Hellow Group
I am looking for a contact within the EMC department at HP Laser Printer.
Please reply to my personal email account.
Thanks,
Tommy.
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Well, this has been rather informative, but
the CB scheme as I understand it is specific
about exactly what test data is involved.
Right now, it's mainly safety related
testing, no?
In other words, you could be testing a product
in country A who participates in the CB Scheme.
The tests
Hello Group,
I read about the new requirements for Argentine Approvals in International
Product Safety News, July-August 1998.
I received a call from our dealer there yesterday. He assumed that our
products are certified by a recognised company but he urgently needed me
to fax the certificates
I have never conclusively figured this out either. Based on my
understanding, NRTL acceptance is an option for the U.S. in general,
but by far the easiest row to how. For example, to satisfy OSHA
workplace requirements, equipment can be built to the many pages of
requirements, or simply meet 29
The CB Scheme is a standard set of tests to IEC 950
(now IEC 60950) requirements. It does not include
emissions, immunity, and telephone requirements
beyond IEC 60950. For example, the Nordic countries
used to require both safety and EMC data for approval
to use their marks. As a result of the
Hello George Doug,
The CB Scheme, providing for the mutual acceptance of electrical safety
test data, among 30+ countries, covers 14+ product categories and is
certainly not limited to ITE.
An extension of the CB Scheme to provide for the mutual acceptance of EMC
test data has been in effect
This discussion thread has reminded me of my old EE 101? class
some 40 years ago. The textbook was Transformation Calculus and
Electrical Transients published by Prentice-Hall in 1949 and last
edited in 1955. Chapter 3 describes the British engineer Oliver
Heaviside who developed the now famous
George, do we really have a choice? What electrical inspector or OSHA
inspector is going to take on the personal responsibility of reviewing reams
of design and test data and pronounce compliance? Yes, they can, but why
should they?
--
From:
Hello Muriel,
Are you familiar with CISPR 16 ?? The diagram is presented in this standard
including multiple variations for high current and/or phases.
Basically it consists of a series inductor to create a high impedance mains,
with 1 shunt resistors of 50 Ohms per phase to earth.
The equipment
Yes Douglas, CB scheme is only related to Safety and has nothing to do with
EMC and Telecom. --Barry Ma.
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Original Text
From: Douglas Mckean dmck...@corp.auspex.com, on 9/15/98 5:36 PM:
Well, this has been rather informative, but
the CB scheme as I understand it is specific
about
All,
I am having difficulty finding Reed Switch manufacturers that have a
European Safety certification. ( TUV, VDE, etc. )
Most manufacturers have a UL and CSA certification with a 100k cycle
testing time.
The application I have for this switch is
Couldn't talk about Safety...but there are no EMC requirements for
Argentina that I am aware of.
Bob H.
(Embedded
image moved s_doug...@ecrm.com (Scott
Does EN 60601-1-2:1993 cover EMC for implantable medical devices such as
pacemakers?
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Hello from San Diego:
Ron Pickard asks:
... what specific requirements are there that positively
and unequivicably require NRTL Listing...
To my knowledge, there are two, independent sets of regulations
that require third-party safety certification:
1) OSHA (safety of electrical
Muriel and Gert:
It's not so difficult to build your own LISN. Just build conservatively and
solidly. Definitively use an air core inductor. Here's a few design starting
points for a 50uH single layer, (solenoid wound), constant winding pitch
inductor rated for 20 amps (using #12 solid copper
Rich,
I must differ with you on one point below. Refer to
29 CFR 1910.399 (a)(ii). This is the section just past
the reference to NRTL acceptance cited below.
In so many words, paragraph (ii) says that if the equipment
is not approved etc. by an NRTL, then it must be inspected
etc by a
On Wed, 16 Sep 1998 13:59:24 -0400, you wrote:
Does EN 60601-1-2:1993 cover EMC for implantable medical devices such as
pacemakers?
I don't see it mentioned, although there is an IEC standard that covers them:
IEC 60601-2-10 (1987-12) Medical electrical equipment. Part 2: Particular
requirements
Hi George:
I stand corrected. You can indeed bypass the NRTL if
you can find a local occupational safety authority to
pass on the product's safety.
As a general rule, this is quite difficult to implement
(i.e., to find an authority who is qualified and willing
to investigate the details of
Hello all
The construction of the coil is the most difficult bit of constructing a
LISN. Canadian Standards produced a document describing an exact
physical construction - and I tried it and my first LISN was within 3db
of a calibrated HP LISN - not bad for a first attempt! The other
important
To all that are fairly intimate with US safety requirements,
Here are some curiosity questions that have been nagging at me for a while:
Other than what can be found in the National Electric Code (Article 800-4, I
believe), the 1910 OSHA regulations and virtually all municipality electric
Ron, you can break down the requirements into two areas: the consumer market
and the business market. As you have already noted, OSHA regulations governs
the business market. So, all ITE in the work place must be Listed. There are
also some special additional requirements in the earthquake belt
To muddy the waters further, Ron, I offer a converse reminder: many
Authorities Having Jurisdiction are still using versions of the NEC the
precede the introduction of 800-4 (and the previous location of the same
idea in the 1990 NEC that eludes me). I've known of some jurisdictions to
use the
Thanks to all who have responded to this query thus far.
To carry this thread along, I'll pose another question, which is:
Does anyone know if there are any local, county and/or state jurisdictions
that
go beyond, or are in addition to, those regulations of OSHA and/or the NEC?
If
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