Table of Contents Teledyne API T802 Paramagnetic O2 Analyzer Operation Manual
xii
12.1.1. Magnetic Properties of O2 Gas..........................................................................................................219
12.1.2. Principle of Measurement..................................................................................................................219
12.2. NDIR Measurement of CO2......................................................................................................................221
12.2.1. Operation within the T802 Analyzer.................................................................................................. 222
12.3. Pneumatic Operation................................................................................................................................222
12.3.1. Pneumatic Operation of the CO2 Sensor.......................................................................................... 223
12.4. Flow Rate Control.....................................................................................................................................224
12.4.1. Critical Flow Orifice............................................................................................................................224
12.4.2. Particulate Filter.................................................................................................................................225
12.4.3. Pneumatic Sensors........................................................................................................................... 225
12.5. Electronic Operation................................................................................................................................. 226
12.5.1. Overview............................................................................................................................................226
12.5.2. Electronic Operation of the CO2 Sensor............................................................................................227
12.5.3. Central Processing Unit (CPU)..........................................................................................................228
12.5.4. Relay Board.......................................................................................................................................229
12.5.5. Heater Control................................................................................................................................... 232
12.5.6. Motherboard...................................................................................................................................... 232
12.5.7. Front Panel Touch Screen/Display Interface.................................................................................... 235
12.5.8. Software Operation............................................................................................................................237
12.5.9. Adaptive Filter....................................................................................................................................237
12.5.10. Calibration - Slope and Offset......................................................................................................... 238
12.5.11. Temperature and Pressure Compensation..................................................................................... 238
12.5.12. Internal Data Acquisition System (DAS) .........................................................................................238
13. A PRIMER ON ELECTRO-STATIC DISCHARGE .........................................................239
13.1. How Static Charges are Created..............................................................................................................239
13.2. How Electro-Static Charges Cause Damage........................................................................................... 240
13.3. Common Myths About ESD Damage.......................................................................................................241
13.4. Basic Principles of Static Control..............................................................................................................242
13.4.1. General Rules....................................................................................................................................242
13.4.2. Basic Anti-ESD Procedures for Analyzer Repair and Maintenance..................................................244
LIST OF FIGURES
Figure 3-1: Front Panel Layout......................................................................................................... 25
Figure 3-2. Display Screen and Touch Control.................................................................................26
Figure 3-3.: Display/Touch Control Screen Mapped to Menu Charts................................................28
Figure 3-4: Rear Panel Layout..........................................................................................................29
Figure 3-5: Internal Layout................................................................................................................31
Figure 3-6: Analog In Connector.......................................................................................................33
Figure 3-7: Analog Output Connector...............................................................................................34
Figure 3-8: Current Loop Option Installed........................................................................................ 35
Figure 3-9: Status Output Connector................................................................................................37
Figure 3-10: Control Input Connector................................................................................................. 38
Figure 3-11: Concentration Alarm Relay ............................................................................................39
Figure 3-12: Default Pin Assignments, Rear Panel COM Port Connectors .......................................41
Figure 3-13. CPU Connector Pin-Outs for RS-232 Mode...................................................................42
Figure 3-14: Jumper and Cables for Multidrop Mode......................................................................... 44
Figure 3-15: RS-232-Multidrop PCA Host/Analyzer Interconnect Diagram........................................45
Figure 3-16: Pneumatic Connections–Basic Configuration–Using Bottled Span Gas....................... 48
Figure 3-17: T802 Internal Gas Flow (Basic Configuration)............................................................... 50
Figure 3-18: T802 – Internal Gas Flow with CO2 Sensor Option........................................................51
Figure 3-19: Viewing and Clearing T802 WARNING Messages........................................................ 53
07275B DCN6418