GE USM 36 Series Technical Reference And Operating Manual page 106

5 Operation
Case B: With unknown material velocity
Use the semi-automatic calibration function of the
USM 36 with the functions of the function group AUTO-
CAL for this calibration case.
You have to enter the distances (lines) of two calibration
echoes as default settings. The USM 36 will then carry
out a plausibility check, calculate the material velocity
and the probe delay, and set the parameters automati-
cally if the plausibility is given. Otherwise, an error mes-
sage is given.
5-30
– Set the required display range using the function
RANGE. The two selected calibration echoes must
be displayed on the screen. Set the range so that the
second calibration echo is positioned in the right half
of the screen.
– Switch to the function group AUTOCAL.
– Enter the distances of the two calibration echoes in
S-REF 1 and S-REF 2.
– Position the gate on the first calibration echo.
(A-START).
– Switch to the function RECORD and press one of the
selector keys.
– Press one of the selector keys again to record the first
calibration echo.
– Shift the gate to the second calibration echo.
– Switch to the function RECORD again and press one
of the selector keys to record the second calibration
echo.
Issue 2 (12/2013)
Calibrating the USM 36
USM 36