MI 3102(H) BT
Eurotest
XE
Measurements
56
5.8
Earth resistance
Earth resistance is one of the most important parameters for protection against electric shock.
Main earthing arrangements, lightning systems, local earthings, soil resistivity, etc can be
verified with the earthing resistance test. The measurement conforms to the EN 61557-5
standard.
The Earth resistance main function is divided into three sub-functions:
3-wire earth resistance test RE for standard earth resistance tests with two earthing
rods.
Contactless earth resistance test with two current clamps (also recommended in IEC
60364-6 for urban areas), for measuring resistance to earth of individual earthing rods.
Specific earth resistance.
selection for instructions on
key functionality.
Figure 5.35: Earth resistance
Test parameters for earth resistance measurement
Test
Test configuration
[EARTH RE, two clamps,
]
Limit
Maximum resistance
[OFF, 1
÷ 5 k
]
Distance
In
sub-function only:
Distance between probes
[0.1 m ÷ 30.0 m] or [1 ft ÷ 100 ft]
Earth resistance measurements, common measurement procedure
Select
EARTH
function using the function selector keys.
Set sub-function to
EARTH RE
or
EARTH 2 CLAMPS
using
UP / DOWN
keys.
Enable and set
limit
value (optional).
Connect
test leads to the instrument.
Connect
Figure 5.36, Figure 5.37 and Figure 5.39
Press the
TEST
key to perform the measurement.
Store
the result by pressing the
MEM
key (optional).
