primary Input Power Electrical ConnectionsEquipment Interface Connector Pin Arrangement Analog Output Connections Alarm Relay Contact Pins Remote Calibration Connections Range ID Relay Connections Remote Probe Connections Commands via RS-232 Input 2.3 RS-232 PortInstalling the Zirconium Oxide Sensor Testing the SystemTrace Oxygen Analyzer Installation Operation Using the Data Entry and Function Buttons Hierarchy of Available Functions System Function TRAK/HLD Auto-Cal Pswd Logout More Setting up an Auto-Cal Password Protection Pswd Restrictions Removed Retype PWD To Verify System Self-Diagnostic Test LogoutVersion Screen Showing Negative Oxygen ReadingsZero and Span Functions Zero Cal Zero Settling Man ENT To Begin Span Cal #### ppm Span Slope=#### ppm/s Span Failure Alarms Function AL-1 AL-2 Choose Alarm Setting the Analog Output Ranges Range FunctionFixed Range Analysis Signal Output Analyze FunctionRange ID Output Voltage Page Maintenance Routine MaintenanceCell Replacement Removing the SensorFuse Replacement Trace Oxygen Analyzer MaintenanceSystem Self Diagnostic Test Installing FusesMajor Internal Components Rear Panel Removal Remove only those screws marked with anCleaning TroubleshootingIf erratic behavior Specifications AppendixTrace Oxygen Analyzer Appendix Recommended 2-Year Spare Parts List Drawing List 19-inch Relay Rack Panel MountApplication Notes Flow Rate RecommendationsBY-PASS Conversions PSI Scfh = 0.476 Slpm Index Trace Oxygen Analyzer Index Relay connections, 22 relay contacts Trace Oxygen Analyzer Index Teledyne Analytical Instruments