Fluke 1625 FE 1625 Users Manual - Page 84

Soil Resistivity PE, The soil resistivity significantly depends on the specific kind of material farm

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1625 Users Manual Soil Resistivity ρE The soil resistivity is the resistance measured between two opposing surfaces of a cube of homogenous soil material with a lateral length of 1 meter. The unit is Ωm (see picture) A = 1 m2 p = A . R( m) EL L=1 m edw054.eps The soil resistivity significantly depends on the specific kind of material (farming soil, dry sand, moist sand, concrete, gravel etc.), but also depends on seasonal changes. Dry soil has a higher resistivity than moist soil and frozen ground has a higher resistivity than dry, warm sand (see picture). The two examples below show the change of resistivity during the course of one year. 76

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1625
Users Manual
76
Soil Resistivity
ρ
E
The soil resistivity is the resistance measured between two opposing surfaces
of a cube of homogenous soil material with a lateral length of 1 meter. The unit
is
Ω
m (see picture)
A = 1 m
2
p =
E
A
L
.
R
(
m
)
L=1 m
edw054.eps
The soil resistivity significantly depends on the specific kind of material (farm-
ing soil, dry sand, moist sand, concrete, gravel etc.), but also depends on sea-
sonal changes. Dry soil has a higher resistivity than moist soil and frozen
ground has a higher resistivity than dry, warm sand (see picture).
The two examples below show the change of resistivity during the course of
one year.