Table of Contents Model 400E Ozone Analyzer
Instruction Manual
vi P/N 04316 Rev: B
8.4.1. Linearity Test....................................................................................................................... 194
8.4.2. O
3
Loss Correction Factor.................................................................................................. 195
8.4.3. Span Drift Check................................................................................................................. 196
8.5. AUDITING PROCEDURES ................................................................................................................ 197
8.5.1. Multipoint Calibration Audit................................................................................................. 197
8.5.2. Data Processing Audit ........................................................................................................ 198
8.5.3. System Audit....................................................................................................................... 199
8.5.4. Assessment of Monitoring Data for Precision and Accuracy............................................. 199
8.6. SUMMARY OF QUALITY ASSURANCE CHECKS................................................................................. 199
8.7. REFERENCES................................................................................................................................. 203
9. MAINTENANCE SCHEDULE & PROCEDURES...........................................205
9.1. MAINTENANCE SCHEDULE.............................................................................................................. 205
9.2. PREDICTING FAILURES USING THE TEST FUNCTIONS ..................................................................... 207
9.3. MAINTENANCE PROCEDURES......................................................................................................... 208
9.3.1. Replacing the Sample Particulate Filter ............................................................................. 208
9.3.2. Rebuilding the Sample Pump............................................................................................. 209
9.3.3. Replacing the IZS Zero Air Scrubber ................................................................................. 210
9.3.4. Performing Leak Checks .................................................................................................... 211
9.3.5. Performing a Sample Flow Check...................................................................................... 213
9.3.6. Flow Calibration .................................................................................................................. 214
9.3.7. Cleaning the Absorption Tube ............................................................................................ 215
10. THEORY OF OPERATION............................................................................217
10.1. MEASUREMENT METHOD ............................................................................................................. 218
10.1.1. Calculating O
3
Concentration........................................................................................... 218
10.1.2. The Absorption Path......................................................................................................... 219
10.1.3. The Reference / Measurement Cycle .............................................................................. 220
10.1.4. Interferent Rejection ......................................................................................................... 221
10.2. PNEUMATIC OPERATION .............................................................................................................. 223
10.2.1. Sample Gas Air Flow........................................................................................................ 223
10.2.2. Critical Flow Orifice........................................................................................................... 224
10.2.3. Particulate Filter................................................................................................................ 225
10.2.4. Zero Span Gas Supply Options ....................................................................................... 225
10.3. ELECTRONIC OPERATION............................................................................................................. 226
10.3.1. Overview........................................................................................................................... 226
10.3.2. CPU................................................................................................................................... 228
10.3.3. Optical Bench................................................................................................................... 229
10.3.4. Pneumatic Sensor Board ................................................................................................. 231
10.3.5. Relay Board...................................................................................................................... 231
10.3.6. Mother Board .................................................................................................................... 233
10.3.7. Power Supply/ Circuit Breaker ......................................................................................... 236
10.4. INTERFACE .................................................................................................................................. 237
10.5. SOFTWARE OPERATION ............................................................................................................... 239
10.5.1. Adaptive Filter................................................................................................................... 240
10.5.2. Calibration - Slope and Offset.......................................................................................... 241
10.5.3. Internal Data Acquisition System (iDAS) ......................................................................... 242
11. TROUBLESHOOTING & REPAIR PROCEDURES.....................................243
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