03/312903 DC : DRAFT SEP 2003

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
    4.1 General
    4.2 Measuring principle
5 Description of measuring equipment - Sampling and
    sample gas conditioning systems
    5.1 General
    5.2 Sampling line components
         5.2.1 Sampling probe
         5.2.2 Filter
         5.2.3 Sampling line
         5.2.4 Sample cooler (configuration 1)
         5.2.5 Permeation drier (configuration 2)
         5.2.6 Dilution system (configuration 3)
         5.2.7 Heated line and heated analyser
                (configuration 4)
         5.2.8 Sample pump
         5.2.9 Secondary filter
         5.2.10 Flow controller and flow meter
6 Analyser equipment
    6.1 General
    6.2 Converter
    6.3 Ozone generator
    6.4 Reaction chamber
    6.5 Optical filter
    6.6 Photomultiplier tube
    6.7 Ozone removal device
    6.8 Reagents
         6.8.1 Oxygen
         6.8.2 Zero gas
         6.8.3 Span gases
7 Determination of the characteristics of the method:
    analyser, sampling and conditioning line
    7.1 Introduction
    7.2 Relevant performance characteristics of the
         method and performance criteria
    7.3 Establishment of the uncertainty budget
8 Field operation
    8.1 Sampling location
    8.2 Sampling point
    8.3 Choice of the suitable instrument and sampling
         line
    8.4 Setting of the analyser on site
         8.4.1 Preliminary zero and span check, and
                adjustments
         8.4.2 Zero and span checks after measurement
9 Ongoing quality control
    9.1 Introduction
    9.2 Frequency of checks
10 Expression of results
11 Evaluation of the method in the field
    11.1 General
    11.2 Repeatability and reproducibility in the field
    11.3 Experimental data
    11.4 Equivalency with an alternative method
12 Test report
Annex A (informative) Schematic diagrams of typical
                      analysers
Annex B (normative) Determination of converter efficiency
    B.1 First method: cylinder gases for calibration
    B.2 Second method: gaseous phase titration
Annex C (informative) Examples of different types of
                      converters
    C.1 Quartz converter
    C.2 Low temperature converter (molybdenum)
    C.3 Stainless steel converter
Annex D (informative) Procedures for determination of the
                      performance characteristics during
                      the laboratory test
    D.1 General test conditions
    D.2 Procedures
         D.2.1 Response time
         D.2.2 Detection limit
         D.2.3 Lack of fit
         D.2.4 Zero drift and span drift
         D.2.5 Sensitivity to influence quantities
         D.2.6 Sensitivity to interferents
         D.2.7 Repeatability at zero and at span level
         D.2.8 Correction to dry basis
         D.2.9 Correction to O[2] reference concentration
Annex E (informative) Example of assessment of compliance
                      of chemiluminescence method for NOx
                      with requirements on emission
                      measurements
    E.1 Specific conditions in the site
    E.2 Performance characteristics of the method
    E.3 Calculation of standard uncertainty of
         concentration values given by the analyser
         E.3.1 Model equation and application of rule of
                uncertainty propagation
         E.3.2 Results of uncertainty calculation
    E.4 Conversion in mg/m[3](n)
    E.5 Evaluation of the compliance with the required
         measurement quality
Annex F (informative) Evaluation of the method in the field
    F.1 Characteristics of installations
    F.2 Overview results
Annex G (informative) Leak test procedures
    G.1 Method A
    G.2 Method B
Annex H (informative) Relationship with EU Directives
Bibliography

EN 14792.