Teledyne API – Model T700 Dynamic Dilution Calibrator
xvi
10.3.5.1. A to D Conversion..................................................................................................................... 288
10.3.5.2. Sensor Inputs ............................................................................................................................288
10.3.5.3. Thermistor Interface.................................................................................................................. 288
10.3.5.4. Analog Outputs.......................................................................................................................... 288
10.3.5.5. External Digital I/O..................................................................................................................... 289
10.3.5.6. I2C Data Bus.............................................................................................................................. 289
10.3.5.7. Power-up Circuit........................................................................................................................ 289
10.3.6. Input Gas Pressure Sensor PCA...................................................................................................... 289
10.3.7. Power Supply and Circuit Breaker.................................................................................................... 290
10.4. Front Panel Touchscreen/Display Interface........................................................................................... 291
10.4.1.1. Front Panel Interface PCA ........................................................................................................291
10.5. Software Operation................................................................................................................................. 292
10.6. O3 Generator Operation.......................................................................................................................... 293
10.6.1. Principle of Photolytic O3 Generation............................................................................................... 293
10.6.2. O3 Generator – Pneumatic Operation.............................................................................................. 294
10.6.3. O3 Generator – Electronic Operation............................................................................................... 295
10.6.3.1. O3 Generator Temperature Control........................................................................................... 296
10.6.3.2. Pneumatic Sensor for the O3 Generator.................................................................................... 297
10.7. Photometer Operation............................................................................................................................ 297
10.7.1. Measurement Method....................................................................................................................... 298
10.7.1.1. Calculating O3 Concentration.................................................................................................... 298
10.7.1.2. The Measurement / Reference Cycle........................................................................................ 299
10.7.1.3. The Absorption Path.................................................................................................................. 301
10.7.1.4. Interferent Rejection.................................................................................................................. 301
10.7.2. Photometer Layout............................................................................................................................ 302
10.7.3. Photometer Pneumatic Operation.................................................................................................... 302
10.7.4. Photometer Electronic Operation...................................................................................................... 303
10.7.4.1. O3 Photometer Temperature Control ........................................................................................ 304
10.7.4.2. Pneumatic Sensors for the O3 Photometer............................................................................... 304
11. A PRIMER ON ELECTRO-STATIC DISCHARGE.......................................................... 305
11.1. How Static Charges are Created............................................................................................................ 305
11.2. How Electro-Static Charges Cause Damage......................................................................................... 306
11.3. Common Myths About ESD Damage..................................................................................................... 307
11.4. Basic Principles of Static Control............................................................................................................ 308
11.4.1. General Rules................................................................................................................................... 308
11.4.2. Basic anti-ESD Procedures for Analyzer Repair and Maintenance................................................. 310
11.4.2.1. Working at the Instrument Rack................................................................................................ 310
11.4.2.2. Working at an Anti-ESD Work Bench........................................................................................ 310
11.4.2.3. Transferring Components from Rack to Bench and Back......................................................... 311
11.4.2.4. Opening Shipments from Teledyne API’s Customer Service.................................................... 311
11.4.2.5. Packing Components for Return to Teledyne API’s Customer Service.................................... 312
06873B DCN6388