Teledyne API Model T360/T360M Operation Manual
07272D DCN8356 xi
7.1.2. Measurement Fundamentals .................................................................................................................. 188
7.1.3. Gas Filter Correlation .............................................................................................................................. 188
7.1.4. Interference and Signal to Noise Rejection ............................................................................................. 191
7.2. Oxygen Sensor (OPT 65) ............................................................................................................................... 192
7.2.1. Paramagnetic Measurement of O
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.......................................................................................................... 192
7.3. Pneumatic Operation ...................................................................................................................................... 194
7.3.1. Sample Gas Flow ................................................................................................................................... 194
7.3.2. Flow Rate Control ................................................................................................................................... 195
7.3.3. Purge Gas Pressure Control ................................................................................................................... 196
7.3.4. Particulate Filter ...................................................................................................................................... 196
7.3.5. Pneumatic Sensors ................................................................................................................................. 196
7.3.6. Pneumatic Operation of the O
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Sensor ................................................................................................... 197
7.4. Electronic Operation ....................................................................................................................................... 197
7.4.1. Overview ................................................................................................................................................. 197
7.4.2. CPU ........................................................................................................................................................ 200
7.4.3. Optical Bench & GFC Wheel .................................................................................................................. 201
7.4.4. Synchronous Demodulator (Sync/Demod) Assembly ............................................................................. 204
7.4.5. Relay Board ............................................................................................................................................ 206
7.4.6. Motherboard ........................................................................................................................................... 208
7.4.7. I
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C Data Bus ........................................................................................................................................... 211
7.4.8. Power Supply/Circuit Breaker ................................................................................................................. 212
7.5. Front Panel Touchscreen/Display Interface ................................................................................................... 213
7.5.1. LVDS Transmitter Board ......................................................................................................................... 213
7.5.2. Front Panel Touchscreen/Display Interface PCA .................................................................................... 213
7.6. Software Operation ........................................................................................................................................ 214
7.6.1. Adaptive Filter ......................................................................................................................................... 214
7.6.2. Calibration - Slope and Offset ................................................................................................................. 215
7.6.3. Measurement Algorithm .......................................................................................................................... 215
7.6.4. Temperature and Pressure Compensation ............................................................................................. 216
7.6.5. Internal Data Acquisition System (DAS) ................................................................................................. 216
8. TROUBLESHOOTING AND SERVICE ................................................................................................................. 217
8.1. General Troubleshooting Hints ....................................................................................................................... 217
8.1.1. Interpreting WARNING Messages .......................................................................................................... 218
8.1.2. Fault Diagnosis with TEST Functions ..................................................................................................... 222
8.1.3. Using the Diagnostic Signal I/O Function ............................................................................................... 224
8.1.4. Internal Electronic Status LEDs .............................................................................................................. 225
8.2. Gas Flow Problems ........................................................................................................................................ 229
8.2.1. T360 Internal Gas Flow Diagrams .......................................................................................................... 230
8.2.2. Typical Sample Gas Flow Problems ....................................................................................................... 232
8.2.3. Poor or Stopped Flow of Purge Gas ....................................................................................................... 234
8.3. Calibration Problems ...................................................................................................................................... 235
8.3.1. Miscalibrated ........................................................................................................................................... 235
8.3.2. Non-Repeatable Zero and Span ............................................................................................................. 235
8.3.3. Inability to Span – Touchscreen SPAN Button Not Visible ..................................................................... 236
8.3.4. Inability to Zero – Touchscreen ZERO Button Not Visible ...................................................................... 236
8.4. Other Performance Problems ......................................................................................................................... 237
8.4.1. Temperature Problems ........................................................................................................................... 237
8.4.2. Excessive Noise ..................................................................................................................................... 239
8.5. Subsystem Checkout ..................................................................................................................................... 240
8.5.1. AC Mains Configuration .......................................................................................................................... 240
8.5.2. DC Power Supply ................................................................................................................................... 240
8.5.3. I
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C Bus .................................................................................................................................................... 241
8.5.4. Touchscreen Interface ............................................................................................................................ 241
8.5.5. LCD Display Module ............................................................................................................................... 241
8.5.6. Relay Board ............................................................................................................................................ 242
8.5.7. Sensor Assembly .................................................................................................................................... 242
8.5.8. Motherboard ........................................................................................................................................... 244
8.5.9. CPU ........................................................................................................................................................ 246
8.5.10. RS-232 Communications ...................................................................................................................... 247
8.6. Service Procedures ........................................................................................................................................ 248
8.6.1. Servicing the Sample Flow Control Assembly ........................................................................................ 248
8.6.2. Removing/Replacing the GFC Wheel ..................................................................................................... 249