Hi Paul,
Do you know of any commercial EMI test facilities that use
NAMAS NIS 81 to determine the measurement uncertainty
statistical factor and add it to their measured values?
Thx,
Tony
----------
From: Paul V. Zahra
To: Barge, Michael; 'emc-p...@ieee.org'
Subject: Re: Measurement Uncertainty
List-Post: emc-pstc@listserv.ieee.org
Date: Saturday, January 11, 1997 11:39AM
Measurement Uncertainty is described in NAMAS NIS 81. What
Tony is describing is a statistical method for a confidence
level over a certain sample allocation. Measurement uncertainty
takes in to account the errors associated with the Measurement you
are making and through other statistical methods give use a factor
to be added to the measured value ( Very basically described) for
an even higher confidence level.
Paul
At 03:33 PM 1/10/97 -0600, Barge, Michael wrote:
>
>
>FROM: michael_ba...@atk.com
>
>Item Subject: Measurement Uncertainty
>
>Greeting Tregers;
>
>There seems to be a requirement that, when giving a measured value, there
>must be an uncertainty associated with that value describing the confidence
>of that value.
>
>(1) Do most labs report an uncertainty measurement in the test report,
on
>the data sheet, on a certificate of compliance?
>(2) How did you generate the measurement of uncertainty for emission
>tests? For immunity tests?
>
> AND MOST IMPORTANTLY
>
>(3) What do you tell the customer when he is below the limit by less
than
>the measurement uncertainty? When he is above by less?
>
>J Michael Barge
>Alliant Techsystems
>Annapolis, MD
>
>
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| | |
Paul V, Zahra, NCE | :|: :|:
Manager, EMC and Safety Laboratories | :|||||: :|||||:
Corporate Compliance Engineering | .:|||||||:.:|||||||:.
| c i s c o S y s t e m s
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