10 EN
moisture measuring device T510
Table of wood types
The tables of wood types included in the scope of delivery contains
approx.200types of wood with their corresponding material codes.
The following tables contains all the material codes stored within the
device incl. typical examples of wood types:
Material code
H-
Wood type
examples
1 pine; pitch pine, control code
2 Cembra pine
3 Meranti, dark red
4poplar, silver, white poplar
5 birch, yellow, silver, sweet/black; wood fibre insulating
boards; cherry
6 spruce, Norway
7 chipboard urea; wenge
8 maple (sycamore), Scottish maple, acer, sugar maple;
acacia; yew; alder; ash; spruce Central Europe; chestnut,
sweet, buckeye; mahogany sapele, Philippines; Meranti,
light red; walnut; plum; pine, red; robinia, locust; elm;
Kauramin chipboard; cypress
9 larch; limba
10 Gaboon; mahogany, genuine, big-leaf, Okoumé; walnut,
American black; Padauk; plane
11 woodfibre hardboard; lime, basswood
12 Douglas fir; oak, red oak, northern red, English oak,
durmast oak; Oregon pine
13 rosewood, shisham
14 beech, common
15 pear; beech, common hornbeam, European; oak, white
oak, Arizona; buckeye, American chestnut; mecrussé
(Lebombo ironwood); olive; chipboard isocyanate; teak
16 mahogany Gaboon
17 Nargusta
18 bamboo light
19 red ironwood
20 oak, holm oak
21 ash, American ash
22 cocus wood (granadillo)
23 bamboo dark, melamine-faced chipboard
24 doussie (Afzelia)
25 iroko (African teak); kambala
26 ebony, African, black
27 cork; chipboard phenolic resin
28 (see table of wood types printed version)
29 (see table of wood types printed version)
30 (see table of wood types printed version)
31 (see table of wood types printed version)
32 (see table of wood types printed version)
33 (see table of wood types printed version)
34 (see table of wood types printed version)
35 (see table of wood types printed version)
Measuring principle
During moisture measurement according to the resistance
principle an electric measuring current is generated within the
measuring device, which is conducted through the material to
be measured by means of electrodes.
With an increasing water content of the measured material to be
examined the resistance drops and conductivity builds up.
If the material to be measured has a high resistance, the
moisture content is low.
If the material to be measured has a low resistance, the
moisture content is high.
Thus, moisture measurement according to the resistance
principle is an indirect measurement method, since the humidity
is deduced from the conductivity of the measured material.
Wood moisture measurement
Every type of wood has a distinct conductivity. In order to take
this fact into consideration for the measurement, every wood
type comes with a material code that can be set.
The wood's conductivity is further influenced by the wood
temperature. In order to take this fact into consideration for the
measurement, the wood temperature can also be determined.
The wood temperature is to be determined before moisture
measurement and set accordingly.
The measuring device comes equipped with an internal
temperature compensation. The resistance curves of the
selected wood type are automatically adapted depending on the
set wood temperature.
Error sources
During resistance measurement the accuracy of the
measurement method needs to be examined. Two fundamental
types of error sources become apparent within the measuring
range from 0 to 100M%.
• There is one error stemming from the measuring principle
of the resistance measurement. This is particularly
noticeable in case of high resistance values (low
conductivity at less than 5M%). Due to the low measuring
currents the measurement value display is i.a. increasingly
falsified by molecular attraction. Listed below are the
principle-related measurement errors:
Measured value Error
0 - 5 M% 0.8 M%
6 - 30 M% 0.2 M%
31 - 100 M% 0.1 M%
