72
Troubleshooting
Symptom
Cause, check, countermeasure
Trying to carry out
measurement on a newly
built residential building, but
the simplified measurement
(two-pole method) is not
allowed.
Measurement is not allowed if the electricity
has not been distributed from the power
company.
The measured value
becomes approx. 0
Ω
when
measuring with use of an
existing auxiliary earthing
electrode for measurement.
The earthing electrode and the auxiliary
electrode for measurement may have been
connected through concrete.
→Drive an auxiliary earthing rod
into the ground and then carry out
measurement instead of using an
auxiliary electrode for measurement.
Small noise occurs
inside the device during
measurement.
It is the noise from the oscillator circuit
inside the device. It is not a failure.
The measured value is high.
It has been set to two-pole method.
→Press
Fn
button to select three-pole method.
Measurement is not allowed
when trying to measure with
an earth net laid on asphalt.
Since asphalt is insulator, measurement is
not possible with an earth net.
Auxiliary earthing rod has
been bent.
It is recommended to purchase the L9840
Auxiliary Earthing Rod. (Commercially
available pegs have sharp tips, which may
damage the carrying case.)
www.calcert.com
1.800.544.2843
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