Benning IT 130 - Page 53

BENNING IT 130 Measurements
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Figure 5.34: Connection of the optional earthing kit (044113)
– Measurement at the lightning arrester
Figure 5.35: Example of an earthing resistance measurement
Results displayed:
R .............. earthing resistance
Rp ............ resistance of the S probe, probe resistance (potential)
Rc ............ resistance of the H probe, auxiliary earth electrode resistance (current)
Notes:
 An excessive resistance of the S and H probes might influence the measuring results. In
this case, the warnings “Rp” and “Rc” will be displayed. The results will not be evaluated
with "PASS" / "FAIL".
 High parasitic currents and interference voltages might influence the measuring results.
In this case, the tester displays the warning.
 The probes must be positioned with sufficient distance from the test object. The distance
between the earth connection (E/ES) and the probe (H) should be at least five times
larger than the depth or length of the earth connection (see figures 5.33 and 5.34).