Important Notice
DMS 2 Operating Manual
Page iii
Important Notice
The following information must be read and understood by any
user of a Krautkramer ultrasonic thickness gauge. Failure to
follow these instructions can lead to errors in thickness mea-
surements or other test results. Decisions based on erroneous
results can, in turn, lead to property damage, personal injury or
death.
General Warnings
Proper use of ultrasonic test equipment requires three essential
elements:
•
Selection of the correct test equipment.
•
Knowledge of the specific “test application requirements.”
•
Training on the part of the instrument operator.
This operating manual provides instruction in the basic set up
and operation of the Krautkramer thickness gauge. There are,
however, additional factors which affect the use of ultrasonic
test equipment. Specific information regarding these additional
factors is beyond the scope of this manual. The operator
should refer to textbooks on the subject of ultrasonic testing for
more detailed information.
Operator Training
Operators must receive adequate training before using ultra-
sonic test equipment. Operators must be trained in general
ultrasonic testing procedures and in the set up and perfor-
mance required by a particular test. Operators must under-
stand:
•
Soundwave propagation theory.
•
Effects of the velocity of sound of the test material.
•
Behavior of the sound wave where two different materials
are in contact.
•
Areas covered by the sound beam.
More specific information about operator training, qualification,
certification, and test specifications is available from various
technical societies, industry groups, and government agencies.
Testing Limitations
In ultrasonic testing, information is obtained only from within the
limits of the sound beam. Operators must exercise great caution
in making inferences about the test material outside the limits of
the sound beam. For example, when testing large materials it
may be impossible or impractical to inspect the entire test piece.
