Sensitivity & TCG Calibrations

Not enough is discussed about exactly what each of these calibrations accomplishes, and why one is absolutely necessary and the other is usually superfluous. Just because there's a button there doesn't mean you have to touch it.

[@dudhathiren93]

It was indeed a nice explanation. There are still many folks around word doesn't know the basics of different calibration. This will help them to understand better.

[@IAMBELEVEN]

thank you Paul for taking the time and effort to break things down...i appreciate your dedication.

[@samhornbymusic]

Shouldn't have watched this half way through my course.... Thanks Paul!

[@Cluni-80s]

Great video as always.
Thanks.
xox

[@keketana]

Thank you 🙏so difficult to make anderstand to customer or level 3 because of codes and normes mistake. Kévin Grivel, NDT specialist in France.

[@suhelh6065]

You should mention Praveen Pilgam here lol

[@pedrovskis]

RIP my boy Praveen. Probably got his certs from a cereal box.

[@davidherman3932]

Same video for velocity calibrations, not always a requirement if the +/- is within code allowance.

[@santiagocruz9060]

Thanks sr, very useful.

[@dinho9492]

Thanks 🙏🏼

[@zuhaibahmad9687]

Thanks Paul for the explanation. Can you explain that after sensitivity calibration when we go for the first point of TCG calibration we are reducing the gain initially. After tracing, once we add the point, all angles compensates to 80% but the visual dB on omni scan doesn't increase. Can you please explain. Thanks

[@hollowayndtengineeringinc.5201]

This should not be the case if the 1st point of the TCG is also the point you did the sensitivity calibration with.

[@bacelismael8687]

Thank you very much for your fantastic videos as always.
Just wondering, do you have any plans to do anything about TOFD? , probably it's something missing on your channel.
Peace, best of luck ;)

[@hollowayndtengineeringinc.5201]

I just ran TOFD this week. But it was thin wall and a little underwhelming. Gotta get me some of them Limbo TOFD probes from GB and try again.

[@bacelismael8687]

@hollowayndtengineeringinc.5201 good luck with that one, hopefully it goes better next time!

[@french-bv4xi]

So just wedge delay then TCG?

[@hollowayndtengineeringinc.5201]

Pretty much, yeah.

[@yashgamers9608]

​@@hollowayndtengineeringinc.5201 Hai could you provide a precal vedio for sectorial and linear using single index how to do the accurate precal please make a vedio..... Thank you

[@ndthero]

Does this logic work the same if the sensitivity reflector is a different size than the TCG reflectors?

[@hollowayndtengineeringinc.5201]

Sorta, yeah. It will just skew things but after the TCG you should be fine. Even if you ran the sensitivity calibration on a radius (as it was originally intended) and not a hole or a notch, the TCG will fix everything.

[@JewishInjection]

If you're referring to using a NAVSHIP type block for TCG and ASME basic block for sensitivity. Build TCG first, then go to ASME basic and figure which leg (1,2, or 3) yields the highest amplitude, keep your probe there, then reduce amplitude to desired reference %FSH

[@BP-ot3mf]

Ha! I’m 1st!