GE USM 36 Series Technical Reference And Operating Manual page 111

Calibrating the USM 36
The correct calibration is confirmed by the message
AUTOCAL COMPLETE. The material velocity and
probe delay are set and displayed.
– Check the calibration on one or several known cali-
bration lines, e.g. using the stepped calibration block
VW.
N o t e
Always keep in mind that the measurement
value is determined at the intersection point
of the gate and the echo flank if the function
TOF MODE has been set to FLANK. The
correct setting of the echo height and the
gate threshold is therefore decisive for the
accuracy of calibration and measurement!
The use of the function AGT can be of help
in this connection (see Section Automatic
gate height, page 5-27).
Calibrations or measurements in PEAK
mode require some experience when using
dual-element probes in order to choose and
set the correct echoes.
USM 36 Issue 2 (12/2013)
5 Operation
5-35