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 -
770 views
Technical Discussions
Phanindra Kumar
Phanindra Kumar
06:31 Mar-02-2010
Intial pulse in UT instrument

Dear all,

i'm using two UT instruments. The older equipment is giving good intial pulse even at 10mm Range. But the new equipment which i got recently, that is not giving intial pulse at 10mm range. All the parameter settings are same with the comparision of older instrument. But the old instrument is giving good intial pulse. Where as the new instrument is giving multiple echoes instead of intial pulse.

Can anybody explain the reason behind it. Sorry for not revealing the Instrument's NAME.

Please clarify.

 
 Reply 
 
ezio
Other, Retired ex Laboratory Technical Manager
OMECO Research Centre, Italy, Joined Sep 2008, 273

ezio

Other, Retired ex Laboratory Technical Manager
OMECO Research Centre,
Italy,
Joined Sep 2008
273
21:05 Mar-02-2010
Re: Intial pulse in UT instrument
In Reply to Phanindra Kumar at 06:31 Mar-02-2010 (Opening).

if the probe is the same the second instrument is broken or wrong used (my opinion)

 
 Reply 
 
Michel Couture
NDT Inspector,
consultant, Canada, Joined Sep 2006, 856

Michel Couture

NDT Inspector,
consultant,
Canada,
Joined Sep 2006
856
04:08 Mar-03-2010
Re: Intial pulse in UT instrument
In Reply to ezio at 21:05 Mar-02-2010 .

Phanindra,

It is a little difficult to make a proper diagnostic regarding your new instruement since you do not divulge the make of this new UT set and the old one as well. But one thing that comes to mind with this new instrument is the possibility of the PRF (pulse repetition rate) being too high. If this is the situation, you will have multiple false echo on your screen resulting from the interference of the sound pulse going into the part with the previous one coming back to your transducer.

If yor PRF is adjustable, try adjusting it to about 400 or if it is a Low - Medium - High type selection, try lowering it to a medium setting. With a static inspection, the PRF doesn't need to be very high.

Other thing you are not mentioning either is the frequency and probe size. This may also have an effect on your IP. Change your probe and see if your results are different between the instruments. Like Ezio said, it maybe your probe. This would eliminate it.

 
 Reply 
 

Product Spotlight

Combination of Digital Image Correlation and Thermographic Measurements

The combination of measuring results from the digital image correlation (ARAMIS, DIC) and temperat
...
ure measuring data from infrared cameras permits the simultaneous analysis of the thermal and mechanical behavior of test specimens in the materials and components testing field.
>

Panther

M2M PANTHER is a phased-array equipment designed for both desktop and industrial applications, offer
...
ing unparalleled performance in a compact unit. It combines the speed required for industrial integrated Phased-Array Ultrasound (PAUT) solutions, with the most complete set of total focusing method (TFM) imaging techniques, making it the ultimate tool for R&D and procedure qualification.
>

iProbe - USB Phased Array Probe

Turn your PC, Laptop or Tablet into a powerful 32:64 Phased Array system with our USB powered Phas
...
ed Array iProbe and inspection software package. Perform affordable weld inspection and corrosion mapping inspections with this powerful but small system. The probe has a 100V pulser, 8K PRF, dual axis encoder input and achieves outstanding signal quality.
>

NOVO Armor 15 & NOVO Armor 22

The Armor Kit Contains the NOVO Armor, which provides additional mechanical protection to the NOVO 1
...
5WN & NOVO 22WN Detectors, the Armor Stand and a traveling soft cover. - Newest shock absorbent technology case - Water resistant design - Supports wired & wireless communication - Multiple positioning options - Tripod connection using the Built-in 1/4” threads - Simple Detector battery replacement
>

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