GE USM 36 Series Technical Reference And Operating Manual page 202

5 Operation
● DGS CURVE (recording curve for DGS evaluation)
You can use this to select the circular disk-shaped re-
flector diameter to be used for displaying the DGS
curve and as a recording threshold for echo evalua-
tions.
● PROBE # (probe number)
The probe numbers refer to fixed-programmed
probes with all settings (name, probe delay, element
diameter, and frequency cannot be changed, see
page 5-132). The probe number 0 is user program-
mable with regard to all parameters.
● PROBE NAME (Probe name)
The probe name belongs to the selected probe num-
ber and can only be changed for the probe number 0
on the second operating level if necessary (function
group DGS, function PROBE NAME).
● XTAL FREQUENCY (probe frequency)
Frequency of the element or crystal; preset for pro-
grammed probes.
● EFF. DIAMETER
Effective element or crystal diameter of the probe
used; preset for programmed probes.
5-126
● DELAY VELOCITY
Sound velocity in the probe delay line; preset for pro-
grammed probes.
● REFERENCE TYPE
Type of the reference reflector used (backwall, side-
drilled hole, or circular disk-shaped equivalent reflec-
tor).
● REF SIZE
Diameter of the reference reflector.
● REF ATTEN
Sound attenuation in the reference block.
● AMPL CORRECT (amplitude correction)
This is required if you are using an angle-beam probe
and the circular-arc echo from the reference stan-
dards K1 or K2 as a reference reflector.
For the angle-beam probes SWB...-5, the amplitude
correction value refers to the 3mm side-drilled hole
on the reference standard K1 as reference reflector.
● TEST ATTEN
Sound attenuation in the test object.
● TRANSFER CORR.
Transfer losses in the test material.
Issue 2 (12/2013)
Evaluation according to the DGS method
USM 36