From: Jon Griver
Sent: Monday, March 20, 2006 2:03 AM
It is my understanding that it is purely the responsibility
of the owner
of the measuring instrument to decide on the calibration period.
Hi, Jon.
ISO 17025, Subclause 5.10.4.4, agrees with you.
However, in dealing with various
Ron -
At a previous employer, we operated under CSA Category Certification
Program. One of the basic requirements at the time was compliance with
ISO Guide 25 (later becoming 17025). The point is that any company
using the CCP that was not already compliant with ISO 17025 should have
been
[mailto:emc-p...@ieee.org] On Behalf Of
rehel...@mmm.com
Sent: 03/20/2006 1:07 AM
To: emc-p...@ieee.org
Subject: Re: Calibration of test equipment
Mike, I have searched for this answer before. I have not found anything
anywhere that requires a specific time period between calibration. Just
manufacturers
the extra on the
calibration bill.
I hope I have described this adequately well.
Regards
Tim
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of
rehel...@mmm.com
Sent: 20 March 2006 09:07
To: emc-p...@ieee.org
Subject: Re: Calibration of test equipment
*** WARNING
insurers would want them
to take responsibility for specifying calibration periods which may be
inappropriate for the actual use to which the measuring device is put.
Jon Griver
http://www.601help.com
The Medical Device Designers' Guide to IEC 60601-1
Subject: Re: Calibration of test equipment
Mike, I have searched for this answer before. I have not found anything
anywhere that requires a specific time period between calibration. Just
manufacturers recommendations or whatever is agreed between you and your
calibration lab. The dangers of extending it beyond a year has been
documented
Technology Inc.
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of John
Woodgate
Sent: Friday, March 17, 2006 1:43 AM
To: emc-p...@ieee.org
Subject: Re: Calibration of test equipment
In message
e1ba0362b28ed211a1e80008c71ea30603387...@z-160-100-30-252.est.ibm.com,
dated Fri, 17 Mar
There have been many responses to this question regarding MRAs. However, I
don't know if anyone is aware that the Canadian Standards Association (CSA) is
in the process to eventually have their category certification clients at
least ISO 17025 compliant. Also, as far as calibration interval, if
Fax: (+44) 1245 453410
Mob: (+44) 7801 723735
From: Gordon,Ian [mailto:ian.gor...@bocedwards.com]
Sent: 17 March 2006 09:12
To: 'Mike Hopkins'; emc-p...@ieee.org
Cc: Tricia Rakiey
Subject: RE: Calibration of test equipment
Mike et al
Our EMC lab is audited annually by TUV to ISO 17025
In message
e1ba0362b28ed211a1e80008c71ea30603387...@z-160-100-30-252.est.ibm.com,
dated Fri, 17 Mar 2006, Gordon,Ian ian.gor...@bocedwards.com writes
if, when it NEXT goes for calibration whether it was found to be
outside the manufacturers specification or not. If it is found to be
outside
Mike et al
Our EMC lab is audited annually by TUV to ISO 17025 and the company as a
whole is audited annually by BSI and accredited to ISO 9001:2002. As we
only do in-house testing the cost/benefit of full UKAS accreditation for the
EMC lab isn't worthwhile.
The concerns regarding calibration
Hi Mike,
the EN's dont usually mention much about calibration. I don't recall now any
EMC standards saying that, but e.g. EN 60950-1 says how to calibrate the touch
current measuring device.
With regards to accreditation, the lab can assign the calibration interval as
they wish but as it needs
I think you're misunderstanding the function of
the MRA's. MRA's allow non-EU states to designate
testing and accreditation bodies on their own
territory as Notified Bodies. Normally, in the
absence of an MRA, a Notified Body has to be
located on EU soil since EU Member States can
only
Mike,
I'm not sure your right that CE marked products require Accredited
calibrations. It is usual that ASSESSMENT bodies do. There is a difference.
Assessment bodies of course want to further their own grip on the
requirements...MHO...
Mike Hopkins wrote on 3/16/2006, 3:31 PM:
It's my
: Tuesday, February 27, 2001 2:20 PM
To: 'emc-p...@ieee.org'
Subject: RE: Calibration of test equipment
As soon as a reference device goes out into the general lab population,
it's subject to physical and electrical abuse. It may take you quite a
while
to notice that some device has just
As soon as a reference device goes out into the general lab population,
it's subject to physical and electrical abuse. It may take you quite a
while
to notice that some device has just one attenuator range that's damaged
(but
not completely blown, just shifted a bit).
As far as I'm concerned,
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Monday, February 26, 2001 1:52 PM
To: Jon D. Curtis
Cc: Flinders, Randall; michael.sundst...@nokia.com; c...@prodigy.net;
brian.harl...@vgscientific.com; emc-p...@ieee.org
Subject: Re: Calibration of test
...@curtis-straus.com]
Sent: Monday, February 26, 2001 10:48 AM
To: Flinders, Randall
Cc: michael.sundst...@nokia.com; c...@prodigy.net;
brian.harl...@vgscientific.com; emc-p...@ieee.org
Subject: Re: Calibration of test equipment
As I understand it the interpretation to have tracibility to your
3a9aa4c8.3df94...@curtis-straus.com, Jon D. Curtis jdc@curtis-
straus.com wrote:
I personally think this interpretation is overly severe, but we comply with it
because we want our test reports to be accepted by authorities who think this
process is reasonable.
You are effectively succumbing to
One method I have seen used is to have a reference instrument calibrated and
then immediately use that instrument to calibrate/verify other instruments of
it's type in house. After that process, the reference is placed back into
standard duty until the next cal cycle. This way, at the time of
As I understand it the interpretation to have tracibility to your national
authority through equipment used only for calibration originated with NAMAS.
Some other accreditors have picked it up since then.
The requirement need not be that onerous. You can calibrate your own equipment
traceably
Does this mean that a signal generator that is used for Radiated
Immunity testing should not be used to calibrate Pre-Amps and Cables?
How about Antenna Calibration? Can you use the same receiver you use on
the OATS to calibrate those? I know this is a common practice with
Commercial Test
Brian,
my concern with your statement would be suggesting use of a NAMAS accredited
lab Why not A2LA or other body.
I know of a number of great cal labs with no accreditation
Derek Walton
---
This message is from the IEEE EMC Society Product
Schleppers of the world, unite !
Vitaly
-Original Message-
From: Price, Ed [SMTP:ed.pr...@cubic.com]
Sent: Monday, February 26, 2001 7:37 AM
To: 'Brian Harlowe'; 'emc-p...@ieee.org'
Subject:RE: Calibration of test equipment
I think there is a special requirement to keep the calibration equipment
separate from the EMC equipment. In other words the calibration equipment
can only be used for the calibration process and not for testing EMC.
Michael Sundstrom
Product Test Technician EMC
Nokia Mobile Phones, Dallas
Brian:
I calibrate my spectrum analyzer after every time I drop it.
Ed
-Original Message-
From: Brian Harlowe [mailto:brian.harl...@vgscientific.com]
Sent: Monday, February 26, 2001 12:54 AM
To: 'emc-p...@ieee.org'
Subject: Calibration of test equipment
I seem to have hit a raw
At the least, I would expect the test eqipment parameters/characteristics to
be checked via other test equipment that is in current calibration traceable
to NIST or NAMAS. This check would require a documented procedure.
- Original Message -
From: Brian Harlowe
f9d85b6af82bd4119ae800d0b769603b2c6...@kestrel.vgscientific.com, Brian
Harlowe brian.harl...@vgscientific.com wrote:
I seem to have hit a raw nerve by suggesting that emc test equipment should
be NAMAS calibrated. But surely some cost for calibration should come into
the equation. Surely no
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