NEN EN ISO 12571 : 2013

Foreword
1 Scope
2 Normative reference
3 Definitions, symbols and units
4 Principle
5 Apparatus
6 Test specimens
7 Procedure
8 Calculation and expression of results
9 Accuracy of measurement
10 Test report
Annexes
A (informative) Relative air humidities above
    saturated solutions in equilibrium
B (informative) Preparation of saturated solutions
C (informative) Example of the procedure for
    determining a point on a sorption curve
D (informative) Bibliography

Describes two alternative methods for determining hygroscopic sorption properties of porous building materials and products: a) using desiccators and weighing cups (desiccator method); and b) using a climatic chamber (climatic chamber method).