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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;"><font color="black" face="Tahoma" size="2"><span style="font-size:10pt;" dir="ltr">Dear Mar,<br>
<br>
We also have an active system, and we occasionally have the same problem. Here is how we identify a shorting electrode:<br>
1. Plug all electrodes (including active electrodes) into amplifier, and place electrode tips into a cup of saline (1 tsp non-iodized salt per L filtered water).<br>
2. Remove electrodes from the cup until the system stops shorting. If the system starts shorting again when an electrode is put back in the cup, that is the shorting electrode.</span></font><br>
<font color="black" face="Tahoma" size="2"><span style="font-size:10pt;" dir="ltr"><font color="black" face="Tahoma" size="2"><span style="font-size:10pt;" dir="ltr">3. If the system is shorting with only the active electrodes in the cup, then there is a problem
with either the active electrodes or the amplifier.<br>
</span></font>4. Rinse electrodes with filtered water.<br>
<br>
Good luck,<br>
Dan Alschuler<br>
<br>
Psychophysiology Laboratory<br>
Division of Cognitive Neuroscience<br>
New York State Psychiatric Institute</span></font>
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<div style="direction: ltr;" id="divRpF991064"><font color="#000000" face="Tahoma" size="2"><b>From:</b> eeglablist-bounces@sccn.ucsd.edu [eeglablist-bounces@sccn.ucsd.edu] on behalf of Makoto Miyakoshi [mmiyakoshi@ucsd.edu]<br>
<b>Sent:</b> Friday, May 16, 2014 11:35 AM<br>
<b>To:</b> Mar Gonzalez; Tyler<br>
<b>Cc:</b> eeglablist; Birgit Nierula<br>
<b>Subject:</b> Re: [Eeglablist] How to detect which electrode is broken?<br>
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<div dir="ltr">Dear Tyler,
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<div>Have you experienced this before? If so, would you advise him please?</div>
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<div>Makoto</div>
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<div class="gmail_extra"><br>
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<div class="gmail_quote">2014-05-15 7:27 GMT-07:00 Mar Gonzalez <span dir="ltr"><<a href="mailto:margonzalezfranco@gmail.com" target="_blank">margonzalezfranco@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div dir="ltr">Dear all,
<div>We are using active electrodes and apparently one of them seems to be broken and generating a court circuit.</div>
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<div>We would like to find out which one it is. Does anyone has any tips on how to proceed?</div>
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<div>thanks</div>
<div>Mar</div>
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<div><br>
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<div>----------------------</div>
<div>Mar Gonzalez-Franco</div>
<div>PhD Student and FI-DGR fellow</div>
<div>Experimental Virtual Environments for Neuroscience and Technology Laboratory</div>
<div>Universitat de Barcelona</div>
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-- <br>
<div dir="ltr">Makoto Miyakoshi<br>
Swartz Center for Computational Neuroscience<br>
Institute for Neural Computation, University of California San Diego<br>
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