Note: this is not an ESD Association standard test method; it is SP or Standard
Practice. Information placed in the Appendix is considered "interesting" not
really binding.
Per ESD SP9.2-2003 Footwear - Foot Grounders Resistive Characterization (not to
include static control shoes)
"APPENDIX B - Foot Grounder Usage Guidance
Compliance verification should be performed prior to each use (daily, shift
change, etc.). The accumulation of insulative materials on the FCS [Floor
Contacting Surface] may increase the foot grounder system resistance. If foot
grounders are worn outside the ESD protected area testing for functionality
before reentry to the ESD protected area should be considered."
Gene Felder
[log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kane, Joseph E (US SSA)
Sent: Tuesday, March 07, 2006 3:06 PM
To: [log in to unmask]
Subject: [TN] ESD Heel Strap Testing
I'm trying to get an idea about industry practice, how often
heel strap testing is performed.
An outside auditor has questioned our practice of testing
heel straps just once a day. Operators wear a strap on each
foot, and test each individually. We require operators to remove
the straps if they leave the building, but we don't require
them to retest when they put them back on, and there lies
the objection.
Our position is that the primary purpose of testing is to verify the
integrity of the equipment, to make sure that the straps
haven't worn out. It does matter how the straps are put on,
but in our experience, operators usually get it right, and we don't
see a lot of failures when footwear is tested. Of course, most of our
people wear conductive shoes, not heel straps.
We operate to MIL-STD-1686 and ESD S20.20, which do
not speak to this issue, so what we have is a difference of opinion.
I've seen shops that require testing every time a heel strap
or wrist strap is put on, and this is certainly defensible. But
I think there should also be some tolerance for considerations of
practicality and general effectiveness of the ESD program.
Any comments?
Joe Kane
BAE Systems
Johnson City, NY
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