From: yaniv_vi_at_yahoo.com
Date: 2001-06-07 05:41:02
--- In buildcheapeeg_at_yahoogroups.com, yaniv_vi_at_yahoo.com wrote:
> hi
> jeorg has posted me this :
>
> The input stage of RS232EEG03analog should be safe with respect to
> iec601-1 applied parts current.
> However there could occur a problem, when the elctrode cable is
> damaged
> in a way, that the inner
> wire is shorted with the cable shield. If this occurrs on
different
> channls at the same time, current from
> the shield drivers could harm the test subject.
> This scenario should be evaluated further.
>
>
>
> sincerly yaniv
1.what the shield is connected to - is it vcm ?
there's any way to check for shoring of main pin to shield -
do some kind of a test circuit that online monitores this ?
less preferable is some way to connect beofre using the electrodes
to some internal testing device .
BTW why this phenomemn happens ?
sincerly yaniv v .
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