Brent,
I ran measurements a couple of years ago with myself discharging into a
2-ohm ESD target. I got the same results as sited in the email. A metal
object in the hand really kicks up the initial current. The initial 300 ohm
source appeared to be the arm followed by the body as 1200 ohms. SPICE was
able to accurately model all of this. The human current rise time was faster
than what our 3 GHz oscilloscope could measure. I would like to repeat these
measurements using a 12 GHz oscilloscope.
I did build a generator that accurately mimics the human waveforms using a
bunch of leaded inductors and SMT caps and resistors.
The return path for the charge (from the floating person) must be through
displacement current.
Dave Cuthbert
Senior Test Engineer
Linear Technology, Colorado Design Center
NARTE Certified EMC Engineer, IEEE Member
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Brent DeWitt
Sent: Thursday, June 22, 2006 9:47 AM
To: Cortland Richmond; ieee pstc list
Subject: Re: 1500 ohms 100 pF gun?
I don't know about the Hish gun, but you can put that network together in a
NoiseKen ESS-2000. The cap and resistor values are independently user
changable.
Brent DeWitt
Everett, WA
>From: Cortland Richmond <72146....@compuserve.com>
>Sent: Jun 21, 2006 4:38 AM
>To: ieee pstc list <emc-p...@ieee.org>
>Subject: 1500 ohms 100 pF gun?
>
>Was looking for one for some military testing at work. I seem to recall
>that the Andy Hish ESD-255 used this network in one of its probes. Am I
>wrong?
>
>
>Cortland Richmond
>KA5S
>
>-
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