)?
Another question - will the probe be subject to ISO17025 calibration?
Brian
-Original Message-
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of
rn...@san.rr.com
Sent: Wednesday, May 11, 2011 4:41 PM
To: 'John Woodgate'; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: UL
Hi John:
When conducting the voltage decay measurement, the measurement
is either made with, or referred to, an instrument having an input
impedance consisting of a resistance of 100 Mohms ± 5 Mohms
in parallel
with an input capacitance of 25 pF or less.
Agreed.
So any 100: 1 probe
Hi John:
For a list of commercially available 100 Mohm probes
and a discussion of the measurement, see my Technically
Speaking column in Volume 4, Number 4, December 2008,
issue of IEEE PSES The Product Safety Engineering
Newsletter.
This is available to IEEE PSES members at:
The standard says the result is referred to an instrument having an input
impedance consisting of a resistance of 100 Mohm ? 5 Mohm in parallel with
an input capacitance of 20 pF ? 5 pF
The first time that I submitted test data under the 2d ed of 60950-1, the
data review person had me submit the
In message
DD4909DB1F9A2346A6EE5A2D723D0B3218A0EEAFD4@P3PW5EX1MB13.EX1.SECURESERVER
.NET, dated Wed, 11 May 2011, jyelenc...@productsafetyinc.com
jyelenc...@productsafetyinc.com writes:
All,
If anyone has a source for the probe 100 Mohm +/- 5 Mohm in parallel
with input capacitance of 20
From: Robert F. Keller
Sent: Wednesday, April 16, 2008 8:51 AM
To All,
How would you evaluate a TNV-3 circuit ,as defined in UL
60950-1, if it is ground start? I am running into problems
with separation between TNV-3 and ground.
Bob -
There are some accommodations for this, built
On 4/16/2008, Robert Keller wrote:
How would you evaluate a TNV-3 circuit ,as defined in UL 60950-1, if it is
ground start? I am running into problems with separation between TNV-3 and
ground.
Hi Rob:
For ground start you have to use what I call the permanent ground exemption
clauses in
Brian and others interested -
CSA/UL90950-1 will be discussed in a tentatively scheduled
meeting in April at the UL60950 Standards Technical Panel,
followed by a meeting that includes the UL60950 Industry
Advisory Conference, Canadian Technical Standards Committee
and the Bi-National Working
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