Info

Generator

Teflon Particulate Filter m—

Critical Orifice

Teflon Particulate Filter m—

Valve f

Critical Orifice a-

Sample Valve

Valve f

Sample Valve

9 Flow 0 Sensor

Micro-Processor (Digital)

I Zero/Span Valve

RS232 Computer ^ A Interface

RS232 Printer ^__

Interface

Pressure Sensor

9 Flow 0 Sensor

I Zero/Span Valve

Reaction Cell

Chopper

Micro-Processor (Digital)

RS232 Computer ^ A Interface

RS232 Printer ^__

Interface

Signal

Processing

Electronics

Exhaust Pump (external optional)

Ozone Scrubber

Range Dividers

Analog Outputs for NO, NOx, NO2

Liquid Crystal Display (LCD)

FIG. 5.12.8 System schematic of nitrogen oxides analyzer.

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