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1.
Characteristics
In this chapter the unit density, the oven-dry method and the moisture measurement with the Micro-Electronics
moisture meters are described.
1.1 Unit density
The formula for the unit density is:
(1) Unit density
The unit density is used for moisture measurements with the FMW-B / FMW-T moisture meters.
•
For wood, the FMW-B / FMW-T are set at the average unit density applicable for a moisture
content of 0%.
•
For building materials and paper, the FMW-B / FMW-T is set at the reference line.
1.2 Moisture content
The average moisture content of a sample is determined using the oven-dry method.
•
For wood, a sample of approx. 100-200 gram is weighed and then dried at 102-105 °C, until
the mass of the sample is constant.
•
For building materials and paper, we refer to the manual for the relevant measuring
equipment.
The formula for determining the moisture content according to the oven-dry method is:
The Micro-Electronics moisture meters calculate the actual moisture content, as determined by the
oven-dry method.
1.3 CEN (European Committee for Standardization)
EN 13183-1 Round and sawn timber Method of measuring moisture content Part 1: Method for
info@tursdaletechnicalservices.co.uk
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