Echo Evaluation With Dac/Tcg - Epson USN 52R Operating Manual

Echo evaluation with DAC/TCG

5.6 Echo evaluation with
DAC/TCG
To be able to evaluate a flaw indication by means of the
DAC/TCG, certain requirements have to be met:
• The Distance-Amplitude Curve must already be
recorded.
• It only applies to the same probe that was used for
recording the curve. Not even another probe of the
same type must be used!
• The curve and the DAC/TCG only apply to the
material that corresponds with the material of the
reference block.
• All functions affecting the echo amplitude must be
set as they were during recording of the curve. This
especially applies to the following functions:
DAMPING, FREQ.,RECTIF., MTL VEL, PULSER
and REJECT.
• TOF is set to PEAK.
• AMPLITUDE is set to dB THRESHOLD.
Krautkramer USN 52R/USN 52L
• Choose the echo amplitude (as dB difference to the
curve) using the T V -keys for an enlarged
representation in the A-scan.
Issue 05, 02/00
Operation
5-31