MI 2126 Earth 2/3
Using instrument
13
Figure 10. Two-wire test method – TT network system method
Warning:
•
Make sure that test leads are not connected to the phase line.
R
Earthtot
= R
A
+ R
O
+ R
X
R
x
Earth resistance.
R
A
Resistance of protective conductor.
R
O
Resistance of earthing electrode.
R
Earthtot
Total earth resistance of tested earthing system.
Step 2
Press the
ON/OFF
key, the following menu will be displayed:
Ω
Figure 11. Earth resistance initial menu
