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Round-robin test of SIP laboratory measurements using electrical test networks

Martin, Tina LU orcid ; Zimmermann, Egon ; Klitzsch, Norbert ; Hördt, Andreas ; Huisman, Johan Alexander ; Radic, Tino and Kruschwitz, Sabine (2025) In Geophysical Journal International 242(1).
Abstract
This study presents the results of an interlaboratory test designed to evaluate the accuracy of spectral induced polarization (SIP) measurements using controlled electrical test networks.
The study, conducted in Germany since 2006, involved 12 research institutes, six different impedance measurement devices and four types of electrical test networks specifically designed to evaluate phase shift errors in SIP measurements. The test networks, with impedances ranging from 100 to 150 k , represent high-impedance samples with different phase characteristics, and pose the measurement challenges typical of such samples, including high
contact impedances and parasitic capacitances. Four key findings emerged from the study:
(1)... (More)
This study presents the results of an interlaboratory test designed to evaluate the accuracy of spectral induced polarization (SIP) measurements using controlled electrical test networks.
The study, conducted in Germany since 2006, involved 12 research institutes, six different impedance measurement devices and four types of electrical test networks specifically designed to evaluate phase shift errors in SIP measurements. The test networks, with impedances ranging from 100 to 150 k , represent high-impedance samples with different phase characteristics, and pose the measurement challenges typical of such samples, including high
contact impedances and parasitic capacitances. Four key findings emerged from the study:
(1) Impedance measurements across all devices showed deviations within 1 per cent over a wide frequency range (0.001–1000 Hz); (2) phase errors remained below 1 mrad up to 100 Hz for most devices, but increased at higher frequencies due to parasitic capacitances and electromagnetic coupling effects; (3) lab-specific instruments have lower phase errors than field instruments when used in a laboratory environment, primarily due to the effects of long cables and too low input impedances of the field instruments; and (4) short cables and driven
shielding technology effectively minimized parasitic capacitance and improved measurement accuracy. The study highlights the usefulness of test networks in assessing the accuracy of SIP measurements and raises awareness of the various factors influencing the quality of SIP data. (Less)
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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Geophysical Journal International
volume
242
issue
1
pages
13 pages
publisher
Oxford University Press
external identifiers
  • scopus:105005206275
ISSN
0956-540X
DOI
10.1093/gji/ggaf153
language
English
LU publication?
yes
id
207a45f5-8848-4802-b596-10456a2b4ee2
date added to LUP
2025-05-16 12:15:37
date last changed
2025-06-06 04:01:05
@article{207a45f5-8848-4802-b596-10456a2b4ee2,
  abstract     = {{This study presents the results of an interlaboratory test designed to evaluate the accuracy of spectral induced polarization (SIP) measurements using controlled electrical test networks. <br/>The study, conducted in Germany since 2006, involved 12 research institutes, six different impedance measurement devices and four types of electrical test networks specifically designed to evaluate phase shift errors in SIP measurements. The test networks, with impedances ranging from 100 to 150 k , represent high-impedance samples with different phase characteristics, and pose the measurement challenges typical of such samples, including high <br/>contact impedances and parasitic capacitances. Four key findings emerged from the study: <br/>(1) Impedance measurements across all devices showed deviations within 1 per cent over a wide frequency range (0.001–1000 Hz); (2) phase errors remained below 1 mrad up to 100 Hz for most devices, but increased at higher frequencies due to parasitic capacitances and electromagnetic coupling effects; (3) lab-specific instruments have lower phase errors than field instruments when used in a laboratory environment, primarily due to the effects of long cables and too low input impedances of the field instruments; and (4) short cables and driven <br/>shielding technology effectively minimized parasitic capacitance and improved measurement accuracy. The study highlights the usefulness of test networks in assessing the accuracy of SIP measurements and raises awareness of the various factors influencing the quality of SIP data.}},
  author       = {{Martin, Tina and Zimmermann, Egon and Klitzsch, Norbert and Hördt, Andreas and Huisman, Johan Alexander and Radic, Tino and Kruschwitz, Sabine}},
  issn         = {{0956-540X}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Oxford University Press}},
  series       = {{Geophysical Journal International}},
  title        = {{Round-robin test of SIP laboratory measurements using electrical test networks}},
  url          = {{http://dx.doi.org/10.1093/gji/ggaf153}},
  doi          = {{10.1093/gji/ggaf153}},
  volume       = {{242}},
  year         = {{2025}},
}