Fig.4 High Current Spike Resistance Warning; Fig.5 Excessive 'Noise' Warning - Megger DET5/4R Guia Del Usuario

High Current Spike Resistance (Rc)
During a test, if the resistance of the Current circuit is
too high for accurate measurement, the Rc LED
automatically illuminates, accompanied by the warning
alert indicator on the display. This may be caused by an
open circuit, poor test lead connections, or excessive
resistance of the soil near the electrode under test
and/or the remote Current spike. Whatever causes the
condition warning to appear should be cleared before a
test can be regarded as valid. Moistening the soil
around the Current spike; re-siting the spike in a new
position or using more than one spike may solve the
problem.
Fig. 4 High Current spike resistance warning
High Potential Spike Resistance (Rp)
If the resistance of the Potential circuit is too high for an
accurate measurement, the Rp LED automatically
illuminates, accompanied by the warning alert indicator
on the display. This may be caused by an open circuit,
poor test lead connections, or excessive resistance of
the soil near the electrode under test and / or the
remote Potential spike. Whatever causes the condition
warning to appear should be cleared before a test can
be regarded as valid. Moistening the soil around the
Potential spike; re-siting the spike in a new position or
using more than one spike may solve the problem.
Note that Potential spike resistance is only checked on
commencement of a test, and is not a continuous
process. To re-check Potential spike resistance, press
the appropriate push button to re-set the instrument
and commence a new test.
Excessive Noise Interference (NOISE /BRUIT)
During a test, if the interference voltage in the earth
being measured is beyond the level that can be
rejected by the Instrument, the 'NOISE' LED will
illuminate, accompanied by the warning alert indicator
on the display.
Fig. 5 Excessive 'Noise' Warning
Valid measurements cannot be made in this condition,
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