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Table of Contents Teledyne API T802 Paramagnetic O
2
Analyzer Operation Manual
xii
12.1.1. Magnetic Properties of O
2
Gas..........................................................................................................219
12.1.2. Principle of Measurement..................................................................................................................219
12.2. NDIR Measurement of CO
2
......................................................................................................................221
12.2.1. Operation within the T802 Analyzer ..................................................................................................222
12.3. Pneumatic Operation................................................................................................................................222
12.3.1. Pneumatic Operation of the CO
2
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 CO
2
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 CO
2
Sensor Option........................................................ 51
Figure 3-19: Viewing and Clearing T802 WARNING Messages ........................................................ 53
07275B DCN6418