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- since 1996 -
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Technical Discussions
Vishal Uttekar
NDT Inspector, Completed UT Level-2 recently.
Bharat Forge Ltd., Mundhwa, Pune, India, Joined Jan 2013, 72

Vishal Uttekar

NDT Inspector, Completed UT Level-2 recently.
Bharat Forge Ltd., Mundhwa, Pune,
India,
Joined Jan 2013
72
07:32 Mar-20-2013
About some features.

Hello Friends,
In our company we are using two digital UFD at our disposal viz. 1. USM Go advanced
from GE and 2.Ecograph 1090 from Karl Deuitsch. However there are some features in those machines which are still not understand to me. Can anybody please explain what is the exact purpose of these features and how they should be utilised?
In USM Go Advanced :
1. Echomax, 2. AGT(Automatic Gate Thresholding) 3.Pulser spike 4.Energy

In Echograph 1090
1. Inverse Plot 2. Envelope 3. Fill Echos

Also there is a common feature in some digital UFDs which is "Echo Fill" by keeping it on A-scan appeared as filled. I want to know whether this feature is given just for improving the visibility & readability or there is some other reason.
Also, in many digital UFDs there is a provision for non rectified i.e. RF presentation. I want to know that whether this type of scan presentation is really useful in some contexts as almost all the time people use the full wave rectified type scan presentation?
I have completely go thru the instrument's manual & also from the web resources but not get satisfactory answer. Will anybody please elaborate?

 
 Reply 
 
sadek997
NDT Inspector,
AR, Poland, Joined Feb 2011, 12

sadek997

NDT Inspector,
AR,
Poland,
Joined Feb 2011
12
22:13 Mar-20-2013
Re: About some features.
In Reply to Vishal Uttekar at 07:32 Mar-20-2013 (Opening).

Dear Vishal
My suggestion for You is to read the manual once more, than go to the aparatus menu and try to change the mentioned options and see what happends. In my opinion those features are strictly described in the manual (in most cases) and after completion of the UT course You should be eble to set Your UFD together with the aforementioned functions - some are stated to be the same during the calibration/curve setting etc.

Belive me You'll learn much more (and remember) by trying to check what does the function change instead of getting a simple question/answer response.

good luck in studying
Reagrds

 
 Reply 
 
Vishal Uttekar
NDT Inspector, Completed UT Level-2 recently.
Bharat Forge Ltd., Mundhwa, Pune, India, Joined Jan 2013, 72

Vishal Uttekar

NDT Inspector, Completed UT Level-2 recently.
Bharat Forge Ltd., Mundhwa, Pune,
India,
Joined Jan 2013
72
11:17 Mar-21-2013
Re: About some features.
In Reply to sadek997 at 22:13 Mar-20-2013 .

Dear Sadek,
First of all thank you very much for your reply. But it seems that you didn't
get my point clear. I have seen what is happening after changing the features
and also have read the concerned user manuels many times. I know what will
happen by changing a particular setting, but I want to know what is the exact purpose for providing that feature. Whether it has been provided just for user convienience or is there any technical reason behind it. Also in what situation
one should use a particular feature?
I make my point clear with help of an example:
There is a feature in "Ecograph 1090" of Karl-Dueisch make named- "Envelope"
and there are three options in it viz. 1.Record 2.Hold & 3.Off. When we set this feature on "Record" the current A-scan is traced out and the space is filled
with gray color. But I want to know whether this feature is really helpful to the
operator either from technical aspect or aesthetic aspect (i.e. for improving the visibility of A-scan)? Or it is just given without any reason. Thats what I am asking to you? I am damn sure there must be some particular use of these features so thet they can be effectively utilised.
The same question is about other features I have mentioned in my previous post. If you or anybody using that machines and having thorough hands-on experience on it, please help me.

 
 Reply 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
15:45 Mar-21-2013
Re: About some features.
In Reply to Vishal Uttekar at 11:17 Mar-21-2013 .

Its good for maximising signals such as when setting a DAC.

 
 Reply 
 
ismet hoxha
NDT Inspector,
Italy, Joined Nov 2011, 49

ismet hoxha

NDT Inspector,
Italy,
Joined Nov 2011
49
19:19 Mar-21-2013
Re: About some features.
In Reply to Vishal Uttekar at 07:32 Mar-20-2013 (Opening).

Hi Vishal, envelope, is a function that could be used even ;
firstly, if we want to evaluate extension of the discontinuity on a direction. In the case of a discontinuity which has length more than the beam width, moving the probe on that direction, on the screen there will a trace that has an certain extension parallel to the time axis (elongated discontinuity). At the same condition as above, if the length of the discontinuity is smaller than the beam width in that direction, the trace on the screen is without parallel extension (point discontinuity)
second, watching the trace is possible to understand if the discontinuity is coherent or not, you have to try using this function and find out on the respective traces the difference between a notch and a crack.
pulsar spike, in recent times Mr. Ginzel has suggested a good article titled "needles or square", if I remember well is a GE article, look for it in the forum, it's very interesting.
RF presentation or Radio Frequence, you should know that signal in A-scan is modified, an experienced technician could use this function for more information about discontinuity.
finally, I think your instruments supplier should provide even a minimum of knowledges about basic functions.
all the best

 
 Reply 
 

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