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Short note on electrode charge‐up effects in DC resistivity data acquisition using multi‐electrode arrays
Author(s) -
Dahlin Torleif
Publication year - 2000
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1046/j.1365-2478.2000.00172.x
Subject(s) - electrode , electrical resistivity and conductivity , current (fluid) , materials science , signal (programming language) , charge (physics) , electrode array , analytical chemistry (journal) , optoelectronics , electrical engineering , chemistry , physics , computer science , engineering , quantum mechanics , chromatography , programming language
The measurement sequence used in DC resistivity data using multi‐electrode arrays should be carefully designed so as to minimize the effects of electrode charge‐up effects. These effects can be some orders of magnitude larger than the induced signal and remain at significant levels for tens of minutes. Even when using a plus‐minus‐plus type of measurement cycle, one should avoid making potential measurements with an electrode that has just been used to inject current, as the decay immediately after current turn‐off is clearly non‐linear.