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ULTRASOUND INSTITUTE
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Technical Discussions
Mikel
Mikel
21:41 Oct-23-2017
DGS-AVG with GE SEB2-0º probe

Has anyone had problems with GE SEB2-0º DGS-AVG evaluation curves? In my case, the 3mm FBH signals from a reference block don't coincide with the corresponding USM35 DGS curve and the ERS sizing error is 1 to 2 mm at diferent depths.
Does anyone know anything about this?
Thanks!

    
 
 Reply 
 
S.Senthilkumar
Engineering, QA/QC/NDT
NOV (National Oilwell Varco), Angola, Joined Mar 2006, 41

S.Senthilkumar

Engineering, QA/QC/NDT
NOV (National Oilwell Varco),
Angola,
Joined Mar 2006
41
10:05 Oct-25-2017
Re: DGS-AVG with GE SEB2-0º probe
In Reply to Mikel at 21:41 Oct-23-2017 (Opening).

If I understand correctly, DGS curve is for particular transducer. Use the GE Reference block it should match. different manufacturer there will be slightly different.

    
 
 Reply 
 
Rick Cahill
Rick Cahill
14:32 Oct-30-2017
Re: DGS-AVG with GE SEB2-0º probe
In Reply to Mikel at 21:41 Oct-23-2017 (Opening).

Confirm that you are using the curve for the SEB2 with zero-degree roof angle and not the curve for a standard SEB2-E, which has a roof angle.

    
 
 Reply 
 
Mikel
Teacher,
GOIERRI SCHOOL, Spain, Joined Dec 2013, 6

Mikel

Teacher,
GOIERRI SCHOOL,
Spain,
Joined Dec 2013
6
19:27 Oct-30-2017
Re: DGS-AVG with GE SEB2-0º probe
In Reply to S.Senthilkumar at 10:05 Oct-25-2017 .

Thanks S.Senthilkumar, but this only occurs with SEB2-0º DGS curve. With other probes DGS curves the results are correct.

    
 
 Reply 
 
THEO MICOTTIS
Italy, Joined May 2013, 77

THEO MICOTTIS

Italy,
Joined May 2013
77
09:17 Oct-31-2017
Re: DGS-AVG with GE SEB2-0º probe
In Reply to Mikel at 19:27 Oct-30-2017 .

Hi Mikel, which are the depths/soundpath to FBH's. Regards Theo

    
 
 Reply 
 
Mikel
Teacher,
GOIERRI SCHOOL, Spain, Joined Dec 2013, 6

Mikel

Teacher,
GOIERRI SCHOOL,
Spain,
Joined Dec 2013
6
09:21 Oct-31-2017
Re: DGS-AVG with GE SEB2-0º probe
In Reply to THEO MICOTTIS at 09:17 Oct-31-2017 .

Hi Theo, the depths/soundpath to FBH's are 50, 80, 120 and 180mm. Have you any idea about the problem?

    
 
 Reply 
 
Ronny
Ronny
09:01 Nov-01-2017
Re: DGS-AVG with GE SEB2-0º probe
In Reply to Mikel at 21:41 Oct-23-2017 (Opening).

Hi Mikel,in my experience,there is no channel for SEB 2-0° in USM 35. So did you make DGS curve in custom channel?

    
 
 Reply 
 
Mikel
Teacher,
GOIERRI SCHOOL, Spain, Joined Dec 2013, 6

Mikel

Teacher,
GOIERRI SCHOOL,
Spain,
Joined Dec 2013
6
17:02 Nov-01-2017
Re: DGS-AVG with GE SEB2-0º probe
In Reply to Ronny at 09:01 Nov-01-2017 .

Sorry!!!! I put USM35 in my first message, but instrument is a USM36

    
 
 Reply 
 
THEO MICOTTIS
Italy, Joined May 2013, 77

THEO MICOTTIS

Italy,
Joined May 2013
77
18:34 Nov-02-2017
Re: DGS-AVG with GE SEB2-0º probe
In Reply to Mikel at 17:02 Nov-01-2017 .

Hi Mikel, I suggest you to make a cross-check of AVG diagram loaded in your equipment with paper AVG diagram of the probe.

    
 
 Reply 
 

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