Unitest 8986 Mode D'emploi page 27

Table 6.3.1:
References to evaluate measurement results (in compliance with DIN VDE 0413 Part 7)
State of the
ground
marshy soil/swamp
arable land/clay
humid sandy soil
dry sandy soil
stony soil
concrete1:5
required max. permissable resistance
0,3 Ω
0,4 Ω
0,5 Ω
0,6 Ω
0,7 Ω
0,8 Ω
0,9 Ω
1,0 Ω
2,0 Ω
3,0 Ω
4,0 Ω
5,0 Ω
For a required earth resistance as shown in Table 6.3.1, the measured value must not exeed the values in the
table below taking into account instrument error.
earth resistance
bar ground connection
3m deep 5m deep
10 Ω 5 Ω
33 Ω 17 Ω
66 Ω 33 Ω
330 Ω 165 Ω
1000 Ω 500 Ω
maximum displayed test value
0,18 Ω
0,28 Ω
0.37 Ω
0,46 Ω
0,56 Ω
0,65 Ω
0,75 Ω
0,84 Ω
1,85 Ω
2,79 Ω
3,73 Ω
4,67 Ω
earth resistance
flat ground connection
5m long 10m long
12 Ω 6 Ω
40 Ω 20 Ω
80 Ω 40 Ω
400 Ω 200 Ω
1200 Ω 60 Ω
160 Ω 80 Ω
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