Epson USN 52R, USN 52L manual Calibrating the sensitivity B

Operation USN 52R/USN 52L calibration

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

Bis of great help for sensitivity calibration. With Byou 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.

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