At Desco www.desco.com Foot Grounders are under personal grounding at
http://www.desco.com/catalog/p_pgrnd.htm
Not enough people bought our shin straps so they are no longer in the line.
When they were removed the length of the grounding tab was increased to
30" so people could use in boots, etc.
Per ANSI/ESD S20.20 Table 1 when personal grounding is via Flooring -
Footwear System resistance recommended to be <3.5 x 10E7ohms per ESD STM
97.1 Floor Materials and Footwear-Resistance Measurement in Combination
with a Person or charge <100 volts per ESD STM 97.2 Floor Materials and
Footwear-Voltage Measurement in Combination with a Person
Note: cordless wrist straps do not provide effective ESD control; see
Evaluation of Wireless Wrist Straps by ESD Journal Lab at
http://www.esdjournal.com/techpapr/sfowler/wireless.htm
Consider us a source for ESD control information; we can be your ESD staff.
Just email issues to [log in to unmask]
Gene Felder
[log in to unmask]
-----Original Message-----
From: Alain Savard [SMTP:[log in to unmask]]
Sent: Thursday, June 06, 2002 4:44 AM
To: [log in to unmask]
Subject: Re: [TN] ESD heel straps
Hi Hans,
The low reliability straps that they were talking about previously were the
cordless wrist straps that work through coronal discharge. Heel straps
should be Ok when you have to walk with the board for a short distance, if
the floor is properly grounded (Conductive wax, floor mats...). Wrist
straps
are still recommended here for most of the work. There are also some shoes
that help with ESD dissipation, instead of the heel strap. Wonder if they
make these in cowboy boots format?
Alain Savard
QA - PCB
CAE Inc.
-----Original Message-----
From: Hinners Hans M Civ WRALC/LUGE [mailto:[log in to unmask]]
Sent: June 5, 2002 4:27 PM
To: [log in to unmask]
Subject: Re: [TN] ESD heel straps
Hey Graham,
You might want to check the archives - I thought folks said those things
don't work for every situation (or just as good as those pesky cell phone
antennas). I had a heck of a time getting our assembly folks to wear their
ESD coats - unless they were Hunter's camouflage, with their name
embroidered over the pocket. Then I still had one worker tell me she
couldn't wear anything more than the silk and synthetic blouse - too warm
blooded.
Hans in Muggy Middle GA
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hans M. Hinners
Electronics Engineer
Warner Robins - Air Logistics Center (WR-ALC/LUGE)
226 Cochran Street
Robins AFB GA 31098-1622
mailto:[log in to unmask]
Com: (478) 926 - 5224
Fax: (478) 926 - 4911
DSN Prefix: 468
-----Original Message-----
From: Graham Collins [mailto:[log in to unmask]]
Sent: Wednesday, June 05, 2002 2:54 PM
To: [log in to unmask]
Subject: [TN] ESD heel straps
Good day TechNet!
A simple but important to me question for any southern Technetters: Is
there such as thing as a strap-on ESD heel strap that will work with cowboy
boots?
No, I am not kidding. Seriously. We have an operator who has back
problems
that "go away" if the boots are worn. Not going to argue the point, I just
would like said operator properly gounded... then we can all be happy.
We use the standard strap on heel straps on our grounded floor, but they
are
obviously not designed for a high cut boot.
regards
Graham Collins
Process Engineer,
Northrop Grumman
Atlantic Facility of Litton Systems Canada
(902) 873-2000 ext 6215
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