This standard is issued under the fixed designation E; the number 1 This guide is under the jurisdiction of ASTM Committee E07 on Nondestruc-. Originally contact ASTM Customer Service at [email protected] For Annual Book of ASTM approved in Last previous edition approved in as E Buy ASTM E Standard Guide for Evaluating Performance Characteristics of Phased-Array Ultrasonic Examination Instruments and Systems from SAI.
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E22491 there are far too many variables for the manufacturer of probes and instruments to try to look after these limitations and in the end the verification of suitability is had by looking at the d2491 on targets like those suggested in E Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Marc and myself have been discussing about the ACG recently, so he forwarded this topic to me.
Re: Question about ASTM E
Other electronic instrument characteristics in phased-array units are similar to non-phased-array units and may be measured as described in Guide E or E Very interesting topic, I look forward to read your point of view, or from others too.
I personally would have aztm something like: There is also a concern for focusing.
Link to Active This link will always route to the current Active version of the standard. I went through ASTM E and the discussions in the forum but I found nothing on the surface roughness of phased-array blocks.
Perhaps surface finish of a block merits a new thread.
ASTM E2491 TYPE B PHASED ARRAY ASSESSMENT BLOCK, 1018 STEEL
Now the sstm point I want to bring to your attention is that the exit point moves from a phased-array probe. Other electronic instrument characteristics in phased-array units are similar to non-phased-array units and may be measured as described in E or E Active view current version of standard.
The diagrams in E are examples of how target patterns can be arranged to carry out some of the assessments.
Some combinations may tolerate a bit more range and others less but is generally pushing thing past the limit in all cases. The compensation is typically performed electronically at multiple angles.
This could be 16mm for a long soudpath in a sstm over the range you indicated! Regards Ed Start Original Message But I had a hard time to calibrate from 35 to 75 degrees with the radius of the IIW block. Or maybe the definition implicitly includes the TCG because the two can’t live together when doing S-scan calibration. Let me know if you have a suggestion for better wording and I can prepare the necesary changes to the document.
ASTM E TYPE B PHASED ARRAY ASSESSMENT BLOCK, STEEL – NDT
The wording in this definition does not seem to reflect the true intent of the function. As I understand, ACG is used to compensate the attenuation due to beam steering.
The compensation is typically performed electronically at multiple depths. E gives guidance on evaluating performance of phased-array systems.
Instrument characteristics measured in accordance with this guide are expressed in terms that relate to their potential usefulness for ultrasonic examinations. Any clarification will be appreciated! Hi, I am trying to make a phased-array reference block for a specific application.
It is as you stated, to compensate for the effect of steering which is effectively for echo-transmittance loss with increasing f2491 to some extent there is the added compensation for the slight change in wedge-path. You will end up with a distorted S-scan. In the description for steering limit it is considered that the asym is being assessed for a particular application. Is it a possibility to still use the radius and move the probe for each angle?
Ginzel, hello Marc, Marc and myself have been discussing about the ACG recently, so he forwarded this topic to me. All or portions of the guide may be used as determined aztm the user.
I have noticed the same thing that Marc did when I calibrated using a side-drilled hole at constant depth, so I turned to the radius. It is the responsibility of the user of this standard to zstm appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.