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MOISTURE CONTENT EN 13329:2006 (4.3), EN 322:1993 and EN 326-1 (adapted)

1. TOOLS
1.1 Oven: forced-convection, properly vented oven which can be maintained at 103+/2  °C for the duration of the test
1.2 Balance: the sensitivity shall be a minimum of 0.01% of the nominal oven-dry mass of the sample
1.3 Silica gel containing a dessicant, to maintain the air as close as possible to the absolutely dry condition

2. SAMPLING
Sampling and samples cutting per EN 326-1. Samples shall have a minimum initial mass of 20 g, be free from loose splinters and saw dust, and cover the whole board thickness

3. ENVIRONMENTAL CONDITIONS
3.1 Weigh the sample to an accuracy of 0.01g. This initial weighing shall be carried out immediately after sampling or where this impossible, precautions shall be taken to avoid changes n the moisture content of the test piece after sampling

3.2 Place the sample in the drying oven at a temperature of 103 (+/-2) ° C until constant mass has been reached (i.e. when the results of two successive weighing operations, carried out at an interval of 6 h, do not differ by more than 0.1% of the mass of the sample)



3.3 After the sample has been cooled to approximately room temperature in the desiccator, weigh it to an accuracy of 0.01 g, rapidly enough to avoid an increase in moisture content greater than 0.1%
3.4 Calculate the moisture content H of each test piece, as a percentage by mass to the nearest 0.1%, in accordance with the following formula:

H = ((mh – mo)/mo)*100

Where:
mh = initial mass of the sample, in g
mo = final mass of the sample, in g

4. ASSESSING TEST RESULTS
4-10%
Any single batch shall be homogeneous with Hmax – Hmin not exceeding 3%

 
  
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