NBN EN 13284-1 : 2002

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Sampling plane and sampling points
   5.1 General
   5.2 Sampling plane
   5.3 Minimum number and location of sampling points
   5.4 Access ports and working platform
6 Equipment and materials
   6.1 Gas velocity, temperature, pressure and composition
        measurement devices
   6.2 Sampling equipment
   6.3 Dust deposit recovery accessories
   6.4 Equipment for conditioning and weighing
7 Weighing procedure
   7.1 General aspects
   7.2 Pre-sampling conditioning
   7.3 Weighing
   7.4 Post-sampling treatment of weighed parts
   7.5 Post-sampling treatment of the rinsing solutions
   7.6 Improvement of the weighed procedure
8 Sampling procedure
   8.1 General aspects
   8.2 Preparation
   8.3 Pre measurements
   8.4 Sampling procedure
   8.5 Recovery of deposits upstream of the filter
   8.6 Overall blank sample
9 Thermal behaviour of dusts
10 Validation of results
   10.1 General
   10.2 Parameters depending on the stationery source
   10.3 Leak check
   10.4 Isokinetic rate
   10.5 Deposits of dust on non-weighed parts upstream the
        filter
   10.6 Overall blank
11 Calculation
   11.1 Sampling volumetric flow rate
   11.2 Dust concentration
12 Performance characteristics of the method
   12.1 General aspects
   12.2 Experimental data
   12.3 Comments
13 Test report
Annex A (normative) Requirements related to the working
         platform
Annex B (normative) Determination of flow direction with
         pitot tubes
      B.1 Type L Pitot tube
      B.2 Type S Pitot tube
Annex C (normative) Methods for determining the positions of
         sampling points in circular and rectangular ducts
      C.1 Method for circular ducts
          C.1.1 General
          C.1.2 General method for circular ducts
          C.1.3 Tangential method for circular ducts
      C.2 Method for rectangular ducts
Annex D (informative) Examples of suitable access ports for
        sampling equipment
Annex E (normative) Proven design of the entry nozzles
Annex F (normative) Summary of the requirements
Annex G (informative) Sampling volume, flow rate duration
      G.1 General
      G.2 Weighing uncertainties
      G.3 Sampling volume
      G.4 Sampling flow rate and duration
Annex H (informative) Examples of weighing bias
      H.1 General
      H.2 Effect of insufficient temperature equilibrium
      H.3 Effect of temperature variations
      H.4 Effect of barometric pressure variations
      H.5 Conclusions
Bibliography

Defines a reference method for measuring the low dust concentration in ducted gaseous streams in the concentration below 50 mg/m[3] standard conditions.