All language subtitles for [English (auto-generated)] TraiNDE UT - Practice Class 1 Straight probe calibration [DownSub.com]

Welcome to the train practice classes.

This series introduces a basis of UT

inspection and teaches how to use train.

This video will focus on the straight

beam contact probe calibration and

sensitivity settings.

When starting train, the software opens

a login window. Log in with the

credentials session and user that were

given by your trainer. Otherwise, log

into the guest session.

Once logged in, all the available

exercises are listed on the left side.

In the tutorial section, select the

steel plate tutorial.

The description of the selected exercise

is displayed at the center of the window

listing the specimens and probes

available.

Ensure to select the conventional device

option from the flow detector drop-down

menu.

Click on reset to initial to start at

the beginning of the exercise instead of

starting from where the previous user

stopped working on it.

Start the exercise with the play button.

When the exercise starts, three windows

will open.

The digital markup allows you to select

the specimen and the probe. On this

window, you can use the probe to scan

the specimen. It also offers settings

and educational tools for performing

inspections.

The conventional device is a simulator

of a conventional flow detector. It

displays the signal of the probe

according to the probe's position on the

specimen in the digital markup.

The workbench shows a 3D contextual view

of the inspection.

It also offers educational tools to help

understand ultrasonic testing.

This exercise includes a V1 block, a

step block with flat bottom holes, and a

steel plate to inspect. In the specimen

menu, select the V1 calibration block.

And in the faces menu, select the 25 mm

thick front face of this block. By

opening the probe menu in the menu bar,

you can select the probe for your

inspection. In this exercise, only a 4

MHz dual element straight beam probe is

available.

Scan the demi straight probe on the

front face of the V1 block displayed in

the digital markup.

The conventional device displays the

signal at the location and orientation

of the dummy probe. No signal is

displayed even though the probe is

located on the specimen. This is because

the conventional device is set up for

pulse eco and the probe selected is a

dual element probe. Open the main menu

of the conventional device and select

probe. Change the pulsor mode from pulse

eco to dual element. The signal now

appears when scanning the probe.

The default configuration of this

exercise activates the digital probe.

With this option enabled, the probe is

considered as always in contact with the

specimen. This is why the signal remains

displayed when the dummy probe is not in

contact with the touch screen.

The digital probe option also allows the

probe to be moved with the mouse or with

a finger.

You can activate or deactivate it in the

digital markup.

When this option is disabled, the probe

can only be moved by scanning the dummy

probe on the touch screen and the signal

only appears in the conventional device

if the dummy probe is in contact with

the touch screen.

The conventional device includes the

standard features of a conventional flow

detector. Its main menu allows you to

navigate different categories.

The category options are displayed

either at the top or on the left

depending on the size of the window.

You can scroll through the options when

the menu is larger than the window.

Some options are always displayed such

as gain, freeze, envelope, and gates

information.

The workbench offers a 3D visualization

of the inspected part. The scene can be

moved,

zoomed in or out,

and rotated.

The 3D view can be reset to its default

position.

Now that you have an overview of the

application's windows, let's get started

with the velocity calibration. The

ultrasonic wave travels within the

specimen at a velocity depending mainly

on the material but also on

environmental conditions. The velocity

calibration ensures the measurement of

proper distances. Ensure the dermi probe

is placed approximately at the center of

the front face of the V1 block. Set the

gain to 40 dB either with the calculator

or by clicking on the plus or minus

buttons.

Open the calibration category and set

the time base to 90 mm to display two

successive back wall eos.

Enable gate one and gate two.

You can set the gates up by changing the

values for start width and level or by

double clicking to enable the

interactive mode.

Position gate one on the first back wall

eco and gate two on the second back wall

eco.

You can delete the second gates

information display that will not be

used for the velocity calibration by

clicking on the minus button next to the

gate information.

Click on the remaining gates

information.

Select gate two and delta gate one.

This gives the measurement of the sound

path between the first back wall eco

given by gate one and the second back

wall eco given by gate 2.

You must now go to the calibration

category and set the velocity

iteratively to measure the 25 mm

corresponding to the thickness of the v1

block.

Once velocity is calibrated, you can

calibrate the zero. It eliminates the

wave travel time from the transmitting

element of the probe to the surface of

the inspected specimen. It then allows

you to perform the measurement from the

inspected surface rather than from the

pzo electric crystal.

Add a second gates information by

clicking on the plus button to display

the sound path measured by gate one. We

can verify that the gates information is

correctly displaying the sound path

measured by gate one.

Change the zero until the sound path of

gate one measures 25 mm.

You may have to change the gate settings

specifically start and width to keep

tracking the echos.

The next step is to calibrate the

sensitivity of the flow detector.

For this tutorial, we are using the flat

bottom holes of the step wedge as

reference flows. The result of a

sensitivity calibration is called a

distance amplitude curve, a DAC. The DAC

shows the amplitude variations of the

acoustic beam transmitted by the probe

within the specimen.

Select the step wedge into the digital

mockup.

Then display the flows.

Now the flat bottom holes are displayed

in red in both the digital mockup and

the workbench.

Display the central ray of the probes

beam in the workbench.

You may also use the section view to

help with visualization and pro

placement.

In the conventional device, open the

sensitivity category and click on the

sizing option to select DAC.

Click on edit to start the DAC creation

process.

Gates one and two are hidden and the

sizing gate in white is displayed and

will be used to set the DAC up.

Place the dummy probe over the third

flat bottom hole and move the gate to

trigger its eco.

Slightly scan the probe to find the

maximum amplitude to ensure that the

probe is placed right on top.

You may use the envelope to help you

find the maximum amplitude.

Click on add a point to record this

amplitude.

The gain is automatically adjusted to

set this eco at 80% screen height.

Repeat this process for all the flat

bottom holes.

If you add a point by mistake or if you

want to proceed again for the same flat

bottom hole, you can either replace or

remove the point by positioning the

sizing gate on the range of the existing

point. The point to be replaced is then

displayed in red.

To create a new DAC point, you need to

move the gates so that it doesn't have

existing points in its gate range.

Once you're done, you can click on okay

to finish the creation of the DAC.

Save your calibration so you can load it

later.

In this tutorial, you saw various

educational tools such as section views,

flow display, and central beam ray.

However, under real inspection

conditions, you must rely on the

information from your calibration block,

probe, and signal to place the probe

accurately. So, if you want to practice,

you can disable the educational tools.

Congratulations on completing this 20 UD

tutorial for straight beam calibration.

You are now ready to inspect the steel

plate of this exercise. We will explain

it further in the next video of the

train practical classes. Thank you for

watching this video. If you need further

information, please visit our website

trainy.extend.com

or contact us at tradyextend.com.