NOVA AND NOVA PRO
Measurements
49
5.8.2.
Specific earth resistance (Ro only NOVA PRO)
It is advisable to measure Earth Resistivity, when defining parameters of earthing system (required
length and surface of earth electrodes, most appropriate depth of installing earthing system etc.) in
order to reach more accurate calculations.
How to perform Specific Earth Resistance measurement
Step 1
Select the
Earth Resistance
function with the function selector FCT key and select
the
Ro
mode with the
▲▼ and ◀▶navigation
keys. The following menu will be
displayed:
Figure 5-50: Specific Earth Resistance (Ro) measurement menu
Step 2
Set the following limit value:
•
Distance:
set distance “a” between test rods using the ▲▼ and
◀▶
navigation keys.
Step 3
Follow the connection diagram shown in figures 5.51 to perform the
Specific Earth
Resistance
measurement.
Figure 5-51: Connection diagram
