Measuring the wood moisture of logs
14
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).
𝑤 =
𝑚
𝑤
𝑚
𝐵
+ 𝑚
𝑤
∙ 100 %
Equation 2
Explanation:
w = water content
m
w
= water mass bound to wood
m
B
= absolute dry fuel mass
The wood moisture can be converted to the water content as follows:
𝑤 =
𝑢
1 + 𝑢
∙ 100%
Equation 3
Explanation:
w
= water content
u = wood moisture
6.2
Connecting the Probe
For the determination of the wood moisture it is necessary to connect two probes to the
meter :
1. Temperature probe, connection at the top of the meter, see figure 1, part 1
2. Wood Moisture Probe (Hammer Probe or Lance Probe), connection at the bot-
tom of the meter, see figure 1, part 5
CAUTION!
Before the meter is used, a visual check of the meter and the probes must ensure that
all functions work properly.
Before start measuring, check that the needles/electrodes of the Hammer Probe or
Lance Probe are not bent. If the electrodes are bent, the distance will not be 25 mm any
more, so that the measurement result may not be correct.
