8
5.2 RF A-SCAN MEASUREMENT SCREEN
The RF view shows the full sound wave as received by the gauge. The
vertical axis indicates the amplitude of the received wave and the
horizontal position indicates the time it is received, which is converted
into thickness units using the material velocity.
The point on the scan that is being used to calculate the digital
thickness reading is displayed as the vertical dashed line (see section
9 on gates). The RF screen is used for gauge setup prior to inspection.
5.3 RECT A-SCAN MEASUREMENT SCREEN
The rectified view shows only half of the waveform, either the positive
or negative half depending on the POLARITY selected.
The RECT display is the preferred view for flaw and pit inspections.
.
5.4 B-SCAN MEASUREMENT SCREEN
The time-based B-Scan display provides a cross sectional view of the
material being tested. In this example, the top, or accessible side of the
material is represented as 0.00”, and the bottom, or blind surface at
.500”.
This mode is used when you need to inspect the profile of the blind
surface. It can also be a useful view when scanning for pits and flaws.
The B-Scan display is equipped with a scan bar representing the
overall thickness. The scan bar gives the user a visual indication when
a flaw or defect passed over during the scan process.
If you are scanning a pipe, for instance, and pass over a pit during the
process, the scan bar will quickly deflect and alarm you to go back and
search for the defect.
5.5 DIGITS DISPLAY
The digits display shows the thickness as a value using a large font
size. This view is used typically when the gauge is being used as a
basic thickness gauge. The digits display includes the same scan bar
as the B-Scan display.
5.6 CHANGING THE VIEWABLE RANGE
In RF view, RECT view and B-SCAN view, if the waveform around the
detection point is not visible on the display, use one of the following
methods to adjust the viewable range off the display:
E
Measurement View Area
RF, RECT, B-SCAN or DIGITS view area.
F
Measurement Labels Bar Displays the viewable range and are based on the values of
DELAY/B-START and WIDTH/B-DEPTH
G
Hot Menu
The hot menu contains a selection of the most commonly used
options, allowing you to conveniently adjust these to your needs
while the graphical display is active
