NEN EN 14626 : 2012

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Principle
   5.1 General
   5.2 Measuring principle
   5.3 Type approval test
   5.4 Field operation and quality control
6 Sampling equipment
   6.1 General
   6.2 Sampling location
   6.3 Sample inlet and sampling line
   6.4 Particulate filter
   6.5 Control and regulation of sample flow rate
   6.6 Sampling pump for the manifold
7 Analyser equipment
   7.1 General
   7.2 Interferences due to infrared absorbing gases
   7.3 Details about analyser equipment
   7.4 Pressure measurement
   7.5 Flow rate indicator
   7.6 Sampling pump for the analyser
8 Type approval of CO-NDIR analysers
   8.1 General
   8.2 Relevant performance characteristics and performance
        criteria
   8.3 Design changes
   8.4 Procedures for determination of the performance
        characteristics during the laboratory test
   8.5 Determination of the performance characteristics during
        the field test
   8.6 Expanded uncertainty calculation for type approval
9 Field operation and ongoing quality control
   9.1 General
   9.2 Suitability evaluation
   9.3 Initial installation
   9.4 Ongoing quality control
   9.5 Calibration of the analyser
   9.6 Checks
   9.7 Maintenance
   9.8 Data handling and data reports
10 Expression of results
11 Test reports and documentation
   11.1 Type approval tests
   11.2 Field operation
Annex A (normative) Test of lack of fit
Annex B (informative) Sampling equipment
Annex C (informative) Sampling on micro scale
Annex D (informative) Schematics of non-dispersive infrared
                      spectrometer
Annex E (informative) Manifold testing equipment
Annex F (normative) Type approval
Annex G (normative) Calculation of uncertainty in field
                      operation at the 8-hour mean limit value
Bibliography

Defines a continuous measurement method for the determination of the concentration of carbon monoxide present in ambient air based on the non-dispersive infrared spectroscopic measuring principle.