Manual Panasonic cq dfx444 (page 16 of 114) (English)

164754

Zoom out

Zoom in

1/114

DFX-444 Operator’s Manual Issue 3

4. Fundamentals of Ultrasonic Testing

The DFX-444 is a single-channel ultrasonic inspection instrument

used for the inspection of homogeneous materials for the presence

of inclusions, porosity and other discontinuities that could affect the

performance of materials and components. It can also be used for

thickness gauging of homogeneous materials, requiring access from

only one side of the test piece.

High frequency sound waves

are introduced into the test

material from a

transducer/probe that is

usually coupled to the test part

by water or other suitable

liquid coupling. The

transducer/probe converts the

electrical impulses of the

instrument into high frequency

sound energy. A short burst of

ultrasonic energy is introduced

into the test material and some

or all of the energy is reflected

by discontinuities and/or the

far surface of the test part. The

reflection of sound energy is a

function of the ratio between the acoustic impedance of the

discontinuity and the base material. The acoustic impedance of a

given material is the product of the density and the velocity of sound

in the material. The higher the ratio, the more sound energy that will

be reflected. The principle of ultrasonic testing is shown in Figure 1

which shows the ultrasonic energy in the test piece and the resulting

instrument display.

Thickness gauging with the DFX-444 operates on the principle of

time-of-flight of measurement. This principle utilizes the precise

timing of the transit time of a short burst of high frequency sound

energy through a material under test. The sound waves travel to the

Figure 1 – Basic Ultrasonic

Testing

Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

Forumrules

To achieve meaningful questions, we apply the following rules:

First, read the manual;
Check if your question has been asked previously;
Try to ask your question as clearly as possible;
Did you already try to solve the problem? Please mention this;
Is your problem solved by a visitor then let him/her know in this forum;
To give a response to a question or answer, do not use this form but click on the button 'reply to this question';
Your question will be posted here and emailed to our subscribers. Therefore, avoid filling in personal details.

new questions and answers
new manuals

You will receive an email to register for one or both of the options.

Get your user manual by e-mail

Enter your email address to receive the manual of Panasonic cq dfx444 in the language / languages: English as an attachment in your email.

The manual is 1,82 mb in size.

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.

Info

Panasonic cq dfx444 Manual

Product: