Dakota Ultrasonics DFX-8 plus MANUAL1 - Manual (Page 17)

DFX-8 Series Ultrasonic Flaw Detectors
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POLARITY2: The gates can be set to detect on either the positive or negative
polarity, or stroke, of the half or full wave cycle. It should be noted that if the VIEW is
set to positive, and the gate negative, the DFX-8 will not display an amplitude
percentage of full screen height. Refer to page 33 for further info.
3.8 TRIG – Menu
TRIG: This feature toggles trigonometry feature on/off. This feature is used with
angle beam transducers for the inspection of welds, to calculate three
measurements: Beam path distance (
), Surface distance (), and Depth () from
the index point of the transducer. Refer to page 54 for further info.
THICKNESS: Used to set the thickness of the test material. The thickness will be
used to determine which skip/leg the DFX-8 is detecting on. Refer to page 54 for
further info.
ANGLE: Used to set the angle of the transducer, and used in the calculations above.
Refer to page 54 for further info.
X-OFFSET: This feature is used to calculate the surface distance in the trigonometry
function, as is a physical measurement from the index point of the probe to the front
of the wedge/can/shoe/case. Refer to page 54 for further info.
CSC OD: Curved surface correction to compensate for changing sound path
distance and angle. This feature is used in conjunction with ‘thickness’ in order to
calculate a correction factor. Refer to page 54 for further info.
3.9 AWS – Menu
AWS: This feature toggles the AWS feature on/off. Used in the analysis of welds
according to American Welding Society’s structural welding code D1.1-94, to
calculate the Indication Rating (IR). Refer to page 60 for further info.