DFX-7
Ultrasonic Flaw Detector
15
REFERENCE GAIN:
Toggles the DRAW mode on/off, and used to set the reference
gain from a given reference standard. Refer to page 75 for further info.
TRIGGER CURVE:
Used to set the alarm to detect on either the DGS curve, or
independent GATE. Refer to page 75 for further info.
EFF PROBE DIAMETER:
Used to set the effective probe diameter of either a round
or square/rectangular crystal element, and used as a variable to calculate the near
field length. Refer to page 73 for further info.
PROBE FREQUENCY:
Used to set the center frequency of the probe/transducer.
The frequency will either be scribed on the probe itself, and additionally listed on the
transducer certificate. Refer to page 75 for further info.
CURVE SIZE (ERS):
Used to select the Effective Reflector Size that will be used
from the DGS/AVG chart. Refer to page 75 for further info.
ATTENUATION:
Toggles the ATTENUATION on/off. The parameters in the sub
menu are used to compensate for additional factors that affect the propagation of
sound energy, based on the material, surface condition, and differences between the
reference standards versus test material. Refer to page 76 for further info.
DVK:
Used to correct for increases in gain based on a curved reference
standard, to an actual back wall reflector. Refer to page 76 for further info.
MATERIAL LOSS:
Used to correct for the loss of sound in attenuative
materials and applications inspections where sound will travel long distances.
Refer to page 76 for further info.
REFERENCE LOSS:
Used to compensate for the loss of sound in the
reference standard. Refer to page 76 for further info.
TRANSFER LOSS:
Used to correct for the loss of sound based on the
surface of the actual test material. Refer to page 76 for further info.
DELAY VELOCITY:
Used to set the longitudinal velocity of the transducer delay line,
for both angle & straight beam probes, to account for the proportion of the near field
length in the delay line. Refer to page 75 for further info.
REFERENCE TYPE:
This option is used to set the type of reflector that will be used
during the setup and calibration process. The options are Back Wall, Side Drilled
Hole (SDH), or Flat Bottom Hole (FBH). Refer to page 75 for further info.
REFERENCE SIZE:
If the reference type was set to SDH or FBH, the size of the
reflector must be entered. Refer to page 75 for further info.
3.13 SETUP – Menu
