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5.1
Resistance measurements (wood)
The resistance measurement uses the needles/electrodes at the base of the instru-
ment. The meter will automatically determine the wood moisture u. This is the water
mass m
bound in the fuel and related to the absolute dry fuel mass m
w
equation (1):
Explanation:
u
= wood moisture
m
= water mass bound in the wood
w
m
= absolute dry fuel mass
B
NOTE!
According to the above equation the wood moisture may be higher than 100 %.
The wood moisture must not be confused with the water content. The water content is
the water mass related to the total mass of fuel and water (wet basis).
Explanation:
w
= water content
m
= water mass bound to wood
w
m
= absolute dry fuel mass
B
The wood moisture can be converted to the water content as follows:
Explanation:
w = water content
u = wood moisture
∙ 100%
∙ 100%
according to
B
∙ 100 %
Measuring
EN
Equation 1
Equation 2
Equation 3
51
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