UT IIW Type I Block Caution and Comments

This video explains some of the features of the IIW Type I reference block. The 4" and 9" reflectors that are used to calibrate are explained. There is also a caution about a mode converted signal that may cause an error when calibrating with some transducers and wedges.
Equipment: Olympus EPOCH 1000i UT tester, IIW Type I Reference Block, GE 5MHZ, 0.25" diameter transducer with a 45 degree screw on wedge.
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[@michaelmendoza8689]

Great video.....Thanks !!!

[@johnreid2691]

The 8" signal is not a mode conversion signal, it's a double reflection of the first 4" signal and it can be used for calibration if you set it at 8".

[@dinho9492]

Thanks🙏🏻

[@mikelarteta509]

By any chance can we reduce the db and get rid of that cross talk?

[@khariteja9061]

How do we can avoid that mode conversation signal before backwall during calibration

[@johnnyb28227]

The use of the AWS "snail wedge" will help prevent this.