Thermo Scientific 42i Instruction Manual page 13

Chapter 4
Thermo Fisher Scientific
Password Menu................................................................................. 3-86
Set Password .................................................................................. 3-86
Lock Instrument ............................................................................... 3-87
Change Password .............................................................................. 3-87
Remove Password.............................................................................. 3-87
Unlock Instrument............................................................................ 3-88
Calibration.......................................................................................................... 4-1
Equipment Required........................................................................... 4-1
Zero Gas Generator.......................................................................... 4-2
Compression ................................................................................. 4-2
Drying .......................................................................................... 4-2
Oxidation...................................................................................... 4-2
Scrubbing...................................................................................... 4-2
Gas Phase Titrator............................................................................ 4-3
Flow Controllers ........................................................................... 4-3
Pressure Regulator......................................................................... 4-3
Ozone Generator .......................................................................... 4-3
Diverter Valve ............................................................................... 4-4
Reaction Chamber ........................................................................ 4-4
Mixing Chamber........................................................................... 4-4
Output Manifold .......................................................................... 4-4
Reagents........................................................................................... 4-4
NO Concentration Standard......................................................... 4-4
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 ................................. 4-6
Pre-Calibration ................................................................................... 4-8
Calibration.......................................................................................... 4-9
Connect GPT Apparatus to the Analyzer ......................................... 4-9
Adjust Instrument Gain ................................................................. 4-10
Set Backgrounds to Zero ............................................................. 4-10
Calibrate the NO Channel to the NO Calibration Gas ............... 4-12
Calibrate the NO
Preparing NO, NO
Alternative Calibration Procedure Using NO
Calibration in Dual Range and Auto Range Mode ............................ 4-16
Set Background Readings to Zero .................................................. 4-16
Calibrate Low NO ......................................................................... 4-17
Calibrate Low NO
Calibrate Low NO
Calibrate High NO ........................................................................ 4-19
Calibrate High NO
Calibrate High NO
Channel to the NO
x x
, and NO Calibration Curves ..................... 4-13
x 2
........................................................................ 4-18
x
........................................................................ 4-18
2
....................................................................... 4-19
x
....................................................................... 4-20
2
Model 42i Trace Level Instruction Manual
Calibration Gas ............. 4-12
Permeation Tube.... 4-16
2
Contents
ix