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Technical Discussions
Michael Williams
,
United Kingdom, Joined Nov 2016, 9

Michael Williams

,
United Kingdom,
Joined Nov 2016
9
12:29 Nov-11-2016
Maximum Current

Hi,
I'm just working through the BS EN spec and I've noticed theres a maximum KV based on the thickness of the test item. Is there also a maximum Amperage?
Regards
Mike

    
 
 Reply 
 
Leo
NDT Inspector,
Norway, Joined May 2008, 104

Leo

NDT Inspector,
Norway,
Joined May 2008
104
13:35 Nov-11-2016
Re: Maximum Current
In Reply to Michael Williams at 12:29 Nov-11-2016 (Opening).

No

    
 
 Reply 
 
Michael Williams
,
United Kingdom, Joined Nov 2016, 9

Michael Williams

,
United Kingdom,
Joined Nov 2016
9
09:53 Nov-12-2016
Re: Maximum Current
In Reply to Leo at 13:35 Nov-11-2016 .

Hi,
So if the KV is to be kept at a certain amount not to decrease contrast too much. What does effect does increase the amperage have in terms of image quality?
Regards
Mike

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

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
11:13 Nov-12-2016
Re: Maximum Current
In Reply to Michael Williams at 09:53 Nov-12-2016 .

Its a question of the optimum mA/minutes at the lowest feasible kV to achieve the desired penetration. Time being money the exposure is kept as short as possible therefore work is usually carried out at the maximum rated mA.

Check out Chapter 8 of the below link.

http://www.kodak.com/eknec/documents/87/0900688a802b3c87/Radiography-in-Modern-Industry.pdf

    
 
 Reply 
 
Michael Williams
,
United Kingdom, Joined Nov 2016, 9

Michael Williams

,
United Kingdom,
Joined Nov 2016
9
14:54 Nov-14-2016
Re: Maximum Current
In Reply to Nigel Armstrong at 11:13 Nov-12-2016 .

I've noticed that its only BS EN that mentions a maximum KV, it isnt mentioned in ASME?

    
 
 Reply 
 

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