English to Russian Tech/Engineering Electronics / Elect Eng moisture measurement

The electrometric method is mainly divided into DC resistance type (probe type) and AC dielectric type (inductive type). In the probe type, a probe is inserted into the inner layer of the timber to measure the resistance between the two electrodes within the measurement range of 2-70%. among the influential factors are: tree type, texture direction, temperature and insertion depth. Normally, the displayed figure is smaller in the horizontal direction than in the texture direction, latter being taken as the basis in most cases. The density of the tree type does not influence moisture content to a great extent. For instance, Chinese fir (a softwood) and oak (a hardwood) differ greatly with respect to density, but equilibrium moisture contents are about the same. Inductive type meter is the AC dielectric type meter. Such meters adopt TABULAR ELECTRODES or PUNCH ELECTRODES. During measurement, the polar plate clings to the timber surface. Such meters allow quick and each operation, but their measurement accuracy is not as good as that of probe type.