"Cordless" Wrist Strap do not remove electrostatic charges effectively and
do not meet the minimum recommended technical requirements of ANSI/ESD
S20.20.
Here's information from a company selling wireless wrist straps:
"In effect, the wireless wrist strap slowly neutralizes static electricity
on a human body and maintains the potential of a human body below 500V,
which is a great improvement from 3 to 5 kV measured without the wrist
strap.
The wireless wrist strap is not intended to replace conventional wrist
straps. However, a wireless wrist strap, supplied with an additional coil
cord for direct grounding, not only replaces conventional wrist straps, but
provides additional protection when a person using it has to move away from
the hard wired grounding point, (which is often a case in the electronics
assembly, kiting, stock room, inspection, service or development working
environments).
Source: http://www.bomir.com/online/zerocharge/ground/wireless.htm
Practical Points, Benefits and Precautions:
* Please, do not touch electronics components immediately after installing
the wireless wrist strap on your wrist. Allow minimum 60 seconds for the
wrist strap to neutralize high levels of static electricity already
existing on your body.
* Do not use wireless wrist straps as your primary grounding device (unless
it is a 2 in 1, Model AML-301A and is used with the grounding cord)."
Source: www.bomir.com/online/zerocharge/ground/wireless.htm
Gene Felder
[log in to unmask]
-----Original Message-----
From: Jason W. Gregory [SMTP:[log in to unmask]]
Sent: Thursday, October 09, 2003 9:37 AM
To: [log in to unmask]
Subject: Re: [TN] Question on a Wrist Strap
I don't trust them and wouldn't allow them in my area.
Jason Gregory
SMT Production Supervisor/
Integrated Product Team Leader
LaBarge Inc.
(918)459-2367
(918)459-2221 fax
[log in to unmask]
http://www.labarge.com
Rich Lasko
<RSL@BEIWISCONSIN To: [log in to unmask]
.COM> cc:
Sent by: TechNet Subject: [TN] Question on a
Wrist Strap
<[log in to unmask]>
10/09/2003 11:31
AM
Please respond to
"TechNet E-Mail
Forum."; Please
respond to Rich
Lasko
Hello everyone,
I was asked a question this AM that I do not know the answer to and I was
hoping to get some of your thoughts. One of my employees brought in a
"Cordless" Antistatic Wrist Strap made by Botech. I guess the theory
behind it works on the Corona principle???? I'm not familiar with that
principle. Has anyone had any experience with this type of wrist strap?
Is it effective? How do you test it to verify its' effectiveness?
It would appear to me that this would not be effective or appropriate due
to the fact that everything else in the ESD protected work area is grounded
to a different potential (in our case electrical ground).
Any feedback would be appreciated.
Thanks in advance.
Rich Lasko
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