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To select one of the existing DB STEP values:
- Activate the GAIN submenu (located in the BASIC menu) by pressing
the menu key below it.
- Press the function key next to the selection titled DB STEP.
- Change the DB STEP value by repeatedly pressing the corresponding
function key or by turning the knob.
Note that DB STEP value can be quickly changed by repeatedly pressing the
key
.
4.9 Auto Gain Feature
Use the Auto Gain function to automatically set the basic gain, so as to adjust
the peak echo to a target height.
- Set the target echo height using the AUTO function located in the FUNC
submenu.
- Press
GAIN
AUTO
to start the Auto Gain function.
“
AUTO-XX%
”
will be shown on
the screen.
- The Auto Gain function will end when the echo height reaches the target
value. Or you can stop the function by pressing
GAIN
AUTO
again.
4.10 Configuring the Gates
The gates monitor the range of the test object where you expect to detect a flaw.
If an echo exceeds or falls below the gate, an alarm signal is sent out via the
ALRM LED. The gate chooses the echo for the digital time-of-flight or amplitude
measurement.
The instrument has two gates: A gate and B gate. Gate A and B are
independent of one another. Setting the position and characteristics of the A-
and B-Gates is the first step to configuring the instrument for flaw detecting or
material-thickness measurement. The GATE menu controls not only the location
of the A and B-Gates, but also the alarms and other features activated when an
A-Scan signal crosses a specific gate.
A-Scan signals crossing the A or B-Gate are evaluated for the purposes of flaw
detection and material-thickness evaluation. When the signal crosses the A or
B-Gate, the maximum point (peak) of the signal (in the specific gate) is used for
evaluation purposes. The measured value is indicated in the measurement line.
Selecting a Gate
Selecting a gate by using the GATE
SEL function.
You can also repeatedly press
A/B
to
switch the selected gate between
Gate A and Gate B.
The selected gate will be shown in
solid line. The unselected gate will
be shown in dashed line.
NDTzone • Non-Destructive Testing Equipment Specialists
Tel.: +1.877.363.4243 • eMail: [email protected] • Web: www.NDTzone.com
