5.7.15 Service Procedures ........................................................................................................................132
5.8 Frequently Asked Questions .....................................................................................................................137
5.9 Technical Assistance .................................................................................................................................138
6. Theory of Operation ................................................................................................................ 139
6.1 Measurement Method ................................................................................................................................139
6.1.4 Interferent Rejection .......................................................................................................................143
6.1.4.2 Mercury Vapor .................................................................................................................143
6.2 Pneumatic Operation .................................................................................................................................143
6.2.1 Sample Gas Air Flow .....................................................................................................................144
6.2.2 Flow Rate Control ..........................................................................................................................144
6.2.3 Particulate Filter .............................................................................................................................145
6.2.4 Pneumatic Sensors ........................................................................................................................146
6.2.4.2 Sample Flow Sensor .......................................................................................................146
6.3 Electronic Operation ..................................................................................................................................146
6.3.1 CPU ................................................................................................................................................148
6.3.1.2 Flash Chip .......................................................................................................................148
6.3.2 Motherboard ...................................................................................................................................149
6.3.2.1 A to D Conversion ...........................................................................................................149
6.3.2.2 Sensor Inputs ..................................................................................................................149
6.3.2.4 Analog Outputs ................................................................................................................150
6.3.2.6 Power up Circuit ..............................................................................................................150
C Data Bus ....................................................................................................................151
2
6.3.3 Relay Board ...................................................................................................................................151
6.3.3.1 Status LEDs .....................................................................................................................152
C Watch Dog Circuitry ...................................................................................................153
2
6.3.3.3 Heater Control .................................................................................................................153
6.3.3.4 Valve Control ...................................................................................................................154
6.3.5 AC Power Configuration .................................................................................................................157
083730400A DCN8130
Generator ............................................................................132
3
Scrubber .......................................................................................133
3
Concentration .........................................................................................................140
3
Teledyne API - Model T400 O
Analyzer
3
xi