Measurement Procedure For "Ρ" Test Mode - Amprobe MultiTest 1000 Manual Del Usuario

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).
U
4. To select the distance DIST between the rods. This parameter can be set
n
DIST
from 1 to 10 meters or 3 to 30 feet.
At the end of the test the instrument
displays the values alongside.
Distance between the rods set value.
5. Press
RCL
6. Press ESC key to leave this menu confirming the settings.
ESC
START
STOP
B1 B2 B3 B4
Earth resistivity measurement
and keys to select the distance value.
a a
a
-
ρ
5
m
SE LE
a