where expertise comes together - since 1996

Web's Largest Portal of Nondestructive Testing (NDT)
Open Access Database (Conference Proceedings, Articles, News), Exhibition, Forum, Network

All Forum Boards
Technical Discussions >
Instrument with attenuation : b-a-c
Career Discussions
Job Offers
Job Seeks
Classified Ads
About NDT.net
Articles & News

278 views
05:18 Jun-16-2009
zaidi
Instrument with attenuation : b-a-c

Hi everyone,

I've been confusing about expression "Instrument with attenuation : b-a-c" in AWS D1.1 2006 Sect.6.26.6.5.Could you please explain me about it, And when we have to use the formula(b-a-c) instead of the a-b-c? As my knowledge that most UT Technicians only use the a-b-c when they evaluate every defect found.Thanks in advance for further kind explaination.

Best Regards,
Zaidi

 
08:27 Jun-16-2009
Ed T.
Re: Instrument with attenuation : b-a-c In Reply to zaidi at 05:18 Jun-16-2009 (Opening).

Some of the UT instruments "in the old days" had atenuation controls rathe rthan gain controls. It would reduce gain as you turned it up rather than increase gain. I am not even aware of any modern day instrumentsthat have it.

It's just the opposite so AWS used "b-a-c=d" instead of "a-b-c=d".

 


© NDT.net - The Web's Largest Portal of Nondestructive Testing (NDT) ISSN 1435-4934

Open Access Database, |Conference Proceedings| |Articles| |News| |Exhibition| |Forum| |Professional Network|