Teledyne 6200T - Sulfides Analyzer - Manual (Page 12)

Table of Contents Model 6200T Total Sulfur Analyzer
Teledyne Analytical Instruments xii
11. INSTRUMENT MAINTENANCE ...................................................................................... 225
11.1. Maintenance Schedule ...........................................................................................................................226
11.2. Predictive Diagnostics ............................................................................................................................227
11.3. Maintenance Procedures........................................................................................................................228
11.3.1. Changing the Sample Particulate Filter .............................................................................................228
11.3.2. Changing the IZS Permeation Tube ..................................................................................................229
11.3.3. Changing theTS and Zero Air Scrubber Materials .............................................................................229
11.3.4. Changing the Critical Flow Orifice .....................................................................................................230
11.3.5. Checking for Light Leaks ...................................................................................................................231
11.3.6. Detailed Pressure Leak Check ..........................................................................................................232
11.3.7. Performing a Sample Flow Check .....................................................................................................233
11.3.8. Hydrocarbon Scrubber (Kicker) .........................................................................................................233
12. TROUBLESHOOTING & SERVICE ................................................................................ 237
12.1. General Troubleshooting .......................................................................................................................237
12.1.1. Fault Diagnostics with Warning Messages ........................................................................................239
12.1.2. Fault Diagnosis with Test Functions ..................................................................................................242
12.1.3. Using the Diagnostic Signal I/O Functions ........................................................................................243
12.2. Status LEDs .............................................................................................................................................245
12.2.1. Motherboard Status Indicator (Watchdog) .........................................................................................245
12.2.2. CPU Status Indicators ........................................................................................................................245
12.2.3. Relay Board Status LEDs ..................................................................................................................246
12.3. Gas Flow Problems .................................................................................................................................246
12.3.1. Zero or Low Sample Flow ..................................................................................................................246
12.3.2. High Flow ...........................................................................................................................................247
12.4. Calibration Problems ..............................................................................................................................247
12.4.1. Negative Concentrations....................................................................................................................247
12.4.2. No Response .....................................................................................................................................247
12.4.3. Unstable Zero and Span ....................................................................................................................248
12.4.4. Inability to Span - No SPAN Button ...................................................................................................248
12.4.5. Inability to Zero - No ZERO Button ....................................................................................................249
12.4.6. Non-Linear Response ........................................................................................................................249
12.4.7. Discrepancy Between Analog Output and Display ............................................................................249
12.5. Other Performance Problems ................................................................................................................250
12.5.1. Excessive noise .................................................................................................................................250
12.5.2. Slow Response ..................................................................................................................................250
12.5.3. The Analyzer Doesn’t Appear on the LAN or Internet .......................................................................250
12.6. Subsystem Checkout ..............................................................................................................................250
12.6.1. AC Power Configuration ....................................................................................................................251
12.6.2. DC Power Supply ...............................................................................................................................252
12.6.3. I 2 C Bus ...............................................................................................................................................252
12.6.4. Touch-screen Interface ......................................................................................................................253
12.6.5. LCD Display Module ..........................................................................................................................253
12.6.6. Relay Board .......................................................................................................................................253
12.6.7. Motherboard .......................................................................................................................................254
12.6.8. CPU ....................................................................................................................................................255
12.6.9. RS-232 Communication .....................................................................................................................256
12.6.10. Shutter System ................................................................................................................................257
12.6.11. PMT Sensor .....................................................................................................................................257
12.6.12. PMT Preamplifier Board ...................................................................................................................257
12.6.13. PMT Temperature Control PCA .......................................................................................................257
12.6.14. High Voltage Power Supply .............................................................................................................258
12.6.15. Pneumatic Sensor Assembly ...........................................................................................................259
12.6.16. Sample Pressure .............................................................................................................................259
12.6.17. IZS Option ........................................................................................................................................259
12.6.18. Box Temperature .............................................................................................................................260
12.6.19. PMT Temperature ............................................................................................................................260
12.7. Service Procedures .................................................................................................................................261
12.7.1. Disk-on-Module Replacement ...........................................................................................................261