Defining The Probe Angle - GE USM 36 Series Technical Reference And Operating Manual

Defining the probe angle

5.13 Defining the probe angle
You can use the function AUTOANG to define the cur-
rent index angle of a probe on a reference block. The
current probe index angle is influenced, e.g. by different
materials or by the wear of the probe contact face.
A T T E N T I O N
You have to carry out calibration before us-
ing the function AUTOANG (see Chapter 5.8
Calibrating the USM 36, page 5-28).
USM 36
– After calibration, switch to the function group AU-
TOANG.
– Select the function BLOCK and then the range of the
calibration standard that includes the nominal value
of the probe angle (for example K2 30-65 for the nom-
inal value 45°).
– Shift the gate to the calibration echo.
– Switch to the function RECORD and press one of the
selector keys to record the calibration echo.
– Peak the echo. The USM 36 will automatically record
the time-of-flight of the echo with the maximum ampli-
tude occurring during this.
– Press one of the selector keys to set the function
RECORD back to OFF.
The calculated angle is briefly displayed at the bottom
edge of the display screen.
The values of the last measurement are automatically
entered in the function group TRIG, i.e. in the function
PROBE ANGLE there.
Issue 2 (12/2013)
5 Operation
5-49