English
27
Commissioning
The connection sequence must be respected.
Otherwise the instrument will not be able to
carry out the measurement and indicates an
error message:
• the display "Probe" indicates a connection
error of S, E (interruptions, exchange also with
H or E)
• the "Limit IM" display indicates an interruption
of the H connection.
The procedure is carried out a different loca-
tions and at respectively varying distances "a".
Thus, the composition of the soil for the de-
sired area is examined. Here, a measurement
at larger distances "a" gives more details about
the specific earth resistance in deeper grounds.
Table 1:
References to evaluate measurement results (in compliance with DIN VDE 0413 Part 7)
Type of the
earth resistance
earth resistance
ground
bar ground connection
flat ground connection
3m deep
5m deep
5m long
10m long
marshy soil/swamp
10
Ω
5
Ω
12
Ω
6
Ω
arable land/clay
33
Ω
17
Ω
40
Ω
20
Ω
humid sandy soil
66
Ω
33
Ω
80
Ω
40
Ω
dry sandy soil
330
Ω
165
Ω
400
Ω
200
Ω
stony soil
1000
Ω
500
Ω
1200
Ω
60
Ω
concrete1:5 160
Ω
80
Ω
Table 2:
required max. permissable resistance
maximum displayed test value
0,3
Ω
0,18
Ω
0,4
Ω
0,28
Ω
0,5
Ω
0.37
Ω
0,6
Ω
0,46
Ω
0,7
Ω
0,56
Ω
0,8
Ω
0,65
Ω
0,9
Ω
0,75
Ω
1,0
Ω
0,84
Ω
2,0
Ω
1,85
Ω
3,0
Ω
2,79
Ω
4,0
Ω
3,73
Ω
5,0
Ω
4,67
Ω
Example for table 2:
required max. permissable resistance 1
Ω.
maximum displayed test value on Telaris Earth 0,84
Ω.
PTDB89860000.qxd 02.03.2006 11:32 Uhr Seite 27
