71
Troubleshooting
Symptom Cause, check, countermeasure
The resistance of auxiliary
earthing electrode does
not come down (precision
measurement).
Bad connection of measurement cable, the
ground is dry.
→Make sure that the measurement
cables are connected to the earthing
electrode/auxiliary earthing rod.
→Short-circuit the tips of the
measurement cables and then carry
out the measurement.
If the measured value is approx. 0
Ω
,
it is caused by a high earth resistance
of the earthing electrode. Insert
the auxiliary earthing rod deeper.
Alternatively, pour water over the
auxiliary earthing rod.
If the resistance
still will not come down, move the
auxiliary earthing electrode to another
location.
The measurement cables (yellow) and
(red) should be positioned approx. 10 cm
away from each other.
appears and
measurement is not allowed
(cannot measure the earth
resistance due to high earth
potential).
The earth potential exceeds the value that
can be accepted by this device. A large
leakage current may be owing into the
earthing electrode from equipment that has
been connected to the earthing electrode.
Or, the earth resistance of earthing
electrode may be high and a large earth
potential may have occurred by a small
leakage current.
→Remove the equipment that has been
connected to the earthing electrode
and then carry out the measurement.
(p. 39)
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