<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no,scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>\nHello\n\nRecently I helped to clean an electrostatic air purifier. There is\nsomething I do not understand.\n\nIn the purifier the air first passes a set of thin wires to which 8 kV\nis connected. Then the air passes trough a set of plates. Every other\nplate is grounded and the rest is isolated. I would expect all smoke\nparticles to end up on the grounded plates but that is not the case.\nAll particles end up on the isolated plates and the grounded plates\nstay clean. Why?\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form"> View this Usenet post in original ASCII form </a></div><P></jabberwocky>Hello
Recently I helped to clean an electrostatic air purifier. There is
something I do not understand.
In the purifier the air first passes a set of thin wires to which 8 kV
is connected. Then the air passes trough a set of plates. Every other
plate is grounded and the rest is isolated. I would expect all smoke
particles to end up on the grounded plates but that is not the case.
All particles end up on the isolated plates and the grounded plates
stay clean. Why?
Doug Goncz
Aug13-04, 06:41 AM
<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no,scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>\n\n\n>From: aadg-spam@vouwbad.nl (Aad)\n\n>Message-ID: <451dc34f.0407250444.39e1b60d@posting.google.com>\n\n(snip)\n\n>All particles end up on the isolated plates and the grounded plates\n>stay clean. Why?\n\nAre you sure? It sure seems as you say:\n\n>I would expect all smoke\n>particles to end up on the grounded plates but that is not the case.\n\nHow far into the disassembly did you proceed? Was a voltmeter available? A safe\none?\n\n\nYours,\n\nDoug Goncz ( ftp://users.aol.com/DGoncz/incoming )\nStudent member SAE for one year.\nI love: Dona, Jeff, Kim, Mom, Neelix, Tasha, and Teri, alphabetically.\nI drive: A double-step Thunderbolt with 657% range.\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form"> View this Usenet post in original ASCII form </a></div><P></jabberwocky>>From: aadg-spam@vouwbad.nl (Aad)
>All particles end up on the isolated plates and the grounded plates
>stay clean. Why?
Are you sure? It sure seems as you say:
>I would expect all smoke
>particles to end up on the grounded plates but that is not the case.
How far into the disassembly did you proceed? Was a voltmeter available? A safe
one?
Yours,
Doug Goncz ( ftp://users.aol.com/DGoncz/incoming )
Student member SAE for one year.
I love: Dona, Jeff, Kim, Mom, Neelix, Tasha, and Teri, alphabetically.
I drive: A double-step Thunderbolt with 657% range.
Aad
Aug16-04, 01:55 PM
<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no,scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>\n\ndgoncz@aol.com ( Doug Goncz ) wrote in message news:<20040812194143.05745.00002951@mb-m14.aol.com>...\n\n> How far into the disassembly did you proceed? Was a voltmeter available? A safe\n> one?\nWhile it was switched on, I connected a 40M/39K voltage divider\nnetwork on the wires. I measured 7.96 volts so there must be 8kV\npositive on the wires.\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form"> View this Usenet post in original ASCII form </a></div><P></jabberwocky>dgoncz@aol.com ( Doug Goncz ) wrote in message news:<20040812194143.05745.00002951@mb-m14.aol.com>...
> How far into the disassembly did you proceed? Was a voltmeter available? A safe
> one?
While it was switched on, I connected a 40M/39K voltage divider
network on the wires. I measured 7.96 volts so there must be 8kV
positive on the wires.