Amprobe Multitest-1000 Continuity-Tester Manuel d'utilisateur télécharger pdf (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 B4B1

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.

DIST

)

-ρ

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

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Amprobe Multitest-1000 Continuity-Tester Manuel d'utilisateur Page 39