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 -
482 views
Technical Discussions
Louis
Louis
03:58 Apr-08-2006
Depth reading

Hi everyone,

Here is my probleme,

I have a plate of 1.5 in. At 0,750in I have a hole of 0,062in.
With my USN58L I can know the distance from my transducer, the sound path and the depth of this 0.062in hole.

But, when I move my transducer to Leg 2 with this same hole I still get the good distance from my transducer and also the good sound path, but the depth reading is 3.18in instead of 0,750in. I use a 45 deg. angle transducer and the thickness of the plate on my machine is set at 1.750in.

Is it possible that my machine can't give me the depth after Leg 1 and that I always have to use formulas.

Thanks a lot,

LouisB



 
 Reply 
 
Ed
Ed
06:25 Apr-09-2006
Re: Depth reading
----------- Start Original Message -----------
: Hi everyone,
: Here is my probleme,
: I have a plate of 1.5 in. At 0,750in I have a hole of 0,062in.
: With my USN58L I can know the distance from my transducer, the sound path and the depth of this 0.062in hole.
: But, when I move my transducer to Leg 2 with this same hole I still get the good distance from my transducer and also the good sound path, but the depth reading is 3.18in instead of 0,750in. I use a 45 deg. angle transducer and the thickness of the plate on my machine is set at 1.750in.
: Is it possible that my machine can't give me the depth after Leg 1 and that I always have to use formulas.
: Thanks a lot,
: LouisB
------------ End Original Message ------------

I don't believe the machine is incapable of calculating it. Try setting the thickness of the block at 1.5" as you stated it was and not 1.75". You may also want to check the actual angle in the material. Last but not least make sure you have the correct velocity entered in the machine. Then lastest but not leastest, make sure you are looking at the correct reflector and not an inclusion in the block. Did you try to plot the hole on the second leg?



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

Nigel

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
08:20 Apr-09-2006
Re: Depth reading
Louis

3.18" is the beam path skip distance to the hole (1.5 + 0.75)/cos 45 and you say that you get this distance as the "good sound path" which should be just that - 3.18". The fact that your machine is giving this figure as the depth of the hole cannot be mere coincidence, thus somehow the machine must have been set to give the beam path distance as the depth (maybe through a gate).

For a new and expensive piece of kit the sales rep or tech services of the supplier should assist in untangling your problem.

Good luck

Nigel

----------- Start Original Message -----------
: Hi everyone,
: Here is my probleme,
: I have a plate of 1.5 in. At 0,750in I have a hole of 0,062in.
: With my USN58L I can know the distance from my transducer, the sound path and the depth of this 0.062in hole.
: But, when I move my transducer to Leg 2 with this same hole I still get the good distance from my transducer and also the good sound path, but the depth reading is 3.18in instead of 0,750in. I use a 45 deg. angle transducer and the thickness of the plate on my machine is set at 1.750in.
: Is it possible that my machine can't give me the depth after Leg 1 and that I always have to use formulas.
: Thanks a lot,
: LouisB
------------ End Original Message ------------




 
 Reply 
 

Product Spotlight

NEW Wheel Type Phased Array Probe

DOPPLER NEW Wheel Type Phased Array Probe, more stable, new tyre makes lesser acoustic attenuation
...
, much lighter makes easier to handle, more slim size, magnetic and mechanical encoder optional etc...more
>

HARDNESS TESTER TKM-459CE combi

TKM-459CE combi applies 2 methods of hardness control: UCI and Leeb. It provides high-accuracy tes
...
ting of metals and alloys as well as items of different sizes and configurations, their hardened layers and galvanic coatings. Device represents results in HB, HRC, HV and others. Shock-, dust- and water-proof housing with intuitive software make this gauge easy to use in all working conditions.
>

NDT.net launches mobile-friendly design

NDT.net has revamped its website providing a mobile-friendly design.The front page received a comp
...
letely new design and all other sections are now reacting responsively on mobile devices. This has been a major step to make our website more user- friendly.
>

Sci Aps Z-Series Portable Handheld Analysers

The world’s only handheld analyzer that measures carbon content in stainless (yes even L-grades),s
...
teels, and cast irons. Also accepted for low Si analysis for sulfidic corrosion analysis, and is widely used in the power industry for Cr analysis, for flow accelerated corrosion applications.
>

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