Megger Limited PWS / Nov 06
DET4TC/R Launch
17
The diagram below demonstrates the operation of ‘ART’.
The ICLAMP has the ability to measure an electrode down to 5% of the total test
current generated by the instrument. In other words the electrode measured can
have a resistance up to 20 times that of the total system and still be measured.
Values higher than 20 times cannot be measured using ‘ART’, and so you will need
to carry out a traditional 3-pole measurement. See over leaf.
Current
Ground
Electrodes
Building earth
connection/s
I Total
Ie
I
e
Ie
Ie
Ie Test > I Total
20
X
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