Preparing The Instrument For Digital Measurement - Epson USN 52R Operating Manual

USN 52R/USN 52L calibration
Operation:
– In the function CAL press N and O simultaneously.
The function is now enabled.
– REC 0 is displayed, indicating that no calibration
echo has been recordet yet.
– Set the gate onto the first calibration echo and enter
the sound path in S-REF using M.
– Save the first calibration echo using M in the CAL
function. On the display: REC 1.
– Set the gate onto the second calibration echo and
enter the sound path in S-REF using M.
– Save the second calibration echo using M in thte
CAL function. On the display: REC 2.
– Press O on CAL again to terminate the 2-step
calibration procedure.
Automatic calibration is carried out after the instrument
has calculated the entered parameters and made a
plausibility check.
H Note:
To verify a correct instrument calibration, always check
Krautkramer USN 52R/USN 52L
the setting using the echo of a known distance, other
than those used for calibration.
Preparing the instrument for
digital measurement
USN 52R/USN 52L must be calibrated to the material to
be tested in order to give the correct measurement
readings.
H Note:
For all calibration procedures, use a calibration block
with a known thickness, made of the same material and
having the same temperature as your test object.
Preconditions:
To start with, calibrate the A-scan display as described
in the preceding section. Carry out the following basic
settings:
GATE LOGIC:
POSITIVE, NEGATIVE or MEASURE
MEASURE: 0 TO 1st – for measurement to the first
echo in the gate. By this, the thickness or the flaw posi-
tion can be measured.
Issue 05, 02/00
Operation
5-23