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5-24 Issue 05, 02/00 Krautkramer USN 52R/USN 52L
MEASURE: MULTECHO – for measurement between
the first echoes in the gate sections. Above all, this
setting is suitable for thickness measurement in the
multiecho sequences.
TOF: According to the application.
Calibrating the sensitivity – B
B is of great help for sensitivity calibration. With B you
store a reference echo as a basis for your measure-
ment and amplitude evaluation. Gain differences in dB
between the amplitudes of any echoes and the stored
echo are directly displayed in the measurement line as
”H=”.
Operation:
– Couple the probe and peak the reference echo,
– Adjust the gain so that the echo reaches the required
height.
– Position Gate a on the reference echo. This must be
the highest echo in the gate,
– Press B. The reference echo is now stored. The
value is reset by pressing again.
Operation USN 52R/USN 52L calibration
Recall of dB difference:
– Set AMPLITUDE to dB THRESHOLD.
– Position the gate onto the required echo.
The dB difference is now displayed in the measurement
line. It indicates the dB amount by which the flaw echo
falls below or exceeds the reference echo.
5-24 Issue 05, 02/00 Krautkramer USN 52R/USN 52L
MEASURE: MULTECHO – for measurement between
the first echoes in the gate sections. Above all, this
setting is suitable for thickness measurement in the
multiecho sequences.
TOF: According to the application.
Calibrating the sensitivity – B
B is of great help for sensitivity calibration. With B you
store a reference echo as a basis for your measure-
ment and amplitude evaluation. Gain differences in dB
between the amplitudes of any echoes and the stored
echo are directly displayed in the measurement line as
”H=”.
Operation:
– Couple the probe and peak the reference echo,
– Adjust the gain so that the echo reaches the required
height.
– Position Gate a on the reference echo. This must be
the highest echo in the gate,
– Press B. The reference echo is now stored. The
value is reset by pressing again.
Operation USN 52R/USN 52L calibration
Recall of dB difference:
– Set AMPLITUDE to dB THRESHOLD.
– Position the gate onto the required echo.
The dB difference is now displayed in the measurement
line. It indicates the dB amount by which the flaw echo
falls below or exceeds the reference echo.