Resistance Measurements With The Wood Moisture Probe - Wohler HBF 420 Bedienungsanleitung

Amongst other factors, the following should be observed:

Depending on the type of wood, higher degrees of inaccuracy should be ex-
pected when wood moisture levels are above approx. 35 - 40 %.

The wood to be measured should have a temperature of 0°C to 30 °C.

High static charges in the material to be measured can lead to erroneous
measurements and possibly damage the meter. Suitable earthing arrange-
ments can resolve the matter.
5.1.1 Resistance measure-
ments with the wood
moisture probe
Fig. 9: Connecting the cable to the Wood
Moisture Probe
Fig. 10: Connecting the cable to the
Wöhler HBF 420
The result of the resistance measurement will be
more exact, when the wood measurement probe
is used, because the needles of the probe can be
inserted more deeply into the wood, so that hu-
midity can even be measured in the wood-inside.

Switch on the Wöhler HBF 420, select the
material code and perform the zero point cali-
bration. After that connect the meter to the
Wood Moisture Probe as follows:

Connect the two plugs of the lower part of the
cable to the jacks of the isolator of the Wöhler
Wood Moisture Probe. For the resistance
measurement it does not matter which jack is
connected to which plug.

Connect the plug at the other end of the cable
to the upper jack of the Wöhler HBF 420. Per-
form the measurement as described in chap-
ter 5.1.

The result will be shown in the display.
Measuring
EN
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