Hi Sandy -- KeyTek built many of the crossed vane testers used by IBM and their suppliers. Older units (pre 1980's) were built by another company -- don't remember who.
The crossed vane tester produces a ringing waveform which more closely resembles the kind of waves you would see from a furniture ESD event - one large charged metal object bumping into a product (computer mainframe). The current peaks are much higher than from human ESD. The vanes themselves are radiators -- they radiate like an antenna when the field collapses, and this is, in fact, part of the ESD test. It's been a while, but as I remember, there were two modes of operation: 1) discharge probe is placed in direct contact to metal on the unit under test. ESD current injection and radiation from the vanes takes place. 2) discharge probe is placed in direct contact with the ground below the vanes. This is a radiated test only (each time a discharge is made to ground, the vanes radiate. The other thing I remember from being around these units is that they radiate quite a strong field -- we took down an HP mainframe computer located in an adjacent room during the days when we were developing this unit. Injected currents are quite high -- I could dig out some old literature if you're interested. Hope this is helpful. Michael Hopkins KeyTek mhopk...@keytek.com -----Original Message----- From: Sandy Mazzola [mailto:mazzo...@symbol.com] Sent: Monday, December 18, 2000 7:13 PM To: emc-p...@ieee.org Subject: Crossed Vane ESD Simulator To all, I am looking for information on a Crossed Vane ESD simulator. Specifically looking for what the vanes are for and how they affect the results and is the position of the ESD simulator probe significant, should it be on the edge of the table or near the unit. Any information on Crossed Vane ESD Simulators would be appreciated. Thanx a lot Have a great day Sandy Mazzola Regulatory Engineer Symbol Technologies Inc 1 Symbol PLaza Holtsville, N.Y 11742-1300 Phone (631) 738-5373 Fax (631) 738-3318 or (631) 738-3915 E-mail: mazzo...@symbol.com ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson: pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson: pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
