It is the correct ESD Association standard ESD STM4.1-1997 Worksurfaces -
Resistance Measurements, however, the information in it is primarily for a
Test Lab and evaluation of material. It specifies the number, sizes of
specimens, pre-conditioning & temperature and humidity in the environmental
chamber. However, there is a section on Periodic Worksurface Testing,
section 6.4.
Standards can be purchased from the ESD Association at www.esda.org
See http://www.esda.org/standards.html#update & ESDA Standards Activity
Update-October 2002 Meeting Series
"Workstations WG-53 has completed the writing of several sections of its
initial draft of a compliance verification document. The sections cover
test equipment, test procedures, test requirements, test frequency, and
troubleshooting." I am on this committee and we are to provide a document
providing guidance for Compliance Verification Plans.
My advice:
To save time, I recommend Testing RTG but Resistance-to-Equipment Ground
Measure the RTG resistance with a 5# electrode the worksurface furthest
from grounding point snap to equipment ground which can be to any
convenient electrical outlet. Plug AC Outlet Checker into electrical
outlet or into extension cord plugged into electrical outlet. Green light
should illuminate; if not, contact electrician to check outlet.
That is only measure RTT or RTG to the ground snap on the mat for
troubleshooting purposes. In your Compliance Verification Plan it's
important to not state that you are measuring per ESD S4.1, but rather
something like "using modified test methods in accordance with concepts
outlined in ESD 4.1."
Gene Felder
-----Original Message-----
From: Anthony York [SMTP:[log in to unmask]]
Sent: Sunday, March 02, 2003 5:01 PM
To: [log in to unmask]
Subject: Re: [TN] testing Procedures for ESD ground mats
<< File: ATT00027.htm >> Hi
Just a further question about ESD testing
Before I order the standards, can someone verify that I am correct in my
thoughts
------
ANSI/ESD S4.1-1997
will explain the methods and procedures for testing our workstations ESD
matting is functioning correctly.
-----
Regards,
Anthony L. York
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