Amprobe Multitest-1000 Continuity-Tester - Manual (Page 39)

4.4.3. Measurement procedure for " ρ" test mode
The earth resistivity is a very useful measurement. Its’ value can help a designer correctly
size the earth rods in an earth plant.
The measurement is taken according to what is prescribed for CEI 64.8, IEC 781, VDE
0413, EN61557-5
1. Select "
ρ" earth measurement mode using the F1 key.
2. Connect the Black, Red, Green and Blue cables to the corresponding input terminals of the
instrument T1, T2, T3, T4 (see possible connections in the following picture).
3. Connect the cables to the auxiliary rods (see connections in the following picture).
B2 B3 B4 B1
a
a
a a
Earth resistivity measurement
4.
To select the distance DIST between the rods. This parameter can be set
from 1 to 10 meters or 3 to 30 feet.
U
n
DIST
) - ρ
5
m
SE LE
At the end of the test the instrument
displays the values alongside.
Distance between the rods set value.
5.
Press and keys to select the distance value.
6. Press
ESC key to leave this menu confirming the settings.
RCL
ESC
START
STOP