Checkline DFX-7 - Manual (Page 17)

DFX-7 Ultrasonic Flaw Detector
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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 55 for further info.
SET REF GAIN: The gain (in dB) required to set the indication level to a specific
percentage of full screen height (FSH). This value will typically be set somewhere
between 20%–90%. Refer to page 55 for further info.
ANGLE: This is used to set the angle of the transducer used for the calculations
above. Refer to page Error! Bookmark not defined. for further info.
X-OFFSET: This feature is used to calculate the surface distance in the trigonometry
function, as is a physical measurement for the index point of the probe to the front of
the wedge/can/shoe/case. Refer to page 55 for further info.
3.10 TCG – Menu
TCG: This feature toggles the TCG feature on/off. The Time Corrected Gain (TCG)
feature displays reflectors of equal size at equal A-Scan amplitudes, regardless of the
reflector’s depth in the test material. Refer to page 66 for further info.
DRAW: Toggles the DRAW mode on/off, and used to draw the TCG curve. Refer to
page 66 for further info.
CURVE: Toggles the TCG correction curve on/off, and the curve is displayed on the
screen. Refer to page 66 for further info.
% SCRN HEIGHT: This feature enables the user to set the reference level of the
TCG as a percentage of full screen height (FSH). Refer to page 66 for further info.
3.11 DAC – Menu
DAC: Toggles the DAC feature on/off/audible. A Distance Amplitude Correction
(DAC) curve is used to configure a variable threshold for the gate, using the same
size reflector at different distances. Refer to page 60 for further info.