where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -
356 views
Technical Discussions
zaidi
zaidi
05:18 Jun-16-2009
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

 
 Reply 
 
Ed T.
Ed T.
08:27 Jun-16-2009
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".

 
 Reply 
 

Product Spotlight

Ultrasonic Testing Immersion Tanks with Unmatched Scanning Features

TecScan’s non-destructive testing Ultrasonic Immersion Tanks & scanners are designed for high pe
...
rformance and demanding NDT testing applications. Our Scan3D™ line of High Precision Immersion Tanks are specifically designed for automated ultrasonic testing of complex composites parts used in aerospace and industrial applications.
>

HARDNESS TESTER TKM-459CE combi

TKM-459CE combi applies 2 methods of hardness control: UCI and Leeb. It provides high-accuracy tes
...
ting of metals and alloys as well as items of different sizes and configurations, their hardened layers and galvanic coatings. Device represents results in HB, HRC, HV and others. Shock-, dust- and water-proof housing with intuitive software make this gauge easy to use in all working conditions.
>

32:128PR PAUT & 2-ch TOFD Flaw Detector: SyncScan 2

●32:128PR PAUT with optional 2-ch TOFD to maximize your efficiency ●Support PR mode for corrosi
...
on inspection ●Multiple solutions for welds & corrosion ●Faster scan speed (Approximately 3 meters/minute) ●Light weight: 4kg only including battery
>

NEW Wheel Type Phased Array Probe

DOPPLER NEW Wheel Type Phased Array Probe, more stable, new tyre makes lesser acoustic attenuation
...
, much lighter makes easier to handle, more slim size, magnetic and mechanical encoder optional etc...more
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window