Specifications

USN52 L Operating Manual Page 1
Important Notice
Please read the following information prior
to use of any Krautkramer instruments.
General Warning
The correct and effective use of ultrasonic
test equipment requires the interaction of
three essential factors:
• The test equipment itself
• The specific test applications
• The operator
The principal purpose of this operating
manual will be to give instructions in the
basic set-up and functional operation of the
test equipment. Such information is cov-
ered in detail within the manual.
Other variable factors, some of which are
noted below, and the actions necessary to
control them, are the responsibility of the
customer/user. Details regarding these fac-
tors are beyond the scope of the operating
manual.
Training
The customer must provide for adequate
training of the operators to assure compe-
tence in the operation of the equipment and
in the associated factors. The operator must
be trained both in general ultrasonic testing
procedure and in the set-up and perfor-
mance of a particular test or application.
The requirements for formalized training,
qualification, and certification of operators
are included, for example, in SNT-TC-1A,
and are referenced in many other industry
specifications.
Ultrasonic Theory
Knowledge of soundwave propagation
theory, including the effects of velocity of
sound, attenuation, reflection, and the limi-
tation of the sound beam must be under-
stood by the operator.
Test Application Requirements
These include a definition of the test prob-
lem, selection of suitable techniques, ad-
equate probes, proper couplant, evaluation
of discovered conditions in the test mate-
rial, and the selection of acceptance or re-
jection limits. Knowledge of the probability
of occurrence of defective conditions is of-
ten based on experience as well as engi-
neering knowledge of the system and its
stresses.
Customer engineers should supply specific
test application requirements to the operator.
Coverage and Location of Test
In ultrasonic testing, the information ob-
tained instantaneously represents only the
data from within the limits of the sound
beam. Selection of test locations as well
as the degree of scanning or coverage of
the part, is based on customer knowledge
of expected defective areas, material be-
ing tested, environment and similar factors.
Geometry of the part, or presence of flaws
or other interfaces, may shadow certain
areas located deeper in the test material,
even though within the limits of the sound
beam, thus preventing detection of possible
conditions in the shadowed area.
Important Notice