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Teledyne API Model T360/T360M Operation Manual
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7.1.1. Beer’s Law..............................................................................................................................................193
7.1.2. Measurement Fundamentals ..................................................................................................................194
7.1.3. Gas Filter Correlation..............................................................................................................................194
7.1.4. Interference and Signal to Noise Rejection.............................................................................................197
7.2. Oxygen Sensor (OPT 65)...............................................................................................................................198
7.2.1. Paramagnetic Measurement of O
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..........................................................................................................198
7.3. Pneumatic Operation......................................................................................................................................200
7.3.1. Sample Gas Flow ...................................................................................................................................200
7.3.2. Flow Rate Control...................................................................................................................................201
7.3.3. Purge Gas Pressure Control...................................................................................................................202
7.3.4. Particulate Filter......................................................................................................................................202
7.3.5. Pneumatic Sensors.................................................................................................................................202
7.3.6. Pneumatic Operation of the O
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Sensor...................................................................................................203
7.4. Electronic Operation.......................................................................................................................................204
7.4.1. Overview.................................................................................................................................................204
7.4.2. CPU........................................................................................................................................................206
7.4.3. Optical Bench & GFC Wheel ..................................................................................................................207
7.4.4. Synchronous Demodulator (Sync/Demod) Assembly.............................................................................210
7.4.5. Relay Board............................................................................................................................................212
7.4.6. Motherboard ...........................................................................................................................................215
7.4.7. I
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C Data Bus...........................................................................................................................................217
7.4.8. Power Supply/ Circuit Breaker................................................................................................................218
7.5. Front Panel Touchscreen/Display Interface ...................................................................................................219
7.5.1. LVDS Transmitter Board.........................................................................................................................219
7.5.2. Front Panel Touchscreen/Display Interface PCA....................................................................................219
7.6. Software Operation ........................................................................................................................................220
7.6.1. Adaptive Filter.........................................................................................................................................220
7.6.2. Calibration - Slope and Offset.................................................................................................................221
7.6.3. Measurement Algorithm..........................................................................................................................221
7.6.4. Temperature and Pressure Compensation.............................................................................................222
7.6.5. Internal Data Acquisition System (DAS) .................................................................................................222
8. TROUBLESHOOTING AND SERVICE .................................................................................................................223
8.1. General Troubleshooting Hints.......................................................................................................................223
8.1.1. Interpreting WARNING Messages..........................................................................................................224
8.1.2. Fault Diagnosis with TEST Functions.....................................................................................................228
8.1.3. Using the Diagnostic Signal I/O Function ...............................................................................................230
8.1.4. Internal Electronic Status LEDs ..............................................................................................................231
8.2. Gas Flow Problems........................................................................................................................................235
8.2.1. T360 Internal Gas Flow Diagrams ..........................................................................................................236
8.2.2. Typical Sample Gas Flow Problems.......................................................................................................238
8.2.3. Poor or Stopped Flow of Purge Gas.......................................................................................................240
8.3. Calibration Problems......................................................................................................................................241
8.3.1. Miscalibrated...........................................................................................................................................241
8.3.2. Non-Repeatable Zero and Span.............................................................................................................242
8.3.3. Inability to Span – Touchscreen SPAN Button Not Visible .....................................................................242
8.3.4. Inability to Zero – Touchscreen ZERO Button Not Visible ......................................................................243
8.4. Other Performance Problems.........................................................................................................................244
8.4.1. Temperature Problems ...........................................................................................................................244
8.4.2. Excessive Noise .....................................................................................................................................246
8.5. Subsystem Checkout .....................................................................................................................................247
8.5.1. AC Mains Configuration..........................................................................................................................247
8.5.2. DC Power Supply ...................................................................................................................................247
8.5.3. I
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C Bus....................................................................................................................................................248
8.5.4. Touchscreen Interface............................................................................................................................248
8.5.5. LCD Display Module...............................................................................................................................249
8.5.6. Relay Board............................................................................................................................................249
8.5.7. Sensor Assembly....................................................................................................................................249
8.5.8. Motherboard ...........................................................................................................................................252
8.5.9. CPU........................................................................................................................................................254
8.5.10. RS-232 Communications......................................................................................................................255
8.6. Repair Procedures .........................................................................................................................................256
8.6.1. Repairing Sample Flow Control Assembly..............................................................................................256
07272B DCN6552