NEN EN 14212 : 2012 C1 2014

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
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 Selective traps for interfering agents
   7.3 Optical assembly
   7.4 Pressure measurement
   7.5 Flow rate indicator
   7.6 Sampling pump for the analyser
   7.7 Internal span source
8 Type approval of sulphur dioxide UV fluorescence 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 test
   11.2 Field operation
Annex A (normative) Calculation of lack of fit
Annex B (informative) Sampling equipment
Annex C (informative) Sampling on micro-scale [2]
Annex D (informative) Schematic diagram of a fluorescence
                      analyser
Annex E (informative) Manifold testing equipment
Annex F (normative) Type approval
Annex G (normative) Calculation of uncertainty in field
                      operation at the hourly limit value
Annex H (normative) Calculation of uncertainty in field
                      operation at the annual limit value
Bibliography

Defines a continuous measurement method for the determination of the concentration of sulphur dioxide present in ambient air based on the ultraviolet fluorescence measuring principle.