Trotec BM20 Manuel D'utilisation page 15

Measurement procedure
Create a solid connection between the electrodes and the material
by pushing the electrode pins X securely into the material. In the
case of wood the electrodes should be pressed in at right angles
to the grain of the wood. Repeat the measurement procedure at
a number of positions as necessary in order to achieve a higher
accuracy from the arithmetic mean of the results.
Reading off the measured values
The moisture content is given by the measured value display in the
centre of the display screen. In order that values can be read off
easily, the measured value display takes the form of bars that are
alternately continuous and subdivided.
An arrowhead at the left-hand or right-hand end of these bars cor-
responds to the exact read-off value on the dampness scale, in the
direction to which it points.
G
Bars without arrows correspond to intermediate values on the
dampness scale in question.
The read-off values on the left-hand dampness scale are used for
wood moisture measurements. The instrument records wood mois-
ture values in the range from 1 to 44 %.
The read-off values on the right-hand dampness scale are used for
building moisture measurements. The instrument records building
moisture values in the range from 0.2 to 2.4 %.
If measured values lie above the range of measurements that can be
recorded, the measured value display shows, as a warning, a large
triangle at the upper end of the bars that are displayed over the
valid range of measurements. Measured values outside the range of
measurement are not meaningful.
Operating manual – Moisture meter
B - 5