Teledyne T101 Operation Manual page 17

Teledyne ML - T101 Operation Manual
9.5.12. PMT Sensor ........................................................................................................................... 232
9.5.13. PMT Preamplifier Board ......................................................................................................... 232
9.5.14. PMT Temperature Control PCA ............................................................................................... 232
9.5.15. High Voltage Power Supply .................................................................................................... 234
9.5.16. Pneumatic Sensor Assembly .................................................................................................. 234
9.5.16.1. Sample Pressure ............................................................................................................ 234
9.5.17. IZS Option ............................................................................................................................ 234
9.5.18. Box Temperature .................................................................................................................. 235
9.5.19. PMT Temperature .................................................................................................................. 235
9.6. Repair Procedures .......................................................................................................................... 235
9.6.1. Disk-on-Module Replacement .................................................................................................. 235
9.6.2. Adjusting the UV Lamp (Peaking the Lamp) ............................................................................. 236
9.6.3. Replacing the UV Lamp ........................................................................................................... 238
9.6.4. Factory Cal (PMT Sensor, Hardware Calibration) ...................................................................... 239
9.7. Frequently Asked Questions (FAQs) ................................................................................................ 241
9.8. Technical Assistance....................................................................................................................... 242
10. PRINCIPLES OF OPERATION...........................................................................................................245
10.1. Measurement Principle ................................................................................................................. 245
10.1.1. H S Conversion ..................................................................................................................... 245
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10.1.2. SO Ultraviolet Fluorescence ................................................................................................. 246
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10.2. The UV Light Path......................................................................................................................... 249
10.2.1. UV Source Lamp.................................................................................................................... 249
10.2.2. The Reference Detector ......................................................................................................... 250
10.2.3. The PMT ................................................................................................................................ 250
10.2.4. Optical Filters ........................................................................................................................ 251
10.2.4.1. UV Source Optical Filter .................................................................................................. 251
10.2.4.2. PMT Optical Filter ........................................................................................................... 251
10.2.5. Optical Lenses ....................................................................................................................... 252
10.2.6. Measurement Interferences ................................................................................................... 253
10.2.6.1. Direct Interference ......................................................................................................... 253
10.2.6.2. UV Absorption by Ozone ................................................................................................. 254
10.2.6.3. Dilution .......................................................................................................................... 254
10.2.6.4. Third Body Quenching .................................................................................................... 254
10.2.6.5. Light Pollution ................................................................................................................ 254
10.3. Pneumatic Operation .................................................................................................................... 255
10.3.1. Sample Gas Flow ................................................................................................................... 256
10.3.2. Multigas Measurement & H
10.3.3. Flow Rate Control .................................................................................................................. 257
10.3.3.1. Critical Flow Orifice......................................................................................................... 257
10.3.4. Sample Particulate Filter........................................................................................................ 258
10.3.5. Hydrocarbon Scrubber (Kicker).............................................................................................. 259
10.3.6. SO Scrubber ........................................................................................................................ 259
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10.3.7. Pneumatic Sensors ................................................................................................................ 260
10.3.7.1. Sample Pressure Sensor ................................................................................................. 260
10.3.7.2. Sample Flow Sensor ....................................................................................................... 260
10.4. Electronic Operation ..................................................................................................................... 261
10.4.1. CPU....................................................................................................................................... 263
10.4.1.1. Disk On Module (DOM) ................................................................................................... 263
10.4.1.2. Flash Chip ...................................................................................................................... 263
10.4.2. Sensor Module & Sample chamber......................................................................................... 264
10.4.3. Sample Chamber Heating Circuit ........................................................................................... 264
10.4.4. Photo Multiplier Tube (PMT) ................................................................................................... 265
10.4.5. PMT Cooling System .............................................................................................................. 266
10.4.5.1. Thermoelectric Cooler (TEC) ........................................................................................... 266
10.4.5.2. TEC Control Board .......................................................................................................... 267
10.4.6. PMT Preamplifier ................................................................................................................... 267
10.4.7. Pneumatic Sensor Board........................................................................................................ 269
10.4.8. Relay Board .......................................................................................................................... 269
10.4.8.1. Heater Control................................................................................................................ 269
10.4.8.2. Valve Control ................................................................................................................. 269
10.4.9. Status LEDs & Watch Dog Circuitry ........................................................................................ 270
10.4.10. Motherboard........................................................................................................................ 271
S  SO Switching Valve. ........................................................... 257
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TABLE OF CONTENTS
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