The depth of investigation depends on the distance between the current electrodes.
2.
Welding aluminum, for example, would usually require direct-current electrode positive ( DCEP ).
3.
Welding steel would require direct-current electrode negative ( DCEN ).
4.
Current electrode arrays, he said, can be jarred out of place and lose the signal.
5.
This voltage is cancelled out by injecting current, using two other current electrodes placed away from the epithelium.
6.
In order to obtain the apparent resistivity as the function of depth, the measurements for each position are performed with several different distances between current electrodes.
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