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Teledyne API - Model T200H/T200M Operation Manual Table of Contents
xiii
7.2.1. T200H Internal Gas Flow Diagrams......................................................................................................................226
7.2.2. T200M Internal Gas Flow Diagrams.....................................................................................................................229
7.2.3. Zero or Low Flow Problems..................................................................................................................................231
7.2.4. High Flow..............................................................................................................................................................233
7.2.5. Sample Flow is Zero or Low But Analyzer Reports Correct Flow.........................................................................233
7.3. Calibration Problems....................................................................................................................................................234
7.3.1. Negative Concentrations ......................................................................................................................................234
7.3.2. No Response........................................................................................................................................................234
7.3.3. Unstable Zero and Span.......................................................................................................................................235
7.3.4. Inability to Span - No SPAN Key ..........................................................................................................................235
7.3.5. Inability to Zero - No ZERO Button.......................................................................................................................236
7.3.6. Non-Linear Response...........................................................................................................................................236
7.3.7. Discrepancy Between Analog Output and Display ...............................................................................................237
7.3.8. Discrepancy between NO and NO
X
slopes...........................................................................................................237
7.4. Other Performance Problems.......................................................................................................................................237
7.4.1. Excessive noise....................................................................................................................................................238
7.4.2. Slow Response.....................................................................................................................................................238
7.4.3. Auto-zero Warnings..............................................................................................................................................238
7.5. Subsystem Checkout ...................................................................................................................................................239
7.5.1. Simple Leak Check using Vacuum and Pump......................................................................................................239
7.5.2. Detailed Leak Check Using Pressure ...................................................................................................................239
7.5.3. Performing a Sample Flow Check ........................................................................................................................240
7.5.4. AC Power Configuration .......................................................................................................................................241
7.5.5. DC Power Supply Test Points ..............................................................................................................................245
7.5.6. I
2
C Bus .................................................................................................................................................................245
7.5.7. Touch Screen Interface ........................................................................................................................................246
7.5.8. LCD Display Module.............................................................................................................................................246
7.5.9. General Relay Board Diagnostics.........................................................................................................................246
7.5.10. Motherboard .......................................................................................................................................................247
7.5.11. CPU....................................................................................................................................................................249
7.5.12. RS-232 Communication......................................................................................................................................250
7.5.13. PMT Sensor........................................................................................................................................................251
7.5.14. PMT Preamplifier Board .....................................................................................................................................251
7.5.15. High Voltage Power Supply................................................................................................................................251
7.5.16. Pneumatic Sensor Assembly..............................................................................................................................252
7.5.17. NO
2
Converter ....................................................................................................................................................253
7.5.18. O
3
Generator ......................................................................................................................................................255
7.5.19. Box Temperature................................................................................................................................................255
7.5.20. PMT Temperature...............................................................................................................................................255
7.6. Repair Procedures .......................................................................................................................................................256
7.6.1. Disk-on-Module Replacement ..............................................................................................................................256
7.6.2. O
3
Generator Replacement ..................................................................................................................................257
7.6.3. Sample and Ozone Dryer Replacement ...............................................................................................................257
7.6.4. PMT Sensor Hardware Calibration.......................................................................................................................258
7.6.5. Replacing the PMT, HVPS or TEC.......................................................................................................................260
7.7. Removing / Replacing the Relay PCA from the Instrument..........................................................................................263
7.8. Frequently Asked Questions ........................................................................................................................................264
7.9. Technical Assistance....................................................................................................................................................265
8. Principles of Operation.........................................................................................................................................................267
8.1. Measurement Principle.................................................................................................................................................267
8.1.1. Chemiluminescence .............................................................................................................................................267
8.1.2. NO
X
and NO
2
Determination.................................................................................................................................269
8.2. Chemiluminescence Detection.....................................................................................................................................270
8.2.1. The Photo Multiplier Tube.....................................................................................................................................270
8.2.2. Optical Filter .........................................................................................................................................................270
8.2.3. Auto Zero..............................................................................................................................................................271
8.2.4. Measurement Interferences..................................................................................................................................272
8.3. Pneumatic Operation....................................................................................................................................................274
8.3.1. Pump and Exhaust Manifold.................................................................................................................................274
8.3.2. Sample Gas Flow .................................................................................................................................................275
8.3.3. Flow Rate Control - Critical Flow Orifices.............................................................................................................276
8.3.4. Sample Particulate Filter.......................................................................................................................................280
8.3.5. Ozone Gas Air Flow..............................................................................................................................................281
8.3.6. O
3
Generator ........................................................................................................................................................282
8.3.7. Perma Pure
®
Dryer...............................................................................................................................................283
07270B DCN6512