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ONTENTS
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July 2000 Rosemount Analytical 556383-YModel 951A NO/NOx Analyzer
SECTION 3. STARTUP
3.1 STARTUP PROCEDURE......................................................................... 3-1
3.2 CALIBRATION......................................................................................... 3-3
3.3 MEASUREING EFFICIENCY OF NO2 TO NO CONVERTER AND
ADJUSTING TEMPERATURE SETPOINT .................................. 3-4
3.3.1 Test Setup for Measurement of Conversion Efficiency............... 3-4
3.3.2 Test Procedure........................................................................... 3-5
3.3.3 Subnormal Conversion Efficiency............................................... 3-9
3.3.4 Replacement of Converter.......................................................... 3-9
3.3.5 Capillaries................................................................................... 3-9
3.3.6 TEA Scrubber............................................................................. 3-9
SECTION 4. OPERATION
4.1 ROUTINE OPERATION............................................................................ 4-1
4.2 RECOMMENDED CALIBRATION FREQUENCY..................................... 4-1
SECTION 5. THEORY
5.1 PRINCIPLES OF OPERATION................................................................. 5-1
5.1.1 Nitric Oxide Determination by Chemiluminescence Method........ 5-1
5.1.2 NOx Determination...................................................................... 5-1
5.1.3 Ozone Generation....................................................................... 5-2
5.2 ANALYZER FLOW SYSTEM................................................................... 5-2
5.2.1 Flow of Sample or Standard Gas to Reaction Chamber.............. 5-2
5.2.2 Flow of Air or Oxygen.................................................................. 5-3
5.2.3 Flow System Operating Modes ................................................... 5-4
5.2.4 Converter Bleed Flow.................................................................. 5-5
5.3 ELECTRONIC CIRCUITRY...................................................................... 5-5
5.3.1 Amplifier Board and Associated Circuitry ................................... 5-6
5.3.2 Valve Control Board, Front Panel Mode Switch and
Associated Circuitry...................................................... 5-7
5.3.3 ±15 Volt Power Supply.............................................................. 5-8
5.3.4 High Voltage Power Supply........................................................ 5-8
5.3.5 Converter Temperature Control Board and Associated
Elements....................................................................... 5-9
5.3.6 Fan Control Circuit...................................................................... 5-10
5.3.7 Remote Operation Option........................................................... 5-10
5.3.8 Range I.D. Option....................................................................... 5-10