TAI Model 6400A SO
2
Analyzer Operator Manual, 02164, Rev. G
iii
8 MAINTENANCE........................................................................................8-1
8.1 MAINTENANCE SCHEDULE...........................................................................................8-1
8.2 REPLACING THE SAMPLE PARTICULATE FILTER.............................................................8-2
8.3 REPLACING THE PERMEATION TUBE (OPTION)...............................................................8-4
8.4 REPLACING THE IZS ZERO AIR SCRUBBER (OPTION).....................................................8-4
8.5 CLEANING ORIFICE AND ORIFICE FILTER ......................................................................8-5
8.6 CLEANING THE REACTION CELL...................................................................................8-6
8.7 PNEUMATIC LINE INSPECTION......................................................................................8-6
8.8 LEAK CHECK PROCEDURE...........................................................................................8-9
8.9 LIGHT LEAK CHECK PROCEDURE...............................................................................8-10
8.10 EPROM REPLACEMENT PROCEDURE......................................................................8-10
9 DIAGNOSTIC, TROUBLESHOOTING......................................................9-1
9.1 OPERATION VERIFICATION - 6400A DIAGNOSTIC TECHNIQUES.......................................9-3
9.1.1 Fault Diagnosis with TEST Variables.................................................................9-3
9.1.2 Fault Diagnosis with WARNING Messages.......................................................9-9
9.1.3 Fault Diagnosis using DIAGNOSTIC Mode.....................................................9-11
9.1.4 6400A Internal Variables .................................................................................9-18
9.1.5 Test Channel Analog Output ...........................................................................9-20
9.1.6 Factory Calibration Procedure (Quick Cal)......................................................9-21
9.2 PERFORMANCE PROBLEMS .......................................................................................9-23
9.2.1 AC Power Check .............................................................................................9-23
9.2.2 Flow Check......................................................................................................9-24
9.2.3 No Response to Sample Gas..........................................................................9-24
9.2.4 Negative Concentration Display.......................................................................9-25
9.2.5 Excessive Noise ..............................................................................................9-25
9.2.6 Unstable Span.................................................................................................9-26
9.2.7 Unstable Zero..................................................................................................9-27
9.2.8 Inability to Span...............................................................................................9-27
9.2.9 Inability to Zero................................................................................................9-28
9.2.10 Non-Linear Response....................................................................................9-28
9.2.11 Slow Response..............................................................................................9-29
9.2.12 Analog Output Doesn't Agree With Display Concentration............................9-29
9.3
ELECTRONIC SUBSYSTEM TROUBLESHOOTING AND ADJUSTMENTS...............................9-30
9.3.1 Computer, Display, Keyboard..........................................................................9-30
9.3.2 RS-232 Communications.................................................................................9-33
9.3.3 Voltage/Frequency (V/F) Board.......................................................................9-36
9.3.4 Status/Temp Board..........................................................................................9-42
9.3.5 Power Supply Module......................................................................................9-45
9.3.6 Flow/Pressure Sensor .....................................................................................9-49
9.3.7 Reaction Cell Temp.........................................................................................9-53
9.3.8 Preamp Board .................................................................................................9-53
9.3.9 PMT Cooler .....................................................................................................9-53
9.3.10 HVPS (High Voltage Power Supply)..............................................................9-56