Epson USN 52L, Operating Manual

Page: 62 / 207

Krautkramer USN 52R/USN 52L Issue 05, 02/00 5-17
5.3 USN 52R/USN 52L calibration
Calibration of display range
Before you operate the instrument, you must calibrate
it. Depending on the material and the dimensions of the
test object, the sound velocity and the calibration range
have to be set and the probe delay taken into consider-
ation. In addition, the test sensitivity has to be adjusted
according to the specified requirements.
A
Attention:
In order to reliably operate the instrument, adequate
training in ultrasonics is required.
Calibration guarantees that
– the total thickness of the test object is displayed,
– the distance to the flaw or to the backwall of the test
object can be determined using the horizontal
position of the echo, or it can be digitally displayed,
– all flaws are displayed which must be detected
according to test specifications,
– the size of the flaw can be determined by
comparison with a known reflector.
H
Note:
For all calibration procedures, use a calibration block
which is made of the same material and has the same
temperature as your test object.
The following examples show three main methods of
ultrasonic testing:
• Testing with a straight-beam probe,
• Vertical testing with a dual (T/R) probe,
• Angle beaming with an angle-beam probe (transverse
waves).
With all calibrations you must
– set the pulser and receiver according to the test task
and
– decide whether you are going to use the FLANK or
PEAK mode for your measurements ( MEASURE
function int the lower operating level) before
calibrating.
USN 52R/USN 52L calibration
Operation
Krautkramer USN 52R/USN 52L Issue 05, 02/00 5-17
5.3 USN 52R/USN 52L calibration
Calibration of display range
Before you operate the instrument, you must calibrate
it. Depending on the material and the dimensions of the
test object, the sound velocity and the calibration range
have to be set and the probe delay taken into consider-
ation. In addition, the test sensitivity has to be adjusted
according to the specified requirements.
A
Attention:
In order to reliably operate the instrument, adequate
training in ultrasonics is required.
Calibration guarantees that
– the total thickness of the test object is displayed,
– the distance to the flaw or to the backwall of the test
object can be determined using the horizontal
position of the echo, or it can be digitally displayed,
– all flaws are displayed which must be detected
according to test specifications,
– the size of the flaw can be determined by
comparison with a known reflector.
H
Note:
For all calibration procedures, use a calibration block
which is made of the same material and has the same
temperature as your test object.
The following examples show three main methods of
ultrasonic testing:
• Testing with a straight-beam probe,
• Vertical testing with a dual (T/R) probe,
• Angle beaming with an angle-beam probe (transverse
waves).
With all calibrations you must
– set the pulser and receiver according to the test task
and
– decide whether you are going to use the FLANK or
PEAK mode for your measurements ( MEASURE
function int the lower operating level) before
calibrating.
USN 52R/USN 52L calibration
Operation