NEN EN 14034-4 : 2004 + A1 2011

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Test apparatus
   4.1 General
   4.2 Explosion vessel
   4.3 Dust dispersion system (dust container, fast
       acting valve, connecting tube, dust disperser)
   4.4 Ignition source
   4.5 Control unit
   4.6 Pressure measuring system
   4.7 Oxygen measuring system
   4.8 System to create the inert gas/air-mixture
5 Dust sample
6 Test procedure
7 Calibration and verification
   7.1 Calibration
   7.2 Verification
8 Safety precautions/instructions for use
9 Alternative test equipment/procedures
10 Test report
Annex A (normative) Electro pneumatic valve
Annex B (normative) Dust disperser with 5 mm holes
Annex C (normative) 20 l sphere
  C.1 General
  C.2 Test apparatus
  C.3 Test conditions
  C.4 System to create the inert gas/air-mixture
  C.5 Test procedure
Annex D (informative) Examples of procedures to determine
        the LOC
Annex ZA (informative) Relationship between this European
         Standard and the Essential Requirements of EU
         Directive 94/9
Bibliography

Explains a test method for the determination of the limiting oxygen concentration of dust clouds in a closed vessel under defined initial conditions of pressure and temperature.