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Setting
Values
THRESHOLD#
%
POLARITY
POSITIVE
NEGATIVE
Some settings can be adjusted from the hot menu but all settings are found to adjust any of these
settings:
1. Select MENU/GT1 or GT2 and highlight the desired setting
2. Use the LEFT and RIGHT keys to scroll the value, or press ENTER to open the digits edit box
and adjust the value using the navigation buttons.
3. Press OK to set the value and return to the menu screen, or ESC to cancel.
4. Press MEAS to return to the measurement screen.
19 TRIG - TRIGONOMETRY MODE
19.1 ABOUT TRIGONOMETRY MODE
Trig mode is most commonly used for inspecting welded joints using an angle beam transducer.
Due to the location, orientation, and geometry of the weld, a straight beam transducer is typically
not suitable for inspection. As a result, a transducer emitting sound at a given angle will allow the
operator to position the transducer away from the weld, and skip into the weld at a given angle.
Therefore, in order to determine the location of a defect, given a specific angle, the trigonometry
mode is used.
This section describes the steps you need to take to setup and use trigonometry mode.
ANGLE BEAM TRANSDUCERS FOR WELD INSPECTION
Angle Beam Transducer
where:
SP =
Sound path
Angle =
Transducer angle
Thickness = Material thickness
X-Offset =
Front of wedge less Index
SD =
Surface distance
Depth =
Depth of flaw from surface
Function
Sets the sensitivity of the gate (its height).
Sets detection to occur on the positive going echo.
Sets detection to occur on the negative going echo.
Weld Inspection
36
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