Contents
Thermo Scientific 42iQLS Instruction Manual v
Zero Gas Generator.......................................................................... 4-2
Compression ................................................................................. 4-2
Drying .......................................................................................... 4-2
Oxidation...................................................................................... 4-2
Scrubbing...................................................................................... 4-3
Gas Phase Titrator............................................................................ 4-3
Flow Controllers ........................................................................... 4-3
Pressure Regulator......................................................................... 4-3
Ozone Generator .......................................................................... 4-4
Diverter Valve............................................................................... 4-4
Reaction Chamber ........................................................................ 4-4
Mixing Chamber........................................................................... 4-4
Output Manifold .......................................................................... 4-5
Reagents........................................................................................... 4-5
NO Concentration Standard......................................................... 4-5
Assaying a Working NO Standard Against a NIST-traceable NO
Standard........................................................................................ 4-5
Zero Air ........................................................................................ 4-6
Dynamic Parameter Specifications for Gas Titrator.......................... 4-6
Determining GPT System Flow Conditions ................................. 4-7
Pre-Calibration ................................................................................... 4-8
Calibration.......................................................................................... 4-9
Connect GPT Apparatus to the Analyzer ....................................... 4-10
Adjust Instrument Gain ................................................................. 4-10
Set NO and NOxBackgrounds to Zero....................................... 4-10
Calibrate the NO Channel to the NO Calibration Gas ............... 4-12
Calibrate the NOxChannel to the NOxCalibration Gas ............. 4-12
Preparing NO, NOx, and NO2Calibration Curves ..................... 4-13
Alternative Calibration Procedure Using NO2Permeation Tube.... 4-15
Calibration in Dual Range and Auto Range Mode............................ 4-16
Set NO and NOxBackground to Zero........................................... 4-16
Calibrate NO Low ......................................................................... 4-17
Calibrate NOx Low......................................................................... 4-17
Calibrate NO2 Low ........................................................................ 4-18
Calibrate NO High........................................................................ 4-18
Calibrate NOx High ....................................................................... 4-19
Calibrate NO2 High ....................................................................... 4-19
Zero and Span Check........................................................................ 4-20
Manual Calibration........................................................................... 4-21
Adjust NO and NOxBackgrounds................................................. 4-22
Adjust Span Coefficient.................................................................. 4-23
Reset Bkg to 0.000 and Span Coef to 1.000................................... 4-23
Zero/Span Schedule .......................................................................... 4-24
Next Time ..................................................................................... 4-24
Period ............................................................................................ 4-24
Zero/Span/Purge Duration Minutes .............................................. 4-25
